head 1.6; access; symbols netbsd-11-0-RC4:1.4.2.2 TZDATA2026BGTZ:1.1.1.41 netbsd-11-0-RC3:1.4.2.1 TZDATA2026AGTZ:1.1.1.40 netbsd-11-0-RC2:1.4 netbsd-11-0-RC1:1.4 TZDATA2025CGTZ:1.1.1.40 perseant-exfatfs-base-20250801:1.4 netbsd-11:1.4.0.2 netbsd-11-base:1.4 TZDATA2025BGTZ:1.1.1.39 TZDATA2025AGTZ:1.1.1.38 TZDATA2025A:1.1.1.37 netbsd-10-1-RELEASE:1.1.1.32.2.3 TZDATA2024BGTZ:1.1.1.36 perseant-exfatfs-base-20240630:1.1.1.35 perseant-exfatfs:1.1.1.35.0.2 perseant-exfatfs-base:1.1.1.35 netbsd-8-3-RELEASE:1.1.1.16.4.11 netbsd-9-4-RELEASE:1.1.1.23.2.7 netbsd-10-0-RELEASE:1.1.1.32.2.3 netbsd-10-0-RC6:1.1.1.32.2.3 netbsd-10-0-RC5:1.1.1.32.2.3 netbsd-10-0-RC4:1.1.1.32.2.3 TZDATA2024AGTZ:1.1.1.35 netbsd-10-0-RC3:1.1.1.32.2.2 netbsd-10-0-RC2:1.1.1.32.2.2 TZDATA2023DGTZ:1.1.1.34 netbsd-10-0-RC1:1.1.1.32.2.1 TZDATA2023CGTZ:1.1.1.33 TZDATA2023BGTZ:1.1.1.33 TZDATA2023AGTZ:1.1.1.33 netbsd-10:1.1.1.32.0.2 netbsd-10-base:1.1.1.32 TZDATA2022GGTZ:1.1.1.32 TZDATA2022FGTZ:1.1.1.31 TZDATA2022EGTZ:1.1.1.30 TZDATA2022DGTZ:1.1.1.29 TZDATA2022CGTZ:1.1.1.29 netbsd-9-3-RELEASE:1.1.1.23.2.4 TZDATA2022AGTZ:1.1.1.28 cjep_sun2x-base1:1.1.1.27 cjep_sun2x:1.1.1.27.0.4 cjep_sun2x-base:1.1.1.27 cjep_staticlib_x-base1:1.1.1.27 netbsd-9-2-RELEASE:1.1.1.23.2.4 cjep_staticlib_x:1.1.1.27.0.2 cjep_staticlib_x-base:1.1.1.27 TZDATA2021A:1.1.1.27 TZDATA2020F:1.1.1.27 TZDATA2020D:1.1.1.26 TZDATA2020C:1.1.1.26 netbsd-9-1-RELEASE:1.1.1.23.2.3 TZDATA2020B:1.1.1.26 TZDATA2020A:1.1.1.25 phil-wifi-20200421:1.1.1.24 phil-wifi-20200411:1.1.1.24 is-mlppp:1.1.1.24.0.2 is-mlppp-base:1.1.1.24 phil-wifi-20200406:1.1.1.24 netbsd-8-2-RELEASE:1.1.1.16.4.6 netbsd-9-0-RELEASE:1.1.1.23.2.1 netbsd-9-0-RC2:1.1.1.23.2.1 netbsd-9-0-RC1:1.1.1.23.2.1 phil-wifi-20191119:1.1.1.24 TZDATA2019C:1.1.1.24 netbsd-9:1.1.1.23.0.2 netbsd-9-base:1.1.1.23 phil-wifi-20190609:1.1.1.23 netbsd-8-1-RELEASE:1.1.1.16.4.6 netbsd-8-1-RC1:1.1.1.16.4.6 TZDATA2019A:1.1.1.23 pgoyette-compat-merge-20190127:1.1.1.18.2.4 pgoyette-compat-20190127:1.1.1.22 pgoyette-compat-20190118:1.1.1.22 TZDATA2018I:1.1.1.22 TZDATA2018H:1.1.1.22 pgoyette-compat-1226:1.1.1.21 pgoyette-compat-1126:1.1.1.21 TZDATA2018G:1.1.1.21 pgoyette-compat-1020:1.1.1.20 TZDATA2018F:1.1.1.20 pgoyette-compat-0930:1.1.1.19 pgoyette-compat-0906:1.1.1.19 netbsd-7-2-RELEASE:1.1.1.1.4.10 pgoyette-compat-0728:1.1.1.19 netbsd-8-0-RELEASE:1.1.1.16.4.3 phil-wifi:1.1.1.19.0.2 phil-wifi-base:1.1.1.19 pgoyette-compat-0625:1.1.1.19 netbsd-8-0-RC2:1.1.1.16.4.3 pgoyette-compat-0521:1.1.1.19 TZDATA2018E:1.1.1.19 pgoyette-compat-0502:1.1.1.19 pgoyette-compat-0422:1.1.1.19 netbsd-8-0-RC1:1.1.1.16.4.3 pgoyette-compat-0415:1.1.1.19 pgoyette-compat-0407:1.1.1.19 pgoyette-compat-0330:1.1.1.19 TZDATA2018D:1.1.1.19 pgoyette-compat-0322:1.1.1.18 pgoyette-compat-0315:1.1.1.18 netbsd-7-1-2-RELEASE:1.1.1.1.4.7.2.2 pgoyette-compat:1.1.1.18.0.2 pgoyette-compat-base:1.1.1.18 TZDATA2018C:1.1.1.18 netbsd-7-1-1-RELEASE:1.1.1.1.4.7.2.2 matt-nb8-mediatek:1.1.1.16.4.1.0.2 matt-nb8-mediatek-base:1.1.1.16.4.1 TZDATA2017C:1.1.1.17 perseant-stdc-iso10646:1.1.1.16.0.6 perseant-stdc-iso10646-base:1.1.1.16 netbsd-8:1.1.1.16.0.4 netbsd-8-base:1.1.1.16 prg-localcount2-base3:1.1.1.16 prg-localcount2-base2:1.1.1.16 prg-localcount2-base1:1.1.1.16 prg-localcount2:1.1.1.16.0.2 prg-localcount2-base:1.1.1.16 pgoyette-localcount-20170426:1.1.1.16 bouyer-socketcan-base1:1.1.1.16 TZDATA2017B:1.1.1.16 pgoyette-localcount-20170320:1.1.1.15 netbsd-7-1:1.1.1.1.4.7.0.2 netbsd-7-1-RELEASE:1.1.1.1.4.7 TZDATA2017A:1.1.1.15 netbsd-7-1-RC2:1.1.1.1.4.6 netbsd-7-nhusb-base-20170116:1.1.1.1.4.6 bouyer-socketcan:1.1.1.14.0.2 bouyer-socketcan-base:1.1.1.14 pgoyette-localcount-20170107:1.1.1.14 netbsd-7-1-RC1:1.1.1.1.4.6 TZDATA2016J:1.1.1.14 pgoyette-localcount-20161104:1.1.1.14 TZDATA2016I:1.1.1.14 netbsd-7-0-2-RELEASE:1.1.1.1.4.4.2.1 TZDATA2016H:1.1.1.14 TZDATA2016G:1.1.1.13 localcount-20160914:1.1.1.12 netbsd-7-nhusb:1.1.1.1.4.5.0.2 netbsd-7-nhusb-base:1.1.1.1.4.5 TZDATA2016F:1.1.1.12 pgoyette-localcount-20160806:1.1.1.11 pgoyette-localcount-20160726:1.1.1.11 pgoyette-localcount:1.1.1.11.0.2 pgoyette-localcount-base:1.1.1.11 TZDATA2016D:1.1.1.11 netbsd-7-0-1-RELEASE:1.1.1.1.4.4.2.1 TZDATA2016B:1.1.1.10 netbsd-7-0:1.1.1.1.4.4.0.2 netbsd-7-0-RELEASE:1.1.1.1.4.4 TZDATA2015F:1.1.1.9 netbsd-7-0-RC3:1.1.1.1.4.3 netbsd-7-0-RC2:1.1.1.1.4.3 TZDATA2015E:1.1.1.8 netbsd-7-0-RC1:1.1.1.1.4.3 TZDATA2015B:1.1.1.7 TZDATA2015A:1.1.1.6 TZDATA2014J:1.1.1.5 TZDATA2014I:1.1.1.4 TZDATA2014H:1.1.1.3 TZDATA2014G:1.1.1.2 tls-maxphys-base:1.1.1.1 tls-maxphys:1.1.1.1.0.6 netbsd-7:1.1.1.1.0.4 netbsd-7-base:1.1.1.1 tls-earlyentropy:1.1.1.1.0.2 tls-earlyentropy-base:1.1.1.1 TZDATA2014F:1.1.1.1 TZDATA:1.1.1; locks; strict; comment @# @; 1.6 date 2026.04.29.11.10.21; author kre; state Exp; branches; next 1.5; commitid VusJJOVT12s1sQDG; 1.5 date 2025.12.19.00.59.25; author kre; state Exp; branches; next 1.4; commitid ZpAAKqYivWTshXmG; 1.4 date 2025.03.26.17.35.31; author kre; state Exp; branches 1.4.2.1; next 1.3; commitid 51LIvyJsTtUjpBOF; 1.3 date 2025.02.03.04.47.13; author kre; state Exp; branches; next 1.2; commitid I5GdBIKhQShiNYHF; 1.2 date 2025.02.02.00.39.55; author kre; state Exp; branches; next 1.1; commitid XKzhe1dLOb7gsPHF; 1.1 date 2014.08.08.08.56.49; author apb; state Exp; branches 1.1.1.1; next ; commitid iGXhXh3Wpi6OlxLx; 1.4.2.1 date 2026.04.02.16.33.43; author martin; state Exp; branches; next 1.4.2.2; commitid aup4agd012686pAG; 1.4.2.2 date 2026.05.07.14.17.21; author martin; state Exp; branches; next ; commitid W9rDwtbibRZIdTEG; 1.1.1.1 date 2014.08.08.08.56.49; author apb; state Exp; branches 1.1.1.1.2.1 1.1.1.1.4.1 1.1.1.1.6.1; next 1.1.1.2; commitid iGXhXh3Wpi6OlxLx; 1.1.1.2 date 2014.08.31.06.46.23; author apb; state Exp; branches; next 1.1.1.3; commitid 97niuh41EisdTtOx; 1.1.1.3 date 2014.10.04.11.42.12; author apb; state Exp; branches; next 1.1.1.4; commitid 3DEqqETZ5KmWqSSx; 1.1.1.4 date 2014.10.23.03.37.23; author apb; state Exp; branches; next 1.1.1.5; commitid jKnsSpMUSkPJ8hVx; 1.1.1.5 date 2014.11.16.07.08.11; author apb; state Exp; branches; next 1.1.1.6; commitid 3SkT3wPXTpSexnYx; 1.1.1.6 date 2015.01.31.18.23.15; author apb; state Exp; branches; next 1.1.1.7; commitid bjXoHWtuRrKnPc8y; 1.1.1.7 date 2015.03.21.15.45.37; author apb; state Exp; branches; next 1.1.1.8; commitid GIz4juHFOXHDnuey; 1.1.1.8 date 2015.06.21.15.18.58; author apb; state Exp; branches; next 1.1.1.9; commitid ASMPsep5T29Kgjqy; 1.1.1.9 date 2015.08.11.18.07.10; author apb; state Exp; branches; next 1.1.1.10; commitid kmpTo6XW4QHazSwy; 1.1.1.10 date 2016.03.15.17.10.28; author christos; state Exp; branches; next 1.1.1.11; commitid LgY9iK53zwvbgLYy; 1.1.1.11 date 2016.06.01.00.03.15; author agc; state Exp; branches 1.1.1.11.2.1; next 1.1.1.12; commitid SOPsfX18yKYt5H8z; 1.1.1.12 date 2016.08.07.00.49.16; author kre; state Exp; branches; next 1.1.1.13; commitid rhYGciKcCLWDbjhz; 1.1.1.13 date 2016.09.29.20.40.59; author kre; state Exp; branches; next 1.1.1.14; commitid AKHKNrnsUu7T4eoz; 1.1.1.14 date 2016.10.20.23.12.36; author kre; state Exp; branches 1.1.1.14.2.1; next 1.1.1.15; commitid 3et8Pru6nxO2fWqz; 1.1.1.15 date 2017.03.01.00.37.31; author kre; state Exp; branches; next 1.1.1.16; commitid G61CluXIjUN4vMHz; 1.1.1.16 date 2017.03.21.19.22.54; author kre; state Exp; branches 1.1.1.16.4.1; next 1.1.1.17; commitid zdsE27TY4MGj5sKz; 1.1.1.17 date 2017.10.24.01.27.45; author kre; state Exp; branches; next 1.1.1.18; commitid mbHKYe3Y2Ihs9fcA; 1.1.1.18 date 2018.01.24.13.52.16; author kre; state Exp; branches 1.1.1.18.2.1; next 1.1.1.19; commitid PPD9y1NZfop2k8oA; 1.1.1.19 date 2018.03.24.01.45.20; author kre; state Exp; branches 1.1.1.19.2.1; next 1.1.1.20; commitid IWaIjLBDDMC1pEvA; 1.1.1.20 date 2018.10.19.04.31.45; author kre; state Exp; branches; next 1.1.1.21; commitid iPAtPIMEH88HBwWA; 1.1.1.21 date 2018.10.27.20.26.52; author kre; state Exp; branches; next 1.1.1.22; commitid lXtxXiymEWQmDDXA; 1.1.1.22 date 2018.12.30.00.40.51; author kre; state Exp; branches; next 1.1.1.23; commitid 2NsExeiOIm301L5B; 1.1.1.23 date 2019.03.26.10.06.23; author kre; state Exp; branches 1.1.1.23.2.1; next 1.1.1.24; commitid 0PGwXCYDuCdCnRgB; 1.1.1.24 date 2019.10.08.02.44.04; author kre; state Exp; branches; next 1.1.1.25; commitid 1AlmCKr6wQbiD0GB; 1.1.1.25 date 2020.04.25.12.16.59; author kre; state Exp; branches; next 1.1.1.26; commitid ABpciWj76gKinL5C; 1.1.1.26 date 2020.10.08.04.27.34; author kre; state Exp; branches; next 1.1.1.27; commitid tv1N52yw9rdnr3rC; 1.1.1.27 date 2020.12.31.07.50.11; author kre; state Exp; branches; next 1.1.1.28; commitid ZiQZHrT9SnNrRRBC; 1.1.1.28 date 2022.03.20.17.59.59; author kre; state Exp; branches; next 1.1.1.29; commitid 2CSshxT0svJPXYwD; 1.1.1.29 date 2022.08.17.12.17.54; author kre; state Exp; branches; next 1.1.1.30; commitid u6rSFtMNjFhyfeQD; 1.1.1.30 date 2022.10.13.11.25.07; author kre; state Exp; branches; next 1.1.1.31; commitid g0eArcouiXRN7yXD; 1.1.1.31 date 2022.10.30.01.03.03; author kre; state Exp; branches; next 1.1.1.32; commitid Amc6tVs2mojy8GZD; 1.1.1.32 date 2022.12.11.06.47.00; author kre; state Exp; branches 1.1.1.32.2.1; next 1.1.1.33; commitid GVY8e8XbxvXQG65E; 1.1.1.33 date 2023.03.23.16.31.15; author kre; state Exp; branches; next 1.1.1.34; commitid Wi2azCEtD4c2EgiE; 1.1.1.34 date 2023.12.23.15.38.16; author kre; state Exp; branches; next 1.1.1.35; commitid 7McRjQIF7CaNvBRE; 1.1.1.35 date 2024.02.05.21.34.44; author kre; state Exp; branches 1.1.1.35.2.1; next 1.1.1.36; commitid Ig2l9D6xJLMl4iXE; 1.1.1.36 date 2024.10.29.21.24.48; author kre; state Exp; branches; next 1.1.1.37; commitid vTpQ269FGpZTqBvF; 1.1.1.37 date 2025.02.01.23.00.29; author kre; state Exp; branches; next 1.1.1.38; commitid mdTcRyY35YinUOHF; 1.1.1.38 date 2025.02.02.00.43.13; author kre; state Exp; branches; next 1.1.1.39; commitid pskpHkzc1w3BtPHF; 1.1.1.39 date 2025.03.26.17.34.51; author kre; state Exp; branches; next 1.1.1.40; commitid 7btFJAJt1EX3pBOF; 1.1.1.40 date 2025.12.19.00.58.41; author kre; state Exp; branches; next 1.1.1.41; commitid VAKtOMN53YKehXmG; 1.1.1.41 date 2026.04.29.11.09.52; author kre; state Exp; branches; next ; commitid 1Znf0btghQpPrQDG; 1.1.1.1.2.1 date 2014.08.08.08.56.49; author tls; state dead; branches; next 1.1.1.1.2.2; commitid igbBQGexpTfGAMLx; 1.1.1.1.2.2 date 2014.08.10.06.51.01; author tls; state Exp; branches; next ; commitid igbBQGexpTfGAMLx; 1.1.1.1.4.1 date 2014.09.21.18.50.41; author snj; state Exp; branches; next 1.1.1.1.4.2; commitid VVDYrvzaZp7ccfRx; 1.1.1.1.4.2 date 2014.11.18.18.32.29; author snj; state Exp; branches; next 1.1.1.1.4.3; commitid 9Tbhffn21gxrfHYx; 1.1.1.1.4.3 date 2015.03.25.17.09.59; author snj; state Exp; branches; next 1.1.1.1.4.4; commitid Wjq3hLIIKowiH0fy; 1.1.1.1.4.4 date 2015.09.10.03.00.37; author snj; state Exp; branches 1.1.1.1.4.4.2.1; next 1.1.1.1.4.5; commitid lDxmggelKO4mAEAy; 1.1.1.1.4.5 date 2016.04.11.09.59.00; author snj; state Exp; branches 1.1.1.1.4.5.2.1; next 1.1.1.1.4.6; commitid t5XKjevTgDnb1c2z; 1.1.1.1.4.6 date 2016.12.13.07.29.24; author snj; state Exp; branches; next 1.1.1.1.4.7; commitid IyKxG8PcDdpGhNxz; 1.1.1.1.4.7 date 2017.03.02.07.46.02; author snj; state Exp; branches 1.1.1.1.4.7.2.1; next 1.1.1.1.4.8; commitid jG5UaWqOyo95QWHz; 1.1.1.1.4.8 date 2017.07.26.15.51.45; author snj; state Exp; branches; next 1.1.1.1.4.9; commitid AASI5WbxkJLOPK0A; 1.1.1.1.4.9 date 2017.11.05.20.42.18; author snj; state Exp; branches; next 1.1.1.1.4.10; commitid lUyNKQaJmTIaaTdA; 1.1.1.1.4.10 date 2018.03.25.14.06.33; author martin; state Exp; branches; next 1.1.1.1.4.11; commitid 9bv6yBXyEFjntQvA; 1.1.1.1.4.11 date 2018.10.30.19.29.39; author martin; state Exp; branches; next 1.1.1.1.4.12; commitid ezVFlUIpUFyOd1YA; 1.1.1.1.4.12 date 2019.01.07.14.00.31; author martin; state Exp; branches; next ; commitid N8FDNZdjMEmmbR6B; 1.1.1.1.4.4.2.1 date 2016.04.11.09.59.57; author snj; state Exp; branches; next 1.1.1.1.4.4.2.2; commitid TSwDz64NMxnG1c2z; 1.1.1.1.4.4.2.2 date 2016.12.13.07.28.23; author snj; state Exp; branches; next 1.1.1.1.4.4.2.3; commitid zc2ZPU46EscrhNxz; 1.1.1.1.4.4.2.3 date 2017.03.02.07.44.13; author snj; state Exp; branches; next 1.1.1.1.4.4.2.4; commitid IzENadUfmsFmPWHz; 1.1.1.1.4.4.2.4 date 2017.07.26.15.50.28; author snj; state Exp; branches; next 1.1.1.1.4.4.2.5; commitid L4LLzNNvnZ6lPK0A; 1.1.1.1.4.4.2.5 date 2017.11.05.20.44.41; author snj; state Exp; branches; next 1.1.1.1.4.4.2.6; commitid CwYTRqFsgKE0bTdA; 1.1.1.1.4.4.2.6 date 2018.03.25.14.11.39; author martin; state Exp; branches; next 1.1.1.1.4.4.2.7; commitid tixpPUjkrqqavQvA; 1.1.1.1.4.4.2.7 date 2018.10.30.19.36.52; author martin; state Exp; branches; next 1.1.1.1.4.4.2.8; commitid jr5eATXwdQGhg1YA; 1.1.1.1.4.4.2.8 date 2019.01.07.14.04.55; author martin; state Exp; branches; next ; commitid hXICEH5aawLUcR6B; 1.1.1.1.4.5.2.1 date 2017.01.18.08.46.22; author skrll; state Exp; branches; next 1.1.1.1.4.5.2.2; commitid M6f3RyDtiAR3wqCz; 1.1.1.1.4.5.2.2 date 2017.03.13.07.41.25; author skrll; state Exp; branches; next ; commitid vH6VFbpxnMy7rmJz; 1.1.1.1.4.7.2.1 date 2017.07.26.15.51.13; author snj; state Exp; branches; next 1.1.1.1.4.7.2.2; commitid QHqC16qrESpuPK0A; 1.1.1.1.4.7.2.2 date 2017.11.05.20.43.37; author snj; state Exp; branches; next 1.1.1.1.4.7.2.3; commitid 4GjqsuHWRN3DaTdA; 1.1.1.1.4.7.2.3 date 2018.03.25.14.09.31; author martin; state Exp; branches; next 1.1.1.1.4.7.2.4; commitid y4vLirt4t2sruQvA; 1.1.1.1.4.7.2.4 date 2018.10.30.19.31.48; author martin; state Exp; branches; next 1.1.1.1.4.7.2.5; commitid umzgDrJ1I3mze1YA; 1.1.1.1.4.7.2.5 date 2019.01.07.14.03.21; author martin; state Exp; branches; next ; commitid fL1PAPiDXb9mcR6B; 1.1.1.1.6.1 date 2014.08.08.08.56.49; author tls; state dead; branches; next 1.1.1.1.6.2; commitid jTnpym9Qu0o4R1Nx; 1.1.1.1.6.2 date 2014.08.20.00.00.21; author tls; state Exp; branches; next ; commitid jTnpym9Qu0o4R1Nx; 1.1.1.11.2.1 date 2016.11.04.14.48.51; author pgoyette; state Exp; branches; next 1.1.1.11.2.2; commitid 2m1JRwYmpwPkOOsz; 1.1.1.11.2.2 date 2017.03.20.06.56.54; author pgoyette; state Exp; branches; next 1.1.1.11.2.3; commitid jjw7cAwgyKq7RfKz; 1.1.1.11.2.3 date 2017.04.26.02.52.52; author pgoyette; state Exp; branches; next ; commitid ojV02aOSdzvBqZOz; 1.1.1.14.2.1 date 2017.04.21.16.53.05; author bouyer; state Exp; branches; next ; commitid dUG7nkTKALCadqOz; 1.1.1.16.4.1 date 2017.11.02.21.02.06; author snj; state Exp; branches; next 1.1.1.16.4.2; commitid FmNdBv7Bu0C8mvdA; 1.1.1.16.4.2 date 2018.01.31.19.39.50; author martin; state Exp; branches; next 1.1.1.16.4.3; commitid I2GaJUZc3BCZ04pA; 1.1.1.16.4.3 date 2018.03.24.18.03.21; author snj; state Exp; branches; next 1.1.1.16.4.4; commitid DPgyGeUZFADBOJvA; 1.1.1.16.4.4 date 2018.10.21.12.10.23; author martin; state Exp; branches; 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1.1.1.32.2.4 date 2025.04.12.12.47.26; author martin; state Exp; branches; next 1.1.1.32.2.5; commitid iC6dUDY9pz4hgLQF; 1.1.1.32.2.5 date 2025.04.13.15.13.18; author bouyer; state Exp; branches; next ; commitid mWJcQVaK58MF2UQF; 1.1.1.35.2.1 date 2025.08.02.05.54.25; author perseant; state Exp; branches; next ; commitid 23j6GFaDws3O875G; desc @@ 1.6 log @Merge tzdata2026b @ text @# tzdb data for North and Central America and environs # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. # also includes Central America and the Caribbean # This file is by no means authoritative; if you think you know better, # go ahead and edit the file, and please send any changes to # the public mailing list tz@@iana.org for general use in the future. # For more, please see the file CONTRIBUTING in the tz distribution. # From Paul Eggert (1999-03-22): # A reliable and entertaining source about time zones is # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). ############################################################################### # United States # From Paul Eggert (1999-03-31): # Howse writes (pp 121-125) that time zones were invented by # Professor Charles Ferdinand Dowd (1825-1904), # Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). # His pamphlet "A System of National Time for Railroads" (1870) # was the result of his proposals at the Convention of Railroad Trunk Lines # in New York City (1869-10). His 1870 proposal was based on Washington, DC, # but in 1872-05 he moved the proposed origin to Greenwich. # From Paul Eggert (2024-11-18): # Dowd's proposal left many details unresolved, such as where to draw # lines between time zones. Sandford Fleming of the Canadian Pacific Railway # argued for Dowd's proposal in 1876, and Cleveland Abbe of the American # Meteorology Society published a report in 1879 recommending four US time # zones based on GMT. However, the key individual who made time zones # work in the US was William Frederick Allen - railway engineer, # managing editor of the Travelers' Guide, and secretary of the # General Time Convention, a railway standardization group. Allen # spent months in dialogs with scientific and railway leaders, # developed a workable plan to institute time zones, and presented it # to the General Time Convention on 1883-04-11, saying that his plan # meant "local time would be practically abolished" - a plus for # railway scheduling. By the next convention on 1883-10-11 nearly all # railroads had agreed and it took effect on 1883-11-18. That Sunday # was called the "day of two noons", as some locations observed noon # twice. Allen witnessed the transition in New York City, writing: # # I heard the bells of St. Paul's strike on the old time. Four # minutes later, obedient to the electrical signal from the Naval # Observatory ... the time-ball made its rapid descent, the chimes # of old Trinity rang twelve measured strokes, and local time was # abandoned, probably forever. # # Most of the US soon followed suit. See: # Bartky IR. The adoption of standard time. Technol Cult 1989 Jan;30(1):25-56. # https://dx.doi.org/10.2307/3105430 # From Paul Eggert (2005-04-16): # That 1883 transition occurred at 12:00 new time, not at 12:00 old time. # See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). # From Paul Eggert (2006-03-22): # A good source for time zone historical data in the US is # Thomas G. Shanks, The American Atlas (5th edition), # San Diego: ACS Publications, Inc. (1991). # Make sure you have the errata sheet; the book is somewhat useless without it. # It is the source for most of the pre-1991 US entries below. # From Paul Eggert (2001-03-06): # Daylight Saving Time was first suggested as a joke by Benjamin Franklin # in his whimsical essay "An Economical Project for Diminishing the Cost # of Light" published in the Journal de Paris (1784-04-26). # Not everyone is happy with the results: # # I don't really care how time is reckoned so long as there is some # agreement about it, but I object to being told that I am saving # daylight when my reason tells me that I am doing nothing of the kind. # I even object to the implication that I am wasting something # valuable if I stay in bed after the sun has risen. As an admirer # of moonlight I resent the bossy insistence of those who want to # reduce my time for enjoying it. At the back of the Daylight Saving # scheme I detect the bony, blue-fingered hand of Puritanism, eager # to push people into bed earlier, and get them up earlier, to make # them healthy, wealthy and wise in spite of themselves. # # -- Robertson Davies, The diary of Samuel Marchbanks, # Clarke, Irwin (1947), XIX, Sunday # # For more about the first ten years of DST in the United States, see # Robert Garland, Ten years of daylight saving from the Pittsburgh standpoint # (Carnegie Library of Pittsburgh, 1927). # https://web.archive.org/web/20160517155308/http://www.clpgh.org/exhibit/dst.html # # Shanks says that DST was called "War Time" in the US in 1918 and 1919. # However, DST was imposed by the Standard Time Act of 1918, which # was the first nationwide legal time standard, and apparently # time was just called "Standard Time" or "Daylight Saving Time". # From Paul Eggert (2019-06-04): # Here is the legal basis for the US federal rules. # * Public Law 65-106 (1918-03-19) implemented standard and daylight saving # time for the first time across the US, springing forward on March's last # Sunday and falling back on October's last Sunday. # https://www.loc.gov/law/help/statutes-at-large/65th-congress/session-2/c65s2ch24.pdf # * Public Law 66-40 (1919-08-20) repealed DST on October 1919's last Sunday. # https://www.loc.gov/law/help/statutes-at-large/66th-congress/session-1/c66s1ch51.pdf # * Public Law 77-403 (1942-01-20) started wartime DST on 1942-02-09. # https://www.loc.gov/law/help/statutes-at-large/77th-congress/session-2/c77s2ch7.pdf # * Public Law 79-187 (1945-09-25) ended wartime DST on 1945-09-30. # https://www.loc.gov/law/help/statutes-at-large/79th-congress/session-1/c79s1ch388.pdf # * Public Law 89-387 (1966-04-13) reinstituted a national standard for DST, # from April's last Sunday to October's last Sunday, effective 1967. # https://www.govinfo.gov/content/pkg/STATUTE-80/pdf/STATUTE-80-Pg107.pdf # * Public Law 93-182 (1973-12-15) moved the 1974 spring-forward to 01-06. # https://www.govinfo.gov/content/pkg/STATUTE-87/pdf/STATUTE-87-Pg707.pdf # * Public Law 93-434 (1974-10-05) moved the 1975 spring-forward to # February's last Sunday. # https://www.govinfo.gov/content/pkg/STATUTE-88/pdf/STATUTE-88-Pg1209.pdf # * Public Law 99-359 (1986-07-08) moved the spring-forward to April's first # Sunday. # https://www.govinfo.gov/content/pkg/STATUTE-100/pdf/STATUTE-100-Pg764.pdf # * Public Law 109-58 (2005-08-08), effective 2007, moved the spring-forward # to March's second Sunday and the fall-back to November's first Sunday. # https://www.govinfo.gov/content/pkg/PLAW-109publ58/pdf/PLAW-109publ58.pdf # All transitions are at 02:00 local time. # From Arthur David Olson: # Before the Uniform Time Act of 1966 took effect in 1967, observance of # Daylight Saving Time in the US was by local option, except during wartime. # From Arthur David Olson (2000-09-25): # Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. # In the introduction, Oboler spoke of "Eastern Peace Time." # An AltaVista search turned up: # https://web.archive.org/web/20000926032210/http://rowayton.org/rhs/hstaug45.html # "When the time is announced over the radio now, it is 'Eastern Peace # Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." # (August 1945) by way of confirmation. # # From Paul Eggert (2017-09-23): # This was the V-J Day issue of the Clamdigger, a Rowayton, CT newsletter. # From Joseph Gallant citing # George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): # At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set # to switch to London for Attlee's address, but the American people # never got to hear his speech live. According to one press account, # CBS' Bob Trout was first to announce the word of Japan's surrender, # but a few seconds later, NBC, ABC and Mutual also flashed the word # of surrender, all of whom interrupting the bells of Big Ben in # London which were to precede Mr. Attlee's speech. # From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From # Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: # # ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. # Any announcement from Asia would reach St. John's New York newsroom on a # wire service teletype machine, which had prescribed signals for major news. # Associated Press, for example, would ring five bells before spewing out # typed copy of an important story, and 10 bells for news "of transcendental # importance." # # On Aug. 14, stalling while talking steadily into the NBC networks' open # microphone, St. John heard five bells and waited only to hear a sixth bell, # before announcing confidently: "Ladies and gentlemen, World War II is over. # The Japanese have agreed to our surrender terms." # # He had scored a 20-second scoop on other broadcasters. # From Arthur David Olson (2005-08-22): # Paul has been careful to use the "US" rules only in those locations # that are part of the United States; this reflects the real scope of # U.S. government action. So even though the "US" rules have changed # in the latest release, other countries won't be affected. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule US 1918 1919 - Mar lastSun 2:00 1:00 D Rule US 1918 1919 - Oct lastSun 2:00 0 S Rule US 1942 only - Feb 9 2:00 1:00 W # War Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace Rule US 1945 only - Sep 30 2:00 0 S Rule US 1967 2006 - Oct lastSun 2:00 0 S Rule US 1967 1973 - Apr lastSun 2:00 1:00 D Rule US 1974 only - Jan 6 2:00 1:00 D Rule US 1975 only - Feb lastSun 2:00 1:00 D Rule US 1976 1986 - Apr lastSun 2:00 1:00 D Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D Rule US 2007 max - Mar Sun>=8 2:00 1:00 D Rule US 2007 max - Nov Sun>=1 2:00 0 S # From U. S. Naval Observatory (1989-01-19): # USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON # USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 # USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON # USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 # USA MOUNTAIN 7 H BEHIND UTC DENVER # USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 # USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO # USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 # USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) # USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) # USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W # USA " 9 H BEHIND UTC APR 3 - OCT 30 # USA HAWAII 10 H BEHIND UTC # USA BERING 11 H BEHIND UTC SAMOA, MIDWAY # From Arthur David Olson (1989-01-21): # The above dates are for 1988. # Note the "AKST" and "AKDT" abbreviations, the claim that there's # no DST in Samoa, and the claim that there is DST in Alaska and the # Aleutians. # From Arthur David Olson (1988-02-13): # Legal standard time zone names, from United States Code (1982 Edition and # Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names # up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 # took effect), as explained in sections 263 and 261: # (none) # United States standard eastern time # United States standard mountain time # United States standard central time # United States standard Pacific time # (none) # United States standard Alaska time # (none) # Next, names from 1967-04-01 until 1983-11-30 (the date for # public law 98-181): # Atlantic standard time # eastern standard time # central standard time # mountain standard time # Pacific standard time # Yukon standard time # Alaska-Hawaii standard time # Bering standard time # And after 1983-11-30: # Atlantic standard time # eastern standard time # central standard time # mountain standard time # Pacific standard time # Alaska standard time # Hawaii-Aleutian standard time # Samoa standard time # The law doesn't give abbreviations. # # From Paul Eggert (2016-12-19): # Here are URLs for the 1918 and 1966 legislation: # http://uscode.house.gov/statviewer.htm?volume=40&page=451 # http://uscode.house.gov/statviewer.htm?volume=80&page=108 # Although the 1918 names were officially "United States Standard # Eastern Time" and similarly for "Central", "Mountain", "Pacific", # and "Alaska", in practice "Standard" was placed just before "Time", # as codified in 1966. In practice, Alaska time was abbreviated "AST" # before 1968. Summarizing the 1967 name changes: # 1918 names 1967 names # -08 Standard Pacific Time (PST) Pacific standard time (PST) # -09 (unofficial) Yukon (YST) Yukon standard time (YST) # -10 Standard Alaska Time (AST) Alaska-Hawaii standard time (AHST) # -11 (unofficial) Nome (NST) Bering standard time (BST) # # From Paul Eggert (2023-01-23), from a 2001-01-08 heads-up from Rives McDow: # Public law 106-564 (2000-12-23) introduced "Chamorro standard time" # for time in Guam and the Northern Marianas. See the file "australasia". # Also see 15 U.S.C. §263 . # # From Paul Eggert (2015-04-17): # HST and HDT are standardized abbreviations for Hawaii-Aleutian # standard and daylight times. See section 9.47 (p 234) of the # U.S. Government Printing Office Style Manual (2008) # https://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf # From Arthur David Olson, 2005-08-09 # The following was signed into law on 2005-08-08. # # H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. # (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15 # U.S.C. 260a(a)) is amended-- # (1) by striking "first Sunday of April" and inserting "second # Sunday of March"; and # (2) by striking "last Sunday of October" and inserting "first # Sunday of November'. # (b) Effective Date.--Subsection (a) shall take effect 1 year after the # date of enactment of this Act or March 1, 2007, whichever is later. # (c) Report to Congress.--Not later than 9 months after the effective # date stated in subsection (b), the Secretary shall report to Congress # on the impact of this section on energy consumption in the United # States. # (d) Right to Revert.--Congress retains the right to revert the # Daylight Saving Time back to the 2005 time schedules once the # Department study is complete. # US eastern time, represented by New York # Connecticut, Delaware, District of Columbia, most of Florida, # Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky # (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, # New Hampshire, New Jersey, New York, North Carolina, Ohio, # Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, # Vermont, Virginia, West Virginia # From Dave Cantor (2004-11-02): # Early this summer I had the occasion to visit the Mount Washington # Observatory weather station atop (of course!) Mount Washington [, NH].... # One of the staff members said that the station was on Eastern Standard Time # and didn't change their clocks for Daylight Saving ... so that their # reports will always have times which are 5 hours behind UTC. # From Paul Eggert (2005-08-26): # According to today's Huntsville Times # http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1 # a few towns on Alabama's "eastern border with Georgia, such as Phenix City # in Russell County, Lanett in Chambers County and some towns in Lee County, # set their watches and clocks on Eastern time." It quotes H.H. "Bubba" # Roberts, city administrator in Phenix City. as saying "We are in the Central # time zone, but we do go by the Eastern time zone because so many people work # in Columbus." # # From Paul Eggert (2017-02-22): # Four cities are involved. The two not mentioned above are Smiths Station # and Valley. Barbara Brooks, Valley's assistant treasurer, heard it started # because West Point Pepperell textile mills were in Alabama while the # corporate office was in Georgia, and residents voted to keep Eastern # time even after the mills closed. See: Kazek K. Did you know which # Alabama towns are in a different time zone? al.com 2017-02-06. # http://www.al.com/living/index.ssf/2017/02/do_you_know_which_alabama_town.html # From Paul Eggert (2014-09-06): # Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208 # says that New York City Hall time was 3 minutes 58.4 seconds fast of # Eastern time (i.e., -4:56:01.6) just before the 1883 switch. # Rule NAME FROM TO - IN ON AT SAVE LETTER Rule NYC 1920 only - Mar lastSun 2:00 1:00 D Rule NYC 1920 only - Oct lastSun 2:00 0 S Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D Rule NYC 1921 1954 - Sep lastSun 2:00 0 S Rule NYC 1955 1966 - Oct lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] #STDOFF -4:56:01.6 Zone America/New_York -4:56:02 - LMT 1883 Nov 18 17:00u -5:00 US E%sT 1920 -5:00 NYC E%sT 1942 -5:00 US E%sT 1946 -5:00 NYC E%sT 1967 -5:00 US E%sT # US central time, represented by Chicago # Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, # Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and # Washington counties), Illinois, western Indiana # (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, # Vanderburgh, and Warrick counties), Iowa, most of Kansas, western # Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern # Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, # western Tennessee, most of Texas, Wisconsin # From Paul Eggert (2018-01-07): # In 1869 the Chicago Astronomical Society contracted with the city to keep # time. Though delayed by the Great Fire, by 1880 a wire ran from the # Dearborn Observatory (on the University of Chicago campus) to City Hall, # which then sent signals to police and fire stations. However, railroads got # their time signals from the Allegheny Observatory, the Madison Observatory, # the Ann Arbor Observatory, etc., so their clocks did not agree with each # other or with the city's official time. The confusion took some years to # clear up. See: # Moser M. How Chicago gave America its time zones. Chicago. 2018-01-04. # http://www.chicagomag.com/city-life/January-2018/How-Chicago-Gave-America-Its-Time-Zones/ # From Larry M. Smith (2006-04-26) re Wisconsin: # https://docs.legis.wisconsin.gov/statutes/statutes/175.pdf # is currently enforced at the 01:00 time of change. Because the local # "bar time" in the state corresponds to 02:00, a number of citations # are issued for the "sale of class 'B' alcohol after prohibited # hours" within the deviated hour of this change every year.... # # From Douglas R. Bomberg (2007-03-12): # Wisconsin has enacted (nearly eleventh-hour) legislation to get WI # Statue 175 closer in synch with the US Congress' intent.... # https://docs.legis.wisconsin.gov/2007/related/acts/3 # From an email administrator of the City of Fort Pierre, SD (2015-12-21): # Fort Pierre is technically located in the Mountain time zone as is # the rest of Stanley County. Most of Stanley County and Fort Pierre # uses the Central time zone due to doing most of their business in # Pierre so it simplifies schedules. I have lived in Stanley County # all my life and it has been that way since I can remember. (43 years!) # # From Paul Eggert (2015-12-25): # Assume this practice predates 1970, so Fort Pierre can use America/Chicago. # From Paul Eggert (2015-04-06): # In 1950s Nashville a public clock had dueling faces, one for conservatives # and the other for liberals; the two sides didn't agree about the time of day. # I haven't found a photo of this clock, nor have I tracked down the TIME # magazine report cited below, but here's the story as told by the late # American journalist John Seigenthaler, who was there: # # "The two [newspaper] owners held strongly contrasting political and # ideological views. Evans was a New South liberal, Stahlman an Old South # conservative, and their two papers frequently clashed editorially, often on # the same day.... In the 1950s as the state legislature was grappling with # the question of whether to approve daylight saving time for the entire state, # TIME magazine reported: # # "'The Nashville Banner and The Nashville Tennessean rarely agree on anything # but the time of day - and last week they couldn't agree on that.' # # "It was all too true. The clock on the front of the building had two faces - # The Tennessean side of the building facing west, the other, east. When it # was high noon Banner time, it was 11 a.m. Tennessean time." # # Seigenthaler J. For 100 years, Tennessean had it covered. # The Tennessean 2007-05-11, republished 2015-04-06. # https://www.tennessean.com/story/insider/extras/2015/04/06/archives-seigenthaler-for-100-years-the-tennessean-had-it-covered/25348545/ # Rule NAME FROM TO - IN ON AT SAVE LETTER Rule Chicago 1920 only - Jun 13 2:00 1:00 D Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 18:00u -6:00 US C%sT 1920 -6:00 Chicago C%sT 1936 Mar 1 2:00 -5:00 - EST 1936 Nov 15 2:00 -6:00 Chicago C%sT 1942 -6:00 US C%sT 1946 -6:00 Chicago C%sT 1967 -6:00 US C%sT # Oliver County, ND switched from mountain to central time on 1992-10-25. Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 19:00u -7:00 US M%sT 1992 Oct 25 2:00 -6:00 US C%sT # Morton County, ND, switched from mountain to central time on # 2003-10-26, except for the area around Mandan which was already central time. # See . # Officially this switch also included part of Sioux County, and # Jones, Mellette, and Todd Counties in South Dakota; # but in practice these other counties were already observing central time. # See . Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 19:00u -7:00 US M%sT 2003 Oct 26 2:00 -6:00 US C%sT # From Josh Findley (2011-01-21): # ...it appears that Mercer County, North Dakota, changed from the # mountain time zone to the central time zone at the last transition from # daylight-saving to standard time (on Nov. 7, 2010): # https://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm # http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html # From Andy Lipscomb (2011-01-24): # ...according to the Census Bureau, the largest city is Beulah (although # it's commonly referred to as Beulah-Hazen, with Hazen being the next # largest city in Mercer County). Google Maps places Beulah's city hall # at 47° 15' 51" N, 101° 46' 40" W, which yields an offset of 6h47'07". Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 19:00u -7:00 US M%sT 2010 Nov 7 2:00 -6:00 US C%sT # US mountain time, represented by Denver # # Colorado, far western Kansas, Montana, western # Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), # New Mexico, southwestern North Dakota, # western South Dakota, far western Texas (El Paso County, Hudspeth County, # and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming # # From Paul Eggert (2018-10-25): # On 1921-03-04 federal law placed all of Texas into the central time zone. # However, El Paso ignored the law for decades and continued to observe # mountain time, on the grounds that that's what they had always done # and they weren't about to let the federal government tell them what to do. # Eventually the federal government gave in and changed the law on # 1970-04-10 to match what El Paso was actually doing. Although # that's slightly after our 1970 cutoff, there is no need to create a # separate zone for El Paso since they were ignoring the law anyway. See: # Long T. El Pasoans were time rebels, fought to stay in Mountain zone. # El Paso Times. 2018-10-24 06:40 -06. # https://www.elpasotimes.com/story/news/local/el-paso/2018/10/24/el-pasoans-were-time-rebels-fought-stay-mountain-zone/1744509002/ # # Rule NAME FROM TO - IN ON AT SAVE LETTER Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D Rule Denver 1920 only - Oct lastSun 2:00 0 S Rule Denver 1921 only - May 22 2:00 0 S Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D Rule Denver 1965 1966 - Oct lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Denver -6:59:56 - LMT 1883 Nov 18 19:00u -7:00 US M%sT 1920 -7:00 Denver M%sT 1942 -7:00 US M%sT 1946 -7:00 Denver M%sT 1967 -7:00 US M%sT # US Pacific time, represented by Los Angeles # # California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, # Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county # north of the Salmon River, and the towns of Burgdorf and Warren), # Nevada (except West Wendover), Oregon (except the northern ¾ of # Malheur county), and Washington # From Paul Eggert (2016-08-20): # In early February 1948, in response to California's electricity shortage, # PG&E changed power frequency from 60 to 59.5 Hz during daylight hours, # causing electric clocks to lose six minutes per day. (This did not change # legal time, and is not part of the data here.) See: # Ross SA. An energy crisis from the past: Northern California in 1948. # Working Paper No. 8, Institute of Governmental Studies, UC Berkeley, # 1973-11. https://escholarship.org/uc/item/8x22k30c # # In another measure to save electricity, DST was instituted from 1948-03-14 # at 02:01 to 1949-01-16 at 02:00, with the governor having the option to move # the fallback transition earlier. See pages 3-4 of: # http://clerk.assembly.ca.gov/sites/clerk.assembly.ca.gov/files/archive/Statutes/1948/48Vol1_Chapters.pdf # # In response: # # Governor Warren received a torrent of objecting mail, and it is not too much # to speculate that the objections to Daylight Saving Time were one important # factor in the defeat of the Dewey-Warren Presidential ticket in California. # -- Ross, p 25 # # On December 8 the governor exercised the option, setting the date to January 1 # (LA Times 1948-12-09). The transition time was 02:00 (LA Times 1949-01-01). # # Despite the controversy, in 1949 California voters approved Proposition 12, # which established DST from April's last Sunday at 01:00 until September's # last Sunday at 02:00. This was amended by 1962's Proposition 6, which changed # the fall-back date to October's last Sunday. See: # https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props # https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props # # Rule NAME FROM TO - IN ON AT SAVE LETTER Rule CA 1948 only - Mar 14 2:01 1:00 D Rule CA 1949 only - Jan 1 2:00 0 S Rule CA 1950 1966 - Apr lastSun 1:00 1:00 D Rule CA 1950 1961 - Sep lastSun 2:00 0 S Rule CA 1962 1966 - Oct lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 20:00u -8:00 US P%sT 1946 -8:00 CA P%sT 1967 -8:00 US P%sT # Alaska # AK%sT is the modern abbreviation for -09 per USNO. # # From Paul Eggert (2017-06-15): # Howse writes that Alaska switched from the Julian to the Gregorian calendar, # and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. # On Friday, 1867-10-18 (Gregorian), at precisely 15:30 local time, the # Russian forts and fleet at Sitka fired salutes to mark the ceremony of # formal transfer. See the Sacramento Daily Union (1867-11-14), p 3, col 2. # https://cdnc.ucr.edu/cgi-bin/cdnc?a=d&d=SDU18671114.2.12.1 # Sitka workers did not change their calendars until Sunday, 1867-10-20, # and so celebrated two Sundays that week. See: Ahllund T (tr Hallamaa P). # From the memoirs of a Finnish workman. Alaska History. 2006 Fall;21(2):1-25. # http://alaskahistoricalsociety.org/wp-content/uploads/2016/12/Ahllund-2006-Memoirs-of-a-Finnish-Workman.pdf # Include only the time zone part of this transition, ignoring the switch # from Julian to Gregorian, since we can't represent the Julian calendar. # # As far as we know, of the locations mentioned below only Sitka was # permanently inhabited in 1867 by anyone using either calendar. # (Yakutat was colonized by the Russians in 1799, but the settlement was # destroyed in 1805 by a Yakutat-kon war party.) Many of Alaska's inhabitants # were unaware of the US acquisition of Alaska, much less of any calendar or # time change. However, the Russian-influenced part of Alaska did observe # Russian time, and it is more accurate to model this than to ignore it. # The database format requires an exact transition time; use the Russian # salute as a somewhat-arbitrary time for the formal transfer of control for # all of Alaska. Sitka's UTC offset is -9:01:13; adjust its 15:30 to the # local times of other Alaskan locations so that they change simultaneously. # From Paul Eggert (2014-07-18): # One opinion of the early 1980s turmoil in Alaska over time zones and # daylight saving time appeared as graffiti on a Juneau airport wall: # "Welcome to Juneau. Please turn your watch back to the 19th century." # See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01. # http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html # # Steve Ferguson (2011-01-31) referred to the following source: # Norris F. Keeping time in Alaska: national directives, local response. # Alaska History 2001;16(1-2). # http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/keeping-time-in-alaska/ # From Arthur David Olson (2011-02-01): # Here's database-relevant material from the 2001 "Alaska History" article: # # On September 20 [1979]...DOT...officials decreed that on April 27, # 1980, Juneau and other nearby communities would move to Yukon Time. # Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on # Pacific Time. # # ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the # Department's September 1979 decision. Juneau and other communities in # northern Southeast reverted to Pacific Time on October 26. # # On October 28 [1983]...the Metlakatla Indian Community Council voted # unanimously to keep the reservation on Pacific Time. # # According to DOT official Joanne Petrie, Indian reservations are not # bound to follow time zones imposed by neighboring jurisdictions. # # (The last is consistent with how the database now handles the Navajo # Nation.) # From Arthur David Olson (2011-02-09): # I just spoke by phone with a staff member at the Metlakatla Indian # Community office (using contact information available at # http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla # It's shortly after 1:00 here on the east coast of the United States; # the staffer said it was shortly after 10:00 there. When I asked whether # that meant they were on Pacific time, they said no - they were on their # own time. I asked about daylight saving; they said it wasn't used. I # did not inquire about practices in the past. # From Arthur David Olson (2011-08-17): # For lack of better information, assume that Metlakatla's # abandonment of use of daylight saving resulted from the 1983 vote. # From Steffen Thorsen (2015-11-09): # It seems Metlakatla did go off PST on Sunday, November 1, changing # their time to AKST and are going to follow Alaska's DST, switching # between AKST and AKDT from now on.... # https://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/ # From Ryan Stanley (2018-11-06): # The Metlakatla community in Alaska has decided not to change its # clock back an hour starting on November 4th, 2018 (day before yesterday). # They will be gmtoff=-28800 year-round. # https://www.facebook.com/141055983004923/photos/pb.141055983004923.-2207520000.1541465673./569081370202380/ # From Paul Eggert (2018-12-16): # In a 2018-12-11 special election, Metlakatla voted to go back to # Alaska time (including daylight saving time) starting next year. # https://www.krbd.org/2018/12/12/metlakatla-to-follow-alaska-standard-time-allow-liquor-sales/ # # From Ryan Stanley (2019-01-11): # The community will be changing back on the 20th of this month... # From Tim Parenti (2019-01-11): # Per an announcement on the Metlakatla community's official Facebook page, the # "fall back" will be on Sunday 2019-01-20 at 02:00: # https://www.facebook.com/141055983004923/photos/607150969728753/ # So they won't be waiting for Alaska to join them on 2019-03-10, but will # rather change their clocks twice in seven weeks. # From Paul Eggert (2023-01-23): # America/Adak is for the Aleutian Islands that are part of Alaska # and are west of 169.5° W. # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Juneau 15:02:19 - LMT 1867 Oct 19 15:33:32 -8:57:41 - LMT 1900 Aug 20 12:00 -8:00 - PST 1942 -8:00 US P%sT 1946 -8:00 - PST 1969 -8:00 US P%sT 1980 Apr 27 2:00 -9:00 US Y%sT 1980 Oct 26 2:00 -8:00 US P%sT 1983 Oct 30 2:00 -9:00 US Y%sT 1983 Nov 30 -9:00 US AK%sT Zone America/Sitka 14:58:47 - LMT 1867 Oct 19 15:30 -9:01:13 - LMT 1900 Aug 20 12:00 -8:00 - PST 1942 -8:00 US P%sT 1946 -8:00 - PST 1969 -8:00 US P%sT 1983 Oct 30 2:00 -9:00 US Y%sT 1983 Nov 30 -9:00 US AK%sT Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 19 15:44:55 -8:46:18 - LMT 1900 Aug 20 12:00 -8:00 - PST 1942 -8:00 US P%sT 1946 -8:00 - PST 1969 -8:00 US P%sT 1983 Oct 30 2:00 -8:00 - PST 2015 Nov 1 2:00 -9:00 US AK%sT 2018 Nov 4 2:00 -8:00 - PST 2019 Jan 20 2:00 -9:00 US AK%sT Zone America/Yakutat 14:41:05 - LMT 1867 Oct 19 15:12:18 -9:18:55 - LMT 1900 Aug 20 12:00 -9:00 - YST 1942 -9:00 US Y%sT 1946 -9:00 - YST 1969 -9:00 US Y%sT 1983 Nov 30 -9:00 US AK%sT Zone America/Anchorage 14:00:24 - LMT 1867 Oct 19 14:31:37 -9:59:36 - LMT 1900 Aug 20 12:00 -10:00 - AST 1942 -10:00 US A%sT 1967 Apr -10:00 - AHST 1969 -10:00 US AH%sT 1983 Oct 30 2:00 -9:00 US Y%sT 1983 Nov 30 -9:00 US AK%sT Zone America/Nome 12:58:22 - LMT 1867 Oct 19 13:29:35 -11:01:38 - LMT 1900 Aug 20 12:00 -11:00 - NST 1942 -11:00 US N%sT 1946 -11:00 - NST 1967 Apr -11:00 - BST 1969 -11:00 US B%sT 1983 Oct 30 2:00 -9:00 US Y%sT 1983 Nov 30 -9:00 US AK%sT Zone America/Adak 12:13:22 - LMT 1867 Oct 19 12:44:35 -11:46:38 - LMT 1900 Aug 20 12:00 -11:00 - NST 1942 -11:00 US N%sT 1946 -11:00 - NST 1967 Apr -11:00 - BST 1969 -11:00 US B%sT 1983 Oct 30 2:00 -10:00 US AH%sT 1983 Nov 30 -10:00 US H%sT # The following switches don't make our 1970 cutoff. # # Kiska observed Tokyo date and time during Japanese occupation from # 1942-06-06 to 1943-07-29, and similarly for Attu from 1942-06-07 to # 1943-05-29 (all dates American). Both islands are now uninhabited. # # Shanks writes that part of southwest Alaska (e.g. Aniak) # switched from -11:00 to -10:00 on 1968-09-22 at 02:00, # and another part (e.g. Akiak) made the same switch five weeks later. # # From David Flater (2004-11-09): # In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska # Historic Preservation Commission, provided this information, which # suggests that Unalaska deviated from statutory time from early 1967 # possibly until 1983: # # Minutes of the Unalaska City Council Meeting, January 10, 1967: # "Except for St. Paul and Akutan, Unalaska is the only important # location not on Alaska Standard Time. The following resolution was # made by William Robinson and seconded by Henry Swanson: Be it # resolved that the City of Unalaska hereby goes to Alaska Standard # Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, # January 14, Alaska Standard Time.) This resolution was passed with # three votes for and one against." # Hawaii # From Arthur David Olson (2010-12-09): # "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225 # of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09, # the article is available at # https://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf # and indicates that standard time was adopted effective noon, January # 13, 1896 (page 218), that in "1933, the Legislature decreed daylight # saving for the period between the last Sunday of each April and the # last Sunday of each September, but less than a month later repealed the # act," (page 220), that year-round daylight saving time was in effect # from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for # when clocks changed) and that clocks were changed by 30 minutes # effective the second Sunday of June, 1947 (page 219, with no time of # day given for when clocks changed). A footnote for the 1933 changes # cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933) # and Act 163 (approved 21 May 1933)." # From Arthur David Olson (2011-01-19): # The following is from "Laws of the Territory of Hawaii Passed by the # Seventeenth Legislature: Regular Session 1933," available (as of # 2011-01-19) at American University's Pence Law Library. Page 85: "Act # 90...At 2 o'clock ante meridian of the last Sunday in April of each # year, the standard time of this Territory shall be advanced one # hour...This Act shall take effect upon its approval. Approved this 26th # day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of # Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is # hereby repealed...This Act shall take effect upon its approval, upon # which date the standard time of this Territory shall be restored to # that existing immediately prior to the taking effect of said Act 90. # Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor # of the Territory of Hawaii." # # Note that 1933-05-21 was a Sunday. # We're left to guess the time of day when Act 163 was approved; guess noon. # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 -10:30 - HST 1933 Apr 30 2:00 -10:30 1:00 HDT 1933 May 21 12:00 -10:30 US H%sT 1947 Jun 8 2:00 -10:00 - HST # Now we turn to US areas that have diverged from the consensus since 1970. # Arizona mostly uses MST. # From Paul Eggert (2002-10-20): # # The information in the rest of this paragraph is derived from the # Daylight Saving Time web page # (2002-01-23) # maintained by the Arizona State Library, Archives and Public Records. # Between 1944-01-01 and 1944-04-01 the State of Arizona used standard # time, but by federal law railroads, airlines, bus lines, military # personnel, and some engaged in interstate commerce continued to # observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix # Gazette says that was the date the law changed, and that 04-01 was # the date the state's clocks would change. In 1945 the State of # Arizona used standard time all year, again with exceptions only as # mandated by federal law. Arizona observed DST in 1967, but Arizona # Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. # # Shanks says the 1944 experiment came to an end on 1944-03-17. # Go with the Arizona State Library instead. # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 19:00u -7:00 US M%sT 1944 Jan 1 0:01 -7:00 - MST 1944 Apr 1 0:01 -7:00 US M%sT 1944 Oct 1 0:01 -7:00 - MST 1967 -7:00 US M%sT 1968 Mar 21 -7:00 - MST # From Arthur David Olson (1988-02-13): # A writer from the Inter Tribal Council of Arizona, Inc., # notes in private correspondence dated 1987-12-28 that "Presently, only the # Navajo Nation participates in the Daylight Saving Time policy, due to its # large size and location in three states." (The "only" means that other # tribal nations don't use DST.) # # From Paul Eggert (2013-08-26): # See America/Denver for a zone appropriate for the Navajo Nation. # Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, # Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, # Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, # Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, # Teton, Twin Falls, Valley, Washington counties, and the southern # quarter of Idaho county) and eastern Oregon (most of Malheur County) # switched four weeks late in 1974. # # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Boise -7:44:49 - LMT 1883 Nov 18 20:00u -8:00 US P%sT 1923 May 13 2:00 -7:00 US M%sT 1974 -7:00 - MST 1974 Feb 3 2:00 -7:00 US M%sT # Indiana # # For a map of Indiana's time zone regions, see: # https://en.wikipedia.org/wiki/Time_in_Indiana # # From Paul Eggert (2018-11-30): # A brief but entertaining history of time in Indiana describes a 1949 debate # in the Indiana House where city legislators (who favored "fast time") # tussled with farm legislators (who didn't) over a bill to outlaw DST: # "Lacking enough votes, the city faction tries to filibuster until time runs # out on the session at midnight, but rural champion Rep. Herbert Copeland, # R-Madison, leans over the gallery railing and forces the official clock # back to 9 p.m., breaking it in the process. The clock sticks on 9 as the # debate rages on into the night. The filibuster finally dies out and the # bill passes, while outside the chamber, clocks read 3:30 a.m. In the end, # it doesn't matter which side won. The law has no enforcement powers and # is simply ignored by fast-time communities." # How Indiana went from 'God's time' to split zones and daylight-saving. # Indianapolis Star. 2018-11-27 14:58 -05. # https://www.indystar.com/story/news/politics/2018/11/27/indianapolis-indiana-time-zone-history-central-eastern-daylight-savings-time/2126300002/ # # From Paul Eggert (2007-08-17): # Since 1970, most of Indiana has been like America/Indiana/Indianapolis, # with the following exceptions: # # - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, # Vanderburgh, and Warrick counties have been like America/Chicago. # # - Dearborn and Ohio counties have been like America/New_York. # # - Clark, Floyd, and Harrison counties have been like # America/Kentucky/Louisville. # # - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, # and Switzerland counties have their own time zone histories as noted below. # # Shanks partitioned Indiana into 345 regions, each with its own time history, # and wrote "Even newspaper reports present contradictory information." # Those Hoosiers! Such a flighty and changeable people! # Fortunately, most of the complexity occurred before our cutoff date of 1970. # # Other than Indianapolis, the Indiana place names are so nondescript # that they would be ambiguous if we left them at the 'America' level. # So we reluctantly put them all in a subdirectory 'America/Indiana'. # From Paul Eggert (2014-06-26): # https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana # says "DOT is relocating the time zone boundary in Indiana to move Starke, # Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the # Eastern Time Zone to the Central Time Zone.... The effective date of # this rule is 2 a.m. EST Sunday, April 2, 2006, which is the # changeover date from standard time to Daylight Saving Time." # Strictly speaking, this meant the affected counties changed their # clocks twice that night, but this obviously was in error. The intent # was that 01:59:59 EST be followed by 02:00:00 CDT. # From Gwillim Law (2007-02-10): # The Associated Press has been reporting that Pulaski County, Indiana is # going to switch from Central to Eastern Time on March 11, 2007.... # http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL # Rule NAME FROM TO - IN ON AT SAVE LETTER Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 18:00u -6:00 US C%sT 1920 -6:00 Indianapolis C%sT 1942 -6:00 US C%sT 1946 -6:00 Indianapolis C%sT 1955 Apr 24 2:00 -5:00 - EST 1957 Sep 29 2:00 -6:00 - CST 1958 Apr 27 2:00 -5:00 - EST 1969 -5:00 US E%sT 1971 -5:00 - EST 2006 -5:00 US E%sT # # Eastern Crawford County, Indiana, left its clocks alone in 1974, # as well as from 1976 through 2005. # Rule NAME FROM TO - IN ON AT SAVE LETTER Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D Rule Marengo 1951 only - Sep lastSun 2:00 0 S Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 18:00u -6:00 US C%sT 1951 -6:00 Marengo C%sT 1961 Apr 30 2:00 -5:00 - EST 1969 -5:00 US E%sT 1974 Jan 6 2:00 -6:00 1:00 CDT 1974 Oct 27 2:00 -5:00 US E%sT 1976 -5:00 - EST 2006 -5:00 US E%sT # # Daviess, Dubois, Knox, and Martin Counties, Indiana, # switched from eastern to central time in April 2006, then switched back # in November 2007. # Rule NAME FROM TO - IN ON AT SAVE LETTER Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D Rule Vincennes 1946 only - Sep lastSun 2:00 0 S Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S Rule Vincennes 1955 only - May 1 0:00 1:00 D Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D Rule Vincennes 1960 only - Oct lastSun 2:00 0 S Rule Vincennes 1961 only - Sep lastSun 2:00 0 S Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 18:00u -6:00 US C%sT 1946 -6:00 Vincennes C%sT 1964 Apr 26 2:00 -5:00 - EST 1969 -5:00 US E%sT 1971 -5:00 - EST 2006 Apr 2 2:00 -6:00 US C%sT 2007 Nov 4 2:00 -5:00 US E%sT # # Perry County, Indiana, switched from eastern to central time in April 2006. # From Alois Treindl (2019-07-09): # The Indianapolis News, Friday 27 October 1967 states that Perry County # returned to CST. It went again to EST on 27 April 1969, as documented by the # Indianapolis star of Saturday 26 April. # Rule NAME FROM TO - IN ON AT SAVE LETTER Rule Perry 1955 only - May 1 0:00 1:00 D Rule Perry 1955 1960 - Sep lastSun 2:00 0 S Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D Rule Perry 1961 1963 - Oct lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 18:00u -6:00 US C%sT 1946 -6:00 Perry C%sT 1964 Apr 26 2:00 -5:00 - EST 1967 Oct 29 2:00 -6:00 US C%sT 1969 Apr 27 2:00 -5:00 US E%sT 1971 -5:00 - EST 2006 Apr 2 2:00 -6:00 US C%sT # # Pike County, Indiana moved from central to eastern time in 1977, # then switched back in 2006, then switched back again in 2007. # Rule NAME FROM TO - IN ON AT SAVE LETTER Rule Pike 1955 only - May 1 0:00 1:00 D Rule Pike 1955 1960 - Sep lastSun 2:00 0 S Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D Rule Pike 1961 1964 - Oct lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 18:00u -6:00 US C%sT 1955 -6:00 Pike C%sT 1965 Apr 25 2:00 -5:00 - EST 1966 Oct 30 2:00 -6:00 US C%sT 1977 Oct 30 2:00 -5:00 - EST 2006 Apr 2 2:00 -6:00 US C%sT 2007 Nov 4 2:00 -5:00 US E%sT # # Starke County, Indiana moved from central to eastern time in 1991, # then switched back in 2006. # From Arthur David Olson (1991-10-28): # An article on page A3 of the Sunday, 1991-10-27 Washington Post # notes that Starke County switched from Central time to Eastern time as of # 1991-10-27. # Rule NAME FROM TO - IN ON AT SAVE LETTER Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D Rule Starke 1947 1954 - Sep lastSun 2:00 0 S Rule Starke 1955 1956 - Oct lastSun 2:00 0 S Rule Starke 1957 1958 - Sep lastSun 2:00 0 S Rule Starke 1959 1961 - Oct lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 18:00u -6:00 US C%sT 1947 -6:00 Starke C%sT 1962 Apr 29 2:00 -5:00 - EST 1963 Oct 27 2:00 -6:00 US C%sT 1991 Oct 27 2:00 -5:00 - EST 2006 Apr 2 2:00 -6:00 US C%sT # # Pulaski County, Indiana, switched from eastern to central time in # April 2006 and then switched back in March 2007. # Rule NAME FROM TO - IN ON AT SAVE LETTER Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 18:00u -6:00 US C%sT 1946 -6:00 Pulaski C%sT 1961 Apr 30 2:00 -5:00 - EST 1969 -5:00 US E%sT 1971 -5:00 - EST 2006 Apr 2 2:00 -6:00 US C%sT 2007 Mar 11 2:00 -5:00 US E%sT # # Switzerland County, Indiana, did not observe DST from 1973 through 2005. # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 18:00u -6:00 US C%sT 1954 Apr 25 2:00 -5:00 - EST 1969 -5:00 US E%sT 1973 -5:00 - EST 2006 -5:00 US E%sT # From Paul Eggert (2018-03-20): # The Louisville & Nashville Railroad's 1883-11-18 change occurred at # 10:00 old local time; train were supposed to come to a standstill # for precisely 18 minutes. See Bartky Fig. 1 (page 50). It is not # clear how this matched civil time in Louisville, so for now continue # to assume Louisville switched at noon new local time, like New York. # # From Michael Deckers (2019-08-06): # From the contemporary source given by Alois Treindl, # the switch in Louisville on 1946-04-28 was on 00:01 # From Paul Eggert (2019-08-26): # That source was the Louisville Courier-Journal, 1946-04-27, p 4. # Shanks gives 02:00 for all 20th-century transition times in Louisville. # Evidently this is wrong for spring 1946. Although also likely wrong # for other dates, we have no data. # # Part of Kentucky left its clocks alone in 1974. # This also includes Clark, Floyd, and Harrison counties in Indiana. # Rule NAME FROM TO - IN ON AT SAVE LETTER Rule Louisville 1921 only - May 1 2:00 1:00 D Rule Louisville 1921 only - Sep 1 2:00 0 S Rule Louisville 1941 only - Apr lastSun 2:00 1:00 D Rule Louisville 1941 only - Sep lastSun 2:00 0 S Rule Louisville 1946 only - Apr lastSun 0:01 1:00 D Rule Louisville 1946 only - Jun 2 2:00 0 S Rule Louisville 1950 1961 - Apr lastSun 2:00 1:00 D Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S Rule Louisville 1956 1961 - Oct lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 18:00u -6:00 US C%sT 1921 -6:00 Louisville C%sT 1942 -6:00 US C%sT 1946 -6:00 Louisville C%sT 1961 Jul 23 2:00 -5:00 - EST 1968 -5:00 US E%sT 1974 Jan 6 2:00 -6:00 1:00 CDT 1974 Oct 27 2:00 -5:00 US E%sT # # Wayne County, Kentucky # # From Lake Cumberland LIFE # http://www.lake-cumberland.com/life/archive/news990129time.shtml # (1999-01-29) via WKYM-101.7: # Clinton County has joined Wayne County in asking the DoT to change from # the Central to the Eastern time zone.... The Wayne County government made # the same request in December. And while Russell County officials have not # taken action, the majority of respondents to a poll conducted there in # August indicated they would like to change to "fast time" also. # The three Lake Cumberland counties are the farthest east of any U.S. # location in the Central time zone. # # From Rich Wales (2000-08-29): # After prolonged debate, and despite continuing deep differences of opinion, # Wayne County (central Kentucky) is switching from Central (-0600) to Eastern # (-0500) time. They won't "fall back" this year. See Sara Shipley, # The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). # # From Paul Eggert (2001-07-16): # The final rule was published in the # Federal Register 65, 160 (2000-08-17), pp 50154-50158. # https://www.gpo.gov/fdsys/pkg/FR-2000-08-17/html/00-20854.htm # Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 18:00u -6:00 US C%sT 1946 -6:00 - CST 1968 -6:00 US C%sT 2000 Oct 29 2:00 -5:00 US E%sT # From Rives McDow (2000-08-30): # Here ... are all the changes in the US since 1985. # Kearny County, KS (put all of county on central; # previously split between MST and CST) ... 1990-10 # Starke County, IN (from CST to EST) ... 1991-10 # Oliver County, ND (from MST to CST) ... 1992-10 # West Wendover, NV (from PST TO MST) ... 1999-10 # Wayne County, KY (from CST to EST) ... 2000-10 # # From Paul Eggert (2001-07-17): # We don't know where the line used to be within Kearny County, KS, # so omit that change for now. # See America/Indiana/Knox for the Starke County, IN change. # See America/North_Dakota/Center for the Oliver County, ND change. # West Wendover, NV officially switched from Pacific to mountain time on # 1999-10-31. See the # Federal Register 64, 203 (1999-10-21), pp 56705-56707. # https://www.gpo.gov/fdsys/pkg/FR-1999-10-21/html/99-27240.htm # However, the Federal Register says that West Wendover already operated # on mountain time, and the rule merely made this official; # hence a separate tz entry is not needed. # Michigan # # From Bob Devine (1988-01-28): # Michigan didn't observe DST from 1968 to 1973. # # From Paul Eggert (1999-03-31): # Shanks writes that Michigan started using standard time on 1885-09-18, # but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) # that Detroit kept # # local time until 1900 when the City Council decreed that clocks should # be put back twenty-eight minutes to Central Standard Time. Half the # city obeyed, half refused. After considerable debate, the decision # was rescinded and the city reverted to Sun time. A derisive offer to # erect a sundial in front of the city hall was referred to the # Committee on Sewers. Then, in 1905, Central time was adopted # by city vote. # # This story is too entertaining to be false, so go with Howse over Shanks. # # From Paul Eggert (2001-03-06): # Garland (1927) writes "Cleveland and Detroit advanced their clocks # one hour in 1914." This change is not in Shanks. We have no more # info, so omit this for now. # # From Paul Eggert (2019-07-06): # Due to a complicated set of legal maneuvers, in 1967 Michigan did # not start daylight saving time when the rest of the US did. # Instead, it began DST on Jun 14 at 00:01. This was big news: # the Detroit Free Press reported it at the top of Page 1 on # 1967-06-14, in an article "State Adjusting to Switch to Fast Time" # by Gary Blonston, above an article about Thurgood Marshall's # confirmation to the US Supreme Court. Although Shanks says Detroit # observed DST until 1967-10-29 00:01, that time of day seems to be # incorrect, as the Free Press later said DST ended in Michigan at the # same time as the rest of the US. Also, although Shanks reports no DST in # Detroit in 1968, it did observe DST that year; in the November 1968 # election Michigan voters narrowly repealed DST, effective 1969. # # Most of Michigan observed DST from 1973 on, but was a bit late in 1975. # Rule NAME FROM TO - IN ON AT SAVE LETTER Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D Rule Detroit 1948 only - Sep lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Detroit -5:32:11 - LMT 1905 -6:00 - CST 1915 May 15 2:00 -5:00 - EST 1942 -5:00 US E%sT 1946 -5:00 Detroit E%sT 1967 Jun 14 0:01 -5:00 US E%sT 1969 -5:00 - EST 1973 -5:00 US E%sT 1975 -5:00 - EST 1975 Apr 27 2:00 -5:00 US E%sT # # Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, # switched from EST to CST/CDT in 1973. # Rule NAME FROM TO - IN ON AT SAVE LETTER Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D Rule Menominee 1946 only - Sep lastSun 2:00 0 S Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D Rule Menominee 1966 only - Oct lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 -6:00 US C%sT 1946 -6:00 Menominee C%sT 1969 Apr 27 2:00 -5:00 - EST 1973 Apr 29 2:00 -6:00 US C%sT # Navassa # administered by the US Fish and Wildlife Service # claimed by US under the provisions of the 1856 Guano Islands Act # also claimed by Haiti # occupied 1857/1900 by the Navassa Phosphate Co # US lighthouse 1917/1996-09 # currently uninhabited # see Mark Fineman, "An Isle Rich in Guano and Discord", # _Los Angeles Times_ (1998-11-10), A1, A10; it cites # Jimmy Skaggs, _The Great Guano Rush_ (1994). # From Rob van Gent (2025-07-23): # Another useful source for historical time zone information appears to be # a series of circulars with the title "Standard Time Throughout the World" # issued between 1925 and 1950 by the U.S. Bureau of Standards. # I found the following issues online: # https://nvlpubs.nist.gov/nistpubs/Legacy/circ/nbscircular280.pdf (1925) # https://nvlpubs.nist.gov/nistpubs/Legacy/circ/nbscircular399.pdf (1932) # https://nvlpubs.nist.gov/nistpubs/Legacy/circ/nbscircular406.pdf (1935) # https://nvlpubs.nist.gov/nistpubs/Legacy/circ/nbscircular496.pdf (1950) ################################################################################ # From Paul Eggert (2017-02-10): # # Unless otherwise specified, the source for data through 1990 is: # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), # San Diego: ACS Publications, Inc. (2003). # Unfortunately this book contains many errors and cites no sources. # # Many years ago Gwillim Law wrote that a good source # for time zone data was the International Air Transport # Association's Standard Schedules Information Manual (IATA SSIM), # published semiannually. Law sent in several helpful summaries # of the IATA's data after 1990. Except where otherwise noted, # IATA SSIM is the source for entries after 1990. # # Other sources occasionally used include: # # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 # . # # Pearce C. The Great Daylight Saving Time Controversy. # Australian Ebook Publisher. 2017. ISBN 978-1-925516-96-8. # # Edward W. Whitman, World Time Differences, # Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), # which I found in the UCLA library. # # William Willett, The Waste of Daylight, 19th edition # # [PDF] (1914-03) # # For the 1911/1912 establishment of standard time in French possessions, see: # Société Française de Physique, Recueil de constantes physiques (1913), # page 752, 18b. # # See the 'europe' file for Greenland. # Canada # From Alain LaBonté (1994-11-14): # I post here the time zone abbreviations standardized in Canada # for both English and French in the CAN/CSA-Z234.4-89 standard.... # # UTC Standard time Daylight saving time # offset French English French English # -2:30 - - HAT NDT # -3 - - HAA ADT # -3:30 HNT NST - - # -4 HNA AST HAE EDT # -5 HNE EST HAC CDT # -6 HNC CST HAR MDT # -7 HNR MST HAP PDT # -8 HNP PST HAY YDT # -9 HNY YST - - # # HN: Heure Normale ST: Standard Time # HA: Heure Avancée DT: Daylight saving Time # # A: de l'Atlantique Atlantic # C: du Centre Central # E: de l'Est Eastern # M: Mountain # N: Newfoundland # P: du Pacifique Pacific # R: des Rocheuses # T: de Terre-Neuve # Y: du Yukon Yukon # # From Paul Eggert (1994-11-22): # Alas, this sort of thing must be handled by localization software. # Unless otherwise specified, the data entries for Canada are all from Shanks # & Pottenger. # From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, # 2007-03-01): # The British Columbia government announced yesterday that it will # adjust daylight savings next year to align with changes in the # U.S. and the rest of Canada.... # https://archive.news.gov.bc.ca/releases/news_releases_2005-2009/2006AG0014-000330.htm # ... # Nova Scotia # Daylight saving time will be extended by four weeks starting in 2007.... # https://www.novascotia.ca/just/regulations/rg2/2006/ma1206.pdf # # [For New Brunswick] the new legislation dictates that the time change is to # be done at 02:00 instead of 00:01. # https://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf # ... # Manitoba has traditionally changed the clock every fall at 03:00. # As of 2006, the transition is to take place one hour earlier at 02:00. # https://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php # ... # [Alberta, Ontario, Quebec] will follow US rules. # http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM # http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm # http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF # ... # P.E.I. will follow US rules.... # http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf # ... # Province of Newfoundland and Labrador.... # http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm # ... # Yukon # https://www.gov.yk.ca/legislation/regs/oic2006_127.pdf # ... # N.W.T. will follow US rules. Whoever maintains the government web site # does not seem to believe in bookmarks. To see the news release, click the # following link and search for "Daylight Savings Time Change". Press the # "Daylight Savings Time Change" link; it will fire off a popup using # JavaScript. # http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive # ... # Nunavut # An amendment to the Interpretation Act was registered on February 19/2007.... # http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf # From Paul Eggert (2014-10-18): # H. David Matthews and Mary Vincent's map # "It's about TIME", _Canadian Geographic_ (September-October 1998) # https://web.archive.org/web/19990827055050/https://canadiangeographic.ca/SO98/geomap.htm # contains detailed boundaries for regions observing nonstandard # time and daylight saving time arrangements in Canada circa 1998. # # National Research Council Canada maintains info about time zones and DST. # https://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html # https://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5 # Its unofficial information is often taken from Matthews and Vincent. # From Paul Eggert (2006-06-27): # For now, assume all of DST-observing Canada will fall into line with the # new US DST rules, # From Chris Walton (2011-12-01) # In the first of Tammy Hardwick's articles # http://www.ilovecreston.com/?p=articles&t=spec&ar=260 # she quotes the Friday November 1/1918 edition of the Creston Review. # The quote includes these two statements: # 'Sunday the CPR went back to the old system of time...' # '... The daylight saving scheme was dropped all over Canada at the same time,' # These statements refer to a transition from daylight time to standard time # that occurred nationally on Sunday October 27/1918. This transition was # also documented in the Saturday October 26/1918 edition of the Toronto Star. # In light of that evidence, we alter the date from the earlier believed # Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day # than Thursday) in all Canadian rulesets. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Canada 1918 only - Apr 14 2:00 1:00 D Rule Canada 1918 only - Oct 27 2:00 0 S Rule Canada 1942 only - Feb 9 2:00 1:00 W # War Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace Rule Canada 1945 only - Sep 30 2:00 0 S Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D Rule Canada 1974 2006 - Oct lastSun 2:00 0 S Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D Rule Canada 2007 max - Nov Sun>=1 2:00 0 S # Newfoundland and Labrador # From Paul Eggert (2017-10-14): # Legally Labrador should observe Newfoundland time; see: # McLeod J. Labrador time - legal or not? St. John's Telegram, 2017-10-07 # http://www.thetelegram.com/news/local/labrador-time--legal-or-not-154860/ # Matthews and Vincent (1998) write that the only part of Labrador # that follows the rules is the southeast corner, including Port Hope # Simpson and Mary's Harbour, but excluding, say, Black Tickle. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule StJohns 1917 only - Apr 8 2:00 1:00 D Rule StJohns 1917 only - Sep 17 2:00 0 S # Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. Rule StJohns 1919 only - May 5 23:00 1:00 D Rule StJohns 1919 only - Aug 12 23:00 0 S # For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S # For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & # Pottenger. Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S # Whitman gives the following transitions: # 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 # but go with Shanks & Pottenger and assume they used Canadian rules. # For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives # Apr 30 - Sep 24; go with Shanks & Pottenger. Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S # From Paul Eggert (2000-10-02): # INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches # at 00:01 local time. For now, assume it started in 1987. # From Michael Pelley (2011-09-12): # We received today, Monday, September 12, 2011, notification that the # changes to the Newfoundland Standard Time Act have been proclaimed. # The change in the Act stipulates that the change from Daylight Savings # Time to Standard Time and from Standard Time to Daylight Savings Time # now occurs at 2:00AM. # ... # http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm # ... # MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery # Office of the Chief Information Officer # Executive Council # Government of Newfoundland & Labrador Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D Rule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D Rule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S # # St John's has an apostrophe, but POSIX file names can't have apostrophes. # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/St_Johns -3:30:52 - LMT 1884 -3:30:52 StJohns N%sT 1918 -3:30:52 Canada N%sT 1919 -3:30:52 StJohns N%sT 1935 Mar 30 -3:30 StJohns N%sT 1942 May 11 -3:30 Canada N%sT 1946 -3:30 StJohns N%sT 2011 Nov -3:30 Canada N%sT # most of east Labrador # The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'. # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay -3:30:52 - NST 1918 -3:30:52 Canada N%sT 1919 -3:30:52 - NST 1935 Mar 30 -3:30 - NST 1936 -3:30 StJohns N%sT 1942 May 11 -3:30 Canada N%sT 1946 -3:30 StJohns N%sT 1966 Mar 15 2:00 -4:00 StJohns A%sT 2011 Nov -4:00 Canada A%sT # west Labrador, Nova Scotia, Prince Edward I, # Îles-de-la-Madeleine, Listuguj reserve # From Brian Inglis (2015-07-20): # From the historical weather station records available at: # https://weatherspark.com/history/28351/1971/Sydney-Nova-Scotia-Canada # Sydney shares the same time history as Glace Bay, so was # likely to be the same across the island.... # Sydney, as the capital and most populous location, or Cape Breton, would # have been better names for the zone had we known this in 1996. # From Paul Eggert (2015-07-20): # Shanks & Pottenger write that since 1970 most of this region has been like # Halifax. Many locales did not observe peacetime DST until 1972; # the Cape Breton area, represented by Glace Bay, is the largest we know of # (Glace Bay was perhaps not the best name choice but no point changing now). # Shanks & Pottenger also write that Liverpool, NS was the only town # in Canada to observe DST in 1971 but not 1970; for now we'll assume # this is a typo. # From Jeffery Nichols (2020-01-09): # America/Halifax ... also applies to Îles-de-la-Madeleine and the Listuguj # reserve in Quebec. Officially, this came into effect on January 1, 2007 # (Legal Time Act, CQLR c T-5.1), but the legislative debates surrounding that # bill say that it is "accommodating the customs and practices" of those # regions, which suggests that they have always been in-line with Halifax. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Halifax 1916 only - Apr 1 0:00 1:00 D Rule Halifax 1916 only - Oct 1 0:00 0 S Rule Halifax 1920 only - May 9 0:00 1:00 D Rule Halifax 1920 only - Aug 29 0:00 0 S Rule Halifax 1921 only - May 6 0:00 1:00 D Rule Halifax 1921 1922 - Sep 5 0:00 0 S Rule Halifax 1922 only - Apr 30 0:00 1:00 D Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D Rule Halifax 1923 only - Sep 4 0:00 0 S Rule Halifax 1924 only - Sep 15 0:00 0 S Rule Halifax 1925 only - Sep 28 0:00 0 S Rule Halifax 1926 only - May 16 0:00 1:00 D Rule Halifax 1926 only - Sep 13 0:00 0 S Rule Halifax 1927 only - May 1 0:00 1:00 D Rule Halifax 1927 only - Sep 26 0:00 0 S Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D Rule Halifax 1928 only - Sep 9 0:00 0 S Rule Halifax 1929 only - Sep 3 0:00 0 S Rule Halifax 1930 only - Sep 15 0:00 0 S Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S Rule Halifax 1932 only - May 1 0:00 1:00 D Rule Halifax 1933 only - Apr 30 0:00 1:00 D Rule Halifax 1933 only - Oct 2 0:00 0 S Rule Halifax 1934 only - May 20 0:00 1:00 D Rule Halifax 1934 only - Sep 16 0:00 0 S Rule Halifax 1935 only - Jun 2 0:00 1:00 D Rule Halifax 1935 only - Sep 30 0:00 0 S Rule Halifax 1936 only - Jun 1 0:00 1:00 D Rule Halifax 1936 only - Sep 14 0:00 0 S Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S Rule Halifax 1939 only - May 28 0:00 1:00 D Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Halifax -4:14:24 - LMT 1902 Jun 15 -4:00 Halifax A%sT 1918 -4:00 Canada A%sT 1919 -4:00 Halifax A%sT 1942 Feb 9 2:00s -4:00 Canada A%sT 1946 -4:00 Halifax A%sT 1974 -4:00 Canada A%sT Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 -4:00 Canada A%sT 1953 -4:00 Halifax A%sT 1954 -4:00 - AST 1972 -4:00 Halifax A%sT 1974 -4:00 Canada A%sT # New Brunswick # From Paul Eggert (2007-01-31): # The Time Definition Act # says they changed at 00:01 through 2006, and # makes it # clear that this was the case since at least 1993. # For now, assume it started in 1993. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S Rule Moncton 1939 only - May 27 1:00 1:00 D Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S Rule Moncton 1940 only - May 19 1:00 1:00 D Rule Moncton 1941 only - May 4 1:00 1:00 D Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Moncton -4:19:08 - LMT 1883 Dec 9 -5:00 - EST 1902 Jun 15 -4:00 Canada A%sT 1933 -4:00 Moncton A%sT 1942 -4:00 Canada A%sT 1946 -4:00 Moncton A%sT 1973 -4:00 Canada A%sT 1993 -4:00 Moncton A%sT 2007 -4:00 Canada A%sT # Quebec # From Paul Eggert (2020-01-10): # See America/Toronto for most of Quebec, including Montreal. # See America/Halifax for the Îles de la Madeleine and the Listuguj reserve. # See America/Puerto_Rico for east of Natashquan. # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Blanc-Sablon -3:48:28 - LMT 1884 -4:00 Canada A%sT 1970 -4:00 - AST # Ontario # From Mark Brader (2003-07-26): # [According to the Toronto Star] Orillia, Ontario, adopted DST # effective Saturday, 1912-06-22, 22:00; the article mentions that # Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw # have already done so. In Orillia DST was to run until Saturday, # 1912-08-31 (no time mentioned), but it was met with considerable # hostility from certain segments of the public, and was revoked after # only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but # presumably that should be -07-06. (1912-06-19, -07-12; also letters # earlier in June). # # Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). # # From Paul Eggert (2017-07-08): # For more on Orillia, see: Daubs K. Bold attempt at daylight saving # time became a comic failure in Orillia. Toronto Star 2017-07-08. # https://www.thestar.com/news/insight/2017/07/08/bold-attempt-at-daylight-saving-time-became-a-comic-failure-in-orillia.html # From Paul Eggert (2025-03-20): # Also see the 1912-06-17 front page of The Evening Sunbeam, # reproduced in: Richardson M. "Daylight saving was a confusing # time in Orillia" in the 2025-03-15 Orillia Matters. Richardson writes, # "The first Sunday after the switch was made, [DST proponent and # Orillia mayor William Sword] Frost walked into church an hour late. # This became a symbol of the downfall of daylight saving in Orillia." # The mayor became known as "Daylight Bill". # https://www.orilliamatters.com/local-news/column-daylight-saving-was-a-confusing-time-in-orillia-10377529 # From Mark Brader (2010-03-06): # # In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom # right corner of page 1, it says that Toronto will return to standard # time at 2 am Sunday morning (which agrees with the database), and that: # # The one-hour setback will go into effect throughout most of Ontario, # except in areas like Windsor which remains on standard time all year. # # ... I don't know if Windsor began observing DST when Detroit did, # or in 1974, or on some other date. # # By the way, the article continues by noting that: # # Some cities in the United States have pushed the deadline back # three weeks and will change over from daylight saving in October. # From Chris Walton (2024-01-09): # The [Toronto] changes in 1947, 1948, and 1949 took place at 2:00 a.m. local # time instead of midnight.... Toronto Daily Star - ... # April 2, 1947 - Page 39 ... April 7, 1948 - Page 13 ... # April 2, 1949 - Page 1 ... April 7, 1949 - Page 24 ... # November 25, 1949 - Page 52 ... April 21, 1950 - Page 14 ... # September 19, 1950 - Page 46 ... September 20, 1950 - Page 3 ... # November 24, 1950 - Page 21 # From Arthur David Olson (2010-07-17): # # "Standard Time and Time Zones in Canada" appeared in # The Journal of The Royal Astronomical Society of Canada, # volume 26, number 2 (February 1932) and, as of 2010-07-17, # was available at # http://adsabs.harvard.edu/full/1932JRASC..26...49S # # It includes the text below (starting on page 57): # # A list of the places in Canada using daylight saving time would # require yearly revision. From information kindly furnished by # the provincial governments and by the postmasters in many cities # and towns, it is found that the following places used daylight sav- # ing in 1930. The information for the province of Quebec is definite, # for the other provinces only approximate: # # Province Daylight saving time used # Prince Edward Island Not used. # Nova Scotia In Halifax only. # New Brunswick In St. John only. # Quebec In the following places: # Montreal Lachine # Quebec Mont-Royal # Lévis Iberville # St. Lambert Cap de la Madelèine # Verdun Loretteville # Westmount Richmond # Outremont St. Jérôme # Longueuil Greenfield Park # Arvida Waterloo # Chambly-Canton Beaulieu # Melbourne La Tuque # St. Théophile Buckingham # Ontario Used generally in the cities and towns along # the southerly part of the province. Not # used in the northwesterly part. # Manitoba Not used. # Saskatchewan In Regina only. # Alberta Not used. # British Columbia Not used. # # With some exceptions, the use of daylight saving may be said to be limited # to those cities and towns lying between Quebec city and Windsor, Ont. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Toronto 1919 only - Mar 30 23:30 1:00 D Rule Toronto 1919 only - Oct 26 0:00 0 S Rule Toronto 1920 only - May 2 2:00 1:00 D Rule Toronto 1920 only - Sep 26 0:00 0 S Rule Toronto 1921 only - May 15 2:00 1:00 D Rule Toronto 1921 only - Sep 15 2:00 0 S Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D # Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" # was meant. Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S Rule Toronto 1945 1948 - Sep lastSun 2:00 0 S Rule Toronto 1946 1973 - Apr lastSun 2:00 1:00 D Rule Toronto 1949 1950 - Nov lastSun 2:00 0 S Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S # Shanks & Pottenger say Toronto ended DST a week early in 1971, # namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this # is wrong, and that he had confirmed it by checking the 1971-10-30 # Toronto Star, which said that DST was ending 1971-10-31 as usual. Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Toronto -5:17:32 - LMT 1895 -5:00 Canada E%sT 1919 -5:00 Toronto E%sT 1942 Feb 9 2:00s -5:00 Canada E%sT 1946 -5:00 Toronto E%sT 1974 -5:00 Canada E%sT # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Atikokan -6:06:28 - LMT 1895 -6:00 Canada C%sT 1940 Sep 29 -6:00 1:00 CDT 1942 Feb 9 2:00s -6:00 Canada C%sT 1945 Sep 30 2:00 -5:00 - EST #PACKRATLIST zone.tab Link America/Atikokan America/Coral_Harbour # Manitoba # From Rob Douglas (2006-04-06): # the old Manitoba Time Act - as amended by Bill 2, assented to # March 27, 1987 ... said ... # "between two o'clock Central Standard Time in the morning of # the first Sunday of April of each year and two o'clock Central # Standard Time in the morning of the last Sunday of October next # following, one hour in advance of Central Standard Time."... # I believe that the English legislation [of the old time act] had # been assented to (March 22, 1967).... # Also, as far as I can tell, there was no order-in-council varying # the time of Daylight Saving Time for 2005 and so the provisions of # the 1987 version would apply - the changeover was at 2:00 Central # Standard Time (i.e. not until 3:00 Central Daylight Time). # From Paul Eggert (2006-04-10): # Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) # starting 1966. Since 02:00s is clearly correct for 1967 on, assume # it was also 02:00s in 1966. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Winn 1916 only - Apr 23 0:00 1:00 D Rule Winn 1916 only - Sep 17 0:00 0 S Rule Winn 1918 only - Apr 14 2:00 1:00 D Rule Winn 1918 only - Oct 27 2:00 0 S Rule Winn 1937 only - May 16 2:00 1:00 D Rule Winn 1937 only - Sep 26 2:00 0 S Rule Winn 1942 only - Feb 9 2:00 1:00 W # War Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace Rule Winn 1945 only - Sep lastSun 2:00 0 S Rule Winn 1946 only - May 12 2:00 1:00 D Rule Winn 1946 only - Oct 13 2:00 0 S Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D Rule Winn 1947 1949 - Sep lastSun 2:00 0 S Rule Winn 1950 only - May 1 2:00 1:00 D Rule Winn 1950 only - Sep 30 2:00 0 S Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D Rule Winn 1951 1958 - Sep lastSun 2:00 0 S Rule Winn 1959 only - Oct lastSun 2:00 0 S Rule Winn 1960 only - Sep lastSun 2:00 0 S Rule Winn 1963 only - Apr lastSun 2:00 1:00 D Rule Winn 1963 only - Sep 22 2:00 0 S Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 -6:00 Winn C%sT 2006 -6:00 Canada C%sT # Saskatchewan # From Mark Brader (2003-07-26): # The first actual adoption of DST in Canada was at the municipal # level. As the [Toronto] Star put it (1912-06-07), "While people # elsewhere have long been talking of legislation to save daylight, # the city of Moose Jaw [Saskatchewan] has acted on its own hook." # DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: # presumably late evening, as below), and would run until "the end of # the summer". The discrepancy between municipal time and railroad # time was noted. # From Paul Eggert (2003-07-27): # Willett (1914-03) notes that DST "has been in operation ... in the # City of Moose Jaw, Saskatchewan, for one year." # From Paul Eggert (2019-07-25): # Pearce's book says Regina observed DST in 1914-1917. No dates and times, # unfortunately. It also says that in 1914 Saskatoon observed DST # from 1 June to 6 July, and that DST was also tried out in Davidson, # Melfort, and Prince Albert. # From Paul Eggert (2006-03-22): # Shanks & Pottenger say that since 1970 this region has mostly been as Regina. # Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. # Other western towns (e.g. Lloydminster) are like Edmonton. # Matthews and Vincent (1998) write that Denare Beach and Creighton # are like Winnipeg, in violation of Saskatchewan law. # From W. Jones (1992-11-06): # The. . .below is based on information I got from our law library, the # provincial archives, and the provincial Community Services department. # A precise history would require digging through newspaper archives, and # since you didn't say what you wanted, I didn't bother. # # Saskatchewan is split by a time zone meridian (105W) and over the years # the boundary became pretty ragged as communities near it reevaluated # their affiliations in one direction or the other. In 1965 a provincial # referendum favoured legislating common time practices. # # On 15 April 1966 the Time Act (c. T-14, Revised Statutes of # Saskatchewan 1978) was proclaimed, and established that the eastern # part of Saskatchewan would use CST year round, that districts in # northwest Saskatchewan would by default follow CST but could opt to # follow Mountain Time rules (thus 1 hour difference in the winter and # zero in the summer), and that districts in southwest Saskatchewan would # by default follow MT but could opt to follow CST. # # It took a few years for the dust to settle (I know one story of a town # on one time zone having its school in another, such that a mom had to # serve her family lunch in two shifts), but presently it seems that only # a few towns on the border with Alberta (e.g. Lloydminster) follow MT # rules any more; all other districts appear to have used CST year round # since sometime in the 1960s. # From Chris Walton (2006-06-26): # The Saskatchewan time act which was last updated in 1996 is about 30 pages # long and rather painful to read. # http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Regina 1918 only - Apr 14 2:00 1:00 D Rule Regina 1918 only - Oct 27 2:00 0 S Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D Rule Regina 1937 only - Oct Sun>=8 0:00 0 S Rule Regina 1938 only - Oct Sun>=1 0:00 0 S Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S Rule Regina 1942 only - Feb 9 2:00 1:00 W # War Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace Rule Regina 1945 only - Sep lastSun 2:00 0 S Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D Rule Regina 1946 only - Oct Sun>=8 2:00 0 S Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D Rule Regina 1947 1957 - Sep lastSun 2:00 0 S Rule Regina 1959 only - Apr lastSun 2:00 1:00 D Rule Regina 1959 only - Oct lastSun 2:00 0 S # Rule Swift 1957 only - Apr lastSun 2:00 1:00 D Rule Swift 1957 only - Oct lastSun 2:00 0 S Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D Rule Swift 1959 only - Oct lastSun 2:00 0 S Rule Swift 1960 1961 - Sep lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Regina -6:58:36 - LMT 1905 Sep -7:00 Regina M%sT 1960 Apr lastSun 2:00 -6:00 - CST Zone America/Swift_Current -7:11:20 - LMT 1905 Sep -7:00 Canada M%sT 1946 Apr lastSun 2:00 -7:00 Regina M%sT 1950 -7:00 Swift M%sT 1972 Apr lastSun 2:00 -6:00 - CST # Alberta # From Alois Treindl (2019-07-19): # There was no DST in Alberta in 1967... Calgary Herald, 29 April 1967. # 1969, no DST, from Edmonton Journal 18 April 1969 # # From Paul Eggert (2019-07-25): # Pearce's book says that Alberta's 1948 Daylight Saving Act required # Mountain Standard Time without DST, and that "anyone who broke that law # could be fined up to $25 and costs". There seems to be no record of # anybody paying the fine. The law was not changed until an August 1971 # plebiscite reinstituted DST in 1972. This story is also mentioned in: # Boyer JP. Forcing Choice: The Risky Reward of Referendums. Dundum. 2017. # ISBN 978-1459739123. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D Rule Edm 1918 only - Oct 27 2:00 0 S Rule Edm 1919 only - May 27 2:00 0 S Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D Rule Edm 1920 only - Oct lastSun 2:00 0 S Rule Edm 1921 1923 - Sep lastSun 2:00 0 S Rule Edm 1942 only - Feb 9 2:00 1:00 W # War Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace Rule Edm 1945 only - Sep lastSun 2:00 0 S Rule Edm 1947 only - Apr lastSun 2:00 1:00 D Rule Edm 1947 only - Sep lastSun 2:00 0 S Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D Rule Edm 1972 2006 - Oct lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Edmonton -7:33:52 - LMT 1906 Sep -7:00 Edm M%sT 1987 -7:00 Canada M%sT # British Columbia # From Paul Eggert (2006-03-22): # Shanks & Pottenger write that since 1970 most of this region has # been like Vancouver. # Dawson Creek uses MST. Much of east BC is like Edmonton. # From Matt Johnson (2015-09-21): # Fort Nelson, BC, Canada will cancel DST this year. So while previously they # were aligned with America/Vancouver, they're now aligned with # America/Dawson_Creek. # http://www.northernrockies.ca/EN/meta/news/archives/2015/northern-rockies-time-change.html # # From Tim Parenti (2015-09-23): # This requires a new zone for the Northern Rockies Regional Municipality, # America/Fort_Nelson. The resolution of 2014-12-08 was reached following a # 2014-11-15 poll with nearly 75% support. Effectively, the municipality has # been on MST (-0700) like Dawson Creek since it advanced its clocks on # 2015-03-08. # # From Paul Eggert (2019-07-25): # Shanks says Fort Nelson did not observe DST in 1946, unlike Vancouver. # Alois Treindl confirmed this on 07-22, citing the 1946-04-27 Vancouver Daily # Province. He also cited the 1946-09-28 Victoria Daily Times, which said # that Vancouver, Victoria, etc. "change at midnight Saturday"; for now, # guess they meant 02:00 Sunday since 02:00 was common practice in Vancouver. # # Early Vancouver, Volume Four, by Major J.S. Matthews, V.D., 2011 edition # says that a 1922 plebiscite adopted DST, but a 1923 plebiscite rejected it. # http://former.vancouver.ca/ctyclerk/archives/digitized/EarlyVan/SearchEarlyVan/Vol4pdf/MatthewsEarlyVancouverVol4_DaylightSavings.pdf # A catalog entry for a newspaper clipping seems to indicate that Vancouver # observed DST in 1941 from 07-07 through 09-27; see # https://searcharchives.vancouver.ca/daylight-saving-1918-starts-again-july-7-1941-start-d-s-sept-27-end-of-d-s-1941 # We have no further details, so omit them for now. # From Arthur David Olson (2026-03-02): # B. C. Gov News: “Adopting permanent daylight saving time: ‘Spring forward’ # on March 8 will be the last time change, ending twice-yearly clock changes.” # https://news.gov.bc.ca/releases/2026AG0013-000209 # # From Paul Eggert (2026-03-07): # The law says that 21 hours after the usual 2026-03-08 02:00 switch from # PST to PDT, the next day inaugurates the new standard time Pacific Time, # i.e., just one clock change but two name changes separated by 21 hours. # PT, the obvious abbreviation for Pacific Time, is one letter too short # to conform to TZDB’s (and POSIX’s) [-+[:alnum:]]{3,6} requirements. # I asked the BC government for advice, with no response. For now, do this: # 1. As a temporary hack, pretend that the BC law takes effect # not on 2026-03-09 at 00:00, but on 2026-11-01 at 02:00. # This pretense works around a limitation in CLDR v48.2 (2026-03-17), # which would otherwise say the interval uses “Pacific Standard Time”. # (Below, this temporary hack is marked “Temporary hack; see above.”) # Strictly speaking this hack is incorrect since the interval uses # standard time, but it does have the right UT offset and it # works around the CLDR limitation. We should be able to remove # the temporary hack after CLDR is fixed. # 2. After the BC law takes effect, model the time as MST sans DST. # We can change this later if another conforming non-numeric abbreviation # for Pacific Time becomes more popular. Possibilities include: # MST - the most compatible with existing software and practice, # and already used in parts of BC and in Yukon # PDT - almost as software-friendly, but confusing because it implies # it is DST and is paired with PST, whereas PT is standard time # PST - straightforward but even more confusing, # and will likely break much software that assumes PST is -08 # -07 - accurate and clear in itself, but makes BC look odd vs neighbors # CPT, CPST - for Canadian Pacific (Standard) Time, # by analogy with AEST in Australia # P-T - conforming approximation to “PT” # PT+ - like P-T but suggesting one-hour advance over PST # From Chris Walton (2026-03-15): # The Regional District of East Kootenay is planning to move to year-round # Mountain Standard Time (MST) on November 1, 2026.... # https://www.rdek.bc.ca/news/entry/rdek_board_moves_to_transition_to_year_round_mountain_standard_time # (2026-03-17): # The final decision East Kootenay made a few days ago may turn out not to # be final after all. They are going to reopen the debate next month! # https://www.cbc.ca/news/canada/british-columbia/what-time-is-it-in-the-east-kootenay-debate-9.7132624 # From Paul Eggert (2026-03-17): # Mayor Steve Fairbairn of Elkford asked the question be called a second time, # saying, “Pardon the pun, but this is not a time-sensitive issue.” # For now, merely mention the potential change in these comments. # If it happens it would likely affect clocks starting 2027-03-14 at 02:00. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Vanc 1918 only - Apr 14 2:00 1:00 D Rule Vanc 1918 only - Oct 27 2:00 0 S Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace Rule Vanc 1945 only - Sep 30 2:00 0 S Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D Rule Vanc 1946 only - Sep 29 2:00 0 S Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Vancouver -8:12:28 - LMT 1884 -8:00 Vanc P%sT 1987 -8:00 Canada P%sT 2026 Mar 9 # Temporary hack; see above. -8:00 1:00 PDT 2026 Nov 1 02:00 # End of temporary hack. -7:00 - MST Zone America/Dawson_Creek -8:00:56 - LMT 1884 -8:00 Canada P%sT 1947 -8:00 Vanc P%sT 1972 Aug 30 2:00 -7:00 - MST Zone America/Fort_Nelson -8:10:47 - LMT 1884 -8:00 Vanc P%sT 1946 -8:00 - PST 1947 -8:00 Vanc P%sT 1987 -8:00 Canada P%sT 2015 Mar 8 2:00 -7:00 - MST # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Creston -7:46:04 - LMT 1884 -7:00 - MST 1916 Oct 1 -8:00 - PST 1918 Jun 2 -7:00 - MST # Northwest Territories, Nunavut, Yukon # From Chris Walton (2022-11-06): # Whitehorse Star - Thursday April 22, 1965 - page 1 # title: DST Starts Monday ... # https://www.newspapers.com/image/578587481/ # The title of this first article is wrong and/or misleading. # Also, the start time shown in the article is vague; it simply says "after # midnight" when it probably should have stated 2:00a.m.... # # Whitehorse Star - Monday October 25, 1965 - page 15 ... # https://www.newspapers.com/image/578589147/ # The 1965 Yukon Council minutes can be found here: # http://assets.yukonarchives.ca/PER_YG_06_1965_C20_S02_v1.pdf # ... I do not currently believe that NWT touched any of its clocks in 1965.... # # Whitehorse Star - Thursday Feb 24,1966 - page 2 # title: It's Time for YDT ... # https://www.newspapers.com/image/578575979/ ... # America/Whitehorse as a permanent change from UTC-9(YST) to # UTC-8(PST) at 00:00 on Sunday February 27, 1966.... # # Whitehorse Star - Friday April 28,1972 - page 6 # title: Daylight Saving Time for N.W.T.... # https://www.newspapers.com/image/578701610/ ... # Nunavut and NWT zones ... DST starting in 1972.... Start and End ... # should be the same as the rest of Canada # # # From Paul Eggert (2022-11-06): # For now, assume Yukon's 1965-04-22 spring forward was 00:00 -> 02:00, as this # seems likely than 02:00 -> 04:00 and matches "after midnight". # From Paul Eggert (2006-03-22): # Dawson switched to PST in 1973. Inuvik switched to MST in 1979. # Mathew Englander (1996-10-07) gives the following refs: # * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, # c. 7 defines Yukon standard time as UTC-9.... # see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). # [https://www.canlii.org/en/ca/laws/stat/rsc-1985-c-i-21/latest/rsc-1985-c-i-21.html] # * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. # * O.I.C. 1980/02 established DST. # * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. # From Brian Inglis (2015-04-14): # # I tried to trace the history of Yukon time and found the following # regulations, giving the reference title and URL if found, regulation name, # and relevant quote if available. Each regulation specifically revokes its # predecessor. The final reference is to the current Interpretation Act # authorizing and resulting from these regulatory changes. # # Only recent regulations were retrievable via Yukon government site search or # index, and only some via Canadian legal sources. Other sources used include # articles titled "Standard Time and Time Zones in Canada" from JRASC via ADS # Abstracts, cited by ADO for 1932 ..., and updated versions from 1958 and # 1970 quoted below; each article includes current extracts from provincial # and territorial ST and DST regulations at the end, summaries and details of # standard times and daylight saving time at many locations across Canada, # with time zone maps, tables and calculations for Canadian Sunrise, Sunset, # and LMST; they also cover many countries and global locations, with a chart # and table showing current Universal Time offsets, and may be useful as # another source of information for 1970 and earlier. # # * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26, # pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS) # http://adsabs.harvard.edu/abs/1932JRASC..26...49S from p.75: # Yukon Interpretation Ordinance # Yukon standard time is the local mean time at the one hundred and # thirty-fifth meridian. # # * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.; # JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System # (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1: # Yukon Interpretation Ordinance, 1955, Chap. 16. # # (1) Subject to this section, standard time shall be reckoned as nine # hours behind Greenwich Time and called Yukon Standard Time. # # (2) Notwithstanding subsection (1), the Commissioner may make regulations # varying the manner of reckoning standard time. # # * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance # [no online source found] # # * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC, # Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS) # http://adsabs.harvard.edu/abs/1970JRASC..64..129T from p.156: Yukon # Territory Commissioner's Order 1967-59 Interpretation Ordinance ... # # 1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon # Territory on 27th January, 1966, is hereby revoked. # # 2. Yukon (East) Standard Time as defined by section 36 of the # Interpretation Ordinance from and after mid-night on the 28th day of May, # 1967 shall be reckoned in the same manner as Pacific Standard Time, that # is to say, eight hours behind Greenwich Time in the area of the Yukon # Territory lying east of the 138th degree longitude west. # # 3. In the remainder of the Territory, lying west of the 138th degree # longitude west, Yukon (West) Standard Time shall be reckoned as nine # hours behind Greenwich Time. # # * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214 # https://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html # C.O. 1973/214 INTERPRETATION ACT ... # # 1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby # revoked. # # 2. Yukon Standard Time as defined by section 36 of the Interpretation # Act from and after midnight on the twenty-eighth day of October, 1973 # shall be reckoned in the same manner as Pacific Standard Time, that is # to say eight hours behind Greenwich Time. # # * O.I.C. 1980/02 INTERPRETATION ACT # https://mm.icann.org/pipermail/tz/attachments/20201125/d5adc93b/CAYTOIC1980-02DST1980-01-04-0001.pdf # # * Yukon Daylight Saving Time, YOIC 1987/56 # https://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html # O.I.C. 1987/056 INTERPRETATION ACT ... # # In every year between # (a) two o'clock in the morning in the first Sunday in April, and # (b) two o'clock in the morning in the last Sunday in October, # Standard Time shall be reckoned as seven hours behind Greenwich Time and # called Yukon Daylight Saving Time. # ... # Dated ... 9th day of March, A.D., 1987. # # * Yukon Daylight Saving Time 2006, YOIC 2006/127 # https://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html # O.I.C. 2006/127 INTERPRETATION ACT ... # # 1. In Yukon each year the time for general purposes shall be 7 hours # behind Greenwich mean time during the period commencing at two o'clock # in the forenoon on the second Sunday of March and ending at two o'clock # in the forenoon on the first Sunday of November and shall be called # Yukon Daylight Saving Time. # # 2. Order-in-Council 1987/56 is revoked. # # 3. This order comes into force January 1, 2007. # # * Interpretation Act, RSY 2002, c 125 # https://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html # From Chris Walton (2022-11-06): # The 5th edition of the Atlas of Canada contains a time zone map that # shows both legislated and observed time zone boundaries. # All communities on Baffin Island are shown to be observing Eastern time. # The date on the map is 1984. # https://ftp.maps.canada.ca/pub/nrcan_rncan/raster/atlas_5_ed/eng/other/referencemaps/mcr4056.pdf # From Rives McDow (1999-09-04): # Nunavut ... moved ... to incorporate the whole territory into one time zone. # Nunavut moves to single time zone Oct. 31 # http://www.nunatsiaq.com/nunavut/nvt90903_13.html # From Paul Eggert (1999-09-20): # Basic Facts: The New Territory # http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html # (1999) reports that ... Coral Harbour does not observe DST. # From Paul Eggert (2000-10-02): # Matthews and Vincent (1998) say the following, but we lack histories # for these potential new Zones. # # The Canadian Forces station at Alert uses Eastern Time while the # handful of residents at the Eureka weather station [in the Central # zone] skip daylight savings. Baffin Island, which is crossed by the # Central, Eastern and Atlantic Time zones only uses Eastern Time. # Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of # Central Time and Southampton Island [in the Central zone] is not # required to use daylight savings. # From # Nunavut now has two time zones (2000-11-10): # The Nunavut government would allow its employees in Kugluktuk and # Cambridge Bay to operate on central time year-round, putting them # one hour behind the rest of Nunavut for six months during the winter. # At the end of October the two communities had rebelled against # Nunavut's unified time zone, refusing to shift to eastern time with # the rest of the territory for the winter. Cambridge Bay remained on # central time, while Kugluktuk, even farther west, reverted to # mountain time, which they had used before the advent of Nunavut's # unified time zone in 1999. # # From Rives McDow (2001-01-20), quoting the Nunavut government: # The preceding decision came into effect at midnight, Saturday Nov 4, 2000. # From Paul Eggert (2000-12-04): # Let's just keep track of the official times for now. # From Rives McDow (2001-03-07): # The premier of Nunavut has issued a ministerial statement advising # that effective 2001-04-01, the territory of Nunavut will revert # back to three time zones (mountain, central, and eastern). Of the # cities in Nunavut, Coral Harbor is the only one that I know of that # has said it will not observe dst, staying on EST year round. I'm # checking for more info, and will get back to you if I come up with # more. # [Also see (2001-03-09).] # From Gwillim Law (2005-05-21): # According to ... # http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp # (from a 1998 Canadian Geographic article), the de facto and de jure time # for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year # round. Using Google, it's easy to find other websites that confirm this. # I wasn't able to find how far back this time regimen goes, but since it # predates the creation of Nunavut, it probably goes back many years.... # The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. # # From Paul Eggert (2014-10-17): # For lack of better information, assume that Southampton Island observed # daylight saving only during wartime. Gwillim Law's email also # mentioned maps now maintained by National Research Council Canada; # see above for an up-to-date link. # From Chris Walton (2007-03-01): # ... the community of Resolute (located on Cornwallis Island in # Nunavut) moved from Central Time to Eastern Time last November. # Basically the community did not change its clocks at the end of # daylight saving.... # http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html # From Chris Walton (2011-03-21): # Back in 2007 I initiated the creation of a new "zone file" for Resolute # Bay. Resolute Bay is a small community located about 900km north of # the Arctic Circle. The zone file was required because Resolute Bay had # decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007. # # According to new information which I received last week, Resolute Bay # went back to using UTC-6 in the winter of 2007-2008... # # On March 11/2007 most of Canada went onto daylight saving. On March # 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I # talked to somebody that was both knowledgeable and helpful. I was able # to confirm that Resolute Bay was still operating on UTC-5. It was # explained to me that Resolute Bay had been on the Eastern Time zone # (EST) in the winter, and was now back on the Central Time zone (CDT). # i.e. the time zone had changed twice in the last year but the clocks # had not moved. The residents had to know which time zone they were in # so they could follow the correct TV schedule... # # On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I # phoned the Resolute Bay hamlet office...[D]ue to the challenging nature # of the phone call, I decided to seek out an alternate source of # information. I found an e-mail address for somebody by the name of # Stephanie Adams whose job was listed as "Inns North Support Officer for # Arctic Co-operatives." I was under the impression that Stephanie lived # and worked in Resolute Bay... # # On March 14/2011 I phoned the hamlet office again. I was told that # Resolute Bay had been using Central Standard Time over the winter of # 2010-2011 and that the clocks had therefore been moved one hour ahead # on March 13/2011. The person I talked to was aware that Resolute Bay # had previously experimented with Eastern Standard Time but he could not # tell me when the practice had stopped. # # On March 17/2011 I searched the Web to find an e-mail address of # somebody that might be able to tell me exactly when Resolute Bay went # off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz # used to be the mayor of Resolute Bay and he apparently owns half the # businesses including "South Camp Inn." This website has some info on # Aziz: # http://www.uphere.ca/node/493 # # I sent Aziz an e-mail asking when Resolute Bay had stopped using # Eastern Standard Time. # # Aziz responded quickly with this: "hi, The time was not changed for the # 1 year only, the following year, the community went back to the old way # of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in # the winter Zulu plus 6 hrs" # # This of course conflicted with everything I had ascertained in November 2008. # # I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz # responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You # may want to check with the weather office in Resolute Bay or do a # search on the weather through Env. Canada. web site" # # If I had realized the Stephanie did not live in Resolute Bay I would # never have contacted her. I now believe that all the information I # obtained in November 2008 should be ignored... # I apologize for reporting incorrect information in 2008. # From Tim Parenti (2020-03-05): # The government of Yukon announced [yesterday] the cessation of seasonal time # changes. "After clocks are pushed ahead one hour on March 8, the territory # will remain on [UTC-07]. ... [The government] found 93 per cent of # respondents wanted to end seasonal time changes and, of that group, 70 per # cent wanted 'permanent Pacific Daylight Saving Time.'" # https://www.cbc.ca/news/canada/north/yukon-end-daylight-saving-time-1.5486358 # # Although the government press release prefers PDT, we prefer MST for # consistency with nearby Dawson Creek, Creston, and Fort Nelson. # https://yukon.ca/en/news/yukon-end-seasonal-time-change # From Andrew G. Smith (2020-09-24): # Yukon has completed its regulatory change to be on UTC -7 year-round.... # http://www.gov.yk.ca/legislation/regs/oic2020_125.pdf # What we have done is re-defined Yukon Standard Time, as we are # authorized to do under section 33 of our Interpretation Act: # http://www.gov.yk.ca/legislation/acts/interpretation_c.pdf # # From Paul Eggert (2020-09-24): # tzdb uses the obsolete YST abbreviation for standard time in Yukon through # about 1970, and uses PST for standard time in Yukon since then. Consistent # with that, use MST for -07, the new standard time in Yukon effective Nov. 1. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule NT_YK 1918 only - Apr 14 2:00 1:00 D Rule NT_YK 1918 only - Oct 27 2:00 0 S Rule NT_YK 1919 only - May 25 2:00 1:00 D Rule NT_YK 1919 only - Nov 1 0:00 0 S Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace Rule NT_YK 1945 only - Sep 30 2:00 0 S Rule NT_YK 1972 1986 - Apr lastSun 2:00 1:00 D Rule NT_YK 1972 2006 - Oct lastSun 2:00 0 S Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D Rule Yukon 1965 only - Apr lastSun 0:00 2:00 DD Rule Yukon 1965 only - Oct lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] # formerly Frobisher Bay Zone America/Iqaluit 0 - -00 1942 Aug # Frobisher Bay est. -5:00 NT_YK E%sT 1999 Oct 31 2:00 -6:00 Canada C%sT 2000 Oct 29 2:00 -5:00 Canada E%sT # aka Qausuittuq Zone America/Resolute 0 - -00 1947 Aug 31 # Resolute founded -6:00 NT_YK C%sT 2000 Oct 29 2:00 -5:00 - EST 2001 Apr 1 3:00 -6:00 Canada C%sT 2006 Oct 29 2:00 -5:00 - EST 2007 Mar 11 3:00 -6:00 Canada C%sT # aka Kangiqiniq Zone America/Rankin_Inlet 0 - -00 1957 # Rankin Inlet founded -6:00 NT_YK C%sT 2000 Oct 29 2:00 -5:00 - EST 2001 Apr 1 3:00 -6:00 Canada C%sT # aka Iqaluktuuttiaq Zone America/Cambridge_Bay 0 - -00 1920 # trading post est.? -7:00 NT_YK M%sT 1999 Oct 31 2:00 -6:00 Canada C%sT 2000 Oct 29 2:00 -5:00 - EST 2000 Nov 5 0:00 -6:00 - CST 2001 Apr 1 3:00 -7:00 Canada M%sT Zone America/Inuvik 0 - -00 1953 # Inuvik founded -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 -7:00 NT_YK M%sT 1980 -7:00 Canada M%sT Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 -9:00 NT_YK Y%sT 1965 -9:00 Yukon Y%sT 1966 Feb 27 0:00 -8:00 - PST 1980 -8:00 Canada P%sT 2020 Nov 1 -7:00 - MST Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 -9:00 NT_YK Y%sT 1965 -9:00 Yukon Y%sT 1973 Oct 28 0:00 -8:00 - PST 1980 -8:00 Canada P%sT 2020 Nov 1 -7:00 - MST ############################################################################### # Mexico # From Paul Eggert (2014-12-07): # The Investigation and Analysis Service of the # Mexican Library of Congress (MLoC) has published a # history of Mexican local time (in Spanish) # http://www.diputados.gob.mx/bibliot/publica/inveyana/polisoc/horver/index.htm # # Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. # (In all cases we go with the MLoC.) # S&P report that Baja was at -8:00 in 1922/1923. # S&P say the 1930 transition in Baja was 1930-11-16. # S&P report no DST during summer 1931. # S&P report a transition at 1932-03-30 23:00, not 1932-04-01. # From Gwillim Law (2001-02-20): # There are some other discrepancies between the Decrees page and the # tz database. I think they can best be explained by supposing that # the researchers who prepared the Decrees page failed to find some of # the relevant documents. # From Heitor David Pinto (2024-08-04): # In 1931, the decree implementing DST specified that it would take # effect on 30 April.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=192270&pagina=2&seccion=1 # # In 1981, the decree changing Campeche, Yucatán and Quintana Roo to UTC-5 # specified that it would enter into force on 26 December 1981 at 2:00.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4705667&fecha=23/12/1981&cod_diario=202796 # # In 1982, the decree returning Campeche and Yucatán to UTC-6 specified that # it would enter into force on 2 November 1982 at 2:00.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=205689&pagina=3&seccion=0 # # Quintana Roo changed to UTC-6 on 4 January 1983 at 0:00, and again # to UTC-5 on 26 October 1997 at 2:00.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4787355&fecha=28/12/1982&cod_diario=206112 # https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=209559&pagina=15&seccion=0 # # Durango, Coahuila, Nuevo León and Tamaulipas were set to UTC-7 on 1 January # 1922, and changed to UTC-6 on 10 June 1927. Then Durango, Coahuila and # Nuevo León (but not Tamaulipas) returned to UTC-7 on 15 November 1930, # observed DST in 1931, and changed again to UTC-6 on 1 April 1932.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4441846&fecha=29/12/1921&cod_diario=187468 # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4541520&fecha=09/06/1927&cod_diario=193920 # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4491963&fecha=15/11/1930&cod_diario=190835 # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4418437&fecha=21/01/1932&cod_diario=185588 # # ... the ... 10 June 1927 ... decree only said 10 June 1927, without # specifying a time, so I suppose that it should be considered at 0:00. # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4541520&fecha=09/06/1927&cod_diario=193920 # # In 1942, the decree changing Baja California, Baja California Sur, Sonora, # Sinaloa and Nayarit to UTC-7 was published on 24 April, but it said that it # would apply from 1 April, so it's unclear when the change actually # occurred. The database currently shows 24 April 1942. # https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=192203&pagina=2&seccion=1 # # Baja California Sur, Sonora, Sinaloa and Nayarit never used UTC-8. The ... # 14 January 1949 ... change [to UTC-8] only occurred in Baja California. # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4515613&fecha=13/01/1949&cod_diario=192309 # # In 1945, the decree changing Baja California to UTC-8 specified that it # would take effect on the third day from its publication. # It was published on 12 November, so it would take effect on 15 November.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4555049&fecha=12/11/1945&cod_diario=194763 # # In 1948, the decree changing Baja California to UTC-7 specified that it # would take effect on "this date". The decree was made on 13 March, # but published on 5 April, so it's unclear when the change actually occurred. # The database currently shows 5 April 1948. # https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=188624&pagina=2&seccion=0 # # In 1949, the decree changing Baja California to UTC-8 was published on 13 # January, but it said that it would apply from 1 January, so it's unclear when # the change actually occurred. The database currently shows 14 January 1949. # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4515613&fecha=13/01/1949&cod_diario=192309 # # Baja California also observed UTC-7 from 1 May to 24 September 1950, # from 29 April to 30 September 1951 at 2:00, # and from 27 April to 28 September 1952 at 2:00.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4600403&fecha=29/04/1950&cod_diario=197505 # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4623553&fecha=23/09/1950&cod_diario=198805 # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4469444&fecha=27/04/1951&cod_diario=189317 # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4533868&fecha=10/03/1952&cod_diario=193465 # # All changes in Baja California from 1948 to 1952 match those in California, # on the same dates or with a difference of one day. # So it may be easier to implement these changes as DST with rule CA # during this whole period. # From Alois Treindl (2025-07-29): # I did a quick newspaper archive research on https://hndm.iib.unam.mx/ # and found that Periódico Oficial del Estado de Baja California Norte # (1973-04-20) states clearly that DST was observed from last Sunday # in April to last Sunday in October.... I have a few more data from the # official bulletin for DST begin or end in Baja California 1964 1967 1969 # 1972 1973 (already sent) 1974 1975 1976 I do not know whether it is safe to # assume that it also applied in the years where I did not yet find proof. # The 1974 end of DST contains a reference to an Acuerdo of 1973-dec-20 which # I could not find.... One might assume that Baja California, which followed # US-CA in all these other yours, did the same. # # From Paul Eggert (2025-08-04): # Assume that Tijuana agreed with San Diego from 1953 through 1996, # as this agrees with Alois Treindl's data and with Shanks. # For now, keep the slightly-different 1948/1952 history for Baja California, # as we have no information on whether 1948/1952 clocks in Tijuana followed # the decrees or followed San Diego. # From Mark Schapiro, writing in The Nation (2002-10-28): # https://www.thenation.com/article/archive/sowing-disaster/ # When Mexican clocks were turned back for daylight saving time in the spring, # the Zapotecs refused to make the adjustment, insisting that they live in # "God's time," not in what they derisively call "Fox time," referring to # President Vicente Fox in far-off Mexico City. # From Paul Eggert (2025-08-04): # Unfortunately we have no data to track this informal practice. # From Alan Perry (1996-02-15): # A guy from our Mexico subsidiary finally found the Presidential Decree # outlining the timezone changes in Mexico. # # ------------- Begin Forwarded Message ------------- # # I finally got my hands on the Official Presidential Decree that sets up the # rules for the DST changes. The rules are: # # 1. The country is divided in 3 timezones: # - Baja California Norte (the Mexico/BajaNorte TZ) # - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) # - The rest of the country (the Mexico/General TZ) # # 2. From the first Sunday in April at 2:00 AM to the last Sunday in October # at 2:00 AM, the times in each zone are as follows: # BajaNorte: GMT+7 # BajaSur: GMT+6 # General: GMT+5 # # 3. The rest of the year, the times are as follows: # BajaNorte: GMT+8 # BajaSur: GMT+7 # General: GMT+6 # # The Decree was published in Mexico's Official Newspaper on January 4th. # # -------------- End Forwarded Message -------------- # From Paul Eggert (1996-06-12): # For an English translation of the decree, see # "Diario Oficial: Time Zone Changeover" (1996-01-04). # http://mexico-travel.com/extra/timezone_eng.html # From Rives McDow (1998-10-08): # The State of Quintana Roo has reverted back to central STD and DST times # (i.e. UTC -0600 and -0500 as of 1998-08-02). # From Rives McDow (2000-01-10): # Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time # zone 5 hours from the International Date Line, and will not observe daylight # savings time so as to stay on the same time zone as the southern part of # Arizona year round. # From Jesper Nørgaard, translating # (2001-01-17): # In Oaxaca, the 55.000 teachers from the Section 22 of the National # Syndicate of Education Workers, refuse to apply daylight saving each # year, so that the more than 10,000 schools work at normal hour the # whole year. # From Gwillim Law (2001-01-19): # ... says # (translated):... # January 17, 2000 - The Energy Secretary, Ernesto Martens, announced # that Summer Time will be reduced from seven to five months, starting # this year.... # http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001 # [translated], says "summer time will ... take effect on the first Sunday # in May, and end on the last Sunday of September. # From Arthur David Olson (2001-01-25): # The 2001-01-24 traditional Washington Post contained the page one # story "Timely Issue Divides Mexicans."... # http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html # ... Mexico City Mayor López Obrador "...is threatening to keep # Mexico City and its 20 million residents on a different time than # the rest of the country..." In particular, López Obrador would abolish # observation of Daylight Saving Time. # Official statute published by the Energy Department # http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre # (2001-02-01) shows Baja and Chihauhua as still using US DST rules, # and Sonora with no DST. This was reported by Jesper Nørgaard (2001-02-03). # From Paul Eggert (2001-03-03): # # https://www.latimes.com/archives/la-xpm-2001-mar-03-mn-32561-story.html # James F. Smith writes in today's LA Times # * Sonora will continue to observe standard time. # * Last week Mexico City's mayor Andrés Manuel López Obrador decreed that # the Federal District will not adopt DST. # * 4 of 16 district leaders announced they'll ignore the decree. # * The decree does not affect federal-controlled facilities including # the airport, banks, hospitals, and schools. # # For now we'll assume that the Federal District will bow to federal rules. # From Jesper Nørgaard (2001-04-01): # I found some references to the Mexican application of daylight # saving, which modifies what I had already sent you, stating earlier # that a number of northern Mexican states would go on daylight # saving. The modification reverts this to only cover Baja California # (Norte), while all other states (except Sonora, who has no daylight # saving all year) will follow the original decree of president # Vicente Fox, starting daylight saving May 6, 2001 and ending # September 30, 2001. # References: "Diario de Monterrey" # Palabra (2001-03-31) # From Reuters (2001-09-04): # Mexico's Supreme Court on Tuesday declared that daylight savings was # unconstitutional in Mexico City, creating the possibility the # capital will be in a different time zone from the rest of the nation # next year.... The Supreme Court's ruling takes effect at 2:00 # a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to # standard time. "This is so residents of the Federal District are not # subject to unexpected time changes," a statement from the court said. # From Jesper Nørgaard Welen (2002-03-12): # ... consulting my local grocery store(!) and my coworkers, they all insisted # that a new decision had been made to reinstate US style DST in Mexico.... # http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) # confirms this. Sonora as usual is the only state where DST is not applied. # From Steffen Thorsen (2009-12-28): # # Steffen Thorsen wrote: # > Mexico's House of Representatives has approved a proposal for northern # > Mexico's border cities to share the same daylight saving schedule as # > the United States. # Now this has passed both the Congress and the Senate, so starting from # 2010, some border regions will be the same: # http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ # http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 # (Spanish) # # Could not find the new law text, but the proposed law text changes are here: # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf # (Gaceta Parlamentaria) # # There is also a list of the votes here: # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html # # Our page: # https://www.timeanddate.com/news/time/north-mexico-dst-change.html # From Arthur David Olson (2010-01-20): # The page # http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 # includes this text: # En los municipios fronterizos de Tijuana y Mexicali en Baja California; # Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila; # Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en # Tamaulipas, la aplicación de este horario estacional surtirá efecto # desde las dos horas del segundo domingo de marzo y concluirá a las dos # horas del primer domingo de noviembre. # En los municipios fronterizos que se encuentren ubicados en la franja # fronteriza norte en el territorio comprendido entre la línea # internacional y la línea paralela ubicada a una distancia de veinte # kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el # interior del país, la aplicación de este horario estacional surtirá # efecto desde las dos horas del segundo domingo de marzo y concluirá a # las dos horas del primer domingo de noviembre. # From Steffen Thorsen (2014-12-08), translated by Gwillim Law: # The Mexican state of Quintana Roo will likely change to EST in 2015. # # http://www.unioncancun.mx/articulo/2014/12/04/medio-ambiente/congreso-aprueba-una-hora-mas-de-sol-en-qroo # "With this change, the time conflict that has existed between the municipios # of Quintana Roo and the municipio of Felipe Carrillo Puerto may come to an # end. The latter declared itself in rebellion 15 years ago when a time change # was initiated in Mexico, and since then it has refused to change its time # zone along with the rest of the country." # # From Steffen Thorsen (2015-01-14), translated by Gwillim Law: # http://sipse.com/novedades/confirman-aplicacion-de-nueva-zona-horaria-para-quintana-roo-132331.html # "...the new time zone will come into effect at two o'clock on the first Sunday # of February, when we will have to advance the clock one hour from its current # time..." # Also, the new zone will not use DST. # # From Carlos Raúl Perasso (2015-02-02): # The decree that modifies the Mexican Hour System Law has finally # been published at the Diario Oficial de la Federación # http://www.dof.gob.mx/nota_detalle.php?codigo=5380123&fecha=31/01/2015 # It establishes 5 zones for Mexico: # 1- Zona Centro (Central Zone): Corresponds to longitude 90 W, # includes most of Mexico, excluding what's mentioned below. # 2- Zona Pacífico (Pacific Zone): Longitude 105 W, includes the # states of Baja California Sur; Chihuahua; Nayarit (excluding Bahía # de Banderas which lies in Central Zone); Sinaloa and Sonora. # 3- Zona Noroeste (Northwest Zone): Longitude 120 W, includes the # state of Baja California. # 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state # of Quintana Roo. # 5- The islands, reefs and keys shall take their timezone from the # longitude they are located at. # From Paul Eggert (2022-10-28): # The new Mexican law was published today: # https://www.dof.gob.mx/nota_detalle.php?codigo=5670045&fecha=28/10/2022 # This abolishes DST except where US DST rules are observed, # and in addition changes all of Chihuahua to -06 with no DST. # From Heitor David Pinto (2022-11-28): # Now the northern [municipios] want to have the same time zone as the # respective neighboring cities in the US, for example Juárez in UTC-7 with # DST, matching El Paso, and Ojinaga in UTC-6 with DST, matching Presidio.... # the president authorized the publication of the decree for November 29, # so the time change would occur on November 30 at 0:00. # http://puentelibre.mx/noticia/ciudad_juarez_cambio_horario_noviembre_2022/ # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Mexico 1931 only - Apr 30 0:00 1:00 D Rule Mexico 1931 only - Oct 1 0:00 0 S Rule Mexico 1939 only - Feb 5 0:00 1:00 D Rule Mexico 1939 only - Jun 25 0:00 0 S Rule Mexico 1940 only - Dec 9 0:00 1:00 D Rule Mexico 1941 only - Apr 1 0:00 0 S Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War Rule Mexico 1944 only - May 1 0:00 0 S Rule Mexico 1950 only - Feb 12 0:00 1:00 D Rule Mexico 1950 only - Jul 30 0:00 0 S Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D Rule Mexico 2001 only - Sep lastSun 2:00 0 S Rule Mexico 2002 2022 - Apr Sun>=1 2:00 1:00 D Rule Mexico 2002 2022 - Oct lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] # Quintana Roo; represented by Cancún Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 6:00u -6:00 - CST 1981 Dec 26 2:00 -5:00 - EST 1983 Jan 4 0:00 -6:00 Mexico C%sT 1997 Oct 26 2:00 -5:00 Mexico E%sT 1998 Aug 2 2:00 -6:00 Mexico C%sT 2015 Feb 1 2:00 -5:00 - EST # Campeche, Yucatán; represented by Mérida Zone America/Merida -5:58:28 - LMT 1922 Jan 1 6:00u -6:00 - CST 1981 Dec 26 2:00 -5:00 - EST 1982 Nov 2 2:00 -6:00 Mexico C%sT # Coahuila, Nuevo León, Tamaulipas (near US border) # This includes the following municipios: # in Coahuila: Acuña, Allende, Guerrero, Hidalgo, Jiménez, Morelos, Nava, # Ocampo, Piedras Negras, Villa Unión, Zaragoza # in Nuevo León: Anáhuac # in Tamaulipas: Nuevo Laredo, Guerrero, Mier, Miguel Alemán, Camargo, # Gustavo Díaz Ordaz, Reynosa, Río Bravo, Valle Hermoso, Matamoros. # https://www.dof.gob.mx/nota_detalle.php?codigo=5670045&fecha=28/10/2022 Zone America/Matamoros -6:30:00 - LMT 1922 Jan 1 6:00u -6:00 - CST 1988 -6:00 US C%sT 1989 -6:00 Mexico C%sT 2010 -6:00 US C%sT # Durango; Coahuila, Nuevo León, Tamaulipas (away from US border) Zone America/Monterrey -6:41:16 - LMT 1922 Jan 1 6:00u -7:00 - MST 1927 Jun 10 -6:00 - CST 1930 Nov 15 -7:00 Mexico M%sT 1932 Apr 1 -6:00 - CST 1988 -6:00 US C%sT 1989 -6:00 Mexico C%sT # Central Mexico Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 7:00u -7:00 - MST 1927 Jun 10 -6:00 - CST 1930 Nov 15 -7:00 Mexico M%sT 1932 Apr 1 -6:00 Mexico C%sT 2001 Sep 30 2:00 -6:00 - CST 2002 Feb 20 -6:00 Mexico C%sT # Chihuahua (near US border - western side) # This includes the municipios of Janos, Ascensión, Juárez, Guadalupe, and # Práxedis G Guerrero. # https://gaceta.diputados.gob.mx/PDF/65/2022/nov/20221124-VII.pdf Zone America/Ciudad_Juarez -7:05:56 - LMT 1922 Jan 1 7:00u -7:00 - MST 1927 Jun 10 -6:00 - CST 1930 Nov 15 -7:00 Mexico M%sT 1932 Apr 1 -6:00 - CST 1996 -6:00 Mexico C%sT 1998 -6:00 - CST 1998 Apr Sun>=1 3:00 -7:00 Mexico M%sT 2010 -7:00 US M%sT 2022 Oct 30 2:00 -6:00 - CST 2022 Nov 30 0:00 -7:00 US M%sT # Chihuahua (near US border - eastern side) # This includes the municipios of Coyame del Sotol, Ojinaga, and Manuel # Benavides. # https://gaceta.diputados.gob.mx/PDF/65/2022/nov/20221124-VII.pdf Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 7:00u -7:00 - MST 1927 Jun 10 -6:00 - CST 1930 Nov 15 -7:00 Mexico M%sT 1932 Apr 1 -6:00 - CST 1996 -6:00 Mexico C%sT 1998 -6:00 - CST 1998 Apr Sun>=1 3:00 -7:00 Mexico M%sT 2010 -7:00 US M%sT 2022 Oct 30 2:00 -6:00 - CST 2022 Nov 30 0:00 -6:00 US C%sT # Chihuahua (away from US border) Zone America/Chihuahua -7:04:20 - LMT 1922 Jan 1 7:00u -7:00 - MST 1927 Jun 10 -6:00 - CST 1930 Nov 15 -7:00 Mexico M%sT 1932 Apr 1 -6:00 - CST 1996 -6:00 Mexico C%sT 1998 -6:00 - CST 1998 Apr Sun>=1 3:00 -7:00 Mexico M%sT 2022 Oct 30 2:00 -6:00 - CST # Sonora Zone America/Hermosillo -7:23:52 - LMT 1922 Jan 1 7:00u -7:00 - MST 1927 Jun 10 -6:00 - CST 1930 Nov 15 -7:00 Mexico M%sT 1932 Apr 1 -6:00 - CST 1942 Apr 24 -7:00 - MST 1996 -7:00 Mexico M%sT 1999 -7:00 - MST # Baja California Sur, Nayarit (except Bahía de Banderas), Sinaloa Zone America/Mazatlan -7:05:40 - LMT 1922 Jan 1 7:00u -7:00 - MST 1927 Jun 10 -6:00 - CST 1930 Nov 15 -7:00 Mexico M%sT 1932 Apr 1 -6:00 - CST 1942 Apr 24 -7:00 - MST 1970 -7:00 Mexico M%sT # Bahía de Banderas # From Alexander Krivenyshev (2010-04-21): # According to news, Bahía de Banderas (Mexican state of Nayarit) # changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to # share the same time zone as nearby city Puerto Vallarta, Jalisco). # # (Spanish) # Bahía de Banderas homologa su horario al del centro del # país, a partir de este domingo # http://www.nayarit.gob.mx/notes.asp?id=20748 # # Bahía de Banderas homologa su horario con el del Centro del # País # http://www.bahiadebanderas.gob.mx/principal/index.php?option=com_content&view=article&id=261:bahia-de-banderas-homologa-su-horario-con-el-del-centro-del-pais&catid=42:comunicacion-social&Itemid=50 # # (English) # Puerto Vallarta and Bahía de Banderas: One Time Zone # http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml # http://www.worldtimezone.com/dst_news/dst_news_mexico08.html # # "Mexico's Senate approved the amendments to the Mexican Schedule System that # will allow Bahía de Banderas and Puerto Vallarta to share the same time # zone ..." # Baja California Sur, Nayarit, Sinaloa # From Arthur David Olson (2010-05-01): # Use "Bahia_Banderas" to keep the name to fourteen characters. Zone America/Bahia_Banderas -7:01:00 - LMT 1922 Jan 1 7:00u -7:00 - MST 1927 Jun 10 -6:00 - CST 1930 Nov 15 -7:00 Mexico M%sT 1932 Apr 1 -6:00 - CST 1942 Apr 24 -7:00 - MST 1970 -7:00 Mexico M%sT 2010 Apr 4 2:00 -6:00 Mexico C%sT # Baja California Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 7:00u -7:00 - MST 1924 -8:00 - PST 1927 Jun 10 -7:00 - MST 1930 Nov 15 -8:00 - PST 1931 Apr 1 -8:00 1:00 PDT 1931 Sep 30 -8:00 - PST 1942 Apr 24 -8:00 1:00 PWT 1945 Aug 14 23:00u -8:00 1:00 PPT 1945 Nov 15 # Peace -8:00 - PST 1948 Apr 5 -8:00 1:00 PDT 1949 Jan 14 -8:00 - PST 1950 May 1 -8:00 1:00 PDT 1950 Sep 24 -8:00 - PST 1951 Apr 29 2:00 -8:00 1:00 PDT 1951 Sep 30 2:00 -8:00 - PST 1952 Apr 27 2:00 -8:00 1:00 PDT 1952 Sep 28 2:00 -8:00 CA P%sT 1967 -8:00 US P%sT 1996 -8:00 Mexico P%sT 2001 -8:00 US P%sT 2002 Feb 20 -8:00 Mexico P%sT 2010 -8:00 US P%sT # From Paul Eggert (2006-03-22): # Formerly there was an America/Ensenada zone, which differed from # America/Tijuana only in that it did not observe DST from 1976 # through 1995. This was as per Shanks (1999). But Shanks & Pottenger say # Ensenada did not observe DST from 1948 through 1975. Guy Harris reports # that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and # Tijuana observe DST," which agrees with Shanks & Pottenger but implies that # DST-observance was a town-by-town matter back then. This concerns # data after 1970 so most likely there should be at least one Zone # other than America/Tijuana for Baja, but it's not clear yet what its # name or contents should be. # # From Paul Eggert (2015-10-08): # Formerly there was an America/Santa_Isabel zone, but this appears to # have come from a misreading of # http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 # It has been moved to the 'backward' file. # # From Paul Eggert (2022-10-28): # Today's new law states that the entire state of Baja California # follows US DST rules, which agrees with simplifications noted above. # # # Revillagigedo Is # no information ############################################################################### # Anguilla # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Anguilla -4:12:16 - LMT 1912 Mar 2 -4:00 - AST # Antigua & Barbuda # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Antigua -4:07:12 - LMT 1912 Mar 2 -5:00 - EST 1951 -4:00 - AST # The Bahamas # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Bahamas 1942 only - May 1 24:00 1:00 W Rule Bahamas 1944 only - Dec 31 24:00 0 S Rule Bahamas 1945 only - Feb 1 0:00 1:00 W Rule Bahamas 1945 only - Aug 14 23:00u 1:00 P # Peace Rule Bahamas 1945 only - Oct 17 24:00 0 S Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Nassau -5:09:30 - LMT 1912 Mar 2 -5:00 Bahamas E%sT 1976 -5:00 US E%sT # Barbados # For 1899 Milne gives -3:58:29.2. # From P Chan (2020-12-09 and 2020-12-11): # Standard time of GMT-4 was adopted in 1911. # Definition of Time Act, 1911 (1911-7) [1911-08-28] # 1912, Laws of Barbados (5 v.), OCLC Number: 919801291, Vol. 4, Image No. 522 # 1944, Laws of Barbados (5 v.), OCLC Number: 84548697, Vol. 4, Image No. 122 # http://llmc.com/browse.aspx?type=2&coll=85&div=297 # # DST was observed in 1942-44. # Defence (Daylight Saving) Regulations, 1942, 1942-04-13 # Defence (Daylight Saving) (Repeal) Regulations, 1942, 1942-08-22 # Defence (Daylight Saving) Regulations, 1943, 1943-04-16 # Defence (Daylight Saving) (Repeal) Regulations, 1943, 1943-09-01 # Defence (Daylight Saving) Regulations, 1944, 1944-03-21 # [Defence (Daylight Saving) (Amendment) Regulations 1944, 1944-03-28] # Defence (Daylight Saving) (Repeal) Regulations, 1944, 1944-08-30 # # 1914-, Subsidiary Legis., Annual Vols. OCLC Number: 226290591 # 1942: Image Nos. 527-528, 555-556 # 1943: Image Nos. 178-179, 198 # 1944: Image Nos. 113-115, 129 # http://llmc.com/titledescfull.aspx?type=2&coll=85&div=297&set=98437 # # From Tim Parenti (2021-02-20): # The transitions below are derived from P Chan's sources, except that the 1977 # through 1980 transitions are from Shanks & Pottenger since we have no better # data there. Of particular note, the 1944 DST regulation only advanced the # time to "exactly three and a half hours later than Greenwich mean time", as # opposed to "three hours" in the 1942 and 1943 regulations. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Barb 1942 only - Apr 19 5:00u 1:00 D Rule Barb 1942 only - Aug 31 6:00u 0 S Rule Barb 1943 only - May 2 5:00u 1:00 D Rule Barb 1943 only - Sep 5 6:00u 0 S Rule Barb 1944 only - Apr 10 5:00u 0:30 - Rule Barb 1944 only - Sep 10 6:00u 0 S Rule Barb 1977 only - Jun 12 2:00 1:00 D Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D Rule Barb 1979 only - Sep 30 2:00 0 S Rule Barb 1980 only - Sep 25 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] #STDOFF -3:58:29.2 Zone America/Barbados -3:58:29 - LMT 1911 Aug 28 # Bridgetown -4:00 Barb A%sT 1944 -4:00 Barb AST/-0330 1945 -4:00 Barb A%sT # Belize # From P Chan (2020-11-03): # Below are some laws related to the time in British Honduras/Belize: # # Definition of Time Ordinance, 1927 (No.4 of 1927) [1927-04-01] # Ordinances of British Honduras Passed in the Year 1927, p 19-20 # https://books.google.com/books?id=LqEpAQAAMAAJ&pg=RA3-PA19 # # Definition of Time (Amendment) Ordinance, 1942 (No. 5 of 1942) [1942-06-27] # Ordinances of British Honduras Passed in the Year 1942, p 31-32 # https://books.google.com/books?id=h6MpAQAAMAAJ&pg=RA6-PA95-IA44 # # Definition of Time Ordinance, 1945 (No. 19 of 1945) [1945-12-15] # Ordinances of British Honduras Passed in the Year 1945, p 49-50 # https://books.google.com/books?id=xaMpAQAAMAAJ&pg=RA2-PP1 # # Definition of Time Ordinance, 1947 (No. 1 of 1947) [1947-03-11] # Ordinances of British Honduras Passed in the Year 1947, p 1-2 # https://books.google.com/books?id=xaMpAQAAMAAJ&pg=RA3-PA1 # # Time (Definition of) Ordinance (Chapter 180) # The Laws of British Honduras in Force on the 15th Day of September, 1958 , Volume IV, p 2580 # https://books.google.com/books?id=v5QpAQAAMAAJ&pg=PA2580 # # Time (Definition of) (Amendment) Ordinance, 1968 (No. 13 of 1968) [1968-08-03] # https://books.google.com/books?id=xij7KEB_58wC&pg=RA1-PA428-IA9 # # Definition of Time Act (Chapter 339) # Law of Belize, Revised Edition 2000 # http://www.belizelaw.org/web/lawadmin/PDF%20files/cap339.pdf # From Paul Eggert (2020-11-03): # The transitions below are derived from P Chan's sources, except that the # 1973 through 1983 transitions are from Shanks & Pottenger since we have # no better data there. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Belize 1918 1941 - Oct Sat>=1 24:00 0:30 -0530 Rule Belize 1919 1942 - Feb Sat>=8 24:00 0 CST Rule Belize 1942 only - Jun 27 24:00 1:00 CWT Rule Belize 1945 only - Aug 14 23:00u 1:00 CPT Rule Belize 1945 only - Dec 15 24:00 0 CST Rule Belize 1947 1967 - Oct Sat>=1 24:00 0:30 -0530 Rule Belize 1948 1968 - Feb Sat>=8 24:00 0 CST Rule Belize 1973 only - Dec 5 0:00 1:00 CDT Rule Belize 1974 only - Feb 9 0:00 0 CST Rule Belize 1982 only - Dec 18 0:00 1:00 CDT Rule Belize 1983 only - Feb 12 0:00 0 CST # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Belize -5:52:48 - LMT 1912 Apr 1 -6:00 Belize %s # Bermuda # From Paul Eggert (2022-07-27): # For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower, # Bermuda dockyard, Ireland I. This agrees with standard offset given in the # Daylight Saving Act, 1917 cited below. # It is not known when this time became standard for Bermuda; guess 1890. # The transition to -04 was specified by: # 1930: The Time Zone Act, 1929 (1929: No. 39) [1929-11-08] # https://books.google.com/books?id=7tdMAQAAIAAJ&pg=RA54-PP1 # From P Chan (2020-11-20): # Most of the information can be found online from the Bermuda National # Library - Digital Collection which includes The Royal Gazette (RG) until 1957 # https://bnl.contentdm.oclc.org/digital/ # I will cite the ID. For example, [10000] means # https://bnl.contentdm.oclc.org/digital/collection/BermudaNP02/id/10000 # # 1917: Apr 5 midnight to Sep 30 midnight # Daylight Saving Act, 1917 (1917 No. 13) [1917-04-02] # Bermuda Acts and Resolves 1917, p 37-38 # https://books.google.com/books?id=M-lCAQAAMAAJ&pg=PA36-IA2 # RG, 1917-04-04, p 6 [42340] gives the spring forward date. # # 1918: Apr 13 midnight to Sep 15 midnight # Daylight Saving Act, 1918 (1918 No. 9) [1918-04-06] # Bermuda Acts and Resolves 1917, p 13 # https://books.google.com/books?id=K-lCAQAAMAAJ&pg=RA1-PA7 # # Note that local mean time was still used before 1930. # # During WWII, DST was introduced by Defence Regulations # 1942: Jan 11 02:00 to Oct 18 02:00 [113646], [115726] # 1943: Mar 21 02:00 to Oct 31 02:00 [116704], [118193] # 1944: Mar 12 02:00 to Nov 5 02:00 [119225], [121593] # 1945: Mar 11 02:00 to Nov 4 02:00 [122369], [124461] # RG, 1942-01-08, p 2, 1942-10-12, p 2 , 1943-03-06, p 2, 1943-09-03, p 1, # 1944-02-29, p 6, 1944-09-20, p 2, 1945-02-13, p 2, 1945-11-03, p 1 # # In 1946, the House of Assembly rejected DST twice. [128686], [128076] # RG, 1946-03-16 p 1,1946-04-13 p 1 # # 1947: third Sunday in May 02:00 to second Sunday in September 02:00 # DST in 1947 was defined in the Daylight Saving Act, 1947 (1947: No. 12) # which expired at the end of the year. [125784] ,[132405], [144454], [138226] # RG, 1947-02-27, p 1, 1947-05-15, p 1, 1947-09-13, p 1, 1947-12-30, p 1 # # 1948-1952: fourth Sunday in May 02:00 to first Sunday in September 02:00 # DST in 1948 was defined in the Daylight Saving Act, 1948 (1948 : No. 12) # which was set to expired at the end of the year but it was extended until # the end of 1952 and was not further extended. # [129802], [139403], [146008], [135240], [144330], [139049], [143309], # [148271], [149773], [153589], [153802], [155924] # RG, 1948-04-13, p 1, 1948-05-22, p 1, 1948-09-04, p 1, 1949-05-21, p1, # 1949-09-03, p 1, 1950-05-27 p 1, 1950-09-02, p 1, 1951-05-27, p 1, # 1951-09-01, p 1, 1952-05-23, p 1, 1952-09-26, p 1, 1952-12-21, p 8 # # In 1953-1955, the House of Assembly rejected DST each year. [158996], # [162620], [166720] RG, 1953-05-02, p 1, 1954-04-01 p 1, 1955-03-12, p 1 # # 1956: fourth Sunday in May 02:00 to last Sunday in October 02:00 # Time Zone (Seasonal Variation) Act, 1956 (1956: No.44) [1956-05-25] # Bermuda Public Acts 1956, p 331-332 # https://books.google.com/books?id=Xs1AlmD_cEwC&pg=PA63 # # The extension of the Act was rejected by the House of Assembly. [176218] # RG, 1956-12-13, p 1 # # From the Chronological Table of Public and Private Acts up to 1985, it seems # that there does not exist other Acts related to DST before 1973. # https://books.google.com/books?id=r9hMAQAAIAAJ&pg=RA23-PA1 # Public Acts of the Legislature of the Islands of Bermuda, Together with # Statutory Instruments in Force Thereunder, Vol VII # From Dan Jones, reporting in The Royal Gazette (2006-06-26): # Next year, however, clocks in the US will go forward on the second Sunday # in March, until the first Sunday in November. And, after the Time Zone # (Seasonal Variation) Bill 2006 was passed in the House of Assembly on # Friday, the same thing will happen in Bermuda. # http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Bermuda 1917 only - Apr 5 24:00 1:00 - Rule Bermuda 1917 only - Sep 30 24:00 0 - Rule Bermuda 1918 only - Apr 13 24:00 1:00 - Rule Bermuda 1918 only - Sep 15 24:00 0 S Rule Bermuda 1942 only - Jan 11 2:00 1:00 D Rule Bermuda 1942 only - Oct 18 2:00 0 S Rule Bermuda 1943 only - Mar 21 2:00 1:00 D Rule Bermuda 1943 only - Oct 31 2:00 0 S Rule Bermuda 1944 1945 - Mar Sun>=8 2:00 1:00 D Rule Bermuda 1944 1945 - Nov Sun>=1 2:00 0 S Rule Bermuda 1947 only - May Sun>=15 2:00 1:00 D Rule Bermuda 1947 only - Sep Sun>=8 2:00 0 S Rule Bermuda 1948 1952 - May Sun>=22 2:00 1:00 D Rule Bermuda 1948 1952 - Sep Sun>=1 2:00 0 S Rule Bermuda 1956 only - May Sun>=22 2:00 1:00 D Rule Bermuda 1956 only - Oct lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] #STDOFF -4:19:18.3 Zone Atlantic/Bermuda -4:19:18 - LMT 1890 # Hamilton -4:19:18 Bermuda BMT/BST 1930 Jan 1 2:00 -4:00 Bermuda A%sT 1974 Apr 28 2:00 -4:00 Canada A%sT 1976 -4:00 US A%sT # Caribbean Netherlands # See America/Kralendijk in southamerica. # Cayman Is # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown -5:07:10 - KMT 1912 Feb # Kingston Mean Time -5:00 - EST # Costa Rica # Milne gives -5:36:13.3 as San José mean time. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D # IATA SSIM (1991-09) says the following was at 1:00; # go with Shanks & Pottenger. Rule CR 1991 only - Jul 1 0:00 0 S Rule CR 1992 only - Mar 15 0:00 0 S # There are too many San Josés elsewhere, so we'll use 'Costa Rica'. # Zone NAME STDOFF RULES FORMAT [UNTIL] #STDOFF -5:36:13.3 Zone America/Costa_Rica -5:36:13 - LMT 1890 # San José -5:36:13 - SJMT 1921 Jan 15 # San José Mean Time -6:00 CR C%sT # Coco # no information; probably like America/Costa_Rica # Cuba # From Paul Eggert (2013-02-21): # Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57 # for the port, and -5:30 for meteorological observations. # For now, stick with Shanks & Pottenger. # From Arthur David Olson (1999-03-29): # The 1999-03-28 exhibition baseball game held in Havana, Cuba, between # the Cuban National Team and the Baltimore Orioles was carried live on # the Orioles Radio Network, including affiliate WTOP in Washington, DC. # During the game, play-by-play announcer Jim Hunter noted that # "We'll be losing two hours of sleep...Cuba switched to Daylight Saving # Time today." (The "two hour" remark referred to losing one hour of # sleep on 1999-03-28 - when the announcers were in Cuba as it switched # to DST - and one more hour on 1999-04-04 - when the announcers will have # returned to Baltimore, which switches on that date.) # From Steffen Thorsen (2013-11-11): # DST start in Cuba in 2004 ... does not follow the same rules as the # years before. The correct date should be Sunday 2004-03-28 00:00 ... # https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html # From Evert van der Veer via Steffen Thorsen (2004-10-28): # Cuba is not going back to standard time this year. # From Paul Eggert (2006-03-22): # http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html # says that it's due to a problem at the Antonio Guiteras # thermoelectric plant, and says "This October there will be no return # to normal hours (after daylight saving time)". # For now, let's assume that it's a temporary measure. # From Carlos A. Carnero Delgado (2005-11-12): # This year (just like in 2004-2005) there's no change in time zone # adjustment in Cuba. We will stay in daylight saving time: # http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html # From Jesper Nørgaard Welen (2006-10-21): # An article in GRANMA INTERNACIONAL claims that Cuba will end # the 3 years of permanent DST next weekend, see # http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html # "On Saturday night, October 28 going into Sunday, October 29, at 01:00, # watches should be set back one hour - going back to 00:00 hours - returning # to the normal schedule.... # From Paul Eggert (2007-03-02): # , dated yesterday, # says Cuban clocks will advance at midnight on March 10. # For lack of better information, assume Cuba will use US rules, # except that it switches at midnight standard time as usual. # # From Steffen Thorsen (2007-10-25): # Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week # earlier - on the last Sunday of October, just like in 2006. # # He supplied these references: # # http://www.prensalatina.com.mx/article.asp?ID={4CC32C1B-A9F7-42FB-8A07-8631AFC923AF}&language=ES # http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm # # From Alex Krivenyshev (2007-10-25): # Here is also article from Granma (Cuba): # # Regirá el Horario Normal desde el próximo domingo 28 de octubre # http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html # # http://www.worldtimezone.com/dst_news/dst_news_cuba03.html # From Arthur David Olson (2008-03-09): # I'm in Maryland which is now observing United States Eastern Daylight # Time. At 9:44 local time I used RealPlayer to listen to # http://media.enet.cu/radioreloj # a Cuban information station, and heard # the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), # indicating that Cuba is still on standard time. # From Steffen Thorsen (2008-03-12): # It seems that Cuba will start DST on Sunday, 2007-03-16... # It was announced yesterday, according to this source (in Spanish): # http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm # # Some more background information is posted here: # https://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html # # The article also says that Cuba has been observing DST since 1963, # while Shanks (and tzdata) has 1965 as the first date (except in the # 1940's). Many other web pages in Cuba also claim that it has been # observed since 1963, but with the exception of 1970 - an exception # which is not present in tzdata/Shanks. So there is a chance we need to # change some historic records as well. # # One example: # http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm # From Jesper Nørgaard Welen (2008-03-13): # The Cuban time change has just been confirmed on the most authoritative # web site, the Granma. Please check out # http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html # # Basically as expected after Steffen Thorsen's information, the change # will take place midnight between Saturday and Sunday. # From Arthur David Olson (2008-03-12): # Assume Sun>=15 (third Sunday) going forward. # From Alexander Krivenyshev (2009-03-04) # According to the Radio Reloj - Cuba will start Daylight Saving Time on # midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- # not on midnight March 14 / March 15 as previously thought. # # http://www.worldtimezone.com/dst_news/dst_news_cuba05.html # (in Spanish) # From Arthur David Olson (2009-03-09) # I listened over the Internet to # http://media.enet.cu/readioreloj # this morning; when it was 10:05 a. m. here in Bethesda, Maryland the # the time was announced as "diez cinco" - the same time as here, indicating # that has indeed switched to DST. Assume second Sunday from 2009 forward. # From Steffen Thorsen (2011-03-08): # Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00 # this year. Nothing about the end date known so far (if that has # changed at all). # # Source: # http://granma.co.cu/2011/03/08/nacional/artic01.html # # Our info: # https://www.timeanddate.com/news/time/cuba-starts-dst-2011.html # # From Steffen Thorsen (2011-10-30) # Cuba will end DST two weeks later this year. Instead of going back # tonight, it has been delayed to 2011-11-13 at 01:00. # # One source (Spanish) # http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html # # Our page: # https://www.timeanddate.com/news/time/cuba-time-changes-2011.html # # From Steffen Thorsen (2012-03-01) # According to Radio Reloj, Cuba will start DST on Midnight between March # 31 and April 1. # # Radio Reloj has the following info (Spanish): # http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril # # Our info on it: # https://www.timeanddate.com/news/time/cuba-starts-dst-2012.html # From Steffen Thorsen (2012-11-03): # Radio Reloj and many other sources report that Cuba is changing back # to standard time on 2012-11-04: # http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre # From Paul Eggert (2012-11-03): # For now, assume the future rule is first Sunday in November. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Cuba 1928 only - Jun 10 0:00 1:00 D Rule Cuba 1928 only - Oct 10 0:00 0 S Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S Rule Cuba 1965 only - Jun 1 0:00 1:00 D Rule Cuba 1965 only - Sep 30 0:00 0 S Rule Cuba 1966 only - May 29 0:00 1:00 D Rule Cuba 1966 only - Oct 2 0:00 0 S Rule Cuba 1967 only - Apr 8 0:00 1:00 D Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S Rule Cuba 1968 only - Apr 14 0:00 1:00 D Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S Rule Cuba 1972 1974 - Oct 8 0:00 0 S Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S Rule Cuba 1978 only - May 7 0:00 1:00 D Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S Rule Cuba 1996 only - Oct 6 0:00s 0 S Rule Cuba 1997 only - Oct 12 0:00s 0 S Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S Rule Cuba 2000 2003 - Apr Sun>=1 0:00s 1:00 D Rule Cuba 2004 only - Mar lastSun 0:00s 1:00 D Rule Cuba 2006 2010 - Oct lastSun 0:00s 0 S Rule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D Rule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D Rule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D Rule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D Rule Cuba 2011 only - Nov 13 0:00s 0 S Rule Cuba 2012 only - Apr 1 0:00s 1:00 D Rule Cuba 2012 max - Nov Sun>=1 0:00s 0 S Rule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Havana -5:29:28 - LMT 1890 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT -5:00 Cuba C%sT # Dominica # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau -4:00 - AST # Dominican Republic # From Steffen Thorsen (2000-10-30): # Enrique Morales reported to me that the Dominican Republic has changed the # time zone to Eastern Standard Time as of Sunday 29 at 2 am.... # http://www.listin.com.do/antes/261000/republica/princi.html # From Paul Eggert (2000-12-04): # That URL (2000-10-26, in Spanish) says they planned to use US-style DST. # From Rives McDow (2000-12-01): # Dominican Republic changed its mind and presidential decree on Tuesday, # November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the # Dominican Republic will be reverting to 8 hours from the International Date # Line, and will not be using DST in the foreseeable future. The reason they # decided to use DST was to be in synch with Puerto Rico, who was also going # to implement DST. When Puerto Rico didn't implement DST, the president # decided to revert. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule DR 1966 only - Oct 30 0:00 1:00 EDT Rule DR 1967 only - Feb 28 0:00 0 EST Rule DR 1969 1973 - Oct lastSun 0:00 0:30 -0430 Rule DR 1970 only - Feb 21 0:00 0 EST Rule DR 1971 only - Jan 20 0:00 0 EST Rule DR 1972 1974 - Jan 21 0:00 0 EST # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Santo_Domingo -4:39:36 - LMT 1890 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT -5:00 DR %s 1974 Oct 27 -4:00 - AST 2000 Oct 29 2:00 -5:00 US E%sT 2000 Dec 3 1:00 -4:00 - AST # El Salvador # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D Rule Salv 1987 1988 - Sep lastSun 0:00 0 S # There are too many San Salvadors elsewhere, so use America/El_Salvador # instead of America/San_Salvador. # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador -6:00 Salv C%sT # Grenada # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Grenada -4:07:00 - LMT 1911 Jul # St George's -4:00 - AST # Guadeloupe # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe-à-Pitre -4:00 - AST # St Barthélemy # See America/St_Barthelemy in southamerica. # St Martin (French part) # See America/Marigot in southamerica. # Guatemala # # From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: # Diario Co Latino, at # , # says in an article dated 2006-04-19 that the Guatemalan government had # decided on that date to advance official time by 60 minutes, to lessen the # impact of the elevated cost of oil.... Daylight saving time will last from # 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). # From Paul Eggert (2006-06-22): # The Ministry of Energy and Mines, press release CP-15/2006 # (2006-04-19), says DST ends at 24:00. See # http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Guat 1973 only - Nov 25 0:00 1:00 D Rule Guat 1974 only - Feb 24 0:00 0 S Rule Guat 1983 only - May 21 0:00 1:00 D Rule Guat 1983 only - Sep 22 0:00 0 S Rule Guat 1991 only - Mar 23 0:00 1:00 D Rule Guat 1991 only - Sep 7 0:00 0 S Rule Guat 2006 only - Apr 30 0:00 1:00 D Rule Guat 2006 only - Oct 1 0:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5 -6:00 Guat C%sT # Haiti # From Gwillim Law (2005-04-15): # Risto O. Nykänen wrote me that Haiti is now on DST. # I searched for confirmation, and I found a press release # on the Web page of the Haitian Consulate in Chicago (2005-03-31), # . Translated from French, it says: # # "The Prime Minister's Communication Office notifies the public in general # and the press in particular that, following a decision of the Interior # Ministry and the Territorial Collectivities [I suppose that means the # provinces], Haiti will move to Eastern Daylight Time in the night from next # Saturday the 2nd to Sunday the 3rd. # # "Consequently, the Prime Minister's Communication Office wishes to inform # the population that the country's clocks will be set forward one hour # starting at midnight. This provision will hold until the last Saturday in # October 2005. # # "Port-au-Prince, March 31, 2005" # # From Steffen Thorsen (2006-04-04): # I have been informed by users that Haiti observes DST this year like # last year, so the current "only" rule for 2005 might be changed to a # "max" rule or to last until 2006. (Who knows if they will observe DST # next year or if they will extend their DST like US/Canada next year). # # I have found this article about it (in French): # http://www.haitipressnetwork.com/news.cfm?articleID=7612 # # The reason seems to be an energy crisis. # From Stephen Colebourne (2007-02-22): # Some IATA info: Haiti won't be having DST in 2007. # From Steffen Thorsen (2012-03-11): # According to several news sources, Haiti will observe DST this year, # apparently using the same start and end date as USA/Canada. # So this means they have already changed their time. # # http://www.alterpresse.org/spip.php?article12510 # http://radiovision2000haiti.net/home/?p=13253 # # From Arthur David Olson (2012-03-11): # The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to # 3:00 a.m. rather than the traditional Haitian jump at midnight. # Assume a US-style fall back as well. # From Steffen Thorsen (2013-03-10): # It appears that Haiti is observing DST this year as well, same rules # as US/Canada. They did it last year as well, and it looks like they # are going to observe DST every year now... # # http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/ # http://www.canalplushaiti.net/?p=6714 # From Steffen Thorsen (2016-03-12): # Jean Antoine, editor of www.haiti-reference.com informed us that Haiti # are not going on DST this year. Several other resources confirm this: ... # https://www.radiotelevisioncaraibes.com/presse/heure_d_t_pas_de_changement_d_heure_pr_vu_pour_cet_ann_e.html # https://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/ # http://news.anmwe.com/haiti-lheure-nationale-ne-sera-ni-avancee-ni-reculee-cette-annee/ # From Steffen Thorsen (2017-03-12): # We have received 4 mails from different people telling that Haiti # has started DST again today, and this source seems to confirm that, # I have not been able to find a more authoritative source: # https://www.haitilibre.com/en/news-20319-haiti-notices-time-change-in-haiti.html # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Haiti 1983 only - May 8 0:00 1:00 D Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S # Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. # Go with IATA. Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S Rule Haiti 2012 2015 - Mar Sun>=8 2:00 1:00 D Rule Haiti 2012 2015 - Nov Sun>=1 2:00 0 S Rule Haiti 2017 max - Mar Sun>=8 2:00 1:00 D Rule Haiti 2017 max - Nov Sun>=1 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Port-au-Prince -4:49:20 - LMT 1890 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT -5:00 Haiti E%sT # Honduras # Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. # From Paul Eggert (2006-05-05): # worldtimezone.com reports a 2006-05-02 Spanish-language AP article # saying Honduras will start using DST midnight Saturday, effective 4 # months until September. La Tribuna reported today # that Manuel Zelaya, the president # of Honduras, refused to back down on this. # From Jesper Nørgaard Welen (2006-08-08): # It seems that Honduras has returned from DST to standard time this Monday at # 00:00 hours (prolonging Sunday to 25 hours duration). # http://www.worldtimezone.com/dst_news/dst_news_honduras04.html # From Paul Eggert (2006-08-08): # Also see Diario El Heraldo, The country returns to standard time (2006-08-08). # http://www.elheraldo.hn/nota.php?nid=54941&sec=12 # It mentions executive decree 18-2006. # From Steffen Thorsen (2006-08-17): # Honduras will observe DST from 2007 to 2009, exact dates are not # published, I have located this authoritative source: # http://www.presidencia.gob.hn/noticia.aspx?nId=47 # From Steffen Thorsen (2007-03-30): # http://www.laprensahn.com/pais_nota.php?id04962=7386 # So it seems that Honduras will not enter DST this year.... # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D Rule Hond 1987 1988 - Sep lastSun 0:00 0 S Rule Hond 2006 only - May Sun>=1 0:00 1:00 D Rule Hond 2006 only - Aug Mon>=1 0:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr -6:00 Hond C%sT # # Great Swan I ceded by US to Honduras in 1972 # Jamaica # Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an # unspecified official document, and says "This time is used throughout the # island". Go with Milne. # # Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but # Lance Neita writes that Prime Minister Michael Manley decreed it January 5. # Assume Neita meant Jan 6 02:00, the same as the US. Neita also writes that # Manley's supporters associated this act with Manley's nickname "Joshua" # (recall that in the Bible the sun stood still at Joshua's request), # and with the Rod of Correction which Manley said he had received from # Haile Selassie, Emperor of Ethiopia. See: # Neita L. The politician in all of us. Jamaica Observer 2014-09-20 # http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647 # # Zone NAME STDOFF RULES FORMAT [UNTIL] #STDOFF -5:07:10.41 Zone America/Jamaica -5:07:10 - LMT 1890 # Kingston -5:07:10 - KMT 1912 Feb # Kingston Mean Time -5:00 - EST 1974 -5:00 US E%sT 1984 -5:00 - EST # Martinique # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France -4:04:20 - FFMT 1911 May 1 # Fort-de-France MT -4:00 - AST 1980 Apr 6 -4:00 1:00 ADT 1980 Sep 28 -4:00 - AST # Montserrat # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Cork Hill -4:00 - AST # Nicaragua # # This uses Shanks & Pottenger for times before 2005. # # From Steffen Thorsen (2005-04-12): # I've got reports from 8 different people that Nicaragua just started # DST on Sunday 2005-04-10, in order to save energy because of # expensive petroleum. The exact end date for DST is not yet # announced, only "September" but some sites also say "mid-September". # Some background information is available on the President's official site: # http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm # The Decree, no 23-2005 is available here: # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2005/Decreto%2023-2005%20Se%20adelanta%20en%20una%20hora%20en%20todo%20el%20territorio%20nacional%20apartir%20de%20las%2024horas%20del%2009%20de%20Abril.pdf # # From Paul Eggert (2005-05-01): # The decree doesn't say anything about daylight saving, but for now let's # assume that it is daylight saving.... # # From Gwillim Law (2005-04-21): # The Associated Press story on the time change, which can be found at # http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html # and elsewhere, says (fifth paragraph, translated from Spanish): "The last # time that a change of clocks was applied to save energy was in the year 2000 # during the Arnoldo Alemán administration."... # The northamerica file says that Nicaragua has been on UTC-6 continuously # since December 1998. I wasn't able to find any details of Nicaraguan time # changes in 2000. Perhaps a note could be added to the northamerica file, to # the effect that we have indirect evidence that DST was observed in 2000. # # From Jesper Nørgaard Welen (2005-11-02): # Nicaragua left DST the 2005-10-02 at 00:00 (local time). # http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm # (2005-09-26) # # From Jesper Nørgaard Welen (2006-05-05): # http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 # (my informal translation) # By order of the president of the republic, Enrique Bolaños, Nicaragua # advanced by sixty minutes their official time, yesterday at 2 in the # morning, and will stay that way until 30th of September. # # From Jesper Nørgaard Welen (2006-09-30): # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf # My informal translation runs: # The natural sun time is restored in all the national territory, in that the # time is returned one hour at 01:00 am of October 1 of 2006. # # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S Rule Nic 2005 only - Apr 10 0:00 1:00 D Rule Nic 2005 only - Oct Sun>=1 0:00 0 S Rule Nic 2006 only - Apr 30 2:00 1:00 D Rule Nic 2006 only - Oct Sun>=1 1:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Managua -5:45:08 - LMT 1890 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? -6:00 - CST 1973 May -5:00 - EST 1975 Feb 16 -6:00 Nic C%sT 1992 Jan 1 4:00 -5:00 - EST 1992 Sep 24 -6:00 - CST 1993 -5:00 - EST 1997 -6:00 Nic C%sT # Panama # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Panama -5:18:08 - LMT 1890 -5:19:36 - CMT 1908 Apr 22 # Colón Mean Time -5:00 - EST # Puerto Rico # There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'. # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan -4:00 - AST 1942 May 3 -4:00 US A%sT 1946 -4:00 - AST # St Kitts-Nevis # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre -4:00 - AST # St Lucia # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/St_Lucia -4:04:00 - LMT 1890 # Castries -4:04:00 - CMT 1912 # Castries Mean Time -4:00 - AST # St Pierre and Miquelon # There are too many St Pierres elsewhere, so we'll use 'Miquelon'. # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Miquelon -3:44:40 - LMT 1911 Jun 15 # St Pierre -4:00 - AST 1980 May -3:00 - %z 1987 -3:00 Canada %z # St Vincent & the Grenadines # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown -4:04:56 - KMT 1912 # Kingstown Mean Time -4:00 - AST # Sint Maarten # See America/Lower_Princes in southamerica. # Turks and Caicos # # From Chris Dunn in # https://bugs.debian.org/415007 # (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the # daylight saving dates for time changes have been adjusted to match # the recent U.S. change of dates. # # From Brian Inglis (2007-04-28): # http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] # there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three # rows before that there is an out of date entry for Oct: # "Eastern Standard Times Begins 2007 # Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" # indicating that the normal ET rules are followed. # From Paul Eggert (2014-08-19): # The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round. See: # http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm # Model this as a switch from EST/EDT to AST ... # From Chris Walton (2014-11-04): # ... the TCI government appears to have delayed the switch to # "permanent daylight saving time" by one year.... # http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm # # From the Turks & Caicos Cabinet (2017-07-20), heads-up from Steffen Thorsen: # ... agreed to the reintroduction in TCI of Daylight Saving Time (DST) # during the summer months and Standard Time, also known as Local # Time, during the winter months with effect from April 2018 ... # https://www.gov.uk/government/news/turks-and-caicos-post-cabinet-meeting-statement--3 # From Paul Eggert (2017-08-26): # The date of effect of the spring 2018 change appears to be March 11, # which makes more sense. See: Hamilton D. Time change back # by March 2018 for TCI. Magnetic Media. 2017-08-25. # http://magneticmediatv.com/2017/08/time-change-back-by-march-2018-for-tci/ # # From P Chan (2020-11-27): # Standard Time Declaration Order 2015 (L.N. 15/2015) # http://online.fliphtml5.com/fizd/czin/#p=2 # # Standard Time Declaration Order 2017 (L.N. 31/2017) # http://online.fliphtml5.com/fizd/dmcu/#p=2 # # From Tim Parenti (2020-12-05): # Although L.N. 31/2017 reads that it "shall come into operation at 2:00 a.m. # on 11th March 2018", a precise interpretation here poses some problems. The # order states that "the standard time to be observed throughout the Turks and # Caicos Islands shall be the same time zone as the Eastern United States of # America" and further clarifies "[f]or the avoidance of doubt" that it # "applies to the Eastern Standard Time as well as any changes thereto for # Daylight Saving Time." However, as clocks in Turks and Caicos approached # 02:00 -04, and thus the declared implementation time, it was still 01:00 EST # (-05), as DST in the Eastern US would not start until an hour later. # # Since it is unlikely that those on the islands switched their clocks twice in # the span of an hour, we assume instead that the adoption of EDT actually took # effect once clocks in the Eastern US had sprung forward, from 03:00 -04. # This discrepancy only affects the time zone abbreviation and DST flag for the # intervening hour, not wall clock times, as -04 was maintained throughout. # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Grand_Turk -4:44:32 - LMT 1890 #STDOFF -5:07:10.41 -5:07:10 - KMT 1912 Feb # Kingston Mean Time -5:00 - EST 1979 -5:00 US E%sT 2015 Mar 8 2:00 -4:00 - AST 2018 Mar 11 3:00 -5:00 US E%sT # British Virgin Is # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town -4:00 - AST # US Virgin Is # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie -4:00 - AST # Local Variables: # coding: utf-8 # End: @ 1.5 log @Merge tzdata2025c @ text @d1969 50 d2032 5 a2036 1 -8:00 Canada P%sT @ 1.4 log @Merge tzdata2025b @ text @d9 3 a11 3 # go ahead and edit the file (and please send any changes to # tz@@iana.org for general use in the future). For more, please see # the file CONTRIBUTING in the tz distribution. d1221 10 d2460 17 a2476 3 # # From Paul Eggert (2024-08-18): # For now, maintain the slightly-different history for Baja California, d2480 9 d2754 1 a2754 1 # http://gaceta.diputados.gob.mx/PDF/65/2a022/nov/20221124-VII.pdf d2769 1 a2769 1 # http://gaceta.diputados.gob.mx/PDF/65/2a022/nov/20221124-VII.pdf d2866 1 a2866 3 -8:00 - PST 1954 -8:00 CA P%sT 1961 -8:00 - PST 1976 @ 1.4.2.1 log @Pull up the following, requested by kre in ticket #215: external/public-domain/tz/dist/CONTRIBUTING up to 1.1.1.10 external/public-domain/tz/dist/Makefile up to 1.5 external/public-domain/tz/dist/NEWS up to 1.6 external/public-domain/tz/dist/README up to 1.3 external/public-domain/tz/dist/SECURITY up to 1.1.1.2 external/public-domain/tz/dist/TZDATA_VERSION up to 1.44 external/public-domain/tz/dist/africa up to 1.3 external/public-domain/tz/dist/antarctica up to 1.4 external/public-domain/tz/dist/asia up to 1.16 external/public-domain/tz/dist/australasia up to 1.12 external/public-domain/tz/dist/backzone up to 1.4 external/public-domain/tz/dist/calendars up to 1.1.1.3 external/public-domain/tz/dist/checknow.awk up to 1.4 external/public-domain/tz/dist/etcetera up to 1.4 external/public-domain/tz/dist/europe up to 1.5 external/public-domain/tz/dist/iso3166.tab up to 1.1.1.10 external/public-domain/tz/dist/leap-seconds.list up to 1.11 external/public-domain/tz/dist/leapseconds up to 1.11 external/public-domain/tz/dist/leapseconds.awk up to 1.1.1.15 external/public-domain/tz/dist/northamerica up to 1.5 external/public-domain/tz/dist/southamerica up to 1.5 external/public-domain/tz/dist/theory.html up to 1.5 external/public-domain/tz/dist/version up to 1.17 external/public-domain/tz/dist/zone1970.tab up to 1.5 external/public-domain/tz/dist/zonenow.tab up to 1.6 doc/3RDPARTY (apply patch) Import tzdata 2026a (using the 2026agtz data). @ text @d9 3 a11 3 # go ahead and edit the file, and please send any changes to # the public mailing list tz@@iana.org for general use in the future. # For more, please see the file CONTRIBUTING in the tz distribution. a1220 10 # From Rob van Gent (2025-07-23): # Another useful source for historical time zone information appears to be # a series of circulars with the title "Standard Time Throughout the World" # issued between 1925 and 1950 by the U.S. Bureau of Standards. # I found the following issues online: # https://nvlpubs.nist.gov/nistpubs/Legacy/circ/nbscircular280.pdf (1925) # https://nvlpubs.nist.gov/nistpubs/Legacy/circ/nbscircular399.pdf (1932) # https://nvlpubs.nist.gov/nistpubs/Legacy/circ/nbscircular406.pdf (1935) # https://nvlpubs.nist.gov/nistpubs/Legacy/circ/nbscircular496.pdf (1950) d2450 3 a2452 17 # From Alois Treindl (2025-07-29): # I did a quick newspaper archive research on https://hndm.iib.unam.mx/ # and found that Periódico Oficial del Estado de Baja California Norte # (1973-04-20) states clearly that DST was observed from last Sunday # in April to last Sunday in October.... I have a few more data from the # official bulletin for DST begin or end in Baja California 1964 1967 1969 # 1972 1973 (already sent) 1974 1975 1976 I do not know whether it is safe to # assume that it also applied in the years where I did not yet find proof. # The 1974 end of DST contains a reference to an Acuerdo of 1973-dec-20 which # I could not find.... One might assume that Baja California, which followed # US-CA in all these other yours, did the same. # # From Paul Eggert (2025-08-04): # Assume that Tijuana agreed with San Diego from 1953 through 1996, # as this agrees with Alois Treindl's data and with Shanks. # For now, keep the slightly-different 1948/1952 history for Baja California, a2455 9 # From Mark Schapiro, writing in The Nation (2002-10-28): # https://www.thenation.com/article/archive/sowing-disaster/ # When Mexican clocks were turned back for daylight saving time in the spring, # the Zapotecs refused to make the adjustment, insisting that they live in # "God's time," not in what they derisively call "Fox time," referring to # President Vicente Fox in far-off Mexico City. # From Paul Eggert (2025-08-04): # Unfortunately we have no data to track this informal practice. d2721 1 a2721 1 # https://gaceta.diputados.gob.mx/PDF/65/2022/nov/20221124-VII.pdf d2736 1 a2736 1 # https://gaceta.diputados.gob.mx/PDF/65/2022/nov/20221124-VII.pdf d2833 3 a2835 1 -8:00 CA P%sT 1967 @ 1.4.2.2 log @Pull up the following, requested by kre in ticket #261: external/public-domain/tz/dist/NEWS up to 1.7 external/public-domain/tz/dist/TZDATA_VERSION up to 1.45 external/public-domain/tz/dist/northamerica up to 1.6 external/public-domain/tz/dist/version up to 1.18 external/public-domain/tz/dist/zone.tab up to 1.5 external/public-domain/tz/dist/zone1970.tab up to 1.6 external/public-domain/tz/dist/zonenow.tab up to 1.7 Update to tzdata2026bgtz from https://github.com/JodaOrg/global-tz/releases/download/2026bgtz/tzdata2026bgtz.tar.gz One change of note: British Columbia moved to permanent -07 on 2026-03-09. @ text @a1968 50 # From Arthur David Olson (2026-03-02): # B. C. Gov News: “Adopting permanent daylight saving time: ‘Spring forward’ # on March 8 will be the last time change, ending twice-yearly clock changes.” # https://news.gov.bc.ca/releases/2026AG0013-000209 # # From Paul Eggert (2026-03-07): # The law says that 21 hours after the usual 2026-03-08 02:00 switch from # PST to PDT, the next day inaugurates the new standard time Pacific Time, # i.e., just one clock change but two name changes separated by 21 hours. # PT, the obvious abbreviation for Pacific Time, is one letter too short # to conform to TZDB’s (and POSIX’s) [-+[:alnum:]]{3,6} requirements. # I asked the BC government for advice, with no response. For now, do this: # 1. As a temporary hack, pretend that the BC law takes effect # not on 2026-03-09 at 00:00, but on 2026-11-01 at 02:00. # This pretense works around a limitation in CLDR v48.2 (2026-03-17), # which would otherwise say the interval uses “Pacific Standard Time”. # (Below, this temporary hack is marked “Temporary hack; see above.”) # Strictly speaking this hack is incorrect since the interval uses # standard time, but it does have the right UT offset and it # works around the CLDR limitation. We should be able to remove # the temporary hack after CLDR is fixed. # 2. After the BC law takes effect, model the time as MST sans DST. # We can change this later if another conforming non-numeric abbreviation # for Pacific Time becomes more popular. Possibilities include: # MST - the most compatible with existing software and practice, # and already used in parts of BC and in Yukon # PDT - almost as software-friendly, but confusing because it implies # it is DST and is paired with PST, whereas PT is standard time # PST - straightforward but even more confusing, # and will likely break much software that assumes PST is -08 # -07 - accurate and clear in itself, but makes BC look odd vs neighbors # CPT, CPST - for Canadian Pacific (Standard) Time, # by analogy with AEST in Australia # P-T - conforming approximation to “PT” # PT+ - like P-T but suggesting one-hour advance over PST # From Chris Walton (2026-03-15): # The Regional District of East Kootenay is planning to move to year-round # Mountain Standard Time (MST) on November 1, 2026.... # https://www.rdek.bc.ca/news/entry/rdek_board_moves_to_transition_to_year_round_mountain_standard_time # (2026-03-17): # The final decision East Kootenay made a few days ago may turn out not to # be final after all. They are going to reopen the debate next month! # https://www.cbc.ca/news/canada/british-columbia/what-time-is-it-in-the-east-kootenay-debate-9.7132624 # From Paul Eggert (2026-03-17): # Mayor Steve Fairbairn of Elkford asked the question be called a second time, # saying, “Pardon the pun, but this is not a time-sensitive issue.” # For now, merely mention the potential change in these comments. # If it happens it would likely affect clocks starting 2027-03-14 at 02:00. d1982 1 a1982 5 -8:00 Canada P%sT 2026 Mar 9 # Temporary hack; see above. -8:00 1:00 PDT 2026 Nov 1 02:00 # End of temporary hack. -7:00 - MST @ 1.3 log @Really update tzdata to 2025a (via 2025atgz as usual). The TZDATA2025ATGZ tagged vendor version in the repository is correct (contains this same data), but the files in HEAD are not. This fixes that problem. The couple of meaningful changes reported in the vendor import are actually made effective here, the rest of these updates are just to comments, or to files that are part of the tzdata distribution but are not used by NetBSD, except the expiry date on the leapseconds file(s) has been moved forward from late June (2025) to late December (as usually happens in the first tzdata update after each new 6-monthly IERS leap second bulletin, but is almost never mentioned). I am going to alter the way the tzdata2netbsd script works in a way that I am hoping will avoid this kind of issue (as well as previous partial updates that happened a few years back) - but there's no reasonable way for me to test whether that will work until the next tzdata update happens. @ text @d1618 9 @ 1.2 log @ Revert update to tzdata2025a - I botched it. A new update should be appearing within minutes. @ text @d30 1 a30 1 # From Paul Eggert (2018-03-20): d32 4 a35 1 # lines between time zones. The key individual who made time zones d2650 1 a2650 1 Rule Mexico 1931 only - April 30 0:00 1:00 D @ 1.1 log @Initial revision @ text @d1 2 d8 1 a8 1 # This data is by no means authoritative; if you think you know better, d10 2 a11 1 # tz@@iana.org for general use in the future). d29 25 a53 2 # His proposal was adopted by the railroads on 1883-11-18 at 12:00, # and the most of the country soon followed suit. d88 2 a89 2 # (Carnegie Library of Pittsburgh, 1927) # . d96 27 a122 4 # From Arthur David Olson: # US Daylight Saving Time ended on the last Sunday of *October* in 1974. # See, for example, the front page of the Saturday, 1974-10-26 # and Sunday, 1974-10-27 editions of the Washington Post. d131 2 a132 2 # An AltaVista search turned up # : d136 3 d173 1 a173 1 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S d182 1 a182 1 Rule US 1975 only - Feb 23 2:00 1:00 D a187 36 # From Arthur David Olson, 2005-12-19 # We generate the files specified below to guard against old files with # obsolete information being left in the time zone binary directory. # We limit the list to names that have appeared in previous versions of # this time zone package. # We do these as separate Zones rather than as Links to avoid problems if # a particular place changes whether it observes DST. # We put these specifications here in the northamerica file both to # increase the chances that they'll actually get compiled and to # avoid the need to duplicate the US rules in another file. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone EST -5:00 - EST Zone MST -7:00 - MST Zone HST -10:00 - HST Zone EST5EDT -5:00 US E%sT Zone CST6CDT -6:00 US C%sT Zone MST7MDT -7:00 US M%sT Zone PST8PDT -8:00 US P%sT # From Bob Devine (1988-01-28): # ...Alaska (and Hawaii) had the timezone names changed in 1967. # old new # Pacific Standard Time(PST) -same- # Yukon Standard Time(YST) -same- # Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) # Nome Standard Time (NT) Bering Standard Time (BST) # # ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. # The YST zone now covers nearly all of the state, AHST just part # of the Aleutian islands. No DST. # From Paul Eggert (1995-12-19): # The tables below use 'NST', not 'NT', for Nome Standard Time. # I invented 'CAWT' for Central Alaska War Time. d244 25 a268 4 # From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: # Public law 106-564 (2000-12-23) introduced the abbreviation # "Chamorro Standard Time" for time in Guam and the Northern Marianas. # See the file "australasia". d308 1 a308 1 # d315 14 d330 1 a330 1 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER d336 3 a338 2 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 d356 12 d369 1 a369 1 # http://www.legis.state.wi.us/statutes/Stat0175.pdf ... d378 1 a378 1 # http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf d380 36 a415 1 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER d422 2 a423 2 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 d425 2 a426 2 -6:00 Chicago C%sT 1936 Mar 1 2:00 -5:00 - EST 1936 Nov 15 2:00 d432 2 a433 2 Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 -7:00 US M%sT 1992 Oct 25 02:00 d442 2 a443 2 Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 -7:00 US M%sT 2003 Oct 26 02:00 d450 1 a450 1 # http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm d457 1 a457 2 # at 47 degrees 15' 51" N, 101 degrees 46' 40" W, which yields an offset # of 6h47'07". d459 2 a460 2 Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53 -7:00 US M%sT 2010 Nov 7 2:00 d471 14 a484 1 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER d490 2 a491 2 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 d503 1 a503 1 # Nevada (except West Wendover), Oregon (except the northern 3/4 of d505 31 d537 2 a538 2 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule CA 1948 only - Mar 14 2:00 1:00 D d540 1 a540 1 Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D d543 2 a544 2 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 d550 1 a550 1 # AK%sT is the modern abbreviation for -9:00 per USNO. d552 1 a552 1 # From Paul Eggert (2001-05-30): d555 10 a564 4 # This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, # also a Friday. Include only the time zone part of this transition, # ignoring the switch from Julian to Gregorian, since we can't represent # the Julian calendar. d566 1 a566 1 # As far as we know, none of the exact locations mentioned below were d568 9 a576 4 # (Yakutat was colonized by the Russians in 1799, but the settlement # was destroyed in 1805 by a Yakutat-kon war party.) However, there # were nearby inhabitants in some cases and for our purposes perhaps # it's best to simply use the official transition. d579 1 a579 1 # One opinion of the early-1980s turmoil in Alaska over time zones and d625 32 a656 2 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Juneau 15:02:19 - LMT 1867 Oct 18 d661 3 a663 3 -8:00 US P%sT 1980 Apr 27 2:00 -9:00 US Y%sT 1980 Oct 26 2:00 -8:00 US P%sT 1983 Oct 30 2:00 d666 1 a666 1 Zone America/Sitka 14:58:47 - LMT 1867 Oct 18 d671 1 a671 1 -8:00 US P%sT 1983 Oct 30 2:00 d674 1 a674 1 Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 18 d679 6 a684 3 -8:00 US P%sT 1983 Oct 30 2:00 -8:00 - PST Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18 d691 1 a691 1 Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18 d693 2 a694 4 -10:00 - CAT 1942 -10:00 US CAT/CAWT 1945 Aug 14 23:00u -10:00 US CAT/CAPT 1946 # Peace -10:00 - CAT 1967 Apr d696 1 a696 1 -10:00 US AH%sT 1983 Oct 30 2:00 d699 1 a699 1 Zone America/Nome 12:58:21 - LMT 1867 Oct 18 d705 1 a705 1 -11:00 US B%sT 1983 Oct 30 2:00 d708 1 a708 1 Zone America/Adak 12:13:21 - LMT 1867 Oct 18 d714 1 a714 1 -11:00 US B%sT 1983 Oct 30 2:00 d716 6 a721 2 -10:00 US HA%sT # The following switches don't quite make our 1970 cutoff. d736 1 a736 1 # made by William Robinson and seconded by Henry Swanson: Be it d748 1 a748 1 # http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf d769 1 a769 1 # Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is d779 5 a783 6 Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 #Schmitt&Cox -10:30 - HST 1933 Apr 30 2:00 #Laws 1933 -10:30 1:00 HDT 1933 May 21 12:00 #Laws 1933+12 -10:30 - HST 1942 Feb 09 2:00 #Schmitt&Cox+2 -10:30 1:00 HDT 1945 Sep 30 2:00 #Schmitt&Cox+2 -10:30 - HST 1947 Jun 8 2:00 #Schmitt&Cox+2 a785 2 Link Pacific/Honolulu Pacific/Johnston d809 5 a813 4 Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 -7:00 US M%sT 1944 Jan 1 00:01 -7:00 - MST 1944 Apr 1 00:01 -7:00 US M%sT 1944 Oct 1 00:01 d817 1 d836 3 a838 3 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 -8:00 US P%sT 1923 May 13 2:00 d840 1 a840 1 -7:00 - MST 1974 Feb 3 2:00 d846 17 a862 2 # What time is it in Indiana? (2006-03-01) # a887 3 # From Paul Eggert (2005-08-16): # http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006. d904 1 a904 1 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER d908 2 a909 2 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 d913 3 a915 3 -6:00 Indianapolis C%sT 1955 Apr 24 2:00 -5:00 - EST 1957 Sep 29 2:00 -6:00 - CST 1958 Apr 27 2:00 d923 1 a923 1 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER d928 2 a929 2 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 d931 1 a931 1 -6:00 Marengo C%sT 1961 Apr 30 2:00 d933 2 a934 2 -5:00 US E%sT 1974 Jan 6 2:00 -6:00 1:00 CDT 1974 Oct 27 2:00 d942 1 a942 1 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER d952 2 a953 2 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 d955 1 a955 1 -6:00 Vincennes C%sT 1964 Apr 26 2:00 d958 2 a959 2 -5:00 - EST 2006 Apr 2 2:00 -6:00 US C%sT 2007 Nov 4 2:00 d963 5 a967 5 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Perry 1946 only - Apr lastSun 2:00 1:00 D Rule Perry 1946 only - Sep lastSun 2:00 0 S Rule Perry 1953 1954 - Apr lastSun 2:00 1:00 D Rule Perry 1953 1959 - Sep lastSun 2:00 0 S d969 1 d971 3 a973 5 Rule Perry 1960 only - Oct lastSun 2:00 0 S Rule Perry 1961 only - Sep lastSun 2:00 0 S Rule Perry 1962 1963 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 d975 3 a977 2 -6:00 Perry C%sT 1964 Apr 26 2:00 -5:00 - EST 1969 d979 1 a979 1 -5:00 - EST 2006 Apr 2 2:00 d984 1 a984 1 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER d989 2 a990 2 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 d992 5 a996 5 -6:00 Pike C%sT 1965 Apr 25 2:00 -5:00 - EST 1966 Oct 30 2:00 -6:00 US C%sT 1977 Oct 30 2:00 -5:00 - EST 2006 Apr 2 2:00 -6:00 US C%sT 2007 Nov 4 2:00 d1005 1 a1005 1 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER d1011 2 a1012 2 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 d1014 4 a1017 4 -6:00 Starke C%sT 1962 Apr 29 2:00 -5:00 - EST 1963 Oct 27 2:00 -6:00 US C%sT 1991 Oct 27 2:00 -5:00 - EST 2006 Apr 2 2:00 d1022 1 a1022 1 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER d1027 2 a1028 2 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 d1030 1 a1030 1 -6:00 Pulaski C%sT 1961 Apr 30 2:00 d1033 2 a1034 2 -5:00 - EST 2006 Apr 2 2:00 -6:00 US C%sT 2007 Mar 11 2:00 d1038 3 a1040 3 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 -6:00 US C%sT 1954 Apr 25 2:00 d1046 16 d1064 1 a1064 1 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER d1067 1 a1067 1 Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D d1069 1 d1071 1 d1073 3 a1075 3 Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 d1079 1 a1079 1 -6:00 Louisville C%sT 1961 Jul 23 2:00 d1081 2 a1082 2 -5:00 US E%sT 1974 Jan 6 2:00 -6:00 1:00 CDT 1974 Oct 27 2:00 d1088 1 a1088 1 # d1107 1 a1107 1 # d1109 1 a1109 1 Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 d1133 1 a1133 1 # d1163 14 d1178 1 a1178 1 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER d1181 1 a1181 3 Rule Detroit 1967 only - Jun 14 2:00 1:00 D Rule Detroit 1967 only - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] d1183 1 a1183 1 -6:00 - CST 1915 May 15 2:00 d1186 3 a1188 1 -5:00 Detroit E%sT 1973 d1190 1 a1190 1 -5:00 - EST 1975 Apr 27 2:00 d1195 1 a1195 1 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER d1200 1 a1200 1 # Zone NAME GMTOFF RULES FORMAT [UNTIL] d1203 2 a1204 2 -6:00 Menominee C%sT 1969 Apr 27 2:00 -5:00 - EST 1973 Apr 29 2:00 d1221 3 a1223 2 # From Paul Eggert (2006-03-22): # A good source for time zone historical data outside the U.S. is d1226 1 d1228 2 a1229 2 # Gwillim Law writes that a good source # for recent time zone data is the International Air Transport d1232 4 a1235 1 # of the IATA's data after 1990. d1237 2 a1238 2 # Except where otherwise noted, Shanks & Pottenger is the source for # entries through 1990, and IATA SSIM is the source for entries afterwards. d1240 2 a1241 1 # Other sources occasionally used include: d1251 3 a1253 2 # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 # . d1291 1 a1291 1 # Unless otherwise specified, the data for Canada are all from Shanks d1299 1 a1299 1 # http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm d1303 1 a1303 1 # http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf d1307 1 a1307 1 # http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf d1311 1 a1311 1 # http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php d1325 1 a1325 1 # http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf d1338 1 a1338 1 # From Paul Eggert (2006-04-25): d1341 1 a1341 1 # d1345 3 a1347 4 # INMS, the Institute for National Measurement Standards in Ottawa, has # information about standard and daylight saving time zones in Canada. # # (updated periodically). d1369 1 a1369 1 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S d1384 7 a1390 5 # From Paul Eggert (2000-10-02): # Matthews and Vincent (1998) write that Labrador should use NST/NDT, # but the only part of Labrador that follows the rules is the # southeast corner, including Port Hope Simpson and Mary's Harbour, # but excluding, say, Black Tickle. d1392 1 a1392 1 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S d1440 2 a1441 2 # St John's has an apostrophe, but Posix file names can't have apostrophes. # Zone NAME GMTOFF RULES FORMAT [UNTIL] d1454 1 a1454 1 # Zone NAME GMTOFF RULES FORMAT [UNTIL] d1462 1 a1462 1 -3:30 StJohns N%sT 1966 Mar 15 2:00 d1467 2 a1468 1 # west Labrador, Nova Scotia, Prince Edward I d1470 9 a1478 1 # From Paul Eggert (2006-03-22): d1481 2 a1482 1 # Glace Bay, NS is the largest that we know of. d1487 8 a1494 1 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S d1536 1 a1536 1 # Zone NAME GMTOFF RULES FORMAT [UNTIL] d1540 1 a1540 1 -4:00 Halifax A%sT 1942 Feb 9 2:00s d1560 1 a1560 1 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S d1574 1 a1574 1 # Zone NAME GMTOFF RULES FORMAT [UNTIL] d1587 5 a1591 52 # From Paul Eggert (2013-08-30): # Since 1970 most of Quebec has been like Toronto. # However, because earlier versions of the tz database mistakenly relied on data # from Shanks & Pottenger saying that Quebec differed from Ontario after 1970, # a separate entry was created for most of Quebec. We're loath to lose # its pre-1970 info, even though the tz database is normally limited to # zones that differ after 1970, so keep this otherwise out-of-scope entry. # Matthews and Vincent (1998) also write that Quebec east of the -63 # meridian is supposed to observe AST, but residents as far east as # Natashquan use EST/EDT, and residents east of Natashquan use AST. # The Quebec department of justice writes in # "The situation in Minganie and Basse-Côte-Nord" # http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm # that the coastal strip from just east of Natashquan to Blanc-Sablon # observes Atlantic standard time all year round. # http://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en # says this common practice was codified into law as of 2007. # For lack of better info, guess this practice began around 1970, contra to # Shanks & Pottenger who have this region observing AST/ADT. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Mont 1917 only - Mar 25 2:00 1:00 D Rule Mont 1917 only - Apr 24 0:00 0 S Rule Mont 1919 only - Mar 31 2:30 1:00 D Rule Mont 1919 only - Oct 25 2:30 0 S Rule Mont 1920 only - May 2 2:30 1:00 D Rule Mont 1920 1922 - Oct Sun>=1 2:30 0 S Rule Mont 1921 only - May 1 2:00 1:00 D Rule Mont 1922 only - Apr 30 2:00 1:00 D Rule Mont 1924 only - May 17 2:00 1:00 D Rule Mont 1924 1926 - Sep lastSun 2:30 0 S Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D # The 1927-to-1937 rules can be expressed more simply as # Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D # Rule Mont 1927 1937 - Sep lastSat 24:00 0 S # The rules below avoid use of 24:00 # (which pre-1998 versions of zic cannot handle). Rule Mont 1927 only - May 1 0:00 1:00 D Rule Mont 1927 1932 - Sep lastSun 0:00 0 S Rule Mont 1928 1931 - Apr lastSun 0:00 1:00 D Rule Mont 1932 only - May 1 0:00 1:00 D Rule Mont 1933 1940 - Apr lastSun 0:00 1:00 D Rule Mont 1933 only - Oct 1 0:00 0 S Rule Mont 1934 1939 - Sep lastSun 0:00 0 S Rule Mont 1946 1973 - Apr lastSun 2:00 1:00 D Rule Mont 1945 1948 - Sep lastSun 2:00 0 S Rule Mont 1949 1950 - Oct lastSun 2:00 0 S Rule Mont 1951 1956 - Sep lastSun 2:00 0 S Rule Mont 1957 1973 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] a1594 7 Zone America/Montreal -4:54:16 - LMT 1884 -5:00 Mont E%sT 1918 -5:00 Canada E%sT 1919 -5:00 Mont E%sT 1942 Feb 9 2:00s -5:00 Canada E%sT 1946 -5:00 Mont E%sT 1974 -5:00 Canada E%sT a1597 8 # From Paul Eggert (2006-07-09): # Shanks & Pottenger write that since 1970 most of Ontario has been like # Toronto. # Thunder Bay skipped DST in 1973. # Many smaller locales did not observe peacetime DST until 1974; # Nipigon (EST) and Rainy River (CST) are the largest that we know of. # Far west Ontario is like Winnipeg; far east Quebec is like Halifax. a1609 10 # From Paul Eggert (1997-10-17): # Mark Brader writes that an article in the 1997-10-14 Toronto Star # says that Atikokan, Ontario currently does not observe DST, # but will vote on 11-10 whether to use EST/EDT. # He also writes that the Ontario Time Act (1990, Chapter T.9) # # says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. # Officially Atikokan is therefore on CST/CDT, and most likely this report # concerns a non-official time observed as a matter of local practice. d1611 4 a1614 37 # From Paul Eggert (2000-10-02): # Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and # New Osnaburgh observe CST all year, that Big Trout Lake observes # CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in # violation of the official Ontario rules. # # From Paul Eggert (2006-07-09): # Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the # 2005-07-21 Chronicle-Journal, which said: # # The clocks in Atikokan stay set on standard time year-round. # This means they spend about half the time on central time and # the other half on eastern time. # # For the most part, the system works, Mayor Dennis Brown said. # # "The majority of businesses in Atikokan deal more with Eastern # Canada, but there are some that deal with Western Canada," he # said. "I don't see any changes happening here." # # Walton also writes "Supposedly Pickle Lake and Mishkeegogamang # [New Osnaburgh] follow the same practice." # From Garry McKinnon (2006-07-14) via Chris Walton: # I chatted with a member of my board who has an outstanding memory # and a long history in Atikokan (and in the telecom industry) and he # can say for certain that Atikokan has been practicing the current # time keeping since 1952, at least. # From Paul Eggert (2006-07-17): # Shanks & Pottenger say that Atikokan has agreed with Rainy River # ever since standard time was introduced, but the information from # McKinnon sounds more authoritative. For now, assume that Atikokan # switched to EST immediately after WWII era daylight saving time # ended. This matches the old (less-populous) America/Coral_Harbour # entry since our cutoff date of 1970, so we can move # America/Coral_Harbour to the 'backward' file. a1617 11 # Currently the database has: # # # Ontario # # # From Paul Eggert (2006-07-09): # # Shanks & Pottenger write that since 1970 most of Ontario has been like # # Toronto. # # Thunder Bay skipped DST in 1973. # # Many smaller locales did not observe peacetime DST until 1974; # # Nipigon (EST) and Rainy River (CST) are the largest that we know of. # d1625 2 a1626 4 # Windsor is, of course, a lot larger than Nipigon. # # I only came across this incidentally. I don't know if Windsor began # observing DST when Detroit did, or in 1974, or on some other date. d1633 9 d1659 1 a1659 1 # Province Daylight saving time used d1664 12 a1675 12 # Montreal Lachine # Quebec Mont-Royal # Lévis Iberville # St. Lambert Cap de la Madelèine # Verdun Loretteville # Westmount Richmond # Outremont St. Jérôme # Longueuil Greenfield Park # Arvida Waterloo # Chambly-Canton Beaulieu # Melbourne La Tuque # St. Théophile Buckingham d1677 2 a1678 2 # the southerly part of the province. Not # used in the northwesterly part. d1687 1 a1687 1 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S d1699 7 a1705 20 # The 1927-to-1939 rules can be expressed more simply as # Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S # Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D # Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D # Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S # The rules below avoid use of Sun>=25 # (which pre-2004 versions of zic cannot handle). Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D Rule Toronto 1932 only - May 1 2:00 1:00 D Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D Rule Toronto 1933 only - Oct 1 2:00 0 S Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S Rule Toronto 1949 only - Nov lastSun 0:00 0 S Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D Rule Toronto 1950 only - Nov lastSun 2:00 0 S a1712 17 # From Paul Eggert (2003-07-27): # Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and # Port Arthur, Ontario, the principle of the Bill has been in # operation for the past three years, and in the City of Moose Jaw, # Saskatchewan, for one year." # From David Bryan via Tory Tronrud, Director/Curator, # Thunder Bay Museum (2003-11-12): # There is some suggestion, however, that, by-law or not, daylight # savings time was being practiced in Fort William and Port Arthur # before 1909.... [I]n 1910, the line between the Eastern and Central # Time Zones was permanently moved about two hundred miles west to # include the Thunder Bay area.... When Canada adopted daylight # savings time in 1916, Fort William and Port Arthur, having done so # already, did not change their clocks.... During the Second World # War,... [t]he cities agreed to implement DST during the summer # months for the remainder of the war years. d1714 1 a1714 1 # Zone NAME GMTOFF RULES FORMAT [UNTIL] d1717 1 a1717 1 -5:00 Toronto E%sT 1942 Feb 9 2:00s d1721 1 a1721 15 Zone America/Thunder_Bay -5:57:00 - LMT 1895 -6:00 - CST 1910 -5:00 - EST 1942 -5:00 Canada E%sT 1970 -5:00 Toronto E%sT 1973 -5:00 - EST 1974 -5:00 Canada E%sT Zone America/Nipigon -5:53:04 - LMT 1895 -5:00 Canada E%sT 1940 Sep 29 -5:00 1:00 EDT 1942 Feb 9 2:00s -5:00 Canada E%sT Zone America/Rainy_River -6:18:16 - LMT 1895 -6:00 Canada C%sT 1940 Sep 29 -6:00 1:00 CDT 1942 Feb 9 2:00s -6:00 Canada C%sT d1724 2 a1725 2 -6:00 1:00 CDT 1942 Feb 9 2:00s -6:00 Canada C%sT 1945 Sep 30 2:00 d1727 1 d1751 1 a1751 1 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S d1776 1 a1776 1 # Zone NAME GMTOFF RULES FORMAT [UNTIL] d1798 6 d1842 1 a1842 1 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S d1866 1 a1866 1 # Zone NAME GMTOFF RULES FORMAT [UNTIL] d1868 1 a1868 1 -7:00 Regina M%sT 1960 Apr lastSun 2:00 d1871 1 a1871 1 -7:00 Canada M%sT 1946 Apr lastSun 2:00 d1873 1 a1873 1 -7:00 Swift M%sT 1972 Apr lastSun 2:00 d1879 14 a1892 1 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S a1903 4 Rule Edm 1967 only - Apr lastSun 2:00 1:00 D Rule Edm 1967 only - Oct lastSun 2:00 0 S Rule Edm 1969 only - Apr lastSun 2:00 1:00 D Rule Edm 1969 only - Oct lastSun 2:00 0 S d1906 1 a1906 1 # Zone NAME GMTOFF RULES FORMAT [UNTIL] a1917 1 # Matthews and Vincent (1998) write that Creston is like Dawson Creek. d1919 27 a1945 1 # It seems though that (re: Creston) is not entirely correct: d1947 1 a1947 52 # From Chris Walton (2011-12-01): # There are two areas within the Canadian province of British Columbia # that do not currently observe daylight saving: # a) The Creston Valley (includes the town of Creston and surrounding area) # b) The eastern half of the Peace River Regional District # (includes the cities of Dawson Creek and Fort St. John) # Earlier this year I stumbled across a detailed article about the time # keeping history of Creston; it was written by Tammy Hardwick who is the # manager of the Creston & District Museum. The article was written in May 2009. # http://www.ilovecreston.com/?p=articles&t=spec&ar=260 # According to the article, Creston has not changed its clocks since June 1918. # i.e. Creston has been stuck on UTC-7 for 93 years. # Dawson Creek, on the other hand, changed its clocks as recently as April 1972. # Unfortunately the exact date for the time change in June 1918 remains # unknown and will be difficult to ascertain. I e-mailed Tammy a few months # ago to ask if Sunday June 2 was a reasonable guess. She said it was just # as plausible as any other date (in June). She also said that after writing the # article she had discovered another time change in 1916; this is the subject # of another article which she wrote in October 2010. # http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56 # Here is a summary of the three clock change events in Creston's history: # 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7) # Exact date unknown # 2. Oct 1916: switch to Pacific Standard Time (GMT-8) # Exact date in October unknown; Sunday October 1 is a reasonable guess. # 3. June 1918: switch to Pacific Daylight Time (GMT-7) # Exact date in June unknown; Sunday June 2 is a reasonable guess. # note#1: # On Oct 27/1918 when daylight saving ended in the rest of Canada, # Creston did not change its clocks. # note#2: # During WWII when the Federal Government legislated a mandatory clock change, # Creston did not oblige. # note#3: # There is no guarantee that Creston will remain on Mountain Standard Time # (UTC-7) forever. # The subject was debated at least once this year by the town Council. # http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html # During a period WWII, summer time (Daylight saying) was mandatory in Canada. # In Creston, that was handled by shifting the area to PST (-8:00) then applying # summer time to cause the offset to be -7:00, the same as it had been before # the change. It can be argued that the timezone abbreviation during this # period should be PDT rather than MST, but that doesn't seem important enough # (to anyone) to further complicate the rules. # The transition dates (and times) are guesses. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S d1954 1 a1954 1 Rule Vanc 1946 only - Oct 13 2:00 0 S d1957 1 a1957 1 # Zone NAME GMTOFF RULES FORMAT [UNTIL] d1963 7 a1969 1 -8:00 Vanc P%sT 1972 Aug 30 2:00 d1971 1 d1979 31 d2014 1 a2014 1 # c. 7 defines Yukon standard time as UTC-9. This is still valid; d2016 1 d2020 110 a2129 6 # Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go # with Englander. # From Chris Walton (2006-06-26): # Here is a link to the old daylight saving portion of the interpretation # act which was last updated in 1987: # http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf d2134 1 a2134 5 # # # From Antoine Leca (1999-09-06): # We then need to create a new timezone for the Kitikmeot region of Nunavut # to differentiate it from the Yellowknife region. d2138 2 a2139 35 # # (1999) reports that Pangnirtung operates on eastern time, # and that Coral Harbour does not observe DST. We don't know when # Pangnirtung switched to eastern time; we'll guess 1995. # From Rives McDow (1999-11-08): # On October 31, when the rest of Nunavut went to Central time, # Pangnirtung wobbled. Here is the result of their wobble: # # The following businesses and organizations in Pangnirtung use Central Time: # # First Air, Power Corp, Nunavut Construction, Health Center, RCMP, # Eastern Arctic National Parks, A & D Specialist # # The following businesses and organizations in Pangnirtung use Eastern Time: # # Hamlet office, All other businesses, Both schools, Airport operator # # This has made for an interesting situation there, which warranted the news. # No one there that I spoke with seems concerned, or has plans to # change the local methods of keeping time, as it evidently does not # really interfere with any activities or make things difficult locally. # They plan to celebrate New Year's turn-over twice, one hour apart, # so it appears that the situation will last at least that long. # The Nunavut Intergovernmental Affairs hopes that they will "come to # their senses", but the locals evidently don't see any problem with # the current state of affairs. # From Michaela Rodrigue, writing in the # Nunatsiaq News (1999-11-19) # : # Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, # central - or Nunavut time - for government offices, and eastern time # for municipal offices and schools.... Igloolik [was similar but then] # made the switch to central time on Saturday, Nov. 6. d2153 1 a2153 1 # From d2182 1 a2182 4 # According to maps at # http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg # http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg # (both dated 2003), and d2191 1 a2191 1 # From Paul Eggert (2005-07-26): d2193 3 a2195 1 # daylight saving only during wartime. d2266 25 a2290 1 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S d2298 2 a2299 4 Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD Rule NT_YK 1965 only - Oct lastSun 2:00 0 S Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S d2301 3 a2303 7 # Zone NAME GMTOFF RULES FORMAT [UNTIL] # aka Panniqtuuq Zone America/Pangnirtung 0 - zzz 1921 # trading post est. -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 -5:00 Canada E%sT 1999 Oct 31 2:00 -6:00 Canada C%sT 2000 Oct 29 2:00 -5:00 Canada E%sT d2305 3 a2307 3 Zone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est. -5:00 NT_YK E%sT 1999 Oct 31 2:00 -6:00 Canada C%sT 2000 Oct 29 2:00 d2310 5 a2314 5 Zone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded -6:00 NT_YK C%sT 2000 Oct 29 2:00 -5:00 - EST 2001 Apr 1 3:00 -6:00 Canada C%sT 2006 Oct 29 2:00 -5:00 - EST 2007 Mar 11 3:00 d2317 3 a2319 3 Zone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded -6:00 NT_YK C%sT 2000 Oct 29 2:00 -5:00 - EST 2001 Apr 1 3:00 d2322 5 a2326 8 Zone America/Cambridge_Bay 0 - zzz 1920 # trading post est.? -7:00 NT_YK M%sT 1999 Oct 31 2:00 -6:00 Canada C%sT 2000 Oct 29 2:00 -5:00 - EST 2000 Nov 5 0:00 -6:00 - CST 2001 Apr 1 3:00 -7:00 Canada M%sT Zone America/Yellowknife 0 - zzz 1935 # Yellowknife founded? -7:00 NT_YK M%sT 1980 d2328 2 a2329 2 Zone America/Inuvik 0 - zzz 1953 # Inuvik founded -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 d2333 5 a2337 3 -9:00 NT_YK Y%sT 1966 Jul 1 2:00 -8:00 NT_YK P%sT 1980 -8:00 Canada P%sT d2339 5 a2343 3 -9:00 NT_YK Y%sT 1973 Oct 28 0:00 -8:00 NT_YK P%sT 1980 -8:00 Canada P%sT d2350 1 a2350 1 # From Paul Eggert (2001-03-05): d2354 1 a2354 1 # . d2369 75 d2474 2 a2475 2 # "Diario Oficial: Time Zone Changeover" (1996-01-04) # . d2500 1 a2500 1 # d2514 1 a2514 1 # d2520 1 a2520 1 # d2578 1 a2578 1 # http://www.timeanddate.com/news/time/north-mexico-dst-change.html d2598 51 a2648 1 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S d2661 3 a2663 3 Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D Rule Mexico 2002 max - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] d2665 4 a2668 2 Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 -6:00 - CST 1981 Dec 23 d2670 2 a2671 1 -6:00 Mexico C%sT d2673 3 a2675 3 Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 -6:00 - CST 1981 Dec 23 -5:00 - EST 1982 Dec 2 d2677 9 a2685 2 # Coahuila, Durango, Nuevo León, Tamaulipas (near US border) Zone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 d2690 5 a2694 2 # Coahuila, Durango, Nuevo León, Tamaulipas (away from US border) Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 d2699 2 a2700 2 Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 -7:00 - MST 1927 Jun 10 23:00 d2702 2 a2703 4 -7:00 - MST 1931 May 1 23:00 -6:00 - CST 1931 Oct -7:00 - MST 1932 Apr 1 -6:00 Mexico C%sT 2001 Sep 30 02:00 d2706 6 a2711 3 # Chihuahua (near US border) Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 -7:00 - MST 1927 Jun 10 23:00 d2713 1 a2713 3 -7:00 - MST 1931 May 1 23:00 -6:00 - CST 1931 Oct -7:00 - MST 1932 Apr 1 d2716 1 a2716 1 -6:00 - CST 1998 Apr Sun>=1 3:00 d2718 2 d2721 15 d2737 2 a2738 2 Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 -7:00 - MST 1927 Jun 10 23:00 d2740 1 a2740 3 -7:00 - MST 1931 May 1 23:00 -6:00 - CST 1931 Oct -7:00 - MST 1932 Apr 1 d2743 3 a2745 2 -6:00 - CST 1998 Apr Sun>=1 3:00 -7:00 Mexico M%sT d2747 2 a2748 2 Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 -7:00 - MST 1927 Jun 10 23:00 d2750 1 a2750 3 -7:00 - MST 1931 May 1 23:00 -6:00 - CST 1931 Oct -7:00 - MST 1932 Apr 1 d2752 1 a2752 2 -7:00 - MST 1949 Jan 14 -8:00 - PST 1970 d2756 11 d2794 2 a2795 3 # Mazatlán Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 -7:00 - MST 1927 Jun 10 23:00 d2797 1 a2797 3 -7:00 - MST 1931 May 1 23:00 -6:00 - CST 1931 Oct -7:00 - MST 1932 Apr 1 d2799 2 a2800 15 -7:00 - MST 1949 Jan 14 -8:00 - PST 1970 -7:00 Mexico M%sT # Bahía de Banderas Zone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00 -7:00 - MST 1927 Jun 10 23:00 -6:00 - CST 1930 Nov 15 -7:00 - MST 1931 May 1 23:00 -6:00 - CST 1931 Oct -7:00 - MST 1932 Apr 1 -6:00 - CST 1942 Apr 24 -7:00 - MST 1949 Jan 14 -8:00 - PST 1970 -7:00 Mexico M%sT 2010 Apr 4 2:00 d2803 2 a2804 2 # Baja California (near US border) Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 d2806 1 a2806 1 -8:00 - PST 1927 Jun 10 23:00 d2812 1 a2812 1 -8:00 1:00 PPT 1945 Nov 12 # Peace d2815 6 a2828 19 # Baja California (away from US border) Zone America/Santa_Isabel -7:39:28 - LMT 1922 Jan 1 0:20:32 -7:00 - MST 1924 -8:00 - PST 1927 Jun 10 23:00 -7:00 - MST 1930 Nov 15 -8:00 - PST 1931 Apr 1 -8:00 1:00 PDT 1931 Sep 30 -8:00 - PST 1942 Apr 24 -8:00 1:00 PWT 1945 Aug 14 23:00u -8:00 1:00 PPT 1945 Nov 12 # Peace -8:00 - PST 1948 Apr 5 -8:00 1:00 PDT 1949 Jan 14 -8:00 - PST 1954 -8:00 CA P%sT 1961 -8:00 - PST 1976 -8:00 US P%sT 1996 -8:00 Mexico P%sT 2001 -8:00 US P%sT 2002 Feb 20 -8:00 Mexico P%sT d2841 11 d2858 3 a2860 1 # See America/Port_of_Spain. d2862 2 a2863 2 # Antigua and Barbuda # Zone NAME GMTOFF RULES FORMAT [UNTIL] d2868 7 a2874 10 # Bahamas # # For 1899 Milne gives -5:09:29.5; round that. # # From Sue Williams (2006-12-07): # The Bahamas announced about a month ago that they plan to change their DST # rules to sync with the U.S. starting in 2007.... # http://www.jonesbahamas.com/?c=45&a=10412 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S d2877 2 a2878 1 # Zone NAME GMTOFF RULES FORMAT [UNTIL] d2885 1 a2885 1 # For 1899 Milne gives -3:58:29.2; round that. d2887 36 a2922 1 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S d2928 5 a2932 3 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Barbados -3:58:29 - LMT 1924 # Bridgetown -3:58:29 - BMT 1932 # Bridgetown Mean Time d2936 51 a2986 11 # Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S Rule Belize 1973 only - Dec 5 0:00 1:00 D Rule Belize 1974 only - Feb 9 0:00 0 S Rule Belize 1982 only - Dec 18 0:00 1:00 D Rule Belize 1983 only - Feb 12 0:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Belize -5:52:48 - LMT 1912 Apr -6:00 Belize C%sT d2990 1 d2992 69 a3060 1 # Bermuda dockyard, Ireland I; round that. a3062 1 d3069 23 a3091 3 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton -4:00 - AST 1974 Apr 28 2:00 d3095 3 d3099 3 a3101 3 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown -5:07:11 - KMT 1912 Feb # Kingston Mean Time d3106 1 a3106 1 # Milne gives -5:36:13.3 as San José mean time; round to nearest. d3108 1 a3108 1 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S d3117 3 a3119 2 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Costa_Rica -5:36:13 - LMT 1890 # San José d3182 1 a3182 1 # http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES d3207 1 a3207 1 # http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html d3254 1 a3254 1 # http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html d3264 1 a3264 1 # http://www.timeanddate.com/news/time/cuba-time-changes-2011.html d3274 1 a3274 1 # http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html d3283 1 a3283 1 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S d3324 1 a3324 1 # Zone NAME GMTOFF RULES FORMAT [UNTIL] d3330 3 a3332 1 # See America/Port_of_Spain. d3354 8 a3361 8 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule DR 1966 only - Oct 30 0:00 1:00 D Rule DR 1967 only - Feb 28 0:00 0 S Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD Rule DR 1970 only - Feb 21 0:00 0 S Rule DR 1971 only - Jan 20 0:00 0 S Rule DR 1972 1974 - Jan 21 0:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] d3364 3 a3366 3 -5:00 DR E%sT 1974 Oct 27 -4:00 - AST 2000 Oct 29 02:00 -5:00 US E%sT 2000 Dec 3 01:00 d3371 1 a3371 1 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S d3376 2 a3377 2 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador d3381 4 d3386 4 d3391 2 d3394 1 a3394 1 # See America/Port_of_Spain. d3408 1 a3408 1 # . d3410 1 a3410 1 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S d3419 1 a3419 1 # Zone NAME GMTOFF RULES FORMAT [UNTIL] d3478 14 a3491 1 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S d3501 5 a3505 3 Rule Haiti 2012 max - Mar Sun>=8 2:00 1:00 D Rule Haiti 2012 max - Nov Sun>=1 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] d3526 2 a3527 2 # Also see Diario El Heraldo, The country returns to standard time (2006-08-08) # . d3539 1 a3539 1 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S d3544 1 a3544 1 # Zone NAME GMTOFF RULES FORMAT [UNTIL] d3553 17 a3569 5 # island". Go with Milne. Round to the nearest second as required by zic. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Jamaica -5:07:11 - LMT 1890 # Kingston -5:07:11 - KMT 1912 Feb # Kingston Mean Time -5:00 - EST 1974 Apr 28 2:00 d3574 3 a3576 3 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France -4:04:20 - FFMT 1911 May # Fort-de-France MT d3582 3 a3584 1 # See America/Port_of_Spain. d3607 1 a3607 1 # and elsewhere, says (fifth paragraph, translated from Spanish): "The last d3633 1 a3633 1 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S d3640 1 a3640 1 # Zone NAME GMTOFF RULES FORMAT [UNTIL] d3645 1 a3645 1 -6:00 Nic C%sT 1992 Jan 1 4:00 d3652 1 a3652 1 # Zone NAME GMTOFF RULES FORMAT [UNTIL] d3654 1 a3654 1 -5:19:36 - CMT 1908 Apr 22 # Colón Mean Time d3659 2 a3660 2 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan d3666 4 d3671 4 a3674 1 # See America/Port_of_Spain. d3678 2 a3679 2 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre d3681 2 a3682 2 -3:00 - PMST 1987 # Pierre & Miquelon Time -3:00 Canada PM%sT d3684 8 a3691 2 # St Vincent and the Grenadines # See America/Port_of_Spain. d3696 1 a3696 1 # d3708 46 a3753 12 # # From Paul Eggert (2006-05-01): # Shanks & Pottenger say they use US DST rules, but IATA SSIM (1991/1998) # says they switch at midnight. Go with Shanks & Pottenger. # # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule TC 1979 1986 - Apr lastSun 2:00 1:00 D Rule TC 1979 2006 - Oct lastSun 2:00 0 S Rule TC 1987 2006 - Apr Sun>=1 2:00 1:00 D Rule TC 2007 max - Mar Sun>=8 2:00 1:00 D Rule TC 2007 max - Nov Sun>=1 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] d3755 6 a3760 2 -5:07:11 - KMT 1912 Feb # Kingston Mean Time -5:00 TC E%sT d3763 3 a3765 2 # Virgin Is # See America/Port_of_Spain. d3767 4 @ 1.1.1.1 log @Import tzdata2014f from ftp://ftp.iana.org/tz/releases/tzdata2014f.tar.gz and NEWS file from https://github.com/eggert/tz/raw/2014f/NEWS. NetBSD's tzdata code is being moved from src/share/zoneinfo to src/external/public-domain/tz/dist, to simplify future maintenance. This is the same version of tzata that was previously imported to src/share/zoneinfo. The NEWS file has been added to the import, although it is not distributed in the tzdata2014f.tar.gz file. @ text @@ 1.1.1.1.4.1 log @Pull up following revision(s) (requested by apb in ticket #107): doc/3RDPARTY: patch external/public-domain/tz/tzdata2netbsd: patch external/public-domain/tz/dist/CONTRIBUTING: patch external/public-domain/tz/dist/Makefile: patch external/public-domain/tz/dist/NEWS: patch external/public-domain/tz/dist/README: patch external/public-domain/tz/dist/Theory: patch external/public-domain/tz/dist/africa: patch external/public-domain/tz/dist/antarctica: patch external/public-domain/tz/dist/asia: patch external/public-domain/tz/dist/australasia: patch external/public-domain/tz/dist/backward: patch external/public-domain/tz/dist/backzone: patch external/public-domain/tz/dist/checktab.awk: patch external/public-domain/tz/dist/europe: patch external/public-domain/tz/dist/leapseconds: patch external/public-domain/tz/dist/leapseconds.awk: patch external/public-domain/tz/dist/northamerica: patch external/public-domain/tz/dist/southamerica: patch external/public-domain/tz/dist/zone.tab: patch external/public-domain/tz/dist/zone1970.tab: patch external/public-domain/tz/dist/zoneinfo2tdf.pl: patch Import tzdata2014g from ftp://ftp.iana.org/tz/releases/tzdata2014g.tar.gz This includes changes for Turks & Caicos that will take effect on 2014-11-02, changes that affect times in the past, and some re-organisation of the source files. See src/external/public-domain/tz/dist/NEWS for more details. @ text @d6 1 a6 1 # This file is by no means authoritative; if you think you know better, d8 1 a8 2 # tz@@iana.org for general use in the future). For more, please see # the file CONTRIBUTING in the tz distribution. d62 2 a63 2 # (Carnegie Library of Pittsburgh, 1927). # http://www.clpgh.org/exhibit/dst.html d82 2 a83 2 # An AltaVista search turned up: # http://rowayton.org/rhs/hstaug45.html d271 1 a271 1 # http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1 d326 2 a327 2 -6:00 Chicago C%sT 1936 Mar 1 2:00 -5:00 - EST 1936 Nov 15 2:00 d334 1 a334 1 -7:00 US M%sT 1992 Oct 25 2:00 d343 2 a344 2 Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 -7:00 US M%sT 2003 Oct 26 2:00 d361 2 a362 2 Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53 -7:00 US M%sT 2010 Nov 7 2:00 d478 3 a480 3 -8:00 US P%sT 1980 Apr 27 2:00 -9:00 US Y%sT 1980 Oct 26 2:00 -8:00 US P%sT 1983 Oct 30 2:00 d488 1 a488 1 -8:00 US P%sT 1983 Oct 30 2:00 d496 1 a496 1 -8:00 US P%sT 1983 Oct 30 2:00 d512 1 a512 1 -10:00 US AH%sT 1983 Oct 30 2:00 d521 1 a521 1 -11:00 US B%sT 1983 Oct 30 2:00 d530 1 a530 1 -11:00 US B%sT 1983 Oct 30 2:00 d548 1 a548 1 # made by William Robinson and seconded by Henry Swanson: Be it d581 1 a581 1 # Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is d591 6 a596 7 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 -10:30 - HST 1933 Apr 30 2:00 -10:30 1:00 HDT 1933 May 21 12:00 -10:30 - HST 1942 Feb 9 2:00 -10:30 1:00 HDT 1945 Sep 30 2:00 -10:30 - HST 1947 Jun 8 2:00 d598 1 a623 1 # Zone NAME GMTOFF RULES FORMAT [UNTIL] d625 3 a627 3 -7:00 US M%sT 1944 Jan 1 0:01 -7:00 - MST 1944 Apr 1 0:01 -7:00 US M%sT 1944 Oct 1 0:01 d651 1 a651 1 -8:00 US P%sT 1923 May 13 2:00 d653 1 a653 1 -7:00 - MST 1974 Feb 3 2:00 d659 2 a660 1 # http://en.wikipedia.org/wiki/Time_in_Indiana d686 3 d710 1 a710 1 Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 d714 3 a716 3 -6:00 Indianapolis C%sT 1955 Apr 24 2:00 -5:00 - EST 1957 Sep 29 2:00 -6:00 - CST 1958 Apr 27 2:00 d732 1 a732 1 -6:00 Marengo C%sT 1961 Apr 30 2:00 d734 2 a735 2 -5:00 US E%sT 1974 Jan 6 2:00 -6:00 1:00 CDT 1974 Oct 27 2:00 d756 1 a756 1 -6:00 Vincennes C%sT 1964 Apr 26 2:00 d759 2 a760 2 -5:00 - EST 2006 Apr 2 2:00 -6:00 US C%sT 2007 Nov 4 2:00 d777 1 a777 1 -6:00 Perry C%sT 1964 Apr 26 2:00 d780 1 a780 1 -5:00 - EST 2006 Apr 2 2:00 d793 5 a797 5 -6:00 Pike C%sT 1965 Apr 25 2:00 -5:00 - EST 1966 Oct 30 2:00 -6:00 US C%sT 1977 Oct 30 2:00 -5:00 - EST 2006 Apr 2 2:00 -6:00 US C%sT 2007 Nov 4 2:00 d815 4 a818 4 -6:00 Starke C%sT 1962 Apr 29 2:00 -5:00 - EST 1963 Oct 27 2:00 -6:00 US C%sT 1991 Oct 27 2:00 -5:00 - EST 2006 Apr 2 2:00 d831 1 a831 1 -6:00 Pulaski C%sT 1961 Apr 30 2:00 d834 2 a835 2 -5:00 - EST 2006 Apr 2 2:00 -6:00 US C%sT 2007 Mar 11 2:00 d841 1 a841 1 -6:00 US C%sT 1954 Apr 25 2:00 d862 1 a862 1 -6:00 Louisville C%sT 1961 Jul 23 2:00 d864 2 a865 2 -5:00 US E%sT 1974 Jan 6 2:00 -6:00 1:00 CDT 1974 Oct 27 2:00 d871 1 a871 1 # http://www.lake-cumberland.com/life/archive/news990129time.shtml d890 1 a890 1 # http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22 d916 1 a916 1 # http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15 d954 1 a954 1 -6:00 - CST 1915 May 15 2:00 d959 1 a959 1 -5:00 - EST 1975 Apr 27 2:00 d972 2 a973 2 -6:00 Menominee C%sT 1969 Apr 27 2:00 -5:00 - EST 1973 Apr 29 2:00 d1053 1 a1053 1 # Unless otherwise specified, the data entries for Canada are all from Shanks d1103 1 a1103 1 # http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp d1109 1 a1109 1 # http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php d1223 1 a1223 1 -3:30 StJohns N%sT 1966 Mar 15 2:00 d1284 1 a1284 1 -4:00 Halifax A%sT 1942 Feb 9 2:00s d1364 12 a1375 4 Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D Rule Mont 1927 1937 - Sep lastSat 24:00 0 S Rule Mont 1938 1940 - Apr lastSun 0:00 1:00 D Rule Mont 1938 1939 - Sep lastSun 0:00 0 S d1389 1 a1389 1 -5:00 Mont E%sT 1942 Feb 9 2:00s d1422 1 a1422 1 # http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html d1512 1 a1512 1 # Province Daylight saving time used d1517 12 a1528 12 # Montreal Lachine # Quebec Mont-Royal # Lévis Iberville # St. Lambert Cap de la Madelèine # Verdun Loretteville # Westmount Richmond # Outremont St. Jérôme # Longueuil Greenfield Park # Arvida Waterloo # Chambly-Canton Beaulieu # Melbourne La Tuque # St. Théophile Buckingham d1530 2 a1531 2 # the southerly part of the province. Not # used in the northwesterly part. d1600 1 a1600 1 -5:00 Toronto E%sT 1942 Feb 9 2:00s d1613 1 a1613 1 -5:00 1:00 EDT 1942 Feb 9 2:00s d1617 1 a1617 1 -6:00 1:00 CDT 1942 Feb 9 2:00s d1621 2 a1622 2 -6:00 1:00 CDT 1942 Feb 9 2:00s -6:00 Canada C%sT 1945 Sep 30 2:00 d1758 1 a1758 1 -7:00 Regina M%sT 1960 Apr lastSun 2:00 d1761 1 a1761 1 -7:00 Canada M%sT 1946 Apr lastSun 2:00 d1763 1 a1763 1 -7:00 Swift M%sT 1972 Apr lastSun 2:00 d1821 3 a1823 3 # as plausible as any other date (in June). She also said that after writing # the article she had discovered another time change in 1916; this is the # subject of another article which she wrote in October 2010. d1830 1 a1830 1 # Exact date in October unknown; Sunday October 1 is a reasonable guess. d1870 1 a1870 1 -8:00 Vanc P%sT 1972 Aug 30 2:00 d1898 1 a1898 1 # http://www.nunatsiaq.com/nunavut/nvt90903_13.html d1906 1 a1906 1 # http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html d1935 2 a1936 2 # Nunatsiaq News (1999-11-19): # http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html d2084 3 a2086 3 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 -5:00 Canada E%sT 1999 Oct 31 2:00 -6:00 Canada C%sT 2000 Oct 29 2:00 d2090 2 a2091 2 -5:00 NT_YK E%sT 1999 Oct 31 2:00 -6:00 Canada C%sT 2000 Oct 29 2:00 d2095 4 a2098 4 -6:00 NT_YK C%sT 2000 Oct 29 2:00 -5:00 - EST 2001 Apr 1 3:00 -6:00 Canada C%sT 2006 Oct 29 2:00 -5:00 - EST 2007 Mar 11 3:00 d2102 2 a2103 2 -6:00 NT_YK C%sT 2000 Oct 29 2:00 -5:00 - EST 2001 Apr 1 3:00 d2107 4 a2110 4 -7:00 NT_YK M%sT 1999 Oct 31 2:00 -6:00 Canada C%sT 2000 Oct 29 2:00 -5:00 - EST 2000 Nov 5 0:00 -6:00 - CST 2001 Apr 1 3:00 d2116 1 a2116 1 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 d2120 1 a2120 1 -9:00 NT_YK Y%sT 1966 Jul 1 2:00 d2124 1 a2124 1 -9:00 NT_YK Y%sT 1973 Oct 28 0:00 d2137 1 a2137 1 # http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/ d2182 2 a2183 2 # "Diario Oficial: Time Zone Changeover" (1996-01-04). # http://mexico-travel.com/extra/timezone_eng.html d2208 1 a2208 1 # http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001 d2222 1 a2222 1 # http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre d2228 1 a2228 1 # http://www.latimes.com/news/nation/20010303/t000018766.html d2344 1 a2344 1 Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 d2350 1 a2350 1 -6:00 Mexico C%sT 2001 Sep 30 2:00 d2354 1 a2354 1 Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 d2362 1 a2362 1 -6:00 - CST 1998 Apr Sun>=1 3:00 d2374 1 a2374 1 -6:00 - CST 1998 Apr Sun>=1 3:00 d2438 1 a2438 1 -7:00 Mexico M%sT 2010 Apr 4 2:00 d2534 2 a2535 2 Zone America/Barbados -3:58:29 - LMT 1924 # Bridgetown -3:58:29 - BMT 1932 # Bridgetown Mean Time d2565 2 a2566 2 Zone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton -4:00 - AST 1974 Apr 28 2:00 d2572 2 a2573 2 Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown -5:07:11 - KMT 1912 Feb # Kingston Mean Time d2590 1 a2590 1 Zone America/Costa_Rica -5:36:13 - LMT 1890 # San José d2834 2 a2835 2 -4:00 - AST 2000 Oct 29 2:00 -5:00 US E%sT 2000 Dec 3 1:00 d2846 1 a2846 1 Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador d2867 1 a2867 1 # http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf d2970 2 a2971 2 # Also see Diario El Heraldo, The country returns to standard time (2006-08-08). # http://www.elheraldo.hn/nota.php?nid=54941&sec=12 d2999 1 a2999 1 Zone America/Jamaica -5:07:11 - LMT 1890 # Kingston d3001 1 a3001 1 -5:00 - EST 1974 Apr 28 2:00 d3007 2 a3008 2 Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France -4:04:20 - FFMT 1911 May # Fort-de-France MT d3037 1 a3037 1 # and elsewhere, says (fifth paragraph, translated from Spanish): "The last d3075 1 a3075 1 -6:00 Nic C%sT 1992 Jan 1 4:00 d3084 1 a3084 1 -5:19:36 - CMT 1908 Apr 22 # Colón Mean Time d3090 1 a3090 1 Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan d3102 1 a3102 1 Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre d3113 1 a3113 1 # http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007 d3126 3 a3128 4 # From Paul Eggert (2014-08-19): # The 2014-08-13 Cabinet meeting decided to stay on UTC-4 year-round. See: # http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm # Model this as a switch from EST/EDT to AST on 2014-11-02 at 02:00. d3130 6 d3138 2 a3139 4 -5:07:11 - KMT 1912 Feb # Kingston Mean Time -5:00 - EST 1979 -5:00 US E%sT 2014 Nov 2 2:00 -4:00 - AST @ 1.1.1.1.4.2 log @Apply patch (requested by apb in ticket #245): Update tzdata from 2014g to 2014j. Some of the changes are: * A new Zone Pacific/Bougainville, for the part of Papua New Guinea that plans to switch from UTC+10 to UTC+11 on 2014-12-28 at 02:00. * Changes for Fiji, Belarus, and Turks & Caicos that take effect at various times in 2014. * Changes to historical data. @ text @a279 6 # From Paul Eggert (2014-09-06): # Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208 # says that New York City Hall time was 3 minutes 58.4 seconds fast of # Eastern time (i.e., -4:56:01.6) just before the 1883 switch. Round to the # nearest second. d988 2 a989 3 # From Paul Eggert (2014-10-31): # # Unless otherwise specified, the source for data through 1990 is: a991 1 # Unfortunately this book contains many errors and cites no sources. d997 4 a1000 2 # of the IATA's data after 1990. Except where otherwise noted, # IATA SSIM is the source for entries after 1990. d1098 1 a1098 1 # From Paul Eggert (2014-10-18): d1101 1 a1101 1 # http://www.canadiangeographic.ca/Magazine/SO98/alacarte.asp d1105 4 a1108 3 # National Research Council Canada maintains info about time zones and DST. # http://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html # http://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5 d1973 4 a1976 1 # According to ... d1985 1 a1985 1 # From Paul Eggert (2014-10-17): d1987 1 a1987 3 # daylight saving only during wartime. Gwillim Law's email also # mentioned maps now maintained by National Research Council Canada; # see above for an up-to-date link. a2987 11 # # Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but # Lance Neita writes that Prime Minister Michael Manley decreed it January 5. # Assume Neita meant Jan 6 02:00, the same as the US. Neita also writes that # Manley's supporters associated this act with Manley's nickname "Joshua" # (recall that in the Bible the sun stood still at Joshua's request), # and with the Rod of Correction which Manley said he had received from # Haile Selassie, Emperor of Ethiopia. See: # Neita L. The politician in all of us. Jamaica Observer 2014-09-20 # http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647 # d2991 1 a2991 1 -5:00 - EST 1974 d3119 1 a3119 5 # Model this as a switch from EST/EDT to AST ... # From Chris Walton (2014-11-04): # ... the TCI government appears to have delayed the switch to # "permanent daylight saving time" by one year.... # http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm d3125 1 a3125 1 -5:00 US E%sT 2015 Nov Sun>=1 2:00 @ 1.1.1.1.4.3 log @Pull up following revision(s) (requested by apb in ticket #638): doc/3RDPARTY: patch external/public-domain/tz/dist/Makefile: up to revision 1.1.1.7 external/public-domain/tz/dist/NEWS: up to revision 1.1.1.7 external/public-domain/tz/dist/Theory: up to revision 1.1.1.3 external/public-domain/tz/dist/antarctica: up to revision 1.1.1.3 external/public-domain/tz/dist/asia: up to revision 1.1.1.7 external/public-domain/tz/dist/australasia: up to revision 1.1.1.5 external/public-domain/tz/dist/backward: up to revision 1.1.1.3 external/public-domain/tz/dist/backzone: up to revision 1.1.1.6 external/public-domain/tz/dist/checklinks.awk: up to revision 1.1.1.1 external/public-domain/tz/dist/checktab.awk: up to revision 1.1.1.6 external/public-domain/tz/dist/europe: up to revision 1.1.1.7 external/public-domain/tz/dist/leap-seconds.list: up to revision 1.1.1.3 external/public-domain/tz/dist/leapseconds: up to revision 1.1.1.4 external/public-domain/tz/dist/leapseconds.awk: up to revision 1.1.1.4 external/public-domain/tz/dist/northamerica: up to revision 1.1.1.7 external/public-domain/tz/dist/southamerica: up to revision 1.1.1.5 external/public-domain/tz/dist/zone.tab: up to revision 1.1.1.4 external/public-domain/tz/dist/zone1970.tab: up to revision 1.1.1.5 Update tzdata from 2014j to 2015b. Some of the changes are: * Mongolia will start observing DST in 2015. * Changes to Palestine DST dates in 2014 and 2015. * The Mexican state of Quintana Roo, represented by America/Cancun, changed time zone in Feb 2015. * Chile's new standard time from 2015 will be its old DST. * New leap second 2015-06-30 23:59:60 UTC as per IERS Bulletin C 49. * Corrections to historic times in Iceland and Easter Island. * Some more zones have been turned into links, when they differed from existing zones only for times before 1970. @ text @d127 1 a127 1 Rule US 1945 only - Sep lastSun 2:00 0 S d2127 1 a2127 1 # From Paul Eggert (2014-12-07): d2131 1 a2131 1 # http://www.diputados.gob.mx/bibliot/publica/inveyana/polisoc/horver/index.htm a2299 34 # From Steffen Thorsen (2014-12-08), translated by Gwillim Law: # The Mexican state of Quintana Roo will likely change to EST in 2015. # # http://www.unioncancun.mx/articulo/2014/12/04/medio-ambiente/congreso-aprueba-una-hora-mas-de-sol-en-qroo # "With this change, the time conflict that has existed between the municipios # of Quintana Roo and the municipio of Felipe Carrillo Puerto may come to an # end. The latter declared itself in rebellion 15 years ago when a time change # was initiated in Mexico, and since then it has refused to change its time # zone along with the rest of the country." # # From Steffen Thorsen (2015-01-14), translated by Gwillim Law: # http://sipse.com/novedades/confirman-aplicacion-de-nueva-zona-horaria-para-quintana-roo-132331.html # "...the new time zone will come into effect at two o'clock on the first Sunday # of February, when we will have to advance the clock one hour from its current # time..." # Also, the new zone will not use DST. # # From Carlos Raúl Perasso (2015-02-02): # The decree that modifies the Mexican Hour System Law has finally # been published at the Diario Oficial de la Federación # http://www.dof.gob.mx/nota_detalle.php?codigo=5380123&fecha=31/01/2015 # It establishes 5 zones for Mexico: # 1- Zona Centro (Central Zone): Corresponds to longitude 90 W, # includes most of Mexico, excluding what's mentioned below. # 2- Zona Pacífico (Pacific Zone): Longitude 105 W, includes the # states of Baja California Sur; Chihuahua; Nayarit (excluding Bahía # de Banderas which lies in Central Zone); Sinaloa and Sonora. # 3- Zona Noroeste (Northwest Zone): Longitude 120 W, includes the # state of Baja California. # 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state # of Quintana Roo. # 5- The islands, reefs and keys shall take their timezone from the # longitude they are located at. d2320 1 a2320 2 -6:00 Mexico C%sT 2015 Feb 1 2:00 -5:00 - EST d2492 2 d2495 4 a2498 1 # See America/Port_of_Spain. d2565 4 a2568 1 # See America/Panama. a3090 1 Link America/Panama America/Cayman @ 1.1.1.1.4.4 log @Pull up following revision(s) (requested by jun in ticket #955): doc/3RDPARTY: patch external/public-domain/tz/dist/Makefile: up to 1.1.1.9 external/public-domain/tz/dist/NEWS: up to 1.1.1.9 external/public-domain/tz/dist/Theory: up to 1.1.1.4 external/public-domain/tz/dist/africa: up to 1.1.1.6 external/public-domain/tz/dist/antarctica: up to 1.1.1.4 external/public-domain/tz/dist/asia: up to 1.1.1.8 external/public-domain/tz/dist/backward: up to 1.1.1.4 external/public-domain/tz/dist/backzone: up to 1.1.1.7 external/public-domain/tz/dist/checktab.awk: up to 1.1.1.7 external/public-domain/tz/dist/europe: up to 1.1.1.9 external/public-domain/tz/dist/iso3166.tab: up to 1.1.1.2 external/public-domain/tz/dist/leap-seconds.list: up to 1.1.1.4 external/public-domain/tz/dist/leapseconds: up to 1.1.1.5 external/public-domain/tz/dist/northamerica: up to 1.1.1.9 external/public-domain/tz/dist/southamerica: up to 1.1.1.7 external/public-domain/tz/dist/zone.tab: up to 1.1.1.5 external/public-domain/tz/dist/zone1970.tab: up to 1.1.1.7 external/public-domain/tz/tzdata2netbsd: up to 1.7 Update tzdata to 2015f. @ text @d230 3 a232 8 # Public law 106-564 (2000-12-23) introduced ... "Chamorro Standard Time" # for time in Guam and the Northern Marianas. See the file "australasia". # # From Paul Eggert (2015-04-17): # HST and HDT are standardized abbreviations for Hawaii-Aleutian # standard and daylight times. See section 9.47 (p 234) of the # U.S. Government Printing Office Style Manual (2008) # http://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf d539 1 a539 1 -10:00 US H%sT d1233 1 a1233 9 # From Brian Inglis (2015-07-20): # From the historical weather station records available at: # https://weatherspark.com/history/28351/1971/Sydney-Nova-Scotia-Canada # Sydney shares the same time history as Glace Bay, so was # likely to be the same across the island.... # Sydney, as the capital and most populous location, or Cape Breton, would # have been better names for the zone had we known this in 1996. # From Paul Eggert (2015-07-20): d1236 1 a1236 2 # the Cape Breton area, represented by Glace Bay, is the largest we know of # (Glace Bay was perhaps not the best name choice but no point changing now). d1334 8 a1341 3 # From Paul Eggert (2015-03-24): # See America/Toronto for most of Quebec, including Montreal. # d1355 22 d1381 7 d1828 1 a1828 1 # note 1: d1831 1 a1831 1 # note 2: d1834 1 a1834 1 # note 3: d1878 1 a1878 1 # c. 7 defines Yukon standard time as UTC-9.... a1879 1 # [http://canlii.ca/t/7vhg] d1883 6 a1888 103 # From Brian Inglis (2015-04-14): # # I tried to trace the history of Yukon time and found the following # regulations, giving the reference title and URL if found, regulation name, # and relevant quote if available. Each regulation specifically revokes its # predecessor. The final reference is to the current Interpretation Act # authorizing and resulting from these regulatory changes. # # Only recent regulations were retrievable via Yukon government site search or # index, and only some via Canadian legal sources. Other sources used include # articles titled "Standard Time and Time Zones in Canada" from JRASC via ADS # Abstracts, cited by ADO for 1932 ..., and updated versions from 1958 and # 1970 quoted below; each article includes current extracts from provincial # and territorial ST and DST regulations at the end, summaries and details of # standard times and daylight saving time at many locations across Canada, # with time zone maps, tables and calculations for Canadian Sunrise, Sunset, # and LMST; they also cover many countries and global locations, with a chart # and table showing current Universal Time offsets, and may be useful as # another source of information for 1970 and earlier. # # * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26, # pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS) # http://adsabs.harvard.edu/abs/1932JRASC..26...49S from p.75: # Yukon Interpretation Ordinance # Yukon standard time is the local mean time at the one hundred and # thirty-fifth meridian. # # * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.; # JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System # (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1: # Yukon Interpretation Ordinance, 1955, Chap. 16. # # (1) Subject to this section, standard time shall be reckoned as nine # hours behind Greenwich Time and called Yukon Standard Time. # # (2) Notwithstanding subsection (1), the Commissioner may make regulations # varying the manner of reckoning standard time. # # * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance # http://? - no online source found # # * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC, # Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS) # http://adsabs.harvard.edu/abs/1970JRASC..64..129T from p.156: Yukon # Territory Commissioner's Order 1967-59 Interpretation Ordinance ... # # 1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon # Territory on 27th January, 1966, is hereby revoked. # # 2. Yukon (East) Standard Time as defined by section 36 of the # Interpretation Ordinance from and after mid-night on the 28th day of May, # 1967 shall be reckoned in the same manner as Pacific Standard Time, that # is to say, eight hours behind Greenwich Time in the area of the Yukon # Territory lying east of the 138th degree longitude west. # # 3. In the remainder of the Territory, lying west of the 138th degree # longitude west, Yukon (West) Standard Time shall be reckoned as nine # hours behind Greenwich Time. # # * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214 # http://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html # C.O. 1973/214 INTERPRETATION ACT ... # # 1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby # revoked. # # 2. Yukon Standard Time as defined by section 36 of the Interpretation # Act from and after midnight on the twenty-eighth day of October, 1973 # shall be reckoned in the same manner as Pacific Standard Time, that is # to say eight hours behind Greenwich Time. # # * O.I.C. 1980/02 INTERPRETATION ACT # http://? - no online source found # # * Yukon Daylight Saving Time, YOIC 1987/56 # http://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html # O.I.C. 1987/056 INTERPRETATION ACT ... # # In every year between # (a) two o'clock in the morning in the first Sunday in April, and # (b) two o'clock in the morning in the last Sunday in October, # Standard Time shall be reckoned as seven hours behind Greenwich Time and # called Yukon Daylight Saving Time. # ... # Dated ... 9th day of March, A.D., 1987. # # * Yukon Daylight Saving Time 2006, YOIC 2006/127 # http://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html # O.I.C. 2006/127 INTERPRETATION ACT ... # # 1. In Yukon each year the time for general purposes shall be 7 hours # behind Greenwich mean time during the period commencing at two o'clock # in the forenoon on the second Sunday of March and ending at two o'clock # in the forenoon on the first Sunday of November and shall be called # Yukon Daylight Saving Time. # # 2. Order-in-Council 1987/56 is revoked. # # 3. This order comes into force January 1, 2007. # # * Interpretation Act, RSY 2002, c 125 # http://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html d2114 1 a2114 1 -9:00 NT_YK Y%sT 1967 May 28 0:00 d2595 1 a2595 11 # From Paul Eggert (2015-05-15): # The Cayman government has decided to introduce DST in 2016, the idea being # to keep in sync with New York. The legislation hasn't passed but the change # seems quite likely. See: Meade B. Cayman 27. # http://www.cayman27.com.ky/2015/05/15/clock-ticks-toward-daylight-saving-time-in-cayman Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown -5:07:11 - KMT 1912 Feb # Kingston Mean Time -5:00 - EST 2016 -5:00 US E%sT d3118 1 @ 1.1.1.1.4.4.2.1 log @Pull up following revision(s) (requested by christos in ticket #1143): external/public-domain/tz/dist/CONTRIBUTING: up to 1.1.1.2 external/public-domain/tz/dist/LICENSE: up to 1.1.1.1 external/public-domain/tz/dist/Makefile: up to 1.1.1.10 external/public-domain/tz/dist/NEWS: up to 1.1.1.10 external/public-domain/tz/dist/README: up to 1.1.1.3 external/public-domain/tz/dist/Theory: up to 1.1.1.5 external/public-domain/tz/dist/asia: up to 1.1.1.9 external/public-domain/tz/dist/australasia: up to 1.1.1.6 external/public-domain/tz/dist/backward: up to 1.1.1.5 external/public-domain/tz/dist/backzone: up to 1.1.1.8 external/public-domain/tz/dist/checklinks.awk: up to 1.1.1.2 external/public-domain/tz/dist/checktab.awk: up to 1.1.1.8 external/public-domain/tz/dist/europe: up to 1.1.1.10 external/public-domain/tz/dist/iso3166.tab: up to 1.1.1.3 external/public-domain/tz/dist/leap-seconds.list: up to 1.1.1.5 external/public-domain/tz/dist/leapseconds.awk: up to 1.1.1.5 external/public-domain/tz/dist/leapseconds: up to 1.1.1.6 external/public-domain/tz/dist/northamerica: up to 1.1.1.10 external/public-domain/tz/dist/zone.tab: up to 1.1.1.6 external/public-domain/tz/dist/zone1970.tab: up to 1.1.1.8 external/public-domain/tz/tzdata2netbsd: up to 1.8 Update tzdata to 2016b. @ text @a327 10 # From an email administrator of the City of Fort Pierre, SD (2015-12-21): # Fort Pierre is technically located in the Mountain time zone as is # the rest of Stanley County. Most of Stanley County and Fort Pierre # uses the Central time zone due to doing most of their business in # Pierre so it simplifies schedules. I have lived in Stanley County # all my life and it has been that way since I can remember. (43 years!) # # From Paul Eggert (2015-12-25): # Assume this practice predates 1970, so Fort Pierre can use America/Chicago. a483 6 # From Steffen Thorsen (2015-11-09): # It seems Metlakatla did go off PST on Sunday, November 1, changing # their time to AKST and are going to follow Alaska's DST, switching # between AKST and AKDT from now on.... # http://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/ d509 1 a509 2 -8:00 - PST 2015 Nov 1 2:00 -9:00 US AK%sT a1828 16 # From Matt Johnson (2015-09-21): # Fort Nelson, BC, Canada will cancel DST this year. So while previously they # were aligned with America/Vancouver, they're now aligned with # America/Dawson_Creek. # http://www.northernrockies.ca/EN/meta/news/archives/2015/northern-rockies-time-change.html # # From Tim Parenti (2015-09-23): # This requires a new zone for the Northern Rockies Regional Municipality, # America/Fort_Nelson. The resolution of 2014-12-08 was reached following a # 2014-11-15 poll with nearly 75% support. Effectively, the municipality has # been on MST (-0700) like Dawson Creek since it advanced its clocks on # 2015-03-08. # # From Paul Eggert (2015-09-23): # Shanks says Fort Nelson did not observe DST in 1946, unlike Vancouver. a1846 6 Zone America/Fort_Nelson -8:10:47 - LMT 1884 -8:00 Vanc P%sT 1946 -8:00 - PST 1947 -8:00 Vanc P%sT 1987 -8:00 Canada P%sT 2015 Mar 8 2:00 -7:00 - MST d2439 1 a2439 1 # Coahuila, Nuevo León, Tamaulipas (near US border) d2445 1 a2445 1 # Durango; Coahuila, Nuevo León, Tamaulipas (away from US border) d2548 1 a2548 1 # Baja California d2568 19 a2598 7 # From Paul Eggert (2015-10-08): # Formerly there was an America/Santa_Isabel zone, but this appears to # have come from a misreading of # http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 # It has been moved to the 'backward' file. # # d2673 11 a2683 1 # See America/Panama. a3045 7 # From Steffen Thorsen (2016-03-12): # Jean Antoine, editor of www.haiti-reference.com informed us that Haiti # are not going on DST this year. Several other resources confirm this: ... # http://www.radiotelevisioncaraibes.com/presse/heure_d_t_pas_de_changement_d_heure_pr_vu_pour_cet_ann_e.html # http://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/ # http://news.anmwe.com/haiti-lheure-nationale-ne-sera-ni-avancee-ni-reculee-cette-annee/ d3056 2 a3057 2 Rule Haiti 2012 2015 - Mar Sun>=8 2:00 1:00 D Rule Haiti 2012 2015 - Nov Sun>=1 2:00 0 S a3205 1 Link America/Panama America/Cayman @ 1.1.1.1.4.4.2.2 log @Pull up following revision(s) (requested by kre in ticket #1324): distrib/sets/lists/base/mi: 1.1125, 1.1128, 1.1132, 1.1137, 1.1139, 1.1140 external/public-domain/tz/dist/CONTRIBUTING: up to 1.1.1.3 external/public-domain/tz/dist/LICENSE: up to 1.1.1.2 external/public-domain/tz/dist/Makefile: up to 1.1.1.16 external/public-domain/tz/dist/NEWS: up to 1.1.1.16 external/public-domain/tz/dist/README: up to 1.1.1.5 external/public-domain/tz/dist/TZDATA_VERSION: up to 1.6 external/public-domain/tz/dist/Theory: up to 1.1.1.9 external/public-domain/tz/dist/africa: up to 1.1.1.9 external/public-domain/tz/dist/antarctica: up to 1.1.1.7 external/public-domain/tz/dist/asia: up to 1.1.1.15 external/public-domain/tz/dist/australasia: up to 1.1.1.10 external/public-domain/tz/dist/backward: up to 1.1.1.6 external/public-domain/tz/dist/backzone: up to 1.1.1.10 external/public-domain/tz/dist/etcetera: up to 1.1.1.2 external/public-domain/tz/dist/europe: up to 1.1.1.16 external/public-domain/tz/dist/factory: up to 1.1.1.2 external/public-domain/tz/dist/iso3166.tab: up to 1.1.1.4 external/public-domain/tz/dist/leap-seconds.list: up to 1.1.1.6 external/public-domain/tz/dist/leapseconds: up to 1.1.1.7 external/public-domain/tz/dist/northamerica: up to 1.1.1.14 external/public-domain/tz/dist/southamerica: up to 1.1.1.10 external/public-domain/tz/dist/version: up to 1.1.1.3 external/public-domain/tz/dist/zone.tab: up to 1.1.1.10 external/public-domain/tz/dist/zone1970.tab: up to 1.1.1.12 external/public-domain/tz/share/zoneinfo/Makefile: up to 1.3 external/public-domain/tz/tzdata2netbsd: up to 1.11 Update tzdata to 2016j. @ text @d27 2 a28 26 # From Paul Eggert (2016-09-21): # Dowd's proposal left many details unresolved, such as where to draw # lines between time zones. The key individual who made time zones # work in the US was William Frederick Allen - railway engineer, # managing editor of the Travelers' Guide, and secretary of the # General Time Convention, a railway standardization group. Allen # spent months in dialogs with scientific and railway leaders, # developed a workable plan to institute time zones, and presented it # to the General Time Convention on 1883-04-11, saying that his plan # meant "local time would be practically abolished" - a plus for # railway scheduling. By the next convention on 1883-10-11 nearly all # railroads had agreed and it took effect on 1883-11-18 at 12:00. # That Sunday was called the "day of two noons", as the eastern parts # of the new zones observed noon twice. Allen witnessed the # transition in New York City, writing: # # I heard the bells of St. Paul's strike on the old time. Four # minutes later, obedient to the electrical signal from the Naval # Observatory ... the time-ball made its rapid descent, the chimes # of old Trinity rang twelve measured strokes, and local time was # abandoned, probably forever. # # Most of the US soon followed suit. See: # Bartky IR. The adoption of standard time. Technol Cult 1989 Jan;30(1):25-56. # http://dx.doi.org/10.2307/3105430 a415 31 # From Paul Eggert (2016-08-20): # In early February 1948, in response to California's electricity shortage, # PG&E changed power frequency from 60 to 59.5 Hz during daylight hours, # causing electric clocks to lose six minutes per day. (This did not change # legal time, and is not part of the data here.) See: # Ross SA. An energy crisis from the past: Northern California in 1948. # Working Paper No. 8, Institute of Governmental Studies, UC Berkeley, # 1973-11. http://escholarship.org/uc/item/8x22k30c # # In another measure to save electricity, DST was instituted from 1948-03-14 # at 02:01 to 1949-01-16 at 02:00, with the governor having the option to move # the fallback transition earlier. See pages 3-4 of: # http://clerk.assembly.ca.gov/sites/clerk.assembly.ca.gov/files/archive/Statutes/1948/48Vol1_Chapters.pdf # # In response: # # Governor Warren received a torrent of objecting mail, and it is not too much # to speculate that the objections to Daylight Saving Time were one important # factor in the defeat of the Dewey-Warren Presidential ticket in California. # -- Ross, p 25 # # On December 8 the governor exercised the option, setting the date to January 1 # (LA Times 1948-12-09). The transition time was 02:00 (LA Times 1949-01-01). # # Despite the controversy, in 1949 California voters approved Proposition 12, # which established DST from April's last Sunday at 01:00 until September's # last Sunday at 02:00. This was amended by 1962's Proposition 6, which changed # the fall-back date to October's last Sunday. See: # http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props # http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props d418 1 a418 1 Rule CA 1948 only - Mar 14 2:01 1:00 D d420 1 a420 1 Rule CA 1950 1966 - Apr lastSun 1:00 1:00 D d2194 1 a2194 1 Zone America/Pangnirtung 0 - -00 1921 # trading post est. d2200 1 a2200 1 Zone America/Iqaluit 0 - -00 1942 Aug # Frobisher Bay est. d2205 1 a2205 1 Zone America/Resolute 0 - -00 1947 Aug 31 # Resolute founded d2212 1 a2212 1 Zone America/Rankin_Inlet 0 - -00 1957 # Rankin Inlet founded d2217 1 a2217 1 Zone America/Cambridge_Bay 0 - -00 1920 # trading post est.? d2223 1 a2223 1 Zone America/Yellowknife 0 - -00 1935 # Yellowknife founded? d2226 1 a2226 1 Zone America/Inuvik 0 - -00 1953 # Inuvik founded a2478 9 # This includes the following municipalities: # in Coahuila: Ocampo, Acuña, Zaragoza, Jiménez, Piedras Negras, Nava, # Guerrero, Hidalgo. # in Nuevo León: Anáhuac, Los Aldama. # in Tamaulipas: Nuevo Laredo, Guerrero, Mier, Miguel Alemán, Camargo, # Gustavo Díaz Ordaz, Reynosa, Río Bravo, Valle Hermoso, Matamoros. # See: Inicia mañana Horario de Verano en zona fronteriza, El Universal, # 2016-03-12 # http://www.eluniversal.com.mx/articulo/estados/2016/03/12/inicia-manana-horario-de-verano-en-zona-fronteriza a2499 3 # This includes the municipalities of Janos, Ascensión, Juárez, Guadalupe, # Práxedis G Guerrero, Coyame del Sotol, Ojinaga, and Manuel Benavides. # (See the 2016-03-12 El Universal source mentioned above.) d3272 1 a3272 1 # The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round. See: @ 1.1.1.1.4.4.2.3 log @Pull up following revision(s) (requested by kre in ticket #1374): doc/3RDPARTY: 1.1420 via patch distrib/sets/lists/base/mi: 1.1155 external/public-domain/tz/dist/Makefile: up to 1.1.1.17 external/public-domain/tz/dist/NEWS: up to 1.1.1.17 external/public-domain/tz/dist/TZDATA_VERSION: up to 1.7 external/public-domain/tz/dist/Theory: up to 1.1.1.10 external/public-domain/tz/dist/africa: up to 1.1.1.10 external/public-domain/tz/dist/antarctica: up to 1.1.1.8 external/public-domain/tz/dist/asia: up to 1.1.1.16 external/public-domain/tz/dist/australasia: up to 1.1.1.11 external/public-domain/tz/dist/backward: up to 1.1.1.7 external/public-domain/tz/dist/backzone: up to 1.1.1.11 external/public-domain/tz/dist/europe: up to 1.1.1.17 external/public-domain/tz/dist/leap-seconds.list: up to 1.1.1.7 external/public-domain/tz/dist/leapseconds: up to 1.1.1.8 external/public-domain/tz/dist/northamerica: up to 1.1.1.15 external/public-domain/tz/dist/southamerica: up to 1.1.1.11 external/public-domain/tz/dist/version: up to 1.1.1.4 external/public-domain/tz/dist/zone.tab: up to 1.1.1.11 external/public-domain/tz/dist/zone1970.tab: up to 1.1.1.13 Update to tzdata2017a. @ text @d181 16 a252 15 # From Paul Eggert (2016-12-19): # Here are URLs for the 1918 and 1966 legislation: # http://uscode.house.gov/statviewer.htm?volume=40&page=451 # http://uscode.house.gov/statviewer.htm?volume=80&page=108 # Although the 1918 names were officially "United States Standard # Eastern Time" and similarly for "Central", "Mountain", "Pacific", # and "Alaska", in practice "Standard" was placed just before "Time", # as codified in 1966. In practice, Alaska time was abbreviated "AST" # before 1968. Summarizing the 1967 name changes: # 1918 names 1967 names # -08 Standard Pacific Time (PST) Pacific standard time (PST) # -09 (unofficial) Yukon (YST) Yukon standard time (YST) # -10 Standard Alaska Time (AST) Alaska-Hawaii standard time (AHST) # -11 (unofficial) Nome (NST) Bering standard time (BST) # a307 9 # # From Paul Eggert (2017-02-22): # Four cities are involved. The two not mentioned above are Smiths Station # and Valley. Barbara Brooks, Valley's assistant treasurer, heard it started # because West Point Pepperell textile mills were in Alabama while the # corporate office was in Georgia, and residents voted to keep Eastern # time even after the mills closed. See: Kazek K. Did you know which # Alabama towns are in a different time zone? al.com 2017-02-06. # http://www.al.com/living/index.ssf/2017/02/do_you_know_which_alabama_town.html d485 1 a485 1 # AK%sT is the modern abbreviation for -09 per USNO. d591 4 a594 2 -10:00 - AST 1942 -10:00 US A%sT 1967 Apr d683 1 d1071 1 a1071 1 # From Paul Eggert (2017-02-10): d1078 2 a1079 2 # Many years ago Gwillim Law wrote that a good source # for time zone data was the International Air Transport d2737 6 a2742 6 Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 -0530 Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 CST Rule Belize 1973 only - Dec 5 0:00 1:00 CDT Rule Belize 1974 only - Feb 9 0:00 0 CST Rule Belize 1982 only - Dec 18 0:00 1:00 CDT Rule Belize 1983 only - Feb 12 0:00 0 CST d2745 1 a2745 1 -6:00 Belize %s d3017 6 a3022 6 Rule DR 1966 only - Oct 30 0:00 1:00 EDT Rule DR 1967 only - Feb 28 0:00 0 EST Rule DR 1969 1973 - Oct lastSun 0:00 0:30 -0430 Rule DR 1970 only - Feb 21 0:00 0 EST Rule DR 1971 only - Jan 20 0:00 0 EST Rule DR 1972 1974 - Jan 21 0:00 0 EST d3026 1 a3026 1 -5:00 DR %s 1974 Oct 27 d3316 2 a3317 2 -3:00 - -03 1987 -3:00 Canada -03/-02 @ 1.1.1.1.4.4.2.4 log @Pull up following revision(s) (requested by kre in ticket #1450): doc/3RDPARTY: revision 1.1425 via patch external/public-domain/tz/dist/NEWS: up to 1.1.1.18 external/public-domain/tz/dist/TZDATA_VERSION: up to 1.8 external/public-domain/tz/dist/africa: up to 1.1.1.11 external/public-domain/tz/dist/iso3166.tab: up to 1.1.1.5 external/public-domain/tz/dist/northamerica: up to 1.1.1.16 external/public-domain/tz/dist/version: up to 1.1.1.5 Update tzdata to 2017b. @ text @a3141 6 # From Steffen Thorsen (2017-03-12): # We have received 4 mails from different people telling that Haiti # has started DST again today, and this source seems to confirm that, # I have not been able to find a more authoritative source: # https://www.haitilibre.com/en/news-20319-haiti-notices-time-change-in-haiti.html a3153 2 Rule Haiti 2017 max - Mar Sun>=8 2:00 1:00 D Rule Haiti 2017 max - Nov Sun>=1 2:00 0 S @ 1.1.1.1.4.4.2.5 log @Pull up following revision(s) (requested by kre in ticket #1519): distrib/sets/lists/base/mi: 1.1164 doc/3RDPARTY: 1.2326 via patch external/public-domain/tz/dist/CONTRIBUTING: up to 1.1.1.4 external/public-domain/tz/dist/LICENSE: up to 1.1.1.3 external/public-domain/tz/dist/Makefile: up to 1.1.1.18 external/public-domain/tz/dist/NEWS: up to 1.1.1.19 external/public-domain/tz/dist/TZDATA_VERSION: up to 1.9 external/public-domain/tz/dist/Theory: delete external/public-domain/tz/dist/africa: up to 1.1.1.12 external/public-domain/tz/dist/antarctica: up to 1.1.1.9 external/public-domain/tz/dist/asia: up to 1.1.1.17 external/public-domain/tz/dist/australasia: up to 1.1.1.12 external/public-domain/tz/dist/backward: up to 1.1.1.8 external/public-domain/tz/dist/backzone: up to 1.1.1.12 external/public-domain/tz/dist/calendars: up to 1.1.1.1 external/public-domain/tz/dist/checklinks.awk: up to 1.1.1.3 external/public-domain/tz/dist/europe: up to 1.1.1.18 external/public-domain/tz/dist/leap-seconds.list: up to 1.1.1.8 external/public-domain/tz/dist/leapseconds: up to 1.1.1.9 external/public-domain/tz/dist/leapseconds.awk: up to 1.1.1.6 external/public-domain/tz/dist/northamerica: up to 1.1.1.17 external/public-domain/tz/dist/southamerica: up to 1.1.1.12 external/public-domain/tz/dist/theory.html: up to 1.1.1.1 external/public-domain/tz/dist/version: up to 1.1.1.6 external/public-domain/tz/dist/zishrink.awk: up to 1.1.1.1 external/public-domain/tz/dist/zone.tab: up to 1.1.1.12 external/public-domain/tz/dist/zone1970.tab: up to 1.1.1.14 Update tzdata to 2017c. @ text @d108 1 a108 1 # https://web.archive.org/web/20000926032210/http://rowayton.org/rhs/hstaug45.html a111 3 # # From Paul Eggert (2017-09-23): # This was the V-J Day issue of the Clamdigger, a Rowayton, CT newsletter. d260 1 a260 1 # https://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf d349 1 a349 1 # https://docs.legis.wisconsin.gov/statutes/statutes/175.pdf d358 1 a358 1 # https://docs.legis.wisconsin.gov/2007/related/acts/3 d405 1 a405 1 # https://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm d456 1 a456 1 # 1973-11. https://escholarship.org/uc/item/8x22k30c d477 2 a478 2 # https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props # https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props d495 1 a495 1 # From Paul Eggert (2017-06-15): d498 4 a501 10 # On Friday, 1867-10-18 (Gregorian), at precisely 15:30 local time, the # Russian forts and fleet at Sitka fired salutes to mark the ceremony of # formal transfer. See the Sacramento Daily Union (1867-11-14), p 3, col 2. # https://cdnc.ucr.edu/cgi-bin/cdnc?a=d&d=SDU18671114.2.12.1 # Sitka workers did not change their calendars until Sunday, 1867-10-20, # and so celebrated two Sundays that week. See: Ahllund T (tr Hallamaa P). # From the memoirs of a Finnish workman. Alaska History. 2006 Fall;21(2):1-25. # http://alaskahistoricalsociety.org/wp-content/uploads/2016/12/Ahllund-2006-Memoirs-of-a-Finnish-Workman.pdf # Include only the time zone part of this transition, ignoring the switch # from Julian to Gregorian, since we can't represent the Julian calendar. d503 1 a503 1 # As far as we know, of the locations mentioned below only Sitka was d505 4 a508 9 # (Yakutat was colonized by the Russians in 1799, but the settlement was # destroyed in 1805 by a Yakutat-kon war party.) Many of Alaska's inhabitants # were unaware of the US acquisition of Alaska, much less of any calendar or # time change. However, the Russian-influenced part of Alaska did observe # Russian time, and it is more accurate to model this than to ignore it. # The database format requires an exact transition time; use the Russian # salute as a somewhat-arbitrary time for the formal transfer of control for # all of Alaska. Sitka's UTC offset is -9:01:13; adjust its 15:30 to the # local times of other Alaskan locations so that they change simultaneously. d561 1 a561 1 # https://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/ d564 1 a564 1 Zone America/Juneau 15:02:19 - LMT 1867 Oct 19 15:33:32 d574 1 a574 1 Zone America/Sitka 14:58:47 - LMT 1867 Oct 19 15:30 d582 1 a582 1 Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 19 15:44:55 d590 1 a590 1 Zone America/Yakutat 14:41:05 - LMT 1867 Oct 19 15:12:18 d597 1 a597 1 Zone America/Anchorage 14:00:24 - LMT 1867 Oct 19 14:31:37 d605 1 a605 1 Zone America/Nome 12:58:22 - LMT 1867 Oct 19 13:29:35 d614 1 a614 1 Zone America/Adak 12:13:22 - LMT 1867 Oct 19 12:44:35 d650 1 a650 1 # https://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf d749 1 a749 1 # https://en.wikipedia.org/wiki/Time_in_Indiana d976 1 a976 1 # https://www.gpo.gov/fdsys/pkg/FR-2000-08-17/html/00-20854.htm d1002 1 a1002 1 # https://www.gpo.gov/fdsys/pkg/FR-1999-10-21/html/99-27240.htm a1031 13 # From Paul Eggert (2017-07-26): # Although Shanks says Detroit observed DST in 1967 from 06-14 00:01 # until 10-29 00:01, I now see multiple reports that this is incorrect. # For example, according to a 50-year anniversary report about the 1967 # Detroit riots and a major-league doubleheader on 1967-07-23, "By the time # the last fly ball of the doubleheader settled into the glove of leftfielder # Lenny Green, it was after 7 p.m. Detroit did not observe daylight saving # time, so light was already starting to fail. Twilight was made even deeper # by billowing columns of smoke that ascended in an unbroken wall north of the # ballpark." See: Dow B. Detroit '67: As violence unfolded, Tigers played two # at home vs. Yankees. Detroit Free Press 2017-07-23. # https://www.freep.com/story/sports/mlb/tigers/2017/07/23/detroit-tigers-1967-riot-new-york-yankees/499951001/ # d1036 2 d1101 1 a1101 1 # . d1147 1 a1147 1 # https://archive.news.gov.bc.ca/releases/news_releases_2005-2009/2006AG0014-000330.htm d1151 1 a1151 1 # https://www.novascotia.ca/just/regulations/rg2/2006/ma1206.pdf d1155 1 a1155 1 # https://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf d1159 1 a1159 1 # https://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php d1173 1 a1173 1 # https://www.gov.yk.ca/legislation/regs/oic2006_127.pdf d1194 2 a1195 2 # https://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html # https://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5 d1232 5 a1236 7 # From Paul Eggert (2017-10-14): # Legally Labrador should observe Newfoundland time; see: # McLeod J. Labrador time - legal or not? St. John's Telegram, 2017-10-07 # http://www.thetelegram.com/news/local/labrador-time--legal-or-not-154860/ # Matthews and Vincent (1998) write that the only part of Labrador # that follows the rules is the southeast corner, including Port Hope # Simpson and Mary's Harbour, but excluding, say, Black Tickle. d1436 1 a1436 1 # https://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en a1467 5 # # From Paul Eggert (2017-07-08): # For more on Orillia, see: Daubs K. Bold attempt at daylight saving # time became a comic failure in Orillia. Toronto Star 2017-07-08. # https://www.thestar.com/news/insight/2017/07/08/bold-attempt-at-daylight-saving-time-became-a-comic-failure-in-orillia.html d1959 1 a1959 1 # [https://www.canlii.org/en/ca/laws/stat/rsc-1985-c-i-21/latest/rsc-1985-c-i-21.html] d2024 1 a2024 1 # https://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html d2039 1 a2039 1 # https://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html d2051 1 a2051 1 # https://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html d2065 1 a2065 1 # https://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html d2108 1 a2108 1 # http://www.nunatsiaqonline.ca/archives/nunavut991130/nvt91119_17.html d2126 1 a2126 1 # From d2457 1 a2457 1 # https://www.timeanddate.com/news/time/north-mexico-dst-change.html d2876 1 a2876 1 # https://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html d2923 1 a2923 1 # https://www.timeanddate.com/news/time/cuba-starts-dst-2011.html d2933 1 a2933 1 # https://www.timeanddate.com/news/time/cuba-time-changes-2011.html d2943 1 a2943 1 # https://www.timeanddate.com/news/time/cuba-starts-dst-2012.html d3138 2 a3139 2 # https://www.radiotelevisioncaraibes.com/presse/heure_d_t_pas_de_changement_d_heure_pr_vu_pour_cet_ann_e.html # https://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/ d3338 1 a3338 1 # https://bugs.debian.org/415007 a3359 12 # From the Turks & Caicos Cabinet (2017-07-20), heads-up from Steffen Thorsen: # ... agreed to the reintroduction in TCI of Daylight Saving Time (DST) # during the summer months and Standard Time, also known as Local # Time, during the winter months with effect from April 2018 ... # https://www.gov.uk/government/news/turks-and-caicos-post-cabinet-meeting-statement--3 # # From Paul Eggert (2017-08-26): # The date of effect of the spring 2018 change appears to be March 11, # which makes more sense. See: Hamilton D. Time change back # by March 2018 for TCI. Magnetic Media. 2017-08-25. # http://magneticmediatv.com/2017/08/time-change-back-by-march-2018-for-tci/ # d3365 1 a3365 2 -4:00 - AST 2018 Mar 11 3:00 -5:00 US E%sT @ 1.1.1.1.4.4.2.6 log @Pull up the following revisions, requested by kre in tickt #1589: external/public-domain/tz/dist/ziguard.awk up to 1.1.1.1 external/public-domain/tz/dist/CONTRIBUTING up to 1.1.1.5 external/public-domain/tz/dist/Makefile up to 1.1.1.20 external/public-domain/tz/dist/NEWS up to 1.1.1.21 external/public-domain/tz/dist/README up to 1.1.1.6 external/public-domain/tz/dist/TZDATA_VERSION up to 1.11 external/public-domain/tz/dist/africa up to 1.1.1.14 external/public-domain/tz/dist/antarctica up to 1.1.1.10 external/public-domain/tz/dist/asia up to 1.1.1.19 external/public-domain/tz/dist/australasia up to 1.1.1.14 external/public-domain/tz/dist/backzone up to 1.1.1.14 external/public-domain/tz/dist/checktab.awk up to 1.1.1.9 external/public-domain/tz/dist/europe up to 1.1.1.20 external/public-domain/tz/dist/leap-seconds.list up to 1.1.1.9 external/public-domain/tz/dist/leapseconds up to 1.1.1.10 external/public-domain/tz/dist/northamerica up to 1.1.1.19 external/public-domain/tz/dist/southamerica up to 1.1.1.14 external/public-domain/tz/dist/theory.html up to 1.1.1.3 external/public-domain/tz/dist/version up to 1.1.1.8 external/public-domain/tz/dist/zishrink.awk up to 1.1.1.3 external/public-domain/tz/dist/zone.tab up to 1.1.1.14 external/public-domain/tz/dist/zone1970.tab up to 1.1.1.16 Update of /cvsroot/src/external/public-domain/tz/dist In directory ivanova.netbsd.org:/tmp/cvs-serv18468 Log Message: Import tzdata2018d from ftp://ftp.iana.org/tz/releases/tzdata2018d.tar.gz Summary of changes in tzdata2018d (2018-03-22 07:05:46 -0700): In 2018, Palestine starts DST on March 24 (today!), not March 31 Casey Station in Antarctica changed from +11 to +08 on 2018-03-11 at 04:00. Various adjustments to some historical conversions (several for Uruguay (1920 .. 1990), one fpr Enderbury and Kiritimati (1994/5), one for Portugal and colonies (1912) and Jamaica and Turks & Caicos (pre 1913)). @ text @d28 1 a28 1 # From Paul Eggert (2018-03-20): d39 4 a42 3 # railroads had agreed and it took effect on 1883-11-18. That Sunday # was called the "day of two noons", as some locations observed noon # twice. Allen witnessed the transition in New York City, writing: a350 12 # From Paul Eggert (2018-01-07): # In 1869 the Chicago Astronomical Society contracted with the city to keep # time. Though delayed by the Great Fire, by 1880 a wire ran from the # Dearborn Observatory (on the University of Chicago campus) to City Hall, # which then sent signals to police and fire stations. However, railroads got # their time signals from the Allegheny Observatory, the Madison Observatory, # the Ann Arbor Observatory, etc., so their clocks did not agree with each # other or with the city's official time. The confusion took some years to # clear up. See: # Moser M. How Chicago gave America its time zones. Chicago. 2018-01-04. # http://www.chicagomag.com/city-life/January-2018/How-Chicago-Gave-America-Its-Time-Zones/ d415 2 a416 1 # at 47° 15' 51" N, 101° 46' 40" W, which yields an offset of 6h47'07". d449 1 a449 1 # Nevada (except West Wendover), Oregon (except the northern ¾ of a946 7 # From Paul Eggert (2018-03-20): # The Louisville & Nashville Railroad's 1883-11-18 change occurred at # 10:00 old local time; train were supposed to come to a standstill # for precisely 18 minutes. See Bartky Fig. 1 (page 50). It is not # clear how this matched civil time in Louisville, so for now continue # to assume Louisville switched at noon new local time, like New York. # d1899 1 a1899 1 # i.e. Creston has been stuck on UT-7 for 93 years. d3255 2 a3256 2 Zone America/Jamaica -5:07:10 - LMT 1890 # Kingston -5:07:10 - KMT 1912 Feb # Kingston Mean Time d3406 1 a3406 1 -5:07:10 - KMT 1912 Feb # Kingston Mean Time @ 1.1.1.1.4.4.2.7 log @Sync external/public-domain/tz/dist to current, requested by kre in ticket #1644: external/public-domain/tz/dist/CONTRIBUTING up to 1.1.1.6 external/public-domain/tz/dist/Makefile up to 1.1.1.22 external/public-domain/tz/dist/NEWS up to 1.1.1.24 external/public-domain/tz/dist/README up to 1.1.1.7 external/public-domain/tz/dist/TZDATA_VERSION up to 1.14 external/public-domain/tz/dist/africa up to 1.1.1.17 external/public-domain/tz/dist/antarctica up to 1.1.1.11 external/public-domain/tz/dist/asia up to 1.1.1.21 external/public-domain/tz/dist/australasia up to 1.1.1.16 external/public-domain/tz/dist/backward up to 1.1.1.9 external/public-domain/tz/dist/backzone up to 1.1.1.15 external/public-domain/tz/dist/etcetera up to 1.1.1.3 external/public-domain/tz/dist/europe up to 1.1.1.23 external/public-domain/tz/dist/factory up to 1.1.1.3 external/public-domain/tz/dist/leap-seconds.list up to 1.1.1.10 external/public-domain/tz/dist/leapseconds up to 1.1.1.11 external/public-domain/tz/dist/leapseconds.awk up to 1.1.1.7 external/public-domain/tz/dist/northamerica up to 1.1.1.21 external/public-domain/tz/dist/pacificnew up to 1.1.1.2 external/public-domain/tz/dist/southamerica up to 1.1.1.15 external/public-domain/tz/dist/systemv up to 1.1.1.2 external/public-domain/tz/dist/theory.html up to 1.1.1.6 external/public-domain/tz/dist/version up to 1.1.1.11 external/public-domain/tz/dist/yearistype.sh up to 1.1.1.2 external/public-domain/tz/dist/ziguard.awk up to 1.1.1.3 external/public-domain/tz/dist/zishrink.awk up to 1.1.1.5 external/public-domain/tz/dist/zone.tab up to 1.1.1.15 external/public-domain/tz/dist/zone1970.tab up to 1.1.1.17 external/public-domain/tz/dist/zoneinfo2tdf.pl up to 1.1.1.2 doc/3RDPARTY (apply patch) Import tzdata2018f from ftp://ftp.iana.org/tz/releases/tzdata2018f.tar.gz Volgograd moves from +03 to +04 on 2018-10-28. Fiji ends DST 2019-01-13, not 2019-01-20. Most of Chile changes DST dates, effective 2019-04-06. Plus corrections to North Korea's 2018-05-05 and China's April 1988 updates (getting the actual time/date of the transition correct) Corrections for Macau pre 1992, Japan in late 1940's - early 1950's, and China (Shanghai) 1940's. The Phillipines get their timezone name abbreviations back. - Import tzdata2018g from ftp://ftp.iana.org/tz/releases/tzdata2018g.tar.gz Summary of changes in tzdata2018g (2018-10-26 22:22:45 -0700): Morocco switches to permanent +01 on 2018-10-27. @ text @a0 2 # tzdb data for North and Central America and environs d51 1 a51 1 # https://dx.doi.org/10.2307/3105430 a439 13 # From Paul Eggert (2018-10-25): # On 1921-03-04 federal law placed all of Texas into the central time zone. # However, El Paso ignored the law for decades and continued to observe # mountain time, on the grounds that that's what they had always done # and they weren't about to let the federal government tell them what to do. # Eventually the federal government gave in and changed the law on # 1970-04-10 to match what El Paso was actually doing. Although # that's slightly after our 1970 cutoff, there is no need to create a # separate zone for El Paso since they were ignoring the law anyway. See: # Long T. El Pasoans were time rebels, fought to stay in Mountain zone. # El Paso Times. 2018-10-24 06:40 -06. # https://www.elpasotimes.com/story/news/local/el-paso/2018/10/24/el-pasoans-were-time-rebels-fought-stay-mountain-zone/1744509002/ # d709 3 a711 1 -10:30 US H%sT 1947 Jun 8 2:00 @ 1.1.1.1.4.4.2.8 log @Pull up the following, requested by kre in ticket #1670: external/public-domain/tz/dist/Makefile up to 1.1.1.23 external/public-domain/tz/dist/NEWS up to 1.1.1.26 external/public-domain/tz/dist/TZDATA_VERSION up to 1.16 external/public-domain/tz/dist/africa up to 1.1.1.19 external/public-domain/tz/dist/asia up to 1.1.1.22 external/public-domain/tz/dist/australasia up to 1.1.1.17 external/public-domain/tz/dist/leapseconds up to 1.1.1.12 external/public-domain/tz/dist/leapseconds.awk up to 1.1.1.8 external/public-domain/tz/dist/northamerica up to 1.1.1.22 external/public-domain/tz/dist/theory.html up to 1.1.1.7 external/public-domain/tz/dist/version up to 1.1.1.13 external/public-domain/tz/dist/ziguard.awk up to 1.1.1.4 external/public-domain/tz/dist/zone.tab up to 1.1.1.16 external/public-domain/tz/dist/zone1970.tab up to 1.1.1.18 distrib/sets/lists/base/mi (patch) doc/3RDPARTY (patch) Import tzdata2018h from ftp://ftp.iana.org/tz/releases/tzdata2018h.tar.gz Summary of changes in tzdata2018h (2018-12-23 17:59:32 -0800): Qyzylorda (aka Kyzylorda) oblast in Kazakhstan moved from +06 to +05 on 2018-12-21. This is a zone split as Qostanay (aka Kostanay) did not switch, so create a zone Asia/Qostanay. Metlakatla, Alaska observes PST this winter only. Add predictions for Iran from 2038 through 2090. Changes to some old timestamps for Nauru (1979) Guam (1959-77), Hong Kong (1904, 1941, 1945, 1952) (others in Pacific during WWII) --- Merge tzdata2018h --- Update to tzdata2018h (new zone Asia/Qostanay) --- Import tzdata2018i from ftp://ftp.iana.org/tz/releases/tzdata2018i.tar.gz Summary of changes in tzdata2018i (2018-12-30 11:05:43 -0800): Due to a change in government, Sao Tome and Principe switches back from +01 to +00 on 2019-01-01 at 02:00. --- Merge tzdata2018i --- Update to tzdata2018i @ text @a601 11 # From Ryan Stanley (2018-11-06): # The Metlakatla community in Alaska has decided not to change its # clock back an hour starting on November 4th, 2018 (day before yesterday). # They will be gmtoff=-28800 year-round. # https://www.facebook.com/141055983004923/photos/pb.141055983004923.-2207520000.1541465673./569081370202380/ # From Paul Eggert (2018-12-16): # In a 2018-12-11 special election, Metlakatla voted to go back to # Alaska time (including daylight saving time) starting next year. # https://www.krbd.org/2018/12/12/metlakatla-to-follow-alaska-standard-time-allow-liquor-sales/ a627 2 -9:00 US AK%sT 2018 Nov 4 2:00 -8:00 - PST 2019 Mar Sun>=8 3:00 a787 16 # From Paul Eggert (2018-11-30): # A brief but entertaining history of time in Indiana describes a 1949 debate # in the Indiana House where city legislators (who favored "fast time") # tussled with farm legislators (who didn't) over a bill to outlaw DST: # "Lacking enough votes, the city faction tries to filibuster until time runs # out on the session at midnight, but rural champion Rep. Herbert Copeland, # R-Madison, leans over the gallery railing and forces the official clock # back to 9 p.m., breaking it in the process. The clock sticks on 9 as the # debate rages on into the night. The filibuster finally dies out and the # bill passes, while outside the chamber, clocks read 3:30 a.m. In the end, # it doesn't matter which side won. The law has no enforcement powers and # is simply ignored by fast-time communities." # How Indiana went from 'God's time' to split zones and daylight-saving. # Indianapolis Star. 2018-11-27 14:58 -05. # https://www.indystar.com/story/news/politics/2018/11/27/indianapolis-indiana-time-zone-history-central-eastern-daylight-savings-time/2126300002/ # @ 1.1.1.1.4.5 log @Pull up following revision(s) (requested by christos in ticket #1143): external/public-domain/tz/dist/CONTRIBUTING: up to 1.1.1.2 external/public-domain/tz/dist/LICENSE: up to 1.1.1.1 external/public-domain/tz/dist/Makefile: up to 1.1.1.10 external/public-domain/tz/dist/NEWS: up to 1.1.1.10 external/public-domain/tz/dist/README: up to 1.1.1.3 external/public-domain/tz/dist/Theory: up to 1.1.1.5 external/public-domain/tz/dist/asia: up to 1.1.1.9 external/public-domain/tz/dist/australasia: up to 1.1.1.6 external/public-domain/tz/dist/backward: up to 1.1.1.5 external/public-domain/tz/dist/backzone: up to 1.1.1.8 external/public-domain/tz/dist/checklinks.awk: up to 1.1.1.2 external/public-domain/tz/dist/checktab.awk: up to 1.1.1.8 external/public-domain/tz/dist/europe: up to 1.1.1.10 external/public-domain/tz/dist/iso3166.tab: up to 1.1.1.3 external/public-domain/tz/dist/leap-seconds.list: up to 1.1.1.5 external/public-domain/tz/dist/leapseconds.awk: up to 1.1.1.5 external/public-domain/tz/dist/leapseconds: up to 1.1.1.6 external/public-domain/tz/dist/northamerica: up to 1.1.1.10 external/public-domain/tz/dist/zone.tab: up to 1.1.1.6 external/public-domain/tz/dist/zone1970.tab: up to 1.1.1.8 external/public-domain/tz/tzdata2netbsd: up to 1.8 Update tzdata to 2016b. @ text @a327 10 # From an email administrator of the City of Fort Pierre, SD (2015-12-21): # Fort Pierre is technically located in the Mountain time zone as is # the rest of Stanley County. Most of Stanley County and Fort Pierre # uses the Central time zone due to doing most of their business in # Pierre so it simplifies schedules. I have lived in Stanley County # all my life and it has been that way since I can remember. (43 years!) # # From Paul Eggert (2015-12-25): # Assume this practice predates 1970, so Fort Pierre can use America/Chicago. a483 6 # From Steffen Thorsen (2015-11-09): # It seems Metlakatla did go off PST on Sunday, November 1, changing # their time to AKST and are going to follow Alaska's DST, switching # between AKST and AKDT from now on.... # http://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/ d509 1 a509 2 -8:00 - PST 2015 Nov 1 2:00 -9:00 US AK%sT a1828 16 # From Matt Johnson (2015-09-21): # Fort Nelson, BC, Canada will cancel DST this year. So while previously they # were aligned with America/Vancouver, they're now aligned with # America/Dawson_Creek. # http://www.northernrockies.ca/EN/meta/news/archives/2015/northern-rockies-time-change.html # # From Tim Parenti (2015-09-23): # This requires a new zone for the Northern Rockies Regional Municipality, # America/Fort_Nelson. The resolution of 2014-12-08 was reached following a # 2014-11-15 poll with nearly 75% support. Effectively, the municipality has # been on MST (-0700) like Dawson Creek since it advanced its clocks on # 2015-03-08. # # From Paul Eggert (2015-09-23): # Shanks says Fort Nelson did not observe DST in 1946, unlike Vancouver. a1846 6 Zone America/Fort_Nelson -8:10:47 - LMT 1884 -8:00 Vanc P%sT 1946 -8:00 - PST 1947 -8:00 Vanc P%sT 1987 -8:00 Canada P%sT 2015 Mar 8 2:00 -7:00 - MST d2439 1 a2439 1 # Coahuila, Nuevo León, Tamaulipas (near US border) d2445 1 a2445 1 # Durango; Coahuila, Nuevo León, Tamaulipas (away from US border) d2548 1 a2548 1 # Baja California d2568 19 a2598 7 # From Paul Eggert (2015-10-08): # Formerly there was an America/Santa_Isabel zone, but this appears to # have come from a misreading of # http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 # It has been moved to the 'backward' file. # # d2673 11 a2683 1 # See America/Panama. a3045 7 # From Steffen Thorsen (2016-03-12): # Jean Antoine, editor of www.haiti-reference.com informed us that Haiti # are not going on DST this year. Several other resources confirm this: ... # http://www.radiotelevisioncaraibes.com/presse/heure_d_t_pas_de_changement_d_heure_pr_vu_pour_cet_ann_e.html # http://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/ # http://news.anmwe.com/haiti-lheure-nationale-ne-sera-ni-avancee-ni-reculee-cette-annee/ d3056 2 a3057 2 Rule Haiti 2012 2015 - Mar Sun>=8 2:00 1:00 D Rule Haiti 2012 2015 - Nov Sun>=1 2:00 0 S a3205 1 Link America/Panama America/Cayman @ 1.1.1.1.4.5.2.1 log @Sync with netbsd-5 @ text @d27 2 a28 26 # From Paul Eggert (2016-09-21): # Dowd's proposal left many details unresolved, such as where to draw # lines between time zones. The key individual who made time zones # work in the US was William Frederick Allen - railway engineer, # managing editor of the Travelers' Guide, and secretary of the # General Time Convention, a railway standardization group. Allen # spent months in dialogs with scientific and railway leaders, # developed a workable plan to institute time zones, and presented it # to the General Time Convention on 1883-04-11, saying that his plan # meant "local time would be practically abolished" - a plus for # railway scheduling. By the next convention on 1883-10-11 nearly all # railroads had agreed and it took effect on 1883-11-18 at 12:00. # That Sunday was called the "day of two noons", as the eastern parts # of the new zones observed noon twice. Allen witnessed the # transition in New York City, writing: # # I heard the bells of St. Paul's strike on the old time. Four # minutes later, obedient to the electrical signal from the Naval # Observatory ... the time-ball made its rapid descent, the chimes # of old Trinity rang twelve measured strokes, and local time was # abandoned, probably forever. # # Most of the US soon followed suit. See: # Bartky IR. The adoption of standard time. Technol Cult 1989 Jan;30(1):25-56. # http://dx.doi.org/10.2307/3105430 a415 31 # From Paul Eggert (2016-08-20): # In early February 1948, in response to California's electricity shortage, # PG&E changed power frequency from 60 to 59.5 Hz during daylight hours, # causing electric clocks to lose six minutes per day. (This did not change # legal time, and is not part of the data here.) See: # Ross SA. An energy crisis from the past: Northern California in 1948. # Working Paper No. 8, Institute of Governmental Studies, UC Berkeley, # 1973-11. http://escholarship.org/uc/item/8x22k30c # # In another measure to save electricity, DST was instituted from 1948-03-14 # at 02:01 to 1949-01-16 at 02:00, with the governor having the option to move # the fallback transition earlier. See pages 3-4 of: # http://clerk.assembly.ca.gov/sites/clerk.assembly.ca.gov/files/archive/Statutes/1948/48Vol1_Chapters.pdf # # In response: # # Governor Warren received a torrent of objecting mail, and it is not too much # to speculate that the objections to Daylight Saving Time were one important # factor in the defeat of the Dewey-Warren Presidential ticket in California. # -- Ross, p 25 # # On December 8 the governor exercised the option, setting the date to January 1 # (LA Times 1948-12-09). The transition time was 02:00 (LA Times 1949-01-01). # # Despite the controversy, in 1949 California voters approved Proposition 12, # which established DST from April's last Sunday at 01:00 until September's # last Sunday at 02:00. This was amended by 1962's Proposition 6, which changed # the fall-back date to October's last Sunday. See: # http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props # http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props d418 1 a418 1 Rule CA 1948 only - Mar 14 2:01 1:00 D d420 1 a420 1 Rule CA 1950 1966 - Apr lastSun 1:00 1:00 D d2194 1 a2194 1 Zone America/Pangnirtung 0 - -00 1921 # trading post est. d2200 1 a2200 1 Zone America/Iqaluit 0 - -00 1942 Aug # Frobisher Bay est. d2205 1 a2205 1 Zone America/Resolute 0 - -00 1947 Aug 31 # Resolute founded d2212 1 a2212 1 Zone America/Rankin_Inlet 0 - -00 1957 # Rankin Inlet founded d2217 1 a2217 1 Zone America/Cambridge_Bay 0 - -00 1920 # trading post est.? d2223 1 a2223 1 Zone America/Yellowknife 0 - -00 1935 # Yellowknife founded? d2226 1 a2226 1 Zone America/Inuvik 0 - -00 1953 # Inuvik founded a2478 9 # This includes the following municipalities: # in Coahuila: Ocampo, Acuña, Zaragoza, Jiménez, Piedras Negras, Nava, # Guerrero, Hidalgo. # in Nuevo León: Anáhuac, Los Aldama. # in Tamaulipas: Nuevo Laredo, Guerrero, Mier, Miguel Alemán, Camargo, # Gustavo Díaz Ordaz, Reynosa, Río Bravo, Valle Hermoso, Matamoros. # See: Inicia mañana Horario de Verano en zona fronteriza, El Universal, # 2016-03-12 # http://www.eluniversal.com.mx/articulo/estados/2016/03/12/inicia-manana-horario-de-verano-en-zona-fronteriza a2499 3 # This includes the municipalities of Janos, Ascensión, Juárez, Guadalupe, # Práxedis G Guerrero, Coyame del Sotol, Ojinaga, and Manuel Benavides. # (See the 2016-03-12 El Universal source mentioned above.) d3272 1 a3272 1 # The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round. See: @ 1.1.1.1.4.5.2.2 log @Sync with netbsd-7-1-RELEASE @ text @d181 16 a252 15 # From Paul Eggert (2016-12-19): # Here are URLs for the 1918 and 1966 legislation: # http://uscode.house.gov/statviewer.htm?volume=40&page=451 # http://uscode.house.gov/statviewer.htm?volume=80&page=108 # Although the 1918 names were officially "United States Standard # Eastern Time" and similarly for "Central", "Mountain", "Pacific", # and "Alaska", in practice "Standard" was placed just before "Time", # as codified in 1966. In practice, Alaska time was abbreviated "AST" # before 1968. Summarizing the 1967 name changes: # 1918 names 1967 names # -08 Standard Pacific Time (PST) Pacific standard time (PST) # -09 (unofficial) Yukon (YST) Yukon standard time (YST) # -10 Standard Alaska Time (AST) Alaska-Hawaii standard time (AHST) # -11 (unofficial) Nome (NST) Bering standard time (BST) # a307 9 # # From Paul Eggert (2017-02-22): # Four cities are involved. The two not mentioned above are Smiths Station # and Valley. Barbara Brooks, Valley's assistant treasurer, heard it started # because West Point Pepperell textile mills were in Alabama while the # corporate office was in Georgia, and residents voted to keep Eastern # time even after the mills closed. See: Kazek K. Did you know which # Alabama towns are in a different time zone? al.com 2017-02-06. # http://www.al.com/living/index.ssf/2017/02/do_you_know_which_alabama_town.html d485 1 a485 1 # AK%sT is the modern abbreviation for -09 per USNO. d591 4 a594 2 -10:00 - AST 1942 -10:00 US A%sT 1967 Apr d683 1 d1071 1 a1071 1 # From Paul Eggert (2017-02-10): d1078 2 a1079 2 # Many years ago Gwillim Law wrote that a good source # for time zone data was the International Air Transport d2737 6 a2742 6 Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 -0530 Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 CST Rule Belize 1973 only - Dec 5 0:00 1:00 CDT Rule Belize 1974 only - Feb 9 0:00 0 CST Rule Belize 1982 only - Dec 18 0:00 1:00 CDT Rule Belize 1983 only - Feb 12 0:00 0 CST d2745 1 a2745 1 -6:00 Belize %s d3017 6 a3022 6 Rule DR 1966 only - Oct 30 0:00 1:00 EDT Rule DR 1967 only - Feb 28 0:00 0 EST Rule DR 1969 1973 - Oct lastSun 0:00 0:30 -0430 Rule DR 1970 only - Feb 21 0:00 0 EST Rule DR 1971 only - Jan 20 0:00 0 EST Rule DR 1972 1974 - Jan 21 0:00 0 EST d3026 1 a3026 1 -5:00 DR %s 1974 Oct 27 d3316 2 a3317 2 -3:00 - -03 1987 -3:00 Canada -03/-02 @ 1.1.1.1.4.6 log @Pull up following revision(s) (requested by kre in ticket #1324): distrib/sets/lists/base/mi: 1.1125, 1.1128, 1.1132, 1.1137, 1.1139, 1.1140 external/public-domain/tz/dist/CONTRIBUTING: up to 1.1.1.3 external/public-domain/tz/dist/LICENSE: up to 1.1.1.2 external/public-domain/tz/dist/Makefile: up to 1.1.1.16 external/public-domain/tz/dist/NEWS: up to 1.1.1.16 external/public-domain/tz/dist/README: up to 1.1.1.5 external/public-domain/tz/dist/TZDATA_VERSION: up to 1.6 external/public-domain/tz/dist/Theory: up to 1.1.1.9 external/public-domain/tz/dist/africa: up to 1.1.1.9 external/public-domain/tz/dist/antarctica: up to 1.1.1.7 external/public-domain/tz/dist/asia: up to 1.1.1.15 external/public-domain/tz/dist/australasia: up to 1.1.1.10 external/public-domain/tz/dist/backward: up to 1.1.1.6 external/public-domain/tz/dist/backzone: up to 1.1.1.10 external/public-domain/tz/dist/etcetera: up to 1.1.1.2 external/public-domain/tz/dist/europe: up to 1.1.1.16 external/public-domain/tz/dist/factory: up to 1.1.1.2 external/public-domain/tz/dist/iso3166.tab: up to 1.1.1.4 external/public-domain/tz/dist/leap-seconds.list: up to 1.1.1.6 external/public-domain/tz/dist/leapseconds: up to 1.1.1.7 external/public-domain/tz/dist/northamerica: up to 1.1.1.14 external/public-domain/tz/dist/southamerica: up to 1.1.1.10 external/public-domain/tz/dist/version: up to 1.1.1.3 external/public-domain/tz/dist/zone.tab: up to 1.1.1.10 external/public-domain/tz/dist/zone1970.tab: up to 1.1.1.12 external/public-domain/tz/share/zoneinfo/Makefile: up to 1.3 external/public-domain/tz/tzdata2netbsd: up to 1.11 Update tzdata to 2016j. @ text @d27 2 a28 26 # From Paul Eggert (2016-09-21): # Dowd's proposal left many details unresolved, such as where to draw # lines between time zones. The key individual who made time zones # work in the US was William Frederick Allen - railway engineer, # managing editor of the Travelers' Guide, and secretary of the # General Time Convention, a railway standardization group. Allen # spent months in dialogs with scientific and railway leaders, # developed a workable plan to institute time zones, and presented it # to the General Time Convention on 1883-04-11, saying that his plan # meant "local time would be practically abolished" - a plus for # railway scheduling. By the next convention on 1883-10-11 nearly all # railroads had agreed and it took effect on 1883-11-18 at 12:00. # That Sunday was called the "day of two noons", as the eastern parts # of the new zones observed noon twice. Allen witnessed the # transition in New York City, writing: # # I heard the bells of St. Paul's strike on the old time. Four # minutes later, obedient to the electrical signal from the Naval # Observatory ... the time-ball made its rapid descent, the chimes # of old Trinity rang twelve measured strokes, and local time was # abandoned, probably forever. # # Most of the US soon followed suit. See: # Bartky IR. The adoption of standard time. Technol Cult 1989 Jan;30(1):25-56. # http://dx.doi.org/10.2307/3105430 a415 31 # From Paul Eggert (2016-08-20): # In early February 1948, in response to California's electricity shortage, # PG&E changed power frequency from 60 to 59.5 Hz during daylight hours, # causing electric clocks to lose six minutes per day. (This did not change # legal time, and is not part of the data here.) See: # Ross SA. An energy crisis from the past: Northern California in 1948. # Working Paper No. 8, Institute of Governmental Studies, UC Berkeley, # 1973-11. http://escholarship.org/uc/item/8x22k30c # # In another measure to save electricity, DST was instituted from 1948-03-14 # at 02:01 to 1949-01-16 at 02:00, with the governor having the option to move # the fallback transition earlier. See pages 3-4 of: # http://clerk.assembly.ca.gov/sites/clerk.assembly.ca.gov/files/archive/Statutes/1948/48Vol1_Chapters.pdf # # In response: # # Governor Warren received a torrent of objecting mail, and it is not too much # to speculate that the objections to Daylight Saving Time were one important # factor in the defeat of the Dewey-Warren Presidential ticket in California. # -- Ross, p 25 # # On December 8 the governor exercised the option, setting the date to January 1 # (LA Times 1948-12-09). The transition time was 02:00 (LA Times 1949-01-01). # # Despite the controversy, in 1949 California voters approved Proposition 12, # which established DST from April's last Sunday at 01:00 until September's # last Sunday at 02:00. This was amended by 1962's Proposition 6, which changed # the fall-back date to October's last Sunday. See: # http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props # http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props d418 1 a418 1 Rule CA 1948 only - Mar 14 2:01 1:00 D d420 1 a420 1 Rule CA 1950 1966 - Apr lastSun 1:00 1:00 D d2194 1 a2194 1 Zone America/Pangnirtung 0 - -00 1921 # trading post est. d2200 1 a2200 1 Zone America/Iqaluit 0 - -00 1942 Aug # Frobisher Bay est. d2205 1 a2205 1 Zone America/Resolute 0 - -00 1947 Aug 31 # Resolute founded d2212 1 a2212 1 Zone America/Rankin_Inlet 0 - -00 1957 # Rankin Inlet founded d2217 1 a2217 1 Zone America/Cambridge_Bay 0 - -00 1920 # trading post est.? d2223 1 a2223 1 Zone America/Yellowknife 0 - -00 1935 # Yellowknife founded? d2226 1 a2226 1 Zone America/Inuvik 0 - -00 1953 # Inuvik founded a2478 9 # This includes the following municipalities: # in Coahuila: Ocampo, Acuña, Zaragoza, Jiménez, Piedras Negras, Nava, # Guerrero, Hidalgo. # in Nuevo León: Anáhuac, Los Aldama. # in Tamaulipas: Nuevo Laredo, Guerrero, Mier, Miguel Alemán, Camargo, # Gustavo Díaz Ordaz, Reynosa, Río Bravo, Valle Hermoso, Matamoros. # See: Inicia mañana Horario de Verano en zona fronteriza, El Universal, # 2016-03-12 # http://www.eluniversal.com.mx/articulo/estados/2016/03/12/inicia-manana-horario-de-verano-en-zona-fronteriza a2499 3 # This includes the municipalities of Janos, Ascensión, Juárez, Guadalupe, # Práxedis G Guerrero, Coyame del Sotol, Ojinaga, and Manuel Benavides. # (See the 2016-03-12 El Universal source mentioned above.) d3272 1 a3272 1 # The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round. See: @ 1.1.1.1.4.7 log @Pull up following revision(s) (requested by kre in ticket #1374): doc/3RDPARTY: 1.1420 via patch distrib/sets/lists/base/mi: 1.1155 external/public-domain/tz/dist/Makefile: up to 1.1.1.17 external/public-domain/tz/dist/NEWS: up to 1.1.1.17 external/public-domain/tz/dist/TZDATA_VERSION: up to 1.7 external/public-domain/tz/dist/Theory: up to 1.1.1.10 external/public-domain/tz/dist/africa: up to 1.1.1.10 external/public-domain/tz/dist/antarctica: up to 1.1.1.8 external/public-domain/tz/dist/asia: up to 1.1.1.16 external/public-domain/tz/dist/australasia: up to 1.1.1.11 external/public-domain/tz/dist/backward: up to 1.1.1.7 external/public-domain/tz/dist/backzone: up to 1.1.1.11 external/public-domain/tz/dist/europe: up to 1.1.1.17 external/public-domain/tz/dist/leap-seconds.list: up to 1.1.1.7 external/public-domain/tz/dist/leapseconds: up to 1.1.1.8 external/public-domain/tz/dist/northamerica: up to 1.1.1.15 external/public-domain/tz/dist/southamerica: up to 1.1.1.11 external/public-domain/tz/dist/version: up to 1.1.1.4 external/public-domain/tz/dist/zone.tab: up to 1.1.1.11 external/public-domain/tz/dist/zone1970.tab: up to 1.1.1.13 Update to tzdata2017a. @ text @d181 16 a252 15 # From Paul Eggert (2016-12-19): # Here are URLs for the 1918 and 1966 legislation: # http://uscode.house.gov/statviewer.htm?volume=40&page=451 # http://uscode.house.gov/statviewer.htm?volume=80&page=108 # Although the 1918 names were officially "United States Standard # Eastern Time" and similarly for "Central", "Mountain", "Pacific", # and "Alaska", in practice "Standard" was placed just before "Time", # as codified in 1966. In practice, Alaska time was abbreviated "AST" # before 1968. Summarizing the 1967 name changes: # 1918 names 1967 names # -08 Standard Pacific Time (PST) Pacific standard time (PST) # -09 (unofficial) Yukon (YST) Yukon standard time (YST) # -10 Standard Alaska Time (AST) Alaska-Hawaii standard time (AHST) # -11 (unofficial) Nome (NST) Bering standard time (BST) # a307 9 # # From Paul Eggert (2017-02-22): # Four cities are involved. The two not mentioned above are Smiths Station # and Valley. Barbara Brooks, Valley's assistant treasurer, heard it started # because West Point Pepperell textile mills were in Alabama while the # corporate office was in Georgia, and residents voted to keep Eastern # time even after the mills closed. See: Kazek K. Did you know which # Alabama towns are in a different time zone? al.com 2017-02-06. # http://www.al.com/living/index.ssf/2017/02/do_you_know_which_alabama_town.html d485 1 a485 1 # AK%sT is the modern abbreviation for -09 per USNO. d591 4 a594 2 -10:00 - AST 1942 -10:00 US A%sT 1967 Apr d683 1 d1071 1 a1071 1 # From Paul Eggert (2017-02-10): d1078 2 a1079 2 # Many years ago Gwillim Law wrote that a good source # for time zone data was the International Air Transport d2737 6 a2742 6 Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 -0530 Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 CST Rule Belize 1973 only - Dec 5 0:00 1:00 CDT Rule Belize 1974 only - Feb 9 0:00 0 CST Rule Belize 1982 only - Dec 18 0:00 1:00 CDT Rule Belize 1983 only - Feb 12 0:00 0 CST d2745 1 a2745 1 -6:00 Belize %s d3017 6 a3022 6 Rule DR 1966 only - Oct 30 0:00 1:00 EDT Rule DR 1967 only - Feb 28 0:00 0 EST Rule DR 1969 1973 - Oct lastSun 0:00 0:30 -0430 Rule DR 1970 only - Feb 21 0:00 0 EST Rule DR 1971 only - Jan 20 0:00 0 EST Rule DR 1972 1974 - Jan 21 0:00 0 EST d3026 1 a3026 1 -5:00 DR %s 1974 Oct 27 d3316 2 a3317 2 -3:00 - -03 1987 -3:00 Canada -03/-02 @ 1.1.1.1.4.8 log @Pull up following revision(s) (requested by kre in ticket #1450): doc/3RDPARTY: revision 1.1425 via patch external/public-domain/tz/dist/NEWS: up to 1.1.1.18 external/public-domain/tz/dist/TZDATA_VERSION: up to 1.8 external/public-domain/tz/dist/africa: up to 1.1.1.11 external/public-domain/tz/dist/iso3166.tab: up to 1.1.1.5 external/public-domain/tz/dist/northamerica: up to 1.1.1.16 external/public-domain/tz/dist/version: up to 1.1.1.5 Update tzdata to 2017b. @ text @a3141 6 # From Steffen Thorsen (2017-03-12): # We have received 4 mails from different people telling that Haiti # has started DST again today, and this source seems to confirm that, # I have not been able to find a more authoritative source: # https://www.haitilibre.com/en/news-20319-haiti-notices-time-change-in-haiti.html a3153 2 Rule Haiti 2017 max - Mar Sun>=8 2:00 1:00 D Rule Haiti 2017 max - Nov Sun>=1 2:00 0 S @ 1.1.1.1.4.9 log @Pull up following revision(s) (requested by kre in ticket #1519): distrib/sets/lists/base/mi: 1.1164 doc/3RDPARTY: 1.2326 via patch external/public-domain/tz/dist/CONTRIBUTING: up to 1.1.1.4 external/public-domain/tz/dist/LICENSE: up to 1.1.1.3 external/public-domain/tz/dist/Makefile: up to 1.1.1.18 external/public-domain/tz/dist/NEWS: up to 1.1.1.19 external/public-domain/tz/dist/TZDATA_VERSION: up to 1.9 external/public-domain/tz/dist/Theory: delete external/public-domain/tz/dist/africa: up to 1.1.1.12 external/public-domain/tz/dist/antarctica: up to 1.1.1.9 external/public-domain/tz/dist/asia: up to 1.1.1.17 external/public-domain/tz/dist/australasia: up to 1.1.1.12 external/public-domain/tz/dist/backward: up to 1.1.1.8 external/public-domain/tz/dist/backzone: up to 1.1.1.12 external/public-domain/tz/dist/calendars: up to 1.1.1.1 external/public-domain/tz/dist/checklinks.awk: up to 1.1.1.3 external/public-domain/tz/dist/europe: up to 1.1.1.18 external/public-domain/tz/dist/leap-seconds.list: up to 1.1.1.8 external/public-domain/tz/dist/leapseconds: up to 1.1.1.9 external/public-domain/tz/dist/leapseconds.awk: up to 1.1.1.6 external/public-domain/tz/dist/northamerica: up to 1.1.1.17 external/public-domain/tz/dist/southamerica: up to 1.1.1.12 external/public-domain/tz/dist/theory.html: up to 1.1.1.1 external/public-domain/tz/dist/version: up to 1.1.1.6 external/public-domain/tz/dist/zishrink.awk: up to 1.1.1.1 external/public-domain/tz/dist/zone.tab: up to 1.1.1.12 external/public-domain/tz/dist/zone1970.tab: up to 1.1.1.14 Update tzdata to 2017c. @ text @d108 1 a108 1 # https://web.archive.org/web/20000926032210/http://rowayton.org/rhs/hstaug45.html a111 3 # # From Paul Eggert (2017-09-23): # This was the V-J Day issue of the Clamdigger, a Rowayton, CT newsletter. d260 1 a260 1 # https://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf d349 1 a349 1 # https://docs.legis.wisconsin.gov/statutes/statutes/175.pdf d358 1 a358 1 # https://docs.legis.wisconsin.gov/2007/related/acts/3 d405 1 a405 1 # https://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm d456 1 a456 1 # 1973-11. https://escholarship.org/uc/item/8x22k30c d477 2 a478 2 # https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props # https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props d495 1 a495 1 # From Paul Eggert (2017-06-15): d498 4 a501 10 # On Friday, 1867-10-18 (Gregorian), at precisely 15:30 local time, the # Russian forts and fleet at Sitka fired salutes to mark the ceremony of # formal transfer. See the Sacramento Daily Union (1867-11-14), p 3, col 2. # https://cdnc.ucr.edu/cgi-bin/cdnc?a=d&d=SDU18671114.2.12.1 # Sitka workers did not change their calendars until Sunday, 1867-10-20, # and so celebrated two Sundays that week. See: Ahllund T (tr Hallamaa P). # From the memoirs of a Finnish workman. Alaska History. 2006 Fall;21(2):1-25. # http://alaskahistoricalsociety.org/wp-content/uploads/2016/12/Ahllund-2006-Memoirs-of-a-Finnish-Workman.pdf # Include only the time zone part of this transition, ignoring the switch # from Julian to Gregorian, since we can't represent the Julian calendar. d503 1 a503 1 # As far as we know, of the locations mentioned below only Sitka was d505 4 a508 9 # (Yakutat was colonized by the Russians in 1799, but the settlement was # destroyed in 1805 by a Yakutat-kon war party.) Many of Alaska's inhabitants # were unaware of the US acquisition of Alaska, much less of any calendar or # time change. However, the Russian-influenced part of Alaska did observe # Russian time, and it is more accurate to model this than to ignore it. # The database format requires an exact transition time; use the Russian # salute as a somewhat-arbitrary time for the formal transfer of control for # all of Alaska. Sitka's UTC offset is -9:01:13; adjust its 15:30 to the # local times of other Alaskan locations so that they change simultaneously. d561 1 a561 1 # https://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/ d564 1 a564 1 Zone America/Juneau 15:02:19 - LMT 1867 Oct 19 15:33:32 d574 1 a574 1 Zone America/Sitka 14:58:47 - LMT 1867 Oct 19 15:30 d582 1 a582 1 Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 19 15:44:55 d590 1 a590 1 Zone America/Yakutat 14:41:05 - LMT 1867 Oct 19 15:12:18 d597 1 a597 1 Zone America/Anchorage 14:00:24 - LMT 1867 Oct 19 14:31:37 d605 1 a605 1 Zone America/Nome 12:58:22 - LMT 1867 Oct 19 13:29:35 d614 1 a614 1 Zone America/Adak 12:13:22 - LMT 1867 Oct 19 12:44:35 d650 1 a650 1 # https://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf d749 1 a749 1 # https://en.wikipedia.org/wiki/Time_in_Indiana d976 1 a976 1 # https://www.gpo.gov/fdsys/pkg/FR-2000-08-17/html/00-20854.htm d1002 1 a1002 1 # https://www.gpo.gov/fdsys/pkg/FR-1999-10-21/html/99-27240.htm a1031 13 # From Paul Eggert (2017-07-26): # Although Shanks says Detroit observed DST in 1967 from 06-14 00:01 # until 10-29 00:01, I now see multiple reports that this is incorrect. # For example, according to a 50-year anniversary report about the 1967 # Detroit riots and a major-league doubleheader on 1967-07-23, "By the time # the last fly ball of the doubleheader settled into the glove of leftfielder # Lenny Green, it was after 7 p.m. Detroit did not observe daylight saving # time, so light was already starting to fail. Twilight was made even deeper # by billowing columns of smoke that ascended in an unbroken wall north of the # ballpark." See: Dow B. Detroit '67: As violence unfolded, Tigers played two # at home vs. Yankees. Detroit Free Press 2017-07-23. # https://www.freep.com/story/sports/mlb/tigers/2017/07/23/detroit-tigers-1967-riot-new-york-yankees/499951001/ # d1036 2 d1101 1 a1101 1 # . d1147 1 a1147 1 # https://archive.news.gov.bc.ca/releases/news_releases_2005-2009/2006AG0014-000330.htm d1151 1 a1151 1 # https://www.novascotia.ca/just/regulations/rg2/2006/ma1206.pdf d1155 1 a1155 1 # https://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf d1159 1 a1159 1 # https://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php d1173 1 a1173 1 # https://www.gov.yk.ca/legislation/regs/oic2006_127.pdf d1194 2 a1195 2 # https://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html # https://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5 d1232 5 a1236 7 # From Paul Eggert (2017-10-14): # Legally Labrador should observe Newfoundland time; see: # McLeod J. Labrador time - legal or not? St. John's Telegram, 2017-10-07 # http://www.thetelegram.com/news/local/labrador-time--legal-or-not-154860/ # Matthews and Vincent (1998) write that the only part of Labrador # that follows the rules is the southeast corner, including Port Hope # Simpson and Mary's Harbour, but excluding, say, Black Tickle. d1436 1 a1436 1 # https://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en a1467 5 # # From Paul Eggert (2017-07-08): # For more on Orillia, see: Daubs K. Bold attempt at daylight saving # time became a comic failure in Orillia. Toronto Star 2017-07-08. # https://www.thestar.com/news/insight/2017/07/08/bold-attempt-at-daylight-saving-time-became-a-comic-failure-in-orillia.html d1959 1 a1959 1 # [https://www.canlii.org/en/ca/laws/stat/rsc-1985-c-i-21/latest/rsc-1985-c-i-21.html] d2024 1 a2024 1 # https://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html d2039 1 a2039 1 # https://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html d2051 1 a2051 1 # https://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html d2065 1 a2065 1 # https://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html d2108 1 a2108 1 # http://www.nunatsiaqonline.ca/archives/nunavut991130/nvt91119_17.html d2126 1 a2126 1 # From d2457 1 a2457 1 # https://www.timeanddate.com/news/time/north-mexico-dst-change.html d2876 1 a2876 1 # https://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html d2923 1 a2923 1 # https://www.timeanddate.com/news/time/cuba-starts-dst-2011.html d2933 1 a2933 1 # https://www.timeanddate.com/news/time/cuba-time-changes-2011.html d2943 1 a2943 1 # https://www.timeanddate.com/news/time/cuba-starts-dst-2012.html d3138 2 a3139 2 # https://www.radiotelevisioncaraibes.com/presse/heure_d_t_pas_de_changement_d_heure_pr_vu_pour_cet_ann_e.html # https://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/ d3338 1 a3338 1 # https://bugs.debian.org/415007 a3359 12 # From the Turks & Caicos Cabinet (2017-07-20), heads-up from Steffen Thorsen: # ... agreed to the reintroduction in TCI of Daylight Saving Time (DST) # during the summer months and Standard Time, also known as Local # Time, during the winter months with effect from April 2018 ... # https://www.gov.uk/government/news/turks-and-caicos-post-cabinet-meeting-statement--3 # # From Paul Eggert (2017-08-26): # The date of effect of the spring 2018 change appears to be March 11, # which makes more sense. See: Hamilton D. Time change back # by March 2018 for TCI. Magnetic Media. 2017-08-25. # http://magneticmediatv.com/2017/08/time-change-back-by-march-2018-for-tci/ # d3365 1 a3365 2 -4:00 - AST 2018 Mar 11 3:00 -5:00 US E%sT @ 1.1.1.1.4.10 log @Pull up the following revisions, requested by kre in tickt #1589: external/public-domain/tz/dist/ziguard.awk up to 1.1.1.1 external/public-domain/tz/dist/CONTRIBUTING up to 1.1.1.5 external/public-domain/tz/dist/Makefile up to 1.1.1.20 external/public-domain/tz/dist/NEWS up to 1.1.1.21 external/public-domain/tz/dist/README up to 1.1.1.6 external/public-domain/tz/dist/TZDATA_VERSION up to 1.11 external/public-domain/tz/dist/africa up to 1.1.1.14 external/public-domain/tz/dist/antarctica up to 1.1.1.10 external/public-domain/tz/dist/asia up to 1.1.1.19 external/public-domain/tz/dist/australasia up to 1.1.1.14 external/public-domain/tz/dist/backzone up to 1.1.1.14 external/public-domain/tz/dist/checktab.awk up to 1.1.1.9 external/public-domain/tz/dist/europe up to 1.1.1.20 external/public-domain/tz/dist/leap-seconds.list up to 1.1.1.9 external/public-domain/tz/dist/leapseconds up to 1.1.1.10 external/public-domain/tz/dist/northamerica up to 1.1.1.19 external/public-domain/tz/dist/southamerica up to 1.1.1.14 external/public-domain/tz/dist/theory.html up to 1.1.1.3 external/public-domain/tz/dist/version up to 1.1.1.8 external/public-domain/tz/dist/zishrink.awk up to 1.1.1.3 external/public-domain/tz/dist/zone.tab up to 1.1.1.14 external/public-domain/tz/dist/zone1970.tab up to 1.1.1.16 Update of /cvsroot/src/external/public-domain/tz/dist In directory ivanova.netbsd.org:/tmp/cvs-serv18468 Log Message: Import tzdata2018d from ftp://ftp.iana.org/tz/releases/tzdata2018d.tar.gz Summary of changes in tzdata2018d (2018-03-22 07:05:46 -0700): In 2018, Palestine starts DST on March 24 (today!), not March 31 Casey Station in Antarctica changed from +11 to +08 on 2018-03-11 at 04:00. Various adjustments to some historical conversions (several for Uruguay (1920 .. 1990), one fpr Enderbury and Kiritimati (1994/5), one for Portugal and colonies (1912) and Jamaica and Turks & Caicos (pre 1913)). @ text @d28 1 a28 1 # From Paul Eggert (2018-03-20): d39 4 a42 3 # railroads had agreed and it took effect on 1883-11-18. That Sunday # was called the "day of two noons", as some locations observed noon # twice. Allen witnessed the transition in New York City, writing: a350 12 # From Paul Eggert (2018-01-07): # In 1869 the Chicago Astronomical Society contracted with the city to keep # time. Though delayed by the Great Fire, by 1880 a wire ran from the # Dearborn Observatory (on the University of Chicago campus) to City Hall, # which then sent signals to police and fire stations. However, railroads got # their time signals from the Allegheny Observatory, the Madison Observatory, # the Ann Arbor Observatory, etc., so their clocks did not agree with each # other or with the city's official time. The confusion took some years to # clear up. See: # Moser M. How Chicago gave America its time zones. Chicago. 2018-01-04. # http://www.chicagomag.com/city-life/January-2018/How-Chicago-Gave-America-Its-Time-Zones/ d415 2 a416 1 # at 47° 15' 51" N, 101° 46' 40" W, which yields an offset of 6h47'07". d449 1 a449 1 # Nevada (except West Wendover), Oregon (except the northern ¾ of a946 7 # From Paul Eggert (2018-03-20): # The Louisville & Nashville Railroad's 1883-11-18 change occurred at # 10:00 old local time; train were supposed to come to a standstill # for precisely 18 minutes. See Bartky Fig. 1 (page 50). It is not # clear how this matched civil time in Louisville, so for now continue # to assume Louisville switched at noon new local time, like New York. # d1899 1 a1899 1 # i.e. Creston has been stuck on UT-7 for 93 years. d3255 2 a3256 2 Zone America/Jamaica -5:07:10 - LMT 1890 # Kingston -5:07:10 - KMT 1912 Feb # Kingston Mean Time d3406 1 a3406 1 -5:07:10 - KMT 1912 Feb # Kingston Mean Time @ 1.1.1.1.4.11 log @Sync external/public-domain/tz/dist to current, requested by kre in ticket #1644: external/public-domain/tz/dist/CONTRIBUTING up to 1.1.1.6 external/public-domain/tz/dist/Makefile up to 1.1.1.22 external/public-domain/tz/dist/NEWS up to 1.1.1.24 external/public-domain/tz/dist/README up to 1.1.1.7 external/public-domain/tz/dist/TZDATA_VERSION up to 1.14 external/public-domain/tz/dist/africa up to 1.1.1.17 external/public-domain/tz/dist/antarctica up to 1.1.1.11 external/public-domain/tz/dist/asia up to 1.1.1.21 external/public-domain/tz/dist/australasia up to 1.1.1.16 external/public-domain/tz/dist/backward up to 1.1.1.9 external/public-domain/tz/dist/backzone up to 1.1.1.15 external/public-domain/tz/dist/etcetera up to 1.1.1.3 external/public-domain/tz/dist/europe up to 1.1.1.23 external/public-domain/tz/dist/factory up to 1.1.1.3 external/public-domain/tz/dist/leap-seconds.list up to 1.1.1.10 external/public-domain/tz/dist/leapseconds up to 1.1.1.11 external/public-domain/tz/dist/leapseconds.awk up to 1.1.1.7 external/public-domain/tz/dist/northamerica up to 1.1.1.21 external/public-domain/tz/dist/pacificnew up to 1.1.1.2 external/public-domain/tz/dist/southamerica up to 1.1.1.15 external/public-domain/tz/dist/systemv up to 1.1.1.2 external/public-domain/tz/dist/theory.html up to 1.1.1.6 external/public-domain/tz/dist/version up to 1.1.1.11 external/public-domain/tz/dist/yearistype.sh up to 1.1.1.2 external/public-domain/tz/dist/ziguard.awk up to 1.1.1.3 external/public-domain/tz/dist/zishrink.awk up to 1.1.1.5 external/public-domain/tz/dist/zone.tab up to 1.1.1.15 external/public-domain/tz/dist/zone1970.tab up to 1.1.1.17 external/public-domain/tz/dist/zoneinfo2tdf.pl up to 1.1.1.2 doc/3RDPARTY (apply patch) Import tzdata2018f from ftp://ftp.iana.org/tz/releases/tzdata2018f.tar.gz Volgograd moves from +03 to +04 on 2018-10-28. Fiji ends DST 2019-01-13, not 2019-01-20. Most of Chile changes DST dates, effective 2019-04-06. Plus corrections to North Korea's 2018-05-05 and China's April 1988 updates (getting the actual time/date of the transition correct) Corrections for Macau pre 1992, Japan in late 1940's - early 1950's, and China (Shanghai) 1940's. The Phillipines get their timezone name abbreviations back. - Import tzdata2018g from ftp://ftp.iana.org/tz/releases/tzdata2018g.tar.gz Summary of changes in tzdata2018g (2018-10-26 22:22:45 -0700): Morocco switches to permanent +01 on 2018-10-27. @ text @a0 2 # tzdb data for North and Central America and environs d51 1 a51 1 # https://dx.doi.org/10.2307/3105430 a439 13 # From Paul Eggert (2018-10-25): # On 1921-03-04 federal law placed all of Texas into the central time zone. # However, El Paso ignored the law for decades and continued to observe # mountain time, on the grounds that that's what they had always done # and they weren't about to let the federal government tell them what to do. # Eventually the federal government gave in and changed the law on # 1970-04-10 to match what El Paso was actually doing. Although # that's slightly after our 1970 cutoff, there is no need to create a # separate zone for El Paso since they were ignoring the law anyway. See: # Long T. El Pasoans were time rebels, fought to stay in Mountain zone. # El Paso Times. 2018-10-24 06:40 -06. # https://www.elpasotimes.com/story/news/local/el-paso/2018/10/24/el-pasoans-were-time-rebels-fought-stay-mountain-zone/1744509002/ # d709 3 a711 1 -10:30 US H%sT 1947 Jun 8 2:00 @ 1.1.1.1.4.12 log @Pull up the following, requested by kre in ticket #1670: external/public-domain/tz/dist/Makefile up to 1.1.1.23 external/public-domain/tz/dist/NEWS up to 1.1.1.26 external/public-domain/tz/dist/TZDATA_VERSION up to 1.16 external/public-domain/tz/dist/africa up to 1.1.1.19 external/public-domain/tz/dist/asia up to 1.1.1.22 external/public-domain/tz/dist/australasia up to 1.1.1.17 external/public-domain/tz/dist/leapseconds up to 1.1.1.12 external/public-domain/tz/dist/leapseconds.awk up to 1.1.1.8 external/public-domain/tz/dist/northamerica up to 1.1.1.22 external/public-domain/tz/dist/theory.html up to 1.1.1.7 external/public-domain/tz/dist/version up to 1.1.1.13 external/public-domain/tz/dist/ziguard.awk up to 1.1.1.4 external/public-domain/tz/dist/zone.tab up to 1.1.1.16 external/public-domain/tz/dist/zone1970.tab up to 1.1.1.18 distrib/sets/lists/base/mi (patch) doc/3RDPARTY (patch) Import tzdata2018h from ftp://ftp.iana.org/tz/releases/tzdata2018h.tar.gz Summary of changes in tzdata2018h (2018-12-23 17:59:32 -0800): Qyzylorda (aka Kyzylorda) oblast in Kazakhstan moved from +06 to +05 on 2018-12-21. This is a zone split as Qostanay (aka Kostanay) did not switch, so create a zone Asia/Qostanay. Metlakatla, Alaska observes PST this winter only. Add predictions for Iran from 2038 through 2090. Changes to some old timestamps for Nauru (1979) Guam (1959-77), Hong Kong (1904, 1941, 1945, 1952) (others in Pacific during WWII) --- Merge tzdata2018h --- Update to tzdata2018h (new zone Asia/Qostanay) --- Import tzdata2018i from ftp://ftp.iana.org/tz/releases/tzdata2018i.tar.gz Summary of changes in tzdata2018i (2018-12-30 11:05:43 -0800): Due to a change in government, Sao Tome and Principe switches back from +01 to +00 on 2019-01-01 at 02:00. --- Merge tzdata2018i --- Update to tzdata2018i @ text @a601 11 # From Ryan Stanley (2018-11-06): # The Metlakatla community in Alaska has decided not to change its # clock back an hour starting on November 4th, 2018 (day before yesterday). # They will be gmtoff=-28800 year-round. # https://www.facebook.com/141055983004923/photos/pb.141055983004923.-2207520000.1541465673./569081370202380/ # From Paul Eggert (2018-12-16): # In a 2018-12-11 special election, Metlakatla voted to go back to # Alaska time (including daylight saving time) starting next year. # https://www.krbd.org/2018/12/12/metlakatla-to-follow-alaska-standard-time-allow-liquor-sales/ a627 2 -9:00 US AK%sT 2018 Nov 4 2:00 -8:00 - PST 2019 Mar Sun>=8 3:00 a787 16 # From Paul Eggert (2018-11-30): # A brief but entertaining history of time in Indiana describes a 1949 debate # in the Indiana House where city legislators (who favored "fast time") # tussled with farm legislators (who didn't) over a bill to outlaw DST: # "Lacking enough votes, the city faction tries to filibuster until time runs # out on the session at midnight, but rural champion Rep. Herbert Copeland, # R-Madison, leans over the gallery railing and forces the official clock # back to 9 p.m., breaking it in the process. The clock sticks on 9 as the # debate rages on into the night. The filibuster finally dies out and the # bill passes, while outside the chamber, clocks read 3:30 a.m. In the end, # it doesn't matter which side won. The law has no enforcement powers and # is simply ignored by fast-time communities." # How Indiana went from 'God's time' to split zones and daylight-saving. # Indianapolis Star. 2018-11-27 14:58 -05. # https://www.indystar.com/story/news/politics/2018/11/27/indianapolis-indiana-time-zone-history-central-eastern-daylight-savings-time/2126300002/ # @ 1.1.1.1.4.7.2.1 log @Pull up following revision(s) (requested by kre in ticket #1450): doc/3RDPARTY: revision 1.1425 via patch external/public-domain/tz/dist/NEWS: up to 1.1.1.18 external/public-domain/tz/dist/TZDATA_VERSION: up to 1.8 external/public-domain/tz/dist/africa: up to 1.1.1.11 external/public-domain/tz/dist/iso3166.tab: up to 1.1.1.5 external/public-domain/tz/dist/northamerica: up to 1.1.1.16 external/public-domain/tz/dist/version: up to 1.1.1.5 Update tzdata to 2017b. @ text @a3141 6 # From Steffen Thorsen (2017-03-12): # We have received 4 mails from different people telling that Haiti # has started DST again today, and this source seems to confirm that, # I have not been able to find a more authoritative source: # https://www.haitilibre.com/en/news-20319-haiti-notices-time-change-in-haiti.html a3153 2 Rule Haiti 2017 max - Mar Sun>=8 2:00 1:00 D Rule Haiti 2017 max - Nov Sun>=1 2:00 0 S @ 1.1.1.1.4.7.2.2 log @Pull up following revision(s) (requested by kre in ticket #1519): distrib/sets/lists/base/mi: 1.1164 doc/3RDPARTY: 1.2326 via patch external/public-domain/tz/dist/CONTRIBUTING: up to 1.1.1.4 external/public-domain/tz/dist/LICENSE: up to 1.1.1.3 external/public-domain/tz/dist/Makefile: up to 1.1.1.18 external/public-domain/tz/dist/NEWS: up to 1.1.1.19 external/public-domain/tz/dist/TZDATA_VERSION: up to 1.9 external/public-domain/tz/dist/Theory: delete external/public-domain/tz/dist/africa: up to 1.1.1.12 external/public-domain/tz/dist/antarctica: up to 1.1.1.9 external/public-domain/tz/dist/asia: up to 1.1.1.17 external/public-domain/tz/dist/australasia: up to 1.1.1.12 external/public-domain/tz/dist/backward: up to 1.1.1.8 external/public-domain/tz/dist/backzone: up to 1.1.1.12 external/public-domain/tz/dist/calendars: up to 1.1.1.1 external/public-domain/tz/dist/checklinks.awk: up to 1.1.1.3 external/public-domain/tz/dist/europe: up to 1.1.1.18 external/public-domain/tz/dist/leap-seconds.list: up to 1.1.1.8 external/public-domain/tz/dist/leapseconds: up to 1.1.1.9 external/public-domain/tz/dist/leapseconds.awk: up to 1.1.1.6 external/public-domain/tz/dist/northamerica: up to 1.1.1.17 external/public-domain/tz/dist/southamerica: up to 1.1.1.12 external/public-domain/tz/dist/theory.html: up to 1.1.1.1 external/public-domain/tz/dist/version: up to 1.1.1.6 external/public-domain/tz/dist/zishrink.awk: up to 1.1.1.1 external/public-domain/tz/dist/zone.tab: up to 1.1.1.12 external/public-domain/tz/dist/zone1970.tab: up to 1.1.1.14 Update tzdata to 2017c. @ text @d108 1 a108 1 # https://web.archive.org/web/20000926032210/http://rowayton.org/rhs/hstaug45.html a111 3 # # From Paul Eggert (2017-09-23): # This was the V-J Day issue of the Clamdigger, a Rowayton, CT newsletter. d260 1 a260 1 # https://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf d349 1 a349 1 # https://docs.legis.wisconsin.gov/statutes/statutes/175.pdf d358 1 a358 1 # https://docs.legis.wisconsin.gov/2007/related/acts/3 d405 1 a405 1 # https://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm d456 1 a456 1 # 1973-11. https://escholarship.org/uc/item/8x22k30c d477 2 a478 2 # https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props # https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props d495 1 a495 1 # From Paul Eggert (2017-06-15): d498 4 a501 10 # On Friday, 1867-10-18 (Gregorian), at precisely 15:30 local time, the # Russian forts and fleet at Sitka fired salutes to mark the ceremony of # formal transfer. See the Sacramento Daily Union (1867-11-14), p 3, col 2. # https://cdnc.ucr.edu/cgi-bin/cdnc?a=d&d=SDU18671114.2.12.1 # Sitka workers did not change their calendars until Sunday, 1867-10-20, # and so celebrated two Sundays that week. See: Ahllund T (tr Hallamaa P). # From the memoirs of a Finnish workman. Alaska History. 2006 Fall;21(2):1-25. # http://alaskahistoricalsociety.org/wp-content/uploads/2016/12/Ahllund-2006-Memoirs-of-a-Finnish-Workman.pdf # Include only the time zone part of this transition, ignoring the switch # from Julian to Gregorian, since we can't represent the Julian calendar. d503 1 a503 1 # As far as we know, of the locations mentioned below only Sitka was d505 4 a508 9 # (Yakutat was colonized by the Russians in 1799, but the settlement was # destroyed in 1805 by a Yakutat-kon war party.) Many of Alaska's inhabitants # were unaware of the US acquisition of Alaska, much less of any calendar or # time change. However, the Russian-influenced part of Alaska did observe # Russian time, and it is more accurate to model this than to ignore it. # The database format requires an exact transition time; use the Russian # salute as a somewhat-arbitrary time for the formal transfer of control for # all of Alaska. Sitka's UTC offset is -9:01:13; adjust its 15:30 to the # local times of other Alaskan locations so that they change simultaneously. d561 1 a561 1 # https://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/ d564 1 a564 1 Zone America/Juneau 15:02:19 - LMT 1867 Oct 19 15:33:32 d574 1 a574 1 Zone America/Sitka 14:58:47 - LMT 1867 Oct 19 15:30 d582 1 a582 1 Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 19 15:44:55 d590 1 a590 1 Zone America/Yakutat 14:41:05 - LMT 1867 Oct 19 15:12:18 d597 1 a597 1 Zone America/Anchorage 14:00:24 - LMT 1867 Oct 19 14:31:37 d605 1 a605 1 Zone America/Nome 12:58:22 - LMT 1867 Oct 19 13:29:35 d614 1 a614 1 Zone America/Adak 12:13:22 - LMT 1867 Oct 19 12:44:35 d650 1 a650 1 # https://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf d749 1 a749 1 # https://en.wikipedia.org/wiki/Time_in_Indiana d976 1 a976 1 # https://www.gpo.gov/fdsys/pkg/FR-2000-08-17/html/00-20854.htm d1002 1 a1002 1 # https://www.gpo.gov/fdsys/pkg/FR-1999-10-21/html/99-27240.htm a1031 13 # From Paul Eggert (2017-07-26): # Although Shanks says Detroit observed DST in 1967 from 06-14 00:01 # until 10-29 00:01, I now see multiple reports that this is incorrect. # For example, according to a 50-year anniversary report about the 1967 # Detroit riots and a major-league doubleheader on 1967-07-23, "By the time # the last fly ball of the doubleheader settled into the glove of leftfielder # Lenny Green, it was after 7 p.m. Detroit did not observe daylight saving # time, so light was already starting to fail. Twilight was made even deeper # by billowing columns of smoke that ascended in an unbroken wall north of the # ballpark." See: Dow B. Detroit '67: As violence unfolded, Tigers played two # at home vs. Yankees. Detroit Free Press 2017-07-23. # https://www.freep.com/story/sports/mlb/tigers/2017/07/23/detroit-tigers-1967-riot-new-york-yankees/499951001/ # d1036 2 d1101 1 a1101 1 # . d1147 1 a1147 1 # https://archive.news.gov.bc.ca/releases/news_releases_2005-2009/2006AG0014-000330.htm d1151 1 a1151 1 # https://www.novascotia.ca/just/regulations/rg2/2006/ma1206.pdf d1155 1 a1155 1 # https://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf d1159 1 a1159 1 # https://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php d1173 1 a1173 1 # https://www.gov.yk.ca/legislation/regs/oic2006_127.pdf d1194 2 a1195 2 # https://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html # https://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5 d1232 5 a1236 7 # From Paul Eggert (2017-10-14): # Legally Labrador should observe Newfoundland time; see: # McLeod J. Labrador time - legal or not? St. John's Telegram, 2017-10-07 # http://www.thetelegram.com/news/local/labrador-time--legal-or-not-154860/ # Matthews and Vincent (1998) write that the only part of Labrador # that follows the rules is the southeast corner, including Port Hope # Simpson and Mary's Harbour, but excluding, say, Black Tickle. d1436 1 a1436 1 # https://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en a1467 5 # # From Paul Eggert (2017-07-08): # For more on Orillia, see: Daubs K. Bold attempt at daylight saving # time became a comic failure in Orillia. Toronto Star 2017-07-08. # https://www.thestar.com/news/insight/2017/07/08/bold-attempt-at-daylight-saving-time-became-a-comic-failure-in-orillia.html d1959 1 a1959 1 # [https://www.canlii.org/en/ca/laws/stat/rsc-1985-c-i-21/latest/rsc-1985-c-i-21.html] d2024 1 a2024 1 # https://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html d2039 1 a2039 1 # https://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html d2051 1 a2051 1 # https://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html d2065 1 a2065 1 # https://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html d2108 1 a2108 1 # http://www.nunatsiaqonline.ca/archives/nunavut991130/nvt91119_17.html d2126 1 a2126 1 # From d2457 1 a2457 1 # https://www.timeanddate.com/news/time/north-mexico-dst-change.html d2876 1 a2876 1 # https://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html d2923 1 a2923 1 # https://www.timeanddate.com/news/time/cuba-starts-dst-2011.html d2933 1 a2933 1 # https://www.timeanddate.com/news/time/cuba-time-changes-2011.html d2943 1 a2943 1 # https://www.timeanddate.com/news/time/cuba-starts-dst-2012.html d3138 2 a3139 2 # https://www.radiotelevisioncaraibes.com/presse/heure_d_t_pas_de_changement_d_heure_pr_vu_pour_cet_ann_e.html # https://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/ d3338 1 a3338 1 # https://bugs.debian.org/415007 a3359 12 # From the Turks & Caicos Cabinet (2017-07-20), heads-up from Steffen Thorsen: # ... agreed to the reintroduction in TCI of Daylight Saving Time (DST) # during the summer months and Standard Time, also known as Local # Time, during the winter months with effect from April 2018 ... # https://www.gov.uk/government/news/turks-and-caicos-post-cabinet-meeting-statement--3 # # From Paul Eggert (2017-08-26): # The date of effect of the spring 2018 change appears to be March 11, # which makes more sense. See: Hamilton D. Time change back # by March 2018 for TCI. Magnetic Media. 2017-08-25. # http://magneticmediatv.com/2017/08/time-change-back-by-march-2018-for-tci/ # d3365 1 a3365 2 -4:00 - AST 2018 Mar 11 3:00 -5:00 US E%sT @ 1.1.1.1.4.7.2.3 log @external/public-domain/tz/dist/ziguard.awk up to 1.1.1.1 external/public-domain/tz/dist/CONTRIBUTING up to 1.1.1.5 external/public-domain/tz/dist/Makefile up to 1.1.1.20 external/public-domain/tz/dist/NEWS up to 1.1.1.21 external/public-domain/tz/dist/README up to 1.1.1.6 external/public-domain/tz/dist/TZDATA_VERSION up to 1.11 external/public-domain/tz/dist/africa up to 1.1.1.14 external/public-domain/tz/dist/antarctica up to 1.1.1.10 external/public-domain/tz/dist/asia up to 1.1.1.19 external/public-domain/tz/dist/australasia up to 1.1.1.14 external/public-domain/tz/dist/backzone up to 1.1.1.14 external/public-domain/tz/dist/checktab.awk up to 1.1.1.9 external/public-domain/tz/dist/europe up to 1.1.1.20 external/public-domain/tz/dist/leap-seconds.list up to 1.1.1.9 external/public-domain/tz/dist/leapseconds up to 1.1.1.10 external/public-domain/tz/dist/northamerica up to 1.1.1.19 external/public-domain/tz/dist/southamerica up to 1.1.1.14 external/public-domain/tz/dist/theory.html up to 1.1.1.3 external/public-domain/tz/dist/version up to 1.1.1.8 external/public-domain/tz/dist/zishrink.awk up to 1.1.1.3 external/public-domain/tz/dist/zone.tab up to 1.1.1.14 external/public-domain/tz/dist/zone1970.tab up to 1.1.1.16 doc/3RDPARTY 1.1506 (patch) Updated tzdata to 2018d. [kre, ticket #1589] @ text @d28 1 a28 1 # From Paul Eggert (2018-03-20): d39 4 a42 3 # railroads had agreed and it took effect on 1883-11-18. That Sunday # was called the "day of two noons", as some locations observed noon # twice. Allen witnessed the transition in New York City, writing: a350 12 # From Paul Eggert (2018-01-07): # In 1869 the Chicago Astronomical Society contracted with the city to keep # time. Though delayed by the Great Fire, by 1880 a wire ran from the # Dearborn Observatory (on the University of Chicago campus) to City Hall, # which then sent signals to police and fire stations. However, railroads got # their time signals from the Allegheny Observatory, the Madison Observatory, # the Ann Arbor Observatory, etc., so their clocks did not agree with each # other or with the city's official time. The confusion took some years to # clear up. See: # Moser M. How Chicago gave America its time zones. Chicago. 2018-01-04. # http://www.chicagomag.com/city-life/January-2018/How-Chicago-Gave-America-Its-Time-Zones/ d415 2 a416 1 # at 47° 15' 51" N, 101° 46' 40" W, which yields an offset of 6h47'07". d449 1 a449 1 # Nevada (except West Wendover), Oregon (except the northern ¾ of a946 7 # From Paul Eggert (2018-03-20): # The Louisville & Nashville Railroad's 1883-11-18 change occurred at # 10:00 old local time; train were supposed to come to a standstill # for precisely 18 minutes. See Bartky Fig. 1 (page 50). It is not # clear how this matched civil time in Louisville, so for now continue # to assume Louisville switched at noon new local time, like New York. # d1899 1 a1899 1 # i.e. Creston has been stuck on UT-7 for 93 years. d3255 2 a3256 2 Zone America/Jamaica -5:07:10 - LMT 1890 # Kingston -5:07:10 - KMT 1912 Feb # Kingston Mean Time d3406 1 a3406 1 -5:07:10 - KMT 1912 Feb # Kingston Mean Time @ 1.1.1.1.4.7.2.4 log @Sync external/public-domain/tz/dist to current, requested by kre in ticket #1644: external/public-domain/tz/dist/CONTRIBUTING up to 1.1.1.6 external/public-domain/tz/dist/Makefile up to 1.1.1.22 external/public-domain/tz/dist/NEWS up to 1.1.1.24 external/public-domain/tz/dist/README up to 1.1.1.7 external/public-domain/tz/dist/TZDATA_VERSION up to 1.14 external/public-domain/tz/dist/africa up to 1.1.1.17 external/public-domain/tz/dist/antarctica up to 1.1.1.11 external/public-domain/tz/dist/asia up to 1.1.1.21 external/public-domain/tz/dist/australasia up to 1.1.1.16 external/public-domain/tz/dist/backward up to 1.1.1.9 external/public-domain/tz/dist/backzone up to 1.1.1.15 external/public-domain/tz/dist/etcetera up to 1.1.1.3 external/public-domain/tz/dist/europe up to 1.1.1.23 external/public-domain/tz/dist/factory up to 1.1.1.3 external/public-domain/tz/dist/leap-seconds.list up to 1.1.1.10 external/public-domain/tz/dist/leapseconds up to 1.1.1.11 external/public-domain/tz/dist/leapseconds.awk up to 1.1.1.7 external/public-domain/tz/dist/northamerica up to 1.1.1.21 external/public-domain/tz/dist/pacificnew up to 1.1.1.2 external/public-domain/tz/dist/southamerica up to 1.1.1.15 external/public-domain/tz/dist/systemv up to 1.1.1.2 external/public-domain/tz/dist/theory.html up to 1.1.1.6 external/public-domain/tz/dist/version up to 1.1.1.11 external/public-domain/tz/dist/yearistype.sh up to 1.1.1.2 external/public-domain/tz/dist/ziguard.awk up to 1.1.1.3 external/public-domain/tz/dist/zishrink.awk up to 1.1.1.5 external/public-domain/tz/dist/zone.tab up to 1.1.1.15 external/public-domain/tz/dist/zone1970.tab up to 1.1.1.17 external/public-domain/tz/dist/zoneinfo2tdf.pl up to 1.1.1.2 doc/3RDPARTY (apply patch) Import tzdata2018f from ftp://ftp.iana.org/tz/releases/tzdata2018f.tar.gz Volgograd moves from +03 to +04 on 2018-10-28. Fiji ends DST 2019-01-13, not 2019-01-20. Most of Chile changes DST dates, effective 2019-04-06. Plus corrections to North Korea's 2018-05-05 and China's April 1988 updates (getting the actual time/date of the transition correct) Corrections for Macau pre 1992, Japan in late 1940's - early 1950's, and China (Shanghai) 1940's. The Phillipines get their timezone name abbreviations back. - Import tzdata2018g from ftp://ftp.iana.org/tz/releases/tzdata2018g.tar.gz Summary of changes in tzdata2018g (2018-10-26 22:22:45 -0700): Morocco switches to permanent +01 on 2018-10-27. @ text @a0 2 # tzdb data for North and Central America and environs d51 1 a51 1 # https://dx.doi.org/10.2307/3105430 a439 13 # From Paul Eggert (2018-10-25): # On 1921-03-04 federal law placed all of Texas into the central time zone. # However, El Paso ignored the law for decades and continued to observe # mountain time, on the grounds that that's what they had always done # and they weren't about to let the federal government tell them what to do. # Eventually the federal government gave in and changed the law on # 1970-04-10 to match what El Paso was actually doing. Although # that's slightly after our 1970 cutoff, there is no need to create a # separate zone for El Paso since they were ignoring the law anyway. See: # Long T. El Pasoans were time rebels, fought to stay in Mountain zone. # El Paso Times. 2018-10-24 06:40 -06. # https://www.elpasotimes.com/story/news/local/el-paso/2018/10/24/el-pasoans-were-time-rebels-fought-stay-mountain-zone/1744509002/ # d709 3 a711 1 -10:30 US H%sT 1947 Jun 8 2:00 @ 1.1.1.1.4.7.2.5 log @Pull up the following, requested by kre in ticket #1670: external/public-domain/tz/dist/Makefile up to 1.1.1.23 external/public-domain/tz/dist/NEWS up to 1.1.1.26 external/public-domain/tz/dist/TZDATA_VERSION up to 1.16 external/public-domain/tz/dist/africa up to 1.1.1.19 external/public-domain/tz/dist/asia up to 1.1.1.22 external/public-domain/tz/dist/australasia up to 1.1.1.17 external/public-domain/tz/dist/leapseconds up to 1.1.1.12 external/public-domain/tz/dist/leapseconds.awk up to 1.1.1.8 external/public-domain/tz/dist/northamerica up to 1.1.1.22 external/public-domain/tz/dist/theory.html up to 1.1.1.7 external/public-domain/tz/dist/version up to 1.1.1.13 external/public-domain/tz/dist/ziguard.awk up to 1.1.1.4 external/public-domain/tz/dist/zone.tab up to 1.1.1.16 external/public-domain/tz/dist/zone1970.tab up to 1.1.1.18 distrib/sets/lists/base/mi (patch) doc/3RDPARTY (patch) Import tzdata2018h from ftp://ftp.iana.org/tz/releases/tzdata2018h.tar.gz Summary of changes in tzdata2018h (2018-12-23 17:59:32 -0800): Qyzylorda (aka Kyzylorda) oblast in Kazakhstan moved from +06 to +05 on 2018-12-21. This is a zone split as Qostanay (aka Kostanay) did not switch, so create a zone Asia/Qostanay. Metlakatla, Alaska observes PST this winter only. Add predictions for Iran from 2038 through 2090. Changes to some old timestamps for Nauru (1979) Guam (1959-77), Hong Kong (1904, 1941, 1945, 1952) (others in Pacific during WWII) --- Merge tzdata2018h --- Update to tzdata2018h (new zone Asia/Qostanay) --- Import tzdata2018i from ftp://ftp.iana.org/tz/releases/tzdata2018i.tar.gz Summary of changes in tzdata2018i (2018-12-30 11:05:43 -0800): Due to a change in government, Sao Tome and Principe switches back from +01 to +00 on 2019-01-01 at 02:00. --- Merge tzdata2018i --- Update to tzdata2018i @ text @a601 11 # From Ryan Stanley (2018-11-06): # The Metlakatla community in Alaska has decided not to change its # clock back an hour starting on November 4th, 2018 (day before yesterday). # They will be gmtoff=-28800 year-round. # https://www.facebook.com/141055983004923/photos/pb.141055983004923.-2207520000.1541465673./569081370202380/ # From Paul Eggert (2018-12-16): # In a 2018-12-11 special election, Metlakatla voted to go back to # Alaska time (including daylight saving time) starting next year. # https://www.krbd.org/2018/12/12/metlakatla-to-follow-alaska-standard-time-allow-liquor-sales/ a627 2 -9:00 US AK%sT 2018 Nov 4 2:00 -8:00 - PST 2019 Mar Sun>=8 3:00 a787 16 # From Paul Eggert (2018-11-30): # A brief but entertaining history of time in Indiana describes a 1949 debate # in the Indiana House where city legislators (who favored "fast time") # tussled with farm legislators (who didn't) over a bill to outlaw DST: # "Lacking enough votes, the city faction tries to filibuster until time runs # out on the session at midnight, but rural champion Rep. Herbert Copeland, # R-Madison, leans over the gallery railing and forces the official clock # back to 9 p.m., breaking it in the process. The clock sticks on 9 as the # debate rages on into the night. The filibuster finally dies out and the # bill passes, while outside the chamber, clocks read 3:30 a.m. In the end, # it doesn't matter which side won. The law has no enforcement powers and # is simply ignored by fast-time communities." # How Indiana went from 'God's time' to split zones and daylight-saving. # Indianapolis Star. 2018-11-27 14:58 -05. # https://www.indystar.com/story/news/politics/2018/11/27/indianapolis-indiana-time-zone-history-central-eastern-daylight-savings-time/2126300002/ # @ 1.1.1.2 log @Import tzdata2014g from ftp://ftp.iana.org/tz/releases/tzdata2014g.tar.gz Summary of changes in tzdata2014g (2014-08-28 12:31:23 -0700): * Turks & Caicos is switching from US eastern time to UTC-4 year-round, modeled as a switch from EST/EDT to AST on 2014-11-02 at 02:00. * Time in Russia or the USSR before 1926 or so has been corrected by a few seconds for several zones, and a few minutes for Asia/Yekaterinburg. * The Portuguese decree of 1911-05-26 took effect on 1912-01-01, not on the date of the decree. This affects 1911 time stamps in Africa/Bissau, Africa/Luanda, Atlantic/Azores, and Atlantic/Madeira. * Lisbon's pre-1912 GMT offset was -0:36:45 (rounded from -0:36:44.68), not -0:36:32. * Asia/Dhaka ended DST on 2009-12-31 at 24:00, not 23:59. * A new file 'backzone' contains data which may appeal to connoisseurs of old time stamps, although it is out of scope for the tz database, is often poorly sourced, and contains some data that is known to be incorrect. * Some more zones have been turned into links, when they differed from existing zones only for older time stamps. As usual, these changes affect UTC offsets in pre-1970 time stamps only. Their old contents have been moved to the 'backzone' file. * Changes affecting documentation and commentary. @ text @d6 1 a6 1 # This file is by no means authoritative; if you think you know better, d8 1 a8 2 # tz@@iana.org for general use in the future). For more, please see # the file CONTRIBUTING in the tz distribution. d62 2 a63 2 # (Carnegie Library of Pittsburgh, 1927). # http://www.clpgh.org/exhibit/dst.html d82 2 a83 2 # An AltaVista search turned up: # http://rowayton.org/rhs/hstaug45.html d271 1 a271 1 # http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1 d326 2 a327 2 -6:00 Chicago C%sT 1936 Mar 1 2:00 -5:00 - EST 1936 Nov 15 2:00 d334 1 a334 1 -7:00 US M%sT 1992 Oct 25 2:00 d343 2 a344 2 Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 -7:00 US M%sT 2003 Oct 26 2:00 d361 2 a362 2 Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53 -7:00 US M%sT 2010 Nov 7 2:00 d478 3 a480 3 -8:00 US P%sT 1980 Apr 27 2:00 -9:00 US Y%sT 1980 Oct 26 2:00 -8:00 US P%sT 1983 Oct 30 2:00 d488 1 a488 1 -8:00 US P%sT 1983 Oct 30 2:00 d496 1 a496 1 -8:00 US P%sT 1983 Oct 30 2:00 d512 1 a512 1 -10:00 US AH%sT 1983 Oct 30 2:00 d521 1 a521 1 -11:00 US B%sT 1983 Oct 30 2:00 d530 1 a530 1 -11:00 US B%sT 1983 Oct 30 2:00 d548 1 a548 1 # made by William Robinson and seconded by Henry Swanson: Be it d581 1 a581 1 # Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is d591 6 a596 7 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 -10:30 - HST 1933 Apr 30 2:00 -10:30 1:00 HDT 1933 May 21 12:00 -10:30 - HST 1942 Feb 9 2:00 -10:30 1:00 HDT 1945 Sep 30 2:00 -10:30 - HST 1947 Jun 8 2:00 d598 1 a623 1 # Zone NAME GMTOFF RULES FORMAT [UNTIL] d625 3 a627 3 -7:00 US M%sT 1944 Jan 1 0:01 -7:00 - MST 1944 Apr 1 0:01 -7:00 US M%sT 1944 Oct 1 0:01 d651 1 a651 1 -8:00 US P%sT 1923 May 13 2:00 d653 1 a653 1 -7:00 - MST 1974 Feb 3 2:00 d659 2 a660 1 # http://en.wikipedia.org/wiki/Time_in_Indiana d686 3 d710 1 a710 1 Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 d714 3 a716 3 -6:00 Indianapolis C%sT 1955 Apr 24 2:00 -5:00 - EST 1957 Sep 29 2:00 -6:00 - CST 1958 Apr 27 2:00 d732 1 a732 1 -6:00 Marengo C%sT 1961 Apr 30 2:00 d734 2 a735 2 -5:00 US E%sT 1974 Jan 6 2:00 -6:00 1:00 CDT 1974 Oct 27 2:00 d756 1 a756 1 -6:00 Vincennes C%sT 1964 Apr 26 2:00 d759 2 a760 2 -5:00 - EST 2006 Apr 2 2:00 -6:00 US C%sT 2007 Nov 4 2:00 d777 1 a777 1 -6:00 Perry C%sT 1964 Apr 26 2:00 d780 1 a780 1 -5:00 - EST 2006 Apr 2 2:00 d793 5 a797 5 -6:00 Pike C%sT 1965 Apr 25 2:00 -5:00 - EST 1966 Oct 30 2:00 -6:00 US C%sT 1977 Oct 30 2:00 -5:00 - EST 2006 Apr 2 2:00 -6:00 US C%sT 2007 Nov 4 2:00 d815 4 a818 4 -6:00 Starke C%sT 1962 Apr 29 2:00 -5:00 - EST 1963 Oct 27 2:00 -6:00 US C%sT 1991 Oct 27 2:00 -5:00 - EST 2006 Apr 2 2:00 d831 1 a831 1 -6:00 Pulaski C%sT 1961 Apr 30 2:00 d834 2 a835 2 -5:00 - EST 2006 Apr 2 2:00 -6:00 US C%sT 2007 Mar 11 2:00 d841 1 a841 1 -6:00 US C%sT 1954 Apr 25 2:00 d862 1 a862 1 -6:00 Louisville C%sT 1961 Jul 23 2:00 d864 2 a865 2 -5:00 US E%sT 1974 Jan 6 2:00 -6:00 1:00 CDT 1974 Oct 27 2:00 d871 1 a871 1 # http://www.lake-cumberland.com/life/archive/news990129time.shtml d890 1 a890 1 # http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22 d916 1 a916 1 # http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15 d954 1 a954 1 -6:00 - CST 1915 May 15 2:00 d959 1 a959 1 -5:00 - EST 1975 Apr 27 2:00 d972 2 a973 2 -6:00 Menominee C%sT 1969 Apr 27 2:00 -5:00 - EST 1973 Apr 29 2:00 d1053 1 a1053 1 # Unless otherwise specified, the data entries for Canada are all from Shanks d1103 1 a1103 1 # http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp d1109 1 a1109 1 # http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php d1223 1 a1223 1 -3:30 StJohns N%sT 1966 Mar 15 2:00 d1284 1 a1284 1 -4:00 Halifax A%sT 1942 Feb 9 2:00s d1364 12 a1375 4 Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D Rule Mont 1927 1937 - Sep lastSat 24:00 0 S Rule Mont 1938 1940 - Apr lastSun 0:00 1:00 D Rule Mont 1938 1939 - Sep lastSun 0:00 0 S d1389 1 a1389 1 -5:00 Mont E%sT 1942 Feb 9 2:00s d1422 1 a1422 1 # http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html d1512 1 a1512 1 # Province Daylight saving time used d1517 12 a1528 12 # Montreal Lachine # Quebec Mont-Royal # Lévis Iberville # St. Lambert Cap de la Madelèine # Verdun Loretteville # Westmount Richmond # Outremont St. Jérôme # Longueuil Greenfield Park # Arvida Waterloo # Chambly-Canton Beaulieu # Melbourne La Tuque # St. Théophile Buckingham d1530 2 a1531 2 # the southerly part of the province. Not # used in the northwesterly part. d1600 1 a1600 1 -5:00 Toronto E%sT 1942 Feb 9 2:00s d1613 1 a1613 1 -5:00 1:00 EDT 1942 Feb 9 2:00s d1617 1 a1617 1 -6:00 1:00 CDT 1942 Feb 9 2:00s d1621 2 a1622 2 -6:00 1:00 CDT 1942 Feb 9 2:00s -6:00 Canada C%sT 1945 Sep 30 2:00 d1758 1 a1758 1 -7:00 Regina M%sT 1960 Apr lastSun 2:00 d1761 1 a1761 1 -7:00 Canada M%sT 1946 Apr lastSun 2:00 d1763 1 a1763 1 -7:00 Swift M%sT 1972 Apr lastSun 2:00 d1821 3 a1823 3 # as plausible as any other date (in June). She also said that after writing # the article she had discovered another time change in 1916; this is the # subject of another article which she wrote in October 2010. d1830 1 a1830 1 # Exact date in October unknown; Sunday October 1 is a reasonable guess. d1870 1 a1870 1 -8:00 Vanc P%sT 1972 Aug 30 2:00 d1898 1 a1898 1 # http://www.nunatsiaq.com/nunavut/nvt90903_13.html d1906 1 a1906 1 # http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html d1935 2 a1936 2 # Nunatsiaq News (1999-11-19): # http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html d2084 3 a2086 3 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 -5:00 Canada E%sT 1999 Oct 31 2:00 -6:00 Canada C%sT 2000 Oct 29 2:00 d2090 2 a2091 2 -5:00 NT_YK E%sT 1999 Oct 31 2:00 -6:00 Canada C%sT 2000 Oct 29 2:00 d2095 4 a2098 4 -6:00 NT_YK C%sT 2000 Oct 29 2:00 -5:00 - EST 2001 Apr 1 3:00 -6:00 Canada C%sT 2006 Oct 29 2:00 -5:00 - EST 2007 Mar 11 3:00 d2102 2 a2103 2 -6:00 NT_YK C%sT 2000 Oct 29 2:00 -5:00 - EST 2001 Apr 1 3:00 d2107 4 a2110 4 -7:00 NT_YK M%sT 1999 Oct 31 2:00 -6:00 Canada C%sT 2000 Oct 29 2:00 -5:00 - EST 2000 Nov 5 0:00 -6:00 - CST 2001 Apr 1 3:00 d2116 1 a2116 1 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 d2120 1 a2120 1 -9:00 NT_YK Y%sT 1966 Jul 1 2:00 d2124 1 a2124 1 -9:00 NT_YK Y%sT 1973 Oct 28 0:00 d2137 1 a2137 1 # http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/ d2182 2 a2183 2 # "Diario Oficial: Time Zone Changeover" (1996-01-04). # http://mexico-travel.com/extra/timezone_eng.html d2208 1 a2208 1 # http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001 d2222 1 a2222 1 # http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre d2228 1 a2228 1 # http://www.latimes.com/news/nation/20010303/t000018766.html d2344 1 a2344 1 Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 d2350 1 a2350 1 -6:00 Mexico C%sT 2001 Sep 30 2:00 d2354 1 a2354 1 Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 d2362 1 a2362 1 -6:00 - CST 1998 Apr Sun>=1 3:00 d2374 1 a2374 1 -6:00 - CST 1998 Apr Sun>=1 3:00 d2438 1 a2438 1 -7:00 Mexico M%sT 2010 Apr 4 2:00 d2534 2 a2535 2 Zone America/Barbados -3:58:29 - LMT 1924 # Bridgetown -3:58:29 - BMT 1932 # Bridgetown Mean Time d2565 2 a2566 2 Zone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton -4:00 - AST 1974 Apr 28 2:00 d2572 2 a2573 2 Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown -5:07:11 - KMT 1912 Feb # Kingston Mean Time d2590 1 a2590 1 Zone America/Costa_Rica -5:36:13 - LMT 1890 # San José d2834 2 a2835 2 -4:00 - AST 2000 Oct 29 2:00 -5:00 US E%sT 2000 Dec 3 1:00 d2846 1 a2846 1 Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador d2867 1 a2867 1 # http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf d2970 2 a2971 2 # Also see Diario El Heraldo, The country returns to standard time (2006-08-08). # http://www.elheraldo.hn/nota.php?nid=54941&sec=12 d2999 1 a2999 1 Zone America/Jamaica -5:07:11 - LMT 1890 # Kingston d3001 1 a3001 1 -5:00 - EST 1974 Apr 28 2:00 d3007 2 a3008 2 Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France -4:04:20 - FFMT 1911 May # Fort-de-France MT d3037 1 a3037 1 # and elsewhere, says (fifth paragraph, translated from Spanish): "The last d3075 1 a3075 1 -6:00 Nic C%sT 1992 Jan 1 4:00 d3084 1 a3084 1 -5:19:36 - CMT 1908 Apr 22 # Colón Mean Time d3090 1 a3090 1 Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan d3102 1 a3102 1 Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre d3113 1 a3113 1 # http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007 d3126 3 a3128 4 # From Paul Eggert (2014-08-19): # The 2014-08-13 Cabinet meeting decided to stay on UTC-4 year-round. See: # http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm # Model this as a switch from EST/EDT to AST on 2014-11-02 at 02:00. d3130 6 d3138 2 a3139 4 -5:07:11 - KMT 1912 Feb # Kingston Mean Time -5:00 - EST 1979 -5:00 US E%sT 2014 Nov 2 2:00 -4:00 - AST @ 1.1.1.3 log @Import tzdata2014h from ftp://ftp.iana.org/tz/releases/tzdata2014h.tar.gz Summary of changes in tzdata2014h (2014-09-25 18:59:03 -0700): * America/Jamaica's 1974 spring-forward transition was Jan. 6, not Apr. 28. * Shanks says Asia/Novokuznetsk switched from LMT (not "NMT") on 1924-05-01, not 1920-01-06. * Some more zones have been turned into links, when they differed from existing zones only for older time stamps. As usual, these changes affect UTC offsets in pre-1970 time stamps only. Their old contents have been moved to the 'backzone' file. The affected zones are: Africa/Blantyre, Africa/Bujumbura, Africa/Gaborone, Africa/Harare, Africa/Kigali, Africa/Lubumbashi, Africa/Lusaka, Africa/Maseru, and Africa/Mbabane. * Changes affecting documentation and commentary. @ text @a279 6 # From Paul Eggert (2014-09-06): # Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208 # says that New York City Hall time was 3 minutes 58.4 seconds fast of # Eastern time (i.e., -4:56:01.6) just before the 1883 switch. Round to the # nearest second. a2987 11 # # Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but # Lance Neita writes that Prime Minister Michael Manley decreed it January 5. # Assume Neita meant Jan 6 02:00, the same as the US. Neita also writes that # Manley's supporters associated this act with Manley's nickname "Joshua" # (recall that in the Bible the sun stood still at Joshua's request), # and with the Rod of Correction which Manley said he had received from # Haile Selassie, Emperor of Ethiopia. See: # Neita L. The politician in all of us. Jamaica Observer 2014-09-20 # http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647 # d2991 1 a2991 1 -5:00 - EST 1974 @ 1.1.1.4 log @Import tzdata2014i from ftp://ftp.iana.org/tz/releases/tzdata2014i.tar.gz Summary of changes in tzdata2014i (2014-10-21 22:04:57 -0700): * Pacific/Fiji will observe DST from 2014-11-02 02:00 to 2015-01-18 03:00. Guess that future years will use a similar pattern. * A new Zone Pacific/Bougainville, for the part of Papua New Guinea that plans to switch from UTC+10 to UTC+11 on 2014-12-28 at 02:00. * Since Belarus is not changing its clocks even though Moscow is, the time zone abbreviation in Europe/Minsk is changing from FET to its more-traditional value MSK on 2014-10-26 at 01:00. * The new abbreviation IDT stands for the pre-1976 use of UT+8 in Indochina, to distinguish it better from ICT (UT+7). * Many time stamps have been corrected for Asia/Ho_Chi_Minh before 1976. Asia/Ho_Chi_Minh has been added to zone1970.tab, since north and south Vietnam disagreed after our 1970 cutoff. * Asia/Phnom_Penh and Asia/Vientiane have been turned into links, as they differed from existing zones only for pre-1970 time stamps. * Changes affecting commentary. @ text @d1104 1 a1104 1 # From Paul Eggert (2014-10-18): d1107 1 a1107 1 # http://www.canadiangeographic.ca/Magazine/SO98/alacarte.asp d1111 4 a1114 3 # National Research Council Canada maintains info about time zones and DST. # http://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html # http://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5 d1979 4 a1982 1 # According to ... d1991 1 a1991 1 # From Paul Eggert (2014-10-17): d1993 1 a1993 3 # daylight saving only during wartime. Gwillim Law's email also # mentioned maps now maintained by National Research Council Canada; # see above for an up-to-date link. @ 1.1.1.5 log @Import tzdata2014j from ftp://ftp.iana.org/tz/releases/tzdata2014j.tar.gz Summary of changes in tzdata2014j (2014-11-10 17:37:11 -0800): * Turks & Caicos' switch from US eastern time to UTC-4 year-round did not occur on 2014-11-02 at 02:00. * Many pre-1989 time stamps have been corrected for Asia/Seoul and Asia/Pyongyang, based on sources for the Korean-language Wikipedia entry for time in Korea. * Some more zones have been turned into links, when they differed from existing zones only for older (pre-1970) time stamps. * Changes affecting commentary. Summary of changes in tzdata2014i (2014-10-21 22:04:57 -0700): * Pacific/Fiji will observe DST from 2014-11-02 02:00 to 2015-01-18 03:00. * A new Zone Pacific/Bougainville, for the part of Papua New Guinea that plans to switch from UTC+10 to UTC+11 on 2014-12-28 at 02:00. * Since Belarus is not changing its clocks even though Moscow is, the time zone abbreviation in Europe/Minsk is changing from FET to its more-traditional value MSK on 2014-10-26 at 01:00. * The new abbreviation IDT stands for the pre-1976 use of UT+8 in Indochina, to distinguish it better from ICT (UT+7). * Many time stamps have been corrected for Asia/Ho_Chi_Minh before 1976. Asia/Ho_Chi_Minh has been added to zone1970.tab, to give tzselect users in Vietnam two choices, since north and south Vietnam disagreed after our 1970 cutoff. * Asia/Phnom_Penh and Asia/Vientiane have been turned into links, as they differed from existing zones only for older (pre-1970) time stamps. * Changes affecting commentary. @ text @d994 2 a995 3 # From Paul Eggert (2014-10-31): # # Unless otherwise specified, the source for data through 1990 is: a997 1 # Unfortunately this book contains many errors and cites no sources. d1003 4 a1006 2 # of the IATA's data after 1990. Except where otherwise noted, # IATA SSIM is the source for entries after 1990. d3134 1 a3134 5 # Model this as a switch from EST/EDT to AST ... # From Chris Walton (2014-11-04): # ... the TCI government appears to have delayed the switch to # "permanent daylight saving time" by one year.... # http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm d3140 1 a3140 1 -5:00 US E%sT 2015 Nov Sun>=1 2:00 @ 1.1.1.6 log @Import tzdata2015a from ftp://ftp.iana.org/tz/releases/tzdata2015a.tar.gz Summary of changes in tzdata2015a (2015-01-29 22:35:20 -0800): * The Mexican state of Quintana Roo, represented by America/Cancun, will shift from Central Time with DST to Eastern Time without DST on 2015-02-01 at 02:00. * Chile will not change clocks in April or thereafter; its new standard time will be its old daylight saving time. This affects America/Santiago, Pacific/Easter, and Antarctica/Palmer. (Thanks to Juan Correa.) * New leap second 2015-06-30 23:59:60 UTC as per IERS Bulletin C 49. * Iceland observed DST in 1919 and 1921, and its 1939 fallback transition was Oct. * Some more zones have been turned into links, when they differed from existing zones only for older time stamps. * Changes affecting commentary. @ text @d127 1 a127 1 Rule US 1945 only - Sep lastSun 2:00 0 S d2127 1 a2127 1 # From Paul Eggert (2014-12-07): d2131 1 a2131 1 # http://www.diputados.gob.mx/bibliot/publica/inveyana/polisoc/horver/index.htm a2299 18 # From Steffen Thorsen (2014-12-08), translated by Gwillim Law: # The Mexican state of Quintana Roo will likely change to EST in 2015. # # http://www.unioncancun.mx/articulo/2014/12/04/medio-ambiente/congreso-aprueba-una-hora-mas-de-sol-en-qroo # "With this change, the time conflict that has existed between the municipios # of Quintana Roo and the municipio of Felipe Carrillo Puerto may come to an # end. The latter declared itself in rebellion 15 years ago when a time change # was initiated in Mexico, and since then it has refused to change its time # zone along with the rest of the country." # # From Steffen Thorsen (2015-01-14), translated by Gwillim Law: # http://sipse.com/novedades/confirman-aplicacion-de-nueva-zona-horaria-para-quintana-roo-132331.html # "...the new time zone will come into effect at two o'clock on the first Sunday # of February, when we will have to advance the clock one hour from its current # time..." # # Also, the new zone will not use DST. d2320 1 a2320 2 -6:00 Mexico C%sT 2015 Feb 1 2:00 -5:00 - EST @ 1.1.1.7 log @Import tzdata2015b from ftp://ftp.iana.org/tz/releases/tzdata2015b.tar.gz Summary of changes in tzdata2015b (2015-03-19 23:28:11 -0700): * Mongolia will start observing DST again in 2015, from the last Saturday in March at 02:00 to the last Saturday in September at 00:00. * Palestine will start DST on March 28, not March 27, in 2015. * The 1982 zone shift in Pacific/Easter has been corrected, fixing a 2015a regression. * Some more zones have been turned into links, when they differed from existing zones only for older time stamps. * Correct the 1992-2010 DST abbreviation in Volgograd from "MSK" to "MSD". * Changes affecting commentary. @ text @d2315 1 a2316 17 # # From Carlos Raúl Perasso (2015-02-02): # The decree that modifies the Mexican Hour System Law has finally # been published at the Diario Oficial de la Federación # http://www.dof.gob.mx/nota_detalle.php?codigo=5380123&fecha=31/01/2015 # It establishes 5 zones for Mexico: # 1- Zona Centro (Central Zone): Corresponds to longitude 90 W, # includes most of Mexico, excluding what's mentioned below. # 2- Zona Pacífico (Pacific Zone): Longitude 105 W, includes the # states of Baja California Sur; Chihuahua; Nayarit (excluding Bahía # de Banderas which lies in Central Zone); Sinaloa and Sonora. # 3- Zona Noroeste (Northwest Zone): Longitude 120 W, includes the # state of Baja California. # 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state # of Quintana Roo. # 5- The islands, reefs and keys shall take their timezone from the # longitude they are located at. d2511 2 d2514 4 a2517 1 # See America/Port_of_Spain. d2584 4 a2587 1 # See America/Panama. a3109 1 Link America/Panama America/Cayman @ 1.1.1.8 log @Import tzdata2015e from http://www.iana.org/time-zones/repository/releases/tzdata2015e.tar.gz Summary of changes in tzdata2015e (2015-06-13 10:56:02 -0700): * Morocco will suspend DST from 2015-06-14 03:00 through 2015-07-19 02:00, not 06-13 and 07-18 as we had guessed. * Assume Cayman Islands will observe DST starting next year, using US rules. * The file 'iso3166.tab' now uses UTF-8, so that its entries can better spell the names of Åland Islands, Côte d'Ivoire, and Réunion. Summary of changes in tzdata2015d (2015-04-24 08:09:46 -0700): * Egypt will not observe DST in 2015 and will consider canceling it permanently. For now, assume no DST indefinitely. * America/Whitehorse switched from UTC-9 to UTC-8 on 1967-05-28, not 1966-07-01. * The abbreviations for Hawaii-Aleutian standard and daylight times have been changed from HAST/HADT to HST/HDT, as per US Government Printing Office style. Summary of changes in tzdata2015c (2015-04-11 08:55:55 -0700): * Egypt's spring-forward transition is at 24:00 on April's last Thursday, not 00:00 on April's last Friday. This affects 2015, 2026, 2037, 2043, etc. * Changes to pre-1991 Chile-related time stamps in America/Santiago, Antarctica/Palmer, and Pacific/Easter. * The America/Montreal zone has been turned into a link, as it differed from an existing zone only for pre-1970 time stamps. @ text @d230 3 a232 8 # Public law 106-564 (2000-12-23) introduced ... "Chamorro Standard Time" # for time in Guam and the Northern Marianas. See the file "australasia". # # From Paul Eggert (2015-04-17): # HST and HDT are standardized abbreviations for Hawaii-Aleutian # standard and daylight times. See section 9.47 (p 234) of the # U.S. Government Printing Office Style Manual (2008) # http://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf d539 1 a539 1 -10:00 US H%sT d1334 8 a1341 3 # From Paul Eggert (2015-03-24): # See America/Toronto for most of Quebec, including Montreal. # d1355 22 d1381 7 d1878 1 a1878 1 # c. 7 defines Yukon standard time as UTC-9.... a1879 1 # [http://canlii.ca/t/7vhg] d1883 6 a1888 103 # From Brian Inglis (2015-04-14): # # I tried to trace the history of Yukon time and found the following # regulations, giving the reference title and URL if found, regulation name, # and relevant quote if available. Each regulation specifically revokes its # predecessor. The final reference is to the current Interpretation Act # authorizing and resulting from these regulatory changes. # # Only recent regulations were retrievable via Yukon government site search or # index, and only some via Canadian legal sources. Other sources used include # articles titled "Standard Time and Time Zones in Canada" from JRASC via ADS # Abstracts, cited by ADO for 1932 ..., and updated versions from 1958 and # 1970 quoted below; each article includes current extracts from provincial # and territorial ST and DST regulations at the end, summaries and details of # standard times and daylight saving time at many locations across Canada, # with time zone maps, tables and calculations for Canadian Sunrise, Sunset, # and LMST; they also cover many countries and global locations, with a chart # and table showing current Universal Time offsets, and may be useful as # another source of information for 1970 and earlier. # # * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26, # pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS) # http://adsabs.harvard.edu/abs/1932JRASC..26...49S from p.75: # Yukon Interpretation Ordinance # Yukon standard time is the local mean time at the one hundred and # thirty-fifth meridian. # # * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.; # JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System # (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1: # Yukon Interpretation Ordinance, 1955, Chap. 16. # # (1) Subject to this section, standard time shall be reckoned as nine # hours behind Greenwich Time and called Yukon Standard Time. # # (2) Notwithstanding subsection (1), the Commissioner may make regulations # varying the manner of reckoning standard time. # # * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance # http://? - no online source found # # * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC, # Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS) # http://adsabs.harvard.edu/abs/1970JRASC..64..129T from p.156: Yukon # Territory Commissioner's Order 1967-59 Interpretation Ordinance ... # # 1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon # Territory on 27th January, 1966, is hereby revoked. # # 2. Yukon (East) Standard Time as defined by section 36 of the # Interpretation Ordinance from and after mid-night on the 28th day of May, # 1967 shall be reckoned in the same manner as Pacific Standard Time, that # is to say, eight hours behind Greenwich Time in the area of the Yukon # Territory lying east of the 138th degree longitude west. # # 3. In the remainder of the Territory, lying west of the 138th degree # longitude west, Yukon (West) Standard Time shall be reckoned as nine # hours behind Greenwich Time. # # * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214 # http://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html # C.O. 1973/214 INTERPRETATION ACT ... # # 1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby # revoked. # # 2. Yukon Standard Time as defined by section 36 of the Interpretation # Act from and after midnight on the twenty-eighth day of October, 1973 # shall be reckoned in the same manner as Pacific Standard Time, that is # to say eight hours behind Greenwich Time. # # * O.I.C. 1980/02 INTERPRETATION ACT # http://? - no online source found # # * Yukon Daylight Saving Time, YOIC 1987/56 # http://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html # O.I.C. 1987/056 INTERPRETATION ACT ... # # In every year between # (a) two o'clock in the morning in the first Sunday in April, and # (b) two o'clock in the morning in the last Sunday in October, # Standard Time shall be reckoned as seven hours behind Greenwich Time and # called Yukon Daylight Saving Time. # ... # Dated ... 9th day of March, A.D., 1987. # # * Yukon Daylight Saving Time 2006, YOIC 2006/127 # http://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html # O.I.C. 2006/127 INTERPRETATION ACT ... # # 1. In Yukon each year the time for general purposes shall be 7 hours # behind Greenwich mean time during the period commencing at two o'clock # in the forenoon on the second Sunday of March and ending at two o'clock # in the forenoon on the first Sunday of November and shall be called # Yukon Daylight Saving Time. # # 2. Order-in-Council 1987/56 is revoked. # # 3. This order comes into force January 1, 2007. # # * Interpretation Act, RSY 2002, c 125 # http://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html d2114 1 a2114 1 -9:00 NT_YK Y%sT 1967 May 28 0:00 d2595 1 a2595 11 # From Paul Eggert (2015-05-15): # The Cayman government has decided to introduce DST in 2016, the idea being # to keep in sync with New York. The legislation hasn't passed but the change # seems quite likely. See: Meade B. Cayman 27. # http://www.cayman27.com.ky/2015/05/15/clock-ticks-toward-daylight-saving-time-in-cayman Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown -5:07:11 - KMT 1912 Feb # Kingston Mean Time -5:00 - EST 2016 -5:00 US E%sT d3118 1 @ 1.1.1.9 log @Import tzdata2015f from ftp://ftp.iana.org/tz/releases/tzdata2015f.tar.gz Summary of changes in tzdata2015f (2015-08-10 18:06:56 -0700): * North Korea switches to +0830 on 2015-08-15. * Uruguay no longer observes DST. * Moldova starts and ends DST at 00:00 UTC, not at 01:00 UTC. * The two characters '%z' in a zone format now stand for the UTC offset, e.g., '-07' for seven hours behind UTC and '+0530' for five hours and thirty minutes ahead. * Comments for America/Halifax and America/Glace_Bay have been improved. * Data entries have been simplified for Atlantic/Canary, Europe/Simferopol, Europe/Sofia, and Europe/Tallinn. * Changes affecting documentation. @ text @d1238 1 a1238 9 # From Brian Inglis (2015-07-20): # From the historical weather station records available at: # https://weatherspark.com/history/28351/1971/Sydney-Nova-Scotia-Canada # Sydney shares the same time history as Glace Bay, so was # likely to be the same across the island.... # Sydney, as the capital and most populous location, or Cape Breton, would # have been better names for the zone had we known this in 1996. # From Paul Eggert (2015-07-20): d1241 1 a1241 2 # the Cape Breton area, represented by Glace Bay, is the largest we know of # (Glace Bay was perhaps not the best name choice but no point changing now). d1799 1 a1799 1 # note 1: d1802 1 a1802 1 # note 2: d1805 1 a1805 1 # note 3: @ 1.1.1.10 log @Import tzdata2016b from ftp://ftp.iana.org/tz/releases/tzdata2016b.tar.gz Summary of changes in tzdata2016b (2016-03-12 17:30:14 -0800): * New zones Europe/Astrakhan and Europe/Ulyanovsk for Astrakhan and Ulyanovsk Oblasts, Russia, both of which will switch from +03 to +04 on 2016-03-27 at 02:00 local time. * As a trial of a new system that needs less information to be made up, the new zones use numeric time zone abbreviations like "+04" instead of invented abbreviations like "ASTT". * Haiti will not observe DST in 2016. * Palestine's spring-forward transition on 2016-03-26 is at 01:00, not 00:00. * Europe/Chisinau observed DST during 1990, and switched from +04 to +03 at 1990-05-06 02:00, instead of switching from +03 to +02. * 1991 abbreviations in Europe/Samara should be SAMT/SAMST, not KUYT/KUYST. * tzselect's diagnostics and checking, and checktab.awk's checking, have been improved. * tzcode now builds under MinGW. * tzselect now tests Julian-date TZ settings more accurately. * Comments in zone tables have been improved. * tzselect again limits its menu comments so that menus fit on a 24x80 alphanumeric display. * A new web page tz-how-to.html. * In the Theory file, the description of possible time zone abbreviations in tzdata has been cleaned up, as the old description was unclear and inconsistent. Summary of changes in tzdata2016a (2016-01-26 23:28:02 -0800): * America/Cayman will not observe daylight saving this year after all. * Asia/Chita switches from +0800 to +0900 on 2016-03-27 at 02:00. * Asia/Tehran now has DST predictions for the year 2038 and later, to be March 21 00:00 to September 21 00:00. * America/Metlakatla switched from PST all year to AKST/AKDT on 2015-11-01 at 02:00. * America/Santa_Isabel has been removed, and replaced with a backward compatibility link to America/Tijuana. * Asia/Karachi's two transition times in 2002 were off by a minute. * Changes affecting documentation and commentary. Summary of changes in tzdata2015g (2015-10-01 00:39:51 -0700): * Turkey's 2015 fall-back transition is scheduled for Nov. * Norfolk moves from +1130 to +1100 on 2015-10-04 at 02:00 local time. * Fiji's 2016 fall-back transition is scheduled for January 17, not 24. * Fort Nelson, British Columbia will not fall back on 2015-11-01. * Norfolk observed DST from 1974-10-27 02:00 to 1975-03-02 02:00. * Changes affecting documentation. @ text @a327 10 # From an email administrator of the City of Fort Pierre, SD (2015-12-21): # Fort Pierre is technically located in the Mountain time zone as is # the rest of Stanley County. Most of Stanley County and Fort Pierre # uses the Central time zone due to doing most of their business in # Pierre so it simplifies schedules. I have lived in Stanley County # all my life and it has been that way since I can remember. (43 years!) # # From Paul Eggert (2015-12-25): # Assume this practice predates 1970, so Fort Pierre can use America/Chicago. a483 6 # From Steffen Thorsen (2015-11-09): # It seems Metlakatla did go off PST on Sunday, November 1, changing # their time to AKST and are going to follow Alaska's DST, switching # between AKST and AKDT from now on.... # http://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/ d509 1 a509 2 -8:00 - PST 2015 Nov 1 2:00 -9:00 US AK%sT a1828 16 # From Matt Johnson (2015-09-21): # Fort Nelson, BC, Canada will cancel DST this year. So while previously they # were aligned with America/Vancouver, they're now aligned with # America/Dawson_Creek. # http://www.northernrockies.ca/EN/meta/news/archives/2015/northern-rockies-time-change.html # # From Tim Parenti (2015-09-23): # This requires a new zone for the Northern Rockies Regional Municipality, # America/Fort_Nelson. The resolution of 2014-12-08 was reached following a # 2014-11-15 poll with nearly 75% support. Effectively, the municipality has # been on MST (-0700) like Dawson Creek since it advanced its clocks on # 2015-03-08. # # From Paul Eggert (2015-09-23): # Shanks says Fort Nelson did not observe DST in 1946, unlike Vancouver. a1846 6 Zone America/Fort_Nelson -8:10:47 - LMT 1884 -8:00 Vanc P%sT 1946 -8:00 - PST 1947 -8:00 Vanc P%sT 1987 -8:00 Canada P%sT 2015 Mar 8 2:00 -7:00 - MST d2439 1 a2439 1 # Coahuila, Nuevo León, Tamaulipas (near US border) d2445 1 a2445 1 # Durango; Coahuila, Nuevo León, Tamaulipas (away from US border) d2548 1 a2548 1 # Baja California d2568 19 a2598 7 # From Paul Eggert (2015-10-08): # Formerly there was an America/Santa_Isabel zone, but this appears to # have come from a misreading of # http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 # It has been moved to the 'backward' file. # # d2673 11 a2683 1 # See America/Panama. a3045 7 # From Steffen Thorsen (2016-03-12): # Jean Antoine, editor of www.haiti-reference.com informed us that Haiti # are not going on DST this year. Several other resources confirm this: ... # http://www.radiotelevisioncaraibes.com/presse/heure_d_t_pas_de_changement_d_heure_pr_vu_pour_cet_ann_e.html # http://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/ # http://news.anmwe.com/haiti-lheure-nationale-ne-sera-ni-avancee-ni-reculee-cette-annee/ d3056 2 a3057 2 Rule Haiti 2012 2015 - Mar Sun>=8 2:00 1:00 D Rule Haiti 2012 2015 - Nov Sun>=1 2:00 0 S a3205 1 Link America/Panama America/Cayman @ 1.1.1.11 log @Import tzdata2016d from ftp://ftp.iana.org/tz/releases/tzdata2016d.tar.gz Summary of changes in tzdata2016d (2016-04-17 22:50:29 -0700): * America/Caracas switches from -0430 to -04 on 2016-05-01 at 02:30. * Asia/Magadan switches from +10 to +11 on 2016-04-24 at 02:00. * New zone Asia/Tomsk, split off from Asia/Novosibirsk. * New zone Europe/Kirov, split off from Europe/Volgograd. * Russia and nearby locations had daylight-saving transitions on 1992-03-29 at 02:00 and 1992-09-27 at 03:00, instead of on 1992-03-28 at 23:00 and 1992-09-26 at 23:00. * Many corrections to historical time in Kazakhstan from 1991 through 2005. * Mention Internet RFCs 7808 (TZDIST) and 7809 (CalDAV time zone references). Summary of changes in tzdata2016c (2016-03-23 00:51:27 -0700): * Azerbaijan no longer observes DST. * Chile reverts from permanent to seasonal DST. * Europe/Kaliningrad and Europe/Vilnius changed from +03/+04 to +02/+03 on 1989-03-26, not 1991-03-31. * Several updates and URLs for historical and proposed Russian changes. @ text @a2478 9 # This includes the following municipalities: # in Coahuila: Ocampo, Acuña, Zaragoza, Jiménez, Piedras Negras, Nava, # Guerrero, Hidalgo. # in Nuevo León: Anáhuac, Los Aldama. # in Tamaulipas: Nuevo Laredo, Guerrero, Mier, Miguel Alemán, Camargo, # Gustavo Díaz Ordaz, Reynosa, Río Bravo, Valle Hermoso, Matamoros. # See: Inicia mañana Horario de Verano en zona fronteriza, El Universal, # 2016-03-12 # http://www.eluniversal.com.mx/articulo/estados/2016/03/12/inicia-manana-horario-de-verano-en-zona-fronteriza a2499 3 # This includes the municipalities of Janos, Ascensión, Juárez, Guadalupe, # Práxedis G Guerrero, Coyame del Sotol, Ojinaga, and Manuel Benavides. # (See the 2016-03-12 El Universal source mentioned above.) @ 1.1.1.11.2.1 log @Sync with HEAD @ text @d27 2 a28 26 # From Paul Eggert (2016-09-21): # Dowd's proposal left many details unresolved, such as where to draw # lines between time zones. The key individual who made time zones # work in the US was William Frederick Allen - railway engineer, # managing editor of the Travelers' Guide, and secretary of the # General Time Convention, a railway standardization group. Allen # spent months in dialogs with scientific and railway leaders, # developed a workable plan to institute time zones, and presented it # to the General Time Convention on 1883-04-11, saying that his plan # meant "local time would be practically abolished" - a plus for # railway scheduling. By the next convention on 1883-10-11 nearly all # railroads had agreed and it took effect on 1883-11-18 at 12:00. # That Sunday was called the "day of two noons", as the eastern parts # of the new zones observed noon twice. Allen witnessed the # transition in New York City, writing: # # I heard the bells of St. Paul's strike on the old time. Four # minutes later, obedient to the electrical signal from the Naval # Observatory ... the time-ball made its rapid descent, the chimes # of old Trinity rang twelve measured strokes, and local time was # abandoned, probably forever. # # Most of the US soon followed suit. See: # Bartky IR. The adoption of standard time. Technol Cult 1989 Jan;30(1):25-56. # http://dx.doi.org/10.2307/3105430 a415 31 # From Paul Eggert (2016-08-20): # In early February 1948, in response to California's electricity shortage, # PG&E changed power frequency from 60 to 59.5 Hz during daylight hours, # causing electric clocks to lose six minutes per day. (This did not change # legal time, and is not part of the data here.) See: # Ross SA. An energy crisis from the past: Northern California in 1948. # Working Paper No. 8, Institute of Governmental Studies, UC Berkeley, # 1973-11. http://escholarship.org/uc/item/8x22k30c # # In another measure to save electricity, DST was instituted from 1948-03-14 # at 02:01 to 1949-01-16 at 02:00, with the governor having the option to move # the fallback transition earlier. See pages 3-4 of: # http://clerk.assembly.ca.gov/sites/clerk.assembly.ca.gov/files/archive/Statutes/1948/48Vol1_Chapters.pdf # # In response: # # Governor Warren received a torrent of objecting mail, and it is not too much # to speculate that the objections to Daylight Saving Time were one important # factor in the defeat of the Dewey-Warren Presidential ticket in California. # -- Ross, p 25 # # On December 8 the governor exercised the option, setting the date to January 1 # (LA Times 1948-12-09). The transition time was 02:00 (LA Times 1949-01-01). # # Despite the controversy, in 1949 California voters approved Proposition 12, # which established DST from April's last Sunday at 01:00 until September's # last Sunday at 02:00. This was amended by 1962's Proposition 6, which changed # the fall-back date to October's last Sunday. See: # http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props # http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props d418 1 a418 1 Rule CA 1948 only - Mar 14 2:01 1:00 D d420 1 a420 1 Rule CA 1950 1966 - Apr lastSun 1:00 1:00 D d3284 1 a3284 1 # The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round. See: @ 1.1.1.11.2.2 log @Sync with HEAD @ text @d181 16 a252 15 # From Paul Eggert (2016-12-19): # Here are URLs for the 1918 and 1966 legislation: # http://uscode.house.gov/statviewer.htm?volume=40&page=451 # http://uscode.house.gov/statviewer.htm?volume=80&page=108 # Although the 1918 names were officially "United States Standard # Eastern Time" and similarly for "Central", "Mountain", "Pacific", # and "Alaska", in practice "Standard" was placed just before "Time", # as codified in 1966. In practice, Alaska time was abbreviated "AST" # before 1968. Summarizing the 1967 name changes: # 1918 names 1967 names # -08 Standard Pacific Time (PST) Pacific standard time (PST) # -09 (unofficial) Yukon (YST) Yukon standard time (YST) # -10 Standard Alaska Time (AST) Alaska-Hawaii standard time (AHST) # -11 (unofficial) Nome (NST) Bering standard time (BST) # a307 9 # # From Paul Eggert (2017-02-22): # Four cities are involved. The two not mentioned above are Smiths Station # and Valley. Barbara Brooks, Valley's assistant treasurer, heard it started # because West Point Pepperell textile mills were in Alabama while the # corporate office was in Georgia, and residents voted to keep Eastern # time even after the mills closed. See: Kazek K. Did you know which # Alabama towns are in a different time zone? al.com 2017-02-06. # http://www.al.com/living/index.ssf/2017/02/do_you_know_which_alabama_town.html d485 1 a485 1 # AK%sT is the modern abbreviation for -09 per USNO. d591 4 a594 2 -10:00 - AST 1942 -10:00 US A%sT 1967 Apr d683 1 d1071 1 a1071 1 # From Paul Eggert (2017-02-10): d1078 2 a1079 2 # Many years ago Gwillim Law wrote that a good source # for time zone data was the International Air Transport d2737 6 a2742 6 Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 -0530 Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 CST Rule Belize 1973 only - Dec 5 0:00 1:00 CDT Rule Belize 1974 only - Feb 9 0:00 0 CST Rule Belize 1982 only - Dec 18 0:00 1:00 CDT Rule Belize 1983 only - Feb 12 0:00 0 CST d2745 1 a2745 1 -6:00 Belize %s d3017 6 a3022 6 Rule DR 1966 only - Oct 30 0:00 1:00 EDT Rule DR 1967 only - Feb 28 0:00 0 EST Rule DR 1969 1973 - Oct lastSun 0:00 0:30 -0430 Rule DR 1970 only - Feb 21 0:00 0 EST Rule DR 1971 only - Jan 20 0:00 0 EST Rule DR 1972 1974 - Jan 21 0:00 0 EST d3026 1 a3026 1 -5:00 DR %s 1974 Oct 27 d3316 2 a3317 2 -3:00 - -03 1987 -3:00 Canada -03/-02 @ 1.1.1.11.2.3 log @Sync with HEAD @ text @a3141 6 # From Steffen Thorsen (2017-03-12): # We have received 4 mails from different people telling that Haiti # has started DST again today, and this source seems to confirm that, # I have not been able to find a more authoritative source: # https://www.haitilibre.com/en/news-20319-haiti-notices-time-change-in-haiti.html a3153 2 Rule Haiti 2017 max - Mar Sun>=8 2:00 1:00 D Rule Haiti 2017 max - Nov Sun>=1 2:00 0 S @ 1.1.1.12 log @Import tzdata2016f from ftp://ftp.iana.org/tz/releases/tzdata2016f.tar.gz Summary of changes in tzdata2016f (2016-07-05 16:26:51 +0200): * The Egyptian government changed its mind on short notice, and Africa/Cairo will not introduce DST starting 2016-07-07 after all. * Asia/Novosibirsk switches from +06 to +07 on 2016-07-24 at 02:00. * Asia/Novokuznetsk and Asia/Novosibirsk now use numeric time zone abbreviations instead of invented ones. * Europe/Minsk's 1992-03-29 spring-forward transition was at 02:00 not 00:00. Summary of changes in tzdata2016e (2016-06-14 08:46:16 -0700): * Africa/Cairo observes DST in 2016 from July 7 to the end of October. (change obsoleted by 2016f) * Locations while uninhabited now use '-00', not 'zzz', as a placeholder time zone abbreviation. * Asia/Baku's 1992-09-27 transition from +04 (DST) to +04 (non-DST) was at 03:00, not 23:00 the previous day. * zic now outputs a dummy transition at time 2**31 - 1 in zones whose POSIX-style TZ strings contain a '<'. * Changes affecting documentation and commentary. @ text @d2194 1 a2194 1 Zone America/Pangnirtung 0 - -00 1921 # trading post est. d2200 1 a2200 1 Zone America/Iqaluit 0 - -00 1942 Aug # Frobisher Bay est. d2205 1 a2205 1 Zone America/Resolute 0 - -00 1947 Aug 31 # Resolute founded d2212 1 a2212 1 Zone America/Rankin_Inlet 0 - -00 1957 # Rankin Inlet founded d2217 1 a2217 1 Zone America/Cambridge_Bay 0 - -00 1920 # trading post est.? d2223 1 a2223 1 Zone America/Yellowknife 0 - -00 1935 # Yellowknife founded? d2226 1 a2226 1 Zone America/Inuvik 0 - -00 1953 # Inuvik founded @ 1.1.1.13 log @Import tzdata2016g from ftp://ftp.iana.org/tz/releases/tzdata2016g.tar.gz Summary of changes in tzdata2016g (2016-09-13 08:56:38 -0700): Timezone switch in Turkey (summer time becomes standard time) Transition time corrections for historic timestamps in America/Los_Angeles zones using USSR rules in early 20th century Some (more) time zone abbreviations converted to numeric form Asia/Rangoon becomes Asia/Yangon (with backward compat link) @ text @a415 31 # From Paul Eggert (2016-08-20): # In early February 1948, in response to California's electricity shortage, # PG&E changed power frequency from 60 to 59.5 Hz during daylight hours, # causing electric clocks to lose six minutes per day. (This did not change # legal time, and is not part of the data here.) See: # Ross SA. An energy crisis from the past: Northern California in 1948. # Working Paper No. 8, Institute of Governmental Studies, UC Berkeley, # 1973-11. http://escholarship.org/uc/item/8x22k30c # # In another measure to save electricity, DST was instituted from 1948-03-14 # at 02:01 to 1949-01-16 at 02:00, with the governor having the option to move # the fallback transition earlier. See pages 3-4 of: # http://clerk.assembly.ca.gov/sites/clerk.assembly.ca.gov/files/archive/Statutes/1948/48Vol1_Chapters.pdf # # In response: # # Governor Warren received a torrent of objecting mail, and it is not too much # to speculate that the objections to Daylight Saving Time were one important # factor in the defeat of the Dewey-Warren Presidential ticket in California. # -- Ross, p 25 # # On December 8 the governor exercised the option, setting the date to January 1 # (LA Times 1948-12-09). The transition time was 02:00 (LA Times 1949-01-01). # # Despite the controversy, in 1949 California voters approved Proposition 12, # which established DST from April's last Sunday at 01:00 until September's # last Sunday at 02:00. This was amended by 1962's Proposition 6, which changed # the fall-back date to October's last Sunday. See: # http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props # http://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props d418 1 a418 1 Rule CA 1948 only - Mar 14 2:01 1:00 D d420 1 a420 1 Rule CA 1950 1966 - Apr lastSun 1:00 1:00 D d3284 1 a3284 1 # The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round. See: @ 1.1.1.14 log @Import tzdata2016h from ftp://ftp.iana.org/tz/releases/tzdata2016h.tar.gz Summary of changes in tzdata2016h (2016-10-19 23:17:57 -0700): Asia/Gaza and Asia/Hebron end of summer time for 2016 is 2016-10-29 at 01:00 rather than 2016-10-21 at 00:00 (which is within hours after this update). Guess that future end dates will be the last Sat of October. Corrected some historic time (and one date) transition times for Turkey (all 1990 or before.) Switch Sri-Lanka to use numeric abbreviation for time zone as the tzdata invented one is not correct, and the correct one seems not to be widely used. @ text @d27 2 a28 26 # From Paul Eggert (2016-09-21): # Dowd's proposal left many details unresolved, such as where to draw # lines between time zones. The key individual who made time zones # work in the US was William Frederick Allen - railway engineer, # managing editor of the Travelers' Guide, and secretary of the # General Time Convention, a railway standardization group. Allen # spent months in dialogs with scientific and railway leaders, # developed a workable plan to institute time zones, and presented it # to the General Time Convention on 1883-04-11, saying that his plan # meant "local time would be practically abolished" - a plus for # railway scheduling. By the next convention on 1883-10-11 nearly all # railroads had agreed and it took effect on 1883-11-18 at 12:00. # That Sunday was called the "day of two noons", as the eastern parts # of the new zones observed noon twice. Allen witnessed the # transition in New York City, writing: # # I heard the bells of St. Paul's strike on the old time. Four # minutes later, obedient to the electrical signal from the Naval # Observatory ... the time-ball made its rapid descent, the chimes # of old Trinity rang twelve measured strokes, and local time was # abandoned, probably forever. # # Most of the US soon followed suit. See: # Bartky IR. The adoption of standard time. Technol Cult 1989 Jan;30(1):25-56. # http://dx.doi.org/10.2307/3105430 @ 1.1.1.14.2.1 log @Sync with HEAD @ text @d181 16 a252 15 # From Paul Eggert (2016-12-19): # Here are URLs for the 1918 and 1966 legislation: # http://uscode.house.gov/statviewer.htm?volume=40&page=451 # http://uscode.house.gov/statviewer.htm?volume=80&page=108 # Although the 1918 names were officially "United States Standard # Eastern Time" and similarly for "Central", "Mountain", "Pacific", # and "Alaska", in practice "Standard" was placed just before "Time", # as codified in 1966. In practice, Alaska time was abbreviated "AST" # before 1968. Summarizing the 1967 name changes: # 1918 names 1967 names # -08 Standard Pacific Time (PST) Pacific standard time (PST) # -09 (unofficial) Yukon (YST) Yukon standard time (YST) # -10 Standard Alaska Time (AST) Alaska-Hawaii standard time (AHST) # -11 (unofficial) Nome (NST) Bering standard time (BST) # a307 9 # # From Paul Eggert (2017-02-22): # Four cities are involved. The two not mentioned above are Smiths Station # and Valley. Barbara Brooks, Valley's assistant treasurer, heard it started # because West Point Pepperell textile mills were in Alabama while the # corporate office was in Georgia, and residents voted to keep Eastern # time even after the mills closed. See: Kazek K. Did you know which # Alabama towns are in a different time zone? al.com 2017-02-06. # http://www.al.com/living/index.ssf/2017/02/do_you_know_which_alabama_town.html d485 1 a485 1 # AK%sT is the modern abbreviation for -09 per USNO. d591 4 a594 2 -10:00 - AST 1942 -10:00 US A%sT 1967 Apr d683 1 d1071 1 a1071 1 # From Paul Eggert (2017-02-10): d1078 2 a1079 2 # Many years ago Gwillim Law wrote that a good source # for time zone data was the International Air Transport d2737 6 a2742 6 Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 -0530 Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 CST Rule Belize 1973 only - Dec 5 0:00 1:00 CDT Rule Belize 1974 only - Feb 9 0:00 0 CST Rule Belize 1982 only - Dec 18 0:00 1:00 CDT Rule Belize 1983 only - Feb 12 0:00 0 CST d2745 1 a2745 1 -6:00 Belize %s d3017 6 a3022 6 Rule DR 1966 only - Oct 30 0:00 1:00 EDT Rule DR 1967 only - Feb 28 0:00 0 EST Rule DR 1969 1973 - Oct lastSun 0:00 0:30 -0430 Rule DR 1970 only - Feb 21 0:00 0 EST Rule DR 1971 only - Jan 20 0:00 0 EST Rule DR 1972 1974 - Jan 21 0:00 0 EST d3026 1 a3026 1 -5:00 DR %s 1974 Oct 27 a3136 6 # From Steffen Thorsen (2017-03-12): # We have received 4 mails from different people telling that Haiti # has started DST again today, and this source seems to confirm that, # I have not been able to find a more authoritative source: # https://www.haitilibre.com/en/news-20319-haiti-notices-time-change-in-haiti.html a3148 2 Rule Haiti 2017 max - Mar Sun>=8 2:00 1:00 D Rule Haiti 2017 max - Nov Sun>=1 2:00 0 S d3316 2 a3317 2 -3:00 - -03 1987 -3:00 Canada -03/-02 @ 1.1.1.15 log @Import tzdata2017a from ftp://ftp.iana.org/tz/releases/tzdata2017a.tar.gz Summary of changes in tzdata2017a (2017-02-28 00:05:36 -0800): Briefly: Southern Chile moves from -04/-03 to -03, and Mongolia discontinues DST. Changes to future time stamps Mongolia no longer observes DST. Chile's Region of Magallanes moves from -04/-03 to -03 year-round. Changes to past time stamps Fix many entries for historical time stamps for Europe/Madrid before 1979, to agree with tables compiled by Pere Planesas of the National Astronomical Observatory of Spain. As a side effect, this changes some time stamps for Africa/Ceuta before 1929, which are probably guesswork anyway. Ecuador observed DST from 1992-11-28 to 1993-02-05. Asia/Atyrau and Asia/Oral were at +03 (not +04) before 1930-06-21. Changes to past and future time zone abbreviations Switch to numeric time zone abbreviations for South America, as part of the ongoing project of removing invented abbreviations. For Alaska time from 1900 through 1967, instead of "CAT" use the abbreviation "AST", the abbreviation commonly used at the time (Atlantic Standard Time had not been standardized yet). Use "AWT" and "APT" instead of the invented abbreviations "CAWT" and "CAPT". Use "CST" and "CDT" instead of invented abbreviations for Macau before 1999 and Taiwan before 1938, and use "JST" instead of the invented abbreviation "JCST" for Japan and Korea before 1938. Change to database entry category Move the Pacific/Johnston link from 'australasia' to 'backward', since Johnston is now uninhabited. @ text @d181 16 a252 15 # From Paul Eggert (2016-12-19): # Here are URLs for the 1918 and 1966 legislation: # http://uscode.house.gov/statviewer.htm?volume=40&page=451 # http://uscode.house.gov/statviewer.htm?volume=80&page=108 # Although the 1918 names were officially "United States Standard # Eastern Time" and similarly for "Central", "Mountain", "Pacific", # and "Alaska", in practice "Standard" was placed just before "Time", # as codified in 1966. In practice, Alaska time was abbreviated "AST" # before 1968. Summarizing the 1967 name changes: # 1918 names 1967 names # -08 Standard Pacific Time (PST) Pacific standard time (PST) # -09 (unofficial) Yukon (YST) Yukon standard time (YST) # -10 Standard Alaska Time (AST) Alaska-Hawaii standard time (AHST) # -11 (unofficial) Nome (NST) Bering standard time (BST) # a307 9 # # From Paul Eggert (2017-02-22): # Four cities are involved. The two not mentioned above are Smiths Station # and Valley. Barbara Brooks, Valley's assistant treasurer, heard it started # because West Point Pepperell textile mills were in Alabama while the # corporate office was in Georgia, and residents voted to keep Eastern # time even after the mills closed. See: Kazek K. Did you know which # Alabama towns are in a different time zone? al.com 2017-02-06. # http://www.al.com/living/index.ssf/2017/02/do_you_know_which_alabama_town.html d485 1 a485 1 # AK%sT is the modern abbreviation for -09 per USNO. d591 4 a594 2 -10:00 - AST 1942 -10:00 US A%sT 1967 Apr d683 1 d1071 1 a1071 1 # From Paul Eggert (2017-02-10): d1078 2 a1079 2 # Many years ago Gwillim Law wrote that a good source # for time zone data was the International Air Transport d2737 6 a2742 6 Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 -0530 Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 CST Rule Belize 1973 only - Dec 5 0:00 1:00 CDT Rule Belize 1974 only - Feb 9 0:00 0 CST Rule Belize 1982 only - Dec 18 0:00 1:00 CDT Rule Belize 1983 only - Feb 12 0:00 0 CST d2745 1 a2745 1 -6:00 Belize %s d3017 6 a3022 6 Rule DR 1966 only - Oct 30 0:00 1:00 EDT Rule DR 1967 only - Feb 28 0:00 0 EST Rule DR 1969 1973 - Oct lastSun 0:00 0:30 -0430 Rule DR 1970 only - Feb 21 0:00 0 EST Rule DR 1971 only - Jan 20 0:00 0 EST Rule DR 1972 1974 - Jan 21 0:00 0 EST d3026 1 a3026 1 -5:00 DR %s 1974 Oct 27 d3316 2 a3317 2 -3:00 - -03 1987 -3:00 Canada -03/-02 @ 1.1.1.16 log @Import tzdata2017b from ftp://ftp.iana.org/tz/releases/tzdata2017b.tar.gz Summary of changes in tzdata2017b (2017-03-17 07:30:38 -0700): Haiti resumed observance of DST in 2017 (on Mar 12) Liberia changed from -004430 to +00 on 1972-01-07, not 1972-05-01. Use "MMT" to abbreviate Liberia's time zone before 1972, as "-004430" (tzdata2016a) is one byte over the POSIX limit. @ text @a3141 6 # From Steffen Thorsen (2017-03-12): # We have received 4 mails from different people telling that Haiti # has started DST again today, and this source seems to confirm that, # I have not been able to find a more authoritative source: # https://www.haitilibre.com/en/news-20319-haiti-notices-time-change-in-haiti.html a3153 2 Rule Haiti 2017 max - Mar Sun>=8 2:00 1:00 D Rule Haiti 2017 max - Nov Sun>=1 2:00 0 S @ 1.1.1.16.4.1 log @Pull up following revision(s) (requested by kre in ticket #333): doc/3RDPARTY: 1.1479 distrib/sets/lists/base/mi: 1.1164 external/public-domain/tz/dist/CONTRIBUTING: up to 1.1.1.4 external/public-domain/tz/dist/LICENSE: up to 1.1.1.3 external/public-domain/tz/dist/Makefile: up to 1.1.1.18 external/public-domain/tz/dist/NEWS: up to 1.1.1.19 external/public-domain/tz/dist/TZDATA_VERSION: up to 1.9 external/public-domain/tz/dist/Theory: delete external/public-domain/tz/dist/africa: up to 1.1.1.12 external/public-domain/tz/dist/antarctica: up to 1.1.1.9 external/public-domain/tz/dist/asia: up to 1.1.1.17 external/public-domain/tz/dist/australasia: up to 1.1.1.12 external/public-domain/tz/dist/backward: up to 1.1.1.8 external/public-domain/tz/dist/backzone: up to 1.1.1.12 external/public-domain/tz/dist/calendars: up to 1.1.1.1 external/public-domain/tz/dist/checklinks.awk: up to 1.1.1.3 external/public-domain/tz/dist/europe: up to 1.1.1.18 external/public-domain/tz/dist/leap-seconds.list: up to 1.1.1.8 external/public-domain/tz/dist/leapseconds: up to 1.1.1.9 external/public-domain/tz/dist/leapseconds.awk: up to 1.1.1.6 external/public-domain/tz/dist/northamerica: up to 1.1.1.17 external/public-domain/tz/dist/southamerica: up to 1.1.1.12 external/public-domain/tz/dist/theory.html: up to 1.1.1.1 external/public-domain/tz/dist/version: up to 1.1.1.6 external/public-domain/tz/dist/zishrink.awk: up to 1.1.1.1 external/public-domain/tz/dist/zone.tab: up to 1.1.1.12 external/public-domain/tz/dist/zone1970.tab: up to 1.1.1.14 Update tzdata to 2017c. @ text @d108 1 a108 1 # https://web.archive.org/web/20000926032210/http://rowayton.org/rhs/hstaug45.html a111 3 # # From Paul Eggert (2017-09-23): # This was the V-J Day issue of the Clamdigger, a Rowayton, CT newsletter. d260 1 a260 1 # https://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf d349 1 a349 1 # https://docs.legis.wisconsin.gov/statutes/statutes/175.pdf d358 1 a358 1 # https://docs.legis.wisconsin.gov/2007/related/acts/3 d405 1 a405 1 # https://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm d456 1 a456 1 # 1973-11. https://escholarship.org/uc/item/8x22k30c d477 2 a478 2 # https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props # https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props d495 1 a495 1 # From Paul Eggert (2017-06-15): d498 4 a501 10 # On Friday, 1867-10-18 (Gregorian), at precisely 15:30 local time, the # Russian forts and fleet at Sitka fired salutes to mark the ceremony of # formal transfer. See the Sacramento Daily Union (1867-11-14), p 3, col 2. # https://cdnc.ucr.edu/cgi-bin/cdnc?a=d&d=SDU18671114.2.12.1 # Sitka workers did not change their calendars until Sunday, 1867-10-20, # and so celebrated two Sundays that week. See: Ahllund T (tr Hallamaa P). # From the memoirs of a Finnish workman. Alaska History. 2006 Fall;21(2):1-25. # http://alaskahistoricalsociety.org/wp-content/uploads/2016/12/Ahllund-2006-Memoirs-of-a-Finnish-Workman.pdf # Include only the time zone part of this transition, ignoring the switch # from Julian to Gregorian, since we can't represent the Julian calendar. d503 1 a503 1 # As far as we know, of the locations mentioned below only Sitka was d505 4 a508 9 # (Yakutat was colonized by the Russians in 1799, but the settlement was # destroyed in 1805 by a Yakutat-kon war party.) Many of Alaska's inhabitants # were unaware of the US acquisition of Alaska, much less of any calendar or # time change. However, the Russian-influenced part of Alaska did observe # Russian time, and it is more accurate to model this than to ignore it. # The database format requires an exact transition time; use the Russian # salute as a somewhat-arbitrary time for the formal transfer of control for # all of Alaska. Sitka's UTC offset is -9:01:13; adjust its 15:30 to the # local times of other Alaskan locations so that they change simultaneously. d561 1 a561 1 # https://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/ d564 1 a564 1 Zone America/Juneau 15:02:19 - LMT 1867 Oct 19 15:33:32 d574 1 a574 1 Zone America/Sitka 14:58:47 - LMT 1867 Oct 19 15:30 d582 1 a582 1 Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 19 15:44:55 d590 1 a590 1 Zone America/Yakutat 14:41:05 - LMT 1867 Oct 19 15:12:18 d597 1 a597 1 Zone America/Anchorage 14:00:24 - LMT 1867 Oct 19 14:31:37 d605 1 a605 1 Zone America/Nome 12:58:22 - LMT 1867 Oct 19 13:29:35 d614 1 a614 1 Zone America/Adak 12:13:22 - LMT 1867 Oct 19 12:44:35 d650 1 a650 1 # https://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf d749 1 a749 1 # https://en.wikipedia.org/wiki/Time_in_Indiana d976 1 a976 1 # https://www.gpo.gov/fdsys/pkg/FR-2000-08-17/html/00-20854.htm d1002 1 a1002 1 # https://www.gpo.gov/fdsys/pkg/FR-1999-10-21/html/99-27240.htm a1031 13 # From Paul Eggert (2017-07-26): # Although Shanks says Detroit observed DST in 1967 from 06-14 00:01 # until 10-29 00:01, I now see multiple reports that this is incorrect. # For example, according to a 50-year anniversary report about the 1967 # Detroit riots and a major-league doubleheader on 1967-07-23, "By the time # the last fly ball of the doubleheader settled into the glove of leftfielder # Lenny Green, it was after 7 p.m. Detroit did not observe daylight saving # time, so light was already starting to fail. Twilight was made even deeper # by billowing columns of smoke that ascended in an unbroken wall north of the # ballpark." See: Dow B. Detroit '67: As violence unfolded, Tigers played two # at home vs. Yankees. Detroit Free Press 2017-07-23. # https://www.freep.com/story/sports/mlb/tigers/2017/07/23/detroit-tigers-1967-riot-new-york-yankees/499951001/ # d1036 2 d1101 1 a1101 1 # . d1147 1 a1147 1 # https://archive.news.gov.bc.ca/releases/news_releases_2005-2009/2006AG0014-000330.htm d1151 1 a1151 1 # https://www.novascotia.ca/just/regulations/rg2/2006/ma1206.pdf d1155 1 a1155 1 # https://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf d1159 1 a1159 1 # https://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php d1173 1 a1173 1 # https://www.gov.yk.ca/legislation/regs/oic2006_127.pdf d1194 2 a1195 2 # https://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html # https://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5 d1232 5 a1236 7 # From Paul Eggert (2017-10-14): # Legally Labrador should observe Newfoundland time; see: # McLeod J. Labrador time - legal or not? St. John's Telegram, 2017-10-07 # http://www.thetelegram.com/news/local/labrador-time--legal-or-not-154860/ # Matthews and Vincent (1998) write that the only part of Labrador # that follows the rules is the southeast corner, including Port Hope # Simpson and Mary's Harbour, but excluding, say, Black Tickle. d1436 1 a1436 1 # https://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en a1467 5 # # From Paul Eggert (2017-07-08): # For more on Orillia, see: Daubs K. Bold attempt at daylight saving # time became a comic failure in Orillia. Toronto Star 2017-07-08. # https://www.thestar.com/news/insight/2017/07/08/bold-attempt-at-daylight-saving-time-became-a-comic-failure-in-orillia.html d1959 1 a1959 1 # [https://www.canlii.org/en/ca/laws/stat/rsc-1985-c-i-21/latest/rsc-1985-c-i-21.html] d2024 1 a2024 1 # https://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html d2039 1 a2039 1 # https://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html d2051 1 a2051 1 # https://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html d2065 1 a2065 1 # https://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html d2108 1 a2108 1 # http://www.nunatsiaqonline.ca/archives/nunavut991130/nvt91119_17.html d2126 1 a2126 1 # From d2457 1 a2457 1 # https://www.timeanddate.com/news/time/north-mexico-dst-change.html d2876 1 a2876 1 # https://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html d2923 1 a2923 1 # https://www.timeanddate.com/news/time/cuba-starts-dst-2011.html d2933 1 a2933 1 # https://www.timeanddate.com/news/time/cuba-time-changes-2011.html d2943 1 a2943 1 # https://www.timeanddate.com/news/time/cuba-starts-dst-2012.html d3138 2 a3139 2 # https://www.radiotelevisioncaraibes.com/presse/heure_d_t_pas_de_changement_d_heure_pr_vu_pour_cet_ann_e.html # https://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/ d3338 1 a3338 1 # https://bugs.debian.org/415007 a3359 12 # From the Turks & Caicos Cabinet (2017-07-20), heads-up from Steffen Thorsen: # ... agreed to the reintroduction in TCI of Daylight Saving Time (DST) # during the summer months and Standard Time, also known as Local # Time, during the winter months with effect from April 2018 ... # https://www.gov.uk/government/news/turks-and-caicos-post-cabinet-meeting-statement--3 # # From Paul Eggert (2017-08-26): # The date of effect of the spring 2018 change appears to be March 11, # which makes more sense. See: Hamilton D. Time change back # by March 2018 for TCI. Magnetic Media. 2017-08-25. # http://magneticmediatv.com/2017/08/time-change-back-by-march-2018-for-tci/ # d3365 1 a3365 2 -4:00 - AST 2018 Mar 11 3:00 -5:00 US E%sT @ 1.1.1.16.4.2 log @Catch up to current for the following files, requeted by kre in ticket 513: external/public-domain/tz/dist/Makefile up to 1.1.1.19 external/public-domain/tz/dist/NEWS up to 1.1.1.20 external/public-domain/tz/dist/README up to 1.1.1.6 external/public-domain/tz/dist/TZDATA_VERSION up to 1.10 external/public-domain/tz/dist/africa up to 1.1.1.13 external/public-domain/tz/dist/asia up to 1.1.1.18 external/public-domain/tz/dist/australasia up to 1.1.1.13 external/public-domain/tz/dist/backzone up to 1.1.1.13 external/public-domain/tz/dist/europe up to 1.1.1.19 external/public-domain/tz/dist/leap-seconds.list up to 1.1.1.9 external/public-domain/tz/dist/leapseconds up to 1.1.1.10 external/public-domain/tz/dist/northamerica up to 1.1.1.18 external/public-domain/tz/dist/southamerica up to 1.1.1.13 external/public-domain/tz/dist/theory.html up to 1.1.1.2 external/public-domain/tz/dist/version up to 1.1.1.7 external/public-domain/tz/dist/zishrink.awk up to 1.1.1.2 external/public-domain/tz/dist/zone.tab up to 1.1.1.13 external/public-domain/tz/dist/zone1970.tab up to 1.1.1.15 doc/3RDPARTY 1.1496 (via patch) Import tzdata2018c. @ text @a350 12 # From Paul Eggert (2018-01-07): # In 1869 the Chicago Astronomical Society contracted with the city to keep # time. Though delayed by the Great Fire, by 1880 a wire ran from the # Dearborn Observatory (on the University of Chicago campus) to City Hall, # which then sent signals to police and fire stations. However, railroads got # their time signals from the Allegheny Observatory, the Madison Observatory, # the Ann Arbor Observatory, etc., so their clocks did not agree with each # other or with the city's official time. The confusion took some years to # clear up. See: # Moser M. How Chicago gave America its time zones. Chicago. 2018-01-04. # http://www.chicagomag.com/city-life/January-2018/How-Chicago-Gave-America-Its-Time-Zones/ d1899 1 a1899 1 # i.e. Creston has been stuck on UT-7 for 93 years. @ 1.1.1.16.4.3 log @Pull up following revision(s) (requested by kre in ticket #654): doc/3RDPARTY: 1.1506 via patch external/public-domain/tz/dist/CONTRIBUTING: up to 1.1.1.5 external/public-domain/tz/dist/Makefile: up to 1.1.1.20 external/public-domain/tz/dist/NEWS: up to 1.1.1.21 external/public-domain/tz/dist/TZDATA_VERSION: up to 1.11 external/public-domain/tz/dist/africa: up to 1.1.1.14 external/public-domain/tz/dist/antarctica: up to 1.1.1.10 external/public-domain/tz/dist/asia: up to 1.1.1.19 external/public-domain/tz/dist/australasia: up to 1.1.1.14 external/public-domain/tz/dist/backzone: up to 1.1.1.14 external/public-domain/tz/dist/checktab.awk: up to 1.1.1.9 external/public-domain/tz/dist/europe: up to 1.1.1.20 external/public-domain/tz/dist/northamerica: up to 1.1.1.19 external/public-domain/tz/dist/southamerica: up to 1.1.1.14 external/public-domain/tz/dist/theory.html: up to 1.1.1.3 external/public-domain/tz/dist/version: up to 1.1.1.8 external/public-domain/tz/dist/ziguard.awk: up to 1.1.1.1 external/public-domain/tz/dist/zishrink.awk: up to 1.1.1.3 external/public-domain/tz/dist/zone.tab: up to 1.1.1.14 external/public-domain/tz/dist/zone1970.tab: up to 1.1.1.16 external/public-domain/tz/tzdata2netbsd: up to 1.12 Update tzdata to 2018d. @ text @d28 1 a28 1 # From Paul Eggert (2018-03-20): d39 4 a42 3 # railroads had agreed and it took effect on 1883-11-18. That Sunday # was called the "day of two noons", as some locations observed noon # twice. Allen witnessed the transition in New York City, writing: d427 2 a428 1 # at 47° 15' 51" N, 101° 46' 40" W, which yields an offset of 6h47'07". d461 1 a461 1 # Nevada (except West Wendover), Oregon (except the northern ¾ of a958 7 # From Paul Eggert (2018-03-20): # The Louisville & Nashville Railroad's 1883-11-18 change occurred at # 10:00 old local time; train were supposed to come to a standstill # for precisely 18 minutes. See Bartky Fig. 1 (page 50). It is not # clear how this matched civil time in Louisville, so for now continue # to assume Louisville switched at noon new local time, like New York. # d3267 2 a3268 2 Zone America/Jamaica -5:07:10 - LMT 1890 # Kingston -5:07:10 - KMT 1912 Feb # Kingston Mean Time d3418 1 a3418 1 -5:07:10 - KMT 1912 Feb # Kingston Mean Time @ 1.1.1.16.4.4 log @Sync the following with current, requested by kre in ticket #1068 external/public-domain/tz/dist/CONTRIBUTING up to 1.1.1.6 external/public-domain/tz/dist/Makefile up to 1.1.1.22 external/public-domain/tz/dist/NEWS up to 1.1.1.23 external/public-domain/tz/dist/README up to 1.1.1.7 external/public-domain/tz/dist/TZDATA_VERSION up to 1.13 external/public-domain/tz/dist/africa up to 1.1.1.16 external/public-domain/tz/dist/antarctica up to 1.1.1.11 external/public-domain/tz/dist/asia up to 1.1.1.21 external/public-domain/tz/dist/australasia up to 1.1.1.16 external/public-domain/tz/dist/backward up to 1.1.1.9 external/public-domain/tz/dist/backzone up to 1.1.1.15 external/public-domain/tz/dist/etcetera up to 1.1.1.3 external/public-domain/tz/dist/europe up to 1.1.1.22 external/public-domain/tz/dist/factory up to 1.1.1.3 external/public-domain/tz/dist/leap-seconds.list up to 1.1.1.10 external/public-domain/tz/dist/leapseconds up to 1.1.1.11 external/public-domain/tz/dist/leapseconds.awk up to 1.1.1.7 external/public-domain/tz/dist/northamerica up to 1.1.1.20 external/public-domain/tz/dist/pacificnew up to 1.1.1.2 external/public-domain/tz/dist/southamerica up to 1.1.1.15 external/public-domain/tz/dist/systemv up to 1.1.1.2 external/public-domain/tz/dist/theory.html up to 1.1.1.5 external/public-domain/tz/dist/version up to 1.1.1.10 external/public-domain/tz/dist/yearistype.sh up to 1.1.1.2 external/public-domain/tz/dist/zishrink.awk up to 1.1.1.4 external/public-domain/tz/dist/zone.tab up to 1.1.1.15 external/public-domain/tz/dist/zone1970.tab up to 1.1.1.17 external/public-domain/tz/dist/zoneinfo2tdf.pl up to 1.1.1.2 doc/3RDPARTY 1.1568 (patch Import tzdata2018f from ftp://ftp.iana.org/tz/releases/tzdata2018f.tar.gz Volgograd moves from +03 to +04 on 2018-10-28. Fiji ends DST 2019-01-13, not 2019-01-20. Most of Chile changes DST dates, effective 2019-04-06. Plus corrections to North Korea's 2018-05-05 and China's April 1988 updates (getting the actual time/date of the transition correct) Corrections for Macau pre 1992, Japan in late 1940's - early 1950's, and China (Shanghai) 1940's. The Phillipines get their timezone name abbreviations back. @ text @a0 2 # tzdb data for North and Central America and environs d51 1 a51 1 # https://dx.doi.org/10.2307/3105430 @ 1.1.1.16.4.5 log @Sync to -current, requested by kre in ticket #1073: external/public-domain/tz/dist/NEWS up to 1.1.1.24 external/public-domain/tz/dist/TZDATA_VERSION up to 1.14 external/public-domain/tz/dist/africa up to 1.1.1.17 external/public-domain/tz/dist/europe up to 1.1.1.23 external/public-domain/tz/dist/northamerica up to 1.1.1.21 external/public-domain/tz/dist/theory.html up to 1.1.1.6 external/public-domain/tz/dist/version up to 1.1.1.11 external/public-domain/tz/dist/ziguard.awk up to 1.1.1.3 external/public-domain/tz/dist/zishrink.awk up to 1.1.1.5 doc/3RDPARTY (patch) Import tzdata2018g from ftp://ftp.iana.org/tz/releases/tzdata2018g.tar.gz Summary of changes in tzdata2018g (2018-10-26 22:22:45 -0700): Morocco switches to permanent +01 on 2018-10-27. @ text @a441 13 # From Paul Eggert (2018-10-25): # On 1921-03-04 federal law placed all of Texas into the central time zone. # However, El Paso ignored the law for decades and continued to observe # mountain time, on the grounds that that's what they had always done # and they weren't about to let the federal government tell them what to do. # Eventually the federal government gave in and changed the law on # 1970-04-10 to match what El Paso was actually doing. Although # that's slightly after our 1970 cutoff, there is no need to create a # separate zone for El Paso since they were ignoring the law anyway. See: # Long T. El Pasoans were time rebels, fought to stay in Mountain zone. # El Paso Times. 2018-10-24 06:40 -06. # https://www.elpasotimes.com/story/news/local/el-paso/2018/10/24/el-pasoans-were-time-rebels-fought-stay-mountain-zone/1744509002/ # d711 3 a713 1 -10:30 US H%sT 1947 Jun 8 2:00 @ 1.1.1.16.4.6 log @Pull up the following, requested by kre in ticket #1150: doc/3RDPARTY 1.1581 (patch) distrib/sets/lists/base/mi 1.1196 (patch) external/public-domain/tz/dist/Makefile up to 1.1.1.23 external/public-domain/tz/dist/NEWS up to 1.1.1.26 external/public-domain/tz/dist/TZDATA_VERSION up to 1.16 external/public-domain/tz/dist/africa up to 1.1.1.19 external/public-domain/tz/dist/asia up to 1.1.1.22 external/public-domain/tz/dist/australasia up to 1.1.1.17 external/public-domain/tz/dist/leapseconds up to 1.1.1.12 external/public-domain/tz/dist/leapseconds.awk up to 1.1.1.8 external/public-domain/tz/dist/northamerica up to 1.1.1.22 external/public-domain/tz/dist/theory.html up to 1.1.1.7 external/public-domain/tz/dist/version up to 1.1.1.13 external/public-domain/tz/dist/ziguard.awk up to 1.1.1.4 external/public-domain/tz/dist/zone.tab up to 1.1.1.16 external/public-domain/tz/dist/zone1970.tab up to 1.1.1.18 Import tzdata2018h from ftp://ftp.iana.org/tz/releases/tzdata2018h.tar.gz Summary of changes in tzdata2018h (2018-12-23 17:59:32 -0800): Qyzylorda (aka Kyzylorda) oblast in Kazakhstan moved from +06 to +05 on 2018-12-21. This is a zone split as Qostanay (aka Kostanay) did not switch, so create a zone Asia/Qostanay. Metlakatla, Alaska observes PST this winter only. Add predictions for Iran from 2038 through 2090. Changes to some old timestamps for Nauru (1979) Guam (1959-77), Hong Kong (1904, 1941, 1945, 1952) (others in Pacific during WWII) Summary of changes in tzdata2018i (2018-12-30 11:05:43 -0800): Due to a change in government, Sao Tome and Principe switches back from +01 to +00 on 2019-01-01 at 02:00. @ text @a601 11 # From Ryan Stanley (2018-11-06): # The Metlakatla community in Alaska has decided not to change its # clock back an hour starting on November 4th, 2018 (day before yesterday). # They will be gmtoff=-28800 year-round. # https://www.facebook.com/141055983004923/photos/pb.141055983004923.-2207520000.1541465673./569081370202380/ # From Paul Eggert (2018-12-16): # In a 2018-12-11 special election, Metlakatla voted to go back to # Alaska time (including daylight saving time) starting next year. # https://www.krbd.org/2018/12/12/metlakatla-to-follow-alaska-standard-time-allow-liquor-sales/ a627 2 -9:00 US AK%sT 2018 Nov 4 2:00 -8:00 - PST 2019 Mar Sun>=8 3:00 a787 16 # From Paul Eggert (2018-11-30): # A brief but entertaining history of time in Indiana describes a 1949 debate # in the Indiana House where city legislators (who favored "fast time") # tussled with farm legislators (who didn't) over a bill to outlaw DST: # "Lacking enough votes, the city faction tries to filibuster until time runs # out on the session at midnight, but rural champion Rep. Herbert Copeland, # R-Madison, leans over the gallery railing and forces the official clock # back to 9 p.m., breaking it in the process. The clock sticks on 9 as the # debate rages on into the night. The filibuster finally dies out and the # bill passes, while outside the chamber, clocks read 3:30 a.m. In the end, # it doesn't matter which side won. The law has no enforcement powers and # is simply ignored by fast-time communities." # How Indiana went from 'God's time' to split zones and daylight-saving. # Indianapolis Star. 2018-11-27 14:58 -05. # https://www.indystar.com/story/news/politics/2018/11/27/indianapolis-indiana-time-zone-history-central-eastern-daylight-savings-time/2126300002/ # @ 1.1.1.16.4.7 log @Pull up the following, requested by kre in ticket #1631: external/public-domain/tz/dist/systemv delete external/public-domain/tz/dist/pacificnew delete external/public-domain/tz/dist/yearistype.sh delete external/public-domain/tz/dist/Makefile up to 1.1.1.29 external/public-domain/tz/dist/NEWS up to 1.1.1.32 external/public-domain/tz/dist/README up to 1.1.1.9 external/public-domain/tz/dist/TZDATA_VERSION up to 1.22 external/public-domain/tz/dist/africa up to 1.1.1.23 external/public-domain/tz/dist/antarctica up to 1.1.1.13 external/public-domain/tz/dist/asia up to 1.1.1.27 external/public-domain/tz/dist/australasia up to 1.1.1.20 external/public-domain/tz/dist/backward up to 1.1.1.11 external/public-domain/tz/dist/backzone up to 1.1.1.19 external/public-domain/tz/dist/checktab.awk up to 1.1.1.10 external/public-domain/tz/dist/etcetera up to 1.1.1.4 external/public-domain/tz/dist/europe up to 1.1.1.29 external/public-domain/tz/dist/factory up to 1.1.1.4 external/public-domain/tz/dist/iso3166.tab up to 1.1.1.6 external/public-domain/tz/dist/leap-seconds.list up to 1.1.1.14 external/public-domain/tz/dist/leapseconds up to 1.1.1.16 external/public-domain/tz/dist/leapseconds.awk up to 1.1.1.11 external/public-domain/tz/dist/northamerica up to 1.1.1.26 external/public-domain/tz/dist/southamerica up to 1.1.1.17 external/public-domain/tz/dist/theory.html up to 1.1.1.11 external/public-domain/tz/dist/version up to 1.1.1.19 external/public-domain/tz/dist/ziguard.awk up to 1.1.1.5 external/public-domain/tz/dist/zishrink.awk up to 1.1.1.7 external/public-domain/tz/dist/zone.tab up to 1.1.1.18 external/public-domain/tz/dist/zone1970.tab up to 1.1.1.20 external/public-domain/tz/dist/zoneinfo2tdf.pl up to 1.1.1.4 distrib/sets/lists/base/mi (apply patch) doc/3RDPARTY (apply patch) external/public-domain/tz/share/zoneinfo/Makefile (apply patch) Update tzdate from 2018i to 2020d @ text @d89 1 a89 1 # https://web.archive.org/web/20160517155308/http://www.clpgh.org/exhibit/dst.html d96 4 a99 27 # From Paul Eggert (2019-06-04): # Here is the legal basis for the US federal rules. # * Public Law 65-106 (1918-03-19) implemented standard and daylight saving # time for the first time across the US, springing forward on March's last # Sunday and falling back on October's last Sunday. # https://www.loc.gov/law/help/statutes-at-large/65th-congress/session-2/c65s2ch24.pdf # * Public Law 66-40 (1919-08-20) repealed DST on October 1919's last Sunday. # https://www.loc.gov/law/help/statutes-at-large/66th-congress/session-1/c66s1ch51.pdf # * Public Law 77-403 (1942-01-20) started wartime DST on 1942-02-09. # https://www.loc.gov/law/help/statutes-at-large/77th-congress/session-2/c77s2ch7.pdf # * Public Law 79-187 (1945-09-25) ended wartime DST on 1945-09-30. # https://www.loc.gov/law/help/statutes-at-large/79th-congress/session-1/c79s1ch388.pdf # * Public Law 89-387 (1966-04-13) reinstituted a national standard for DST, # from April's last Sunday to October's last Sunday, effective 1967. # https://www.govinfo.gov/content/pkg/STATUTE-80/pdf/STATUTE-80-Pg107.pdf # * Public Law 93-182 (1973-12-15) moved the 1974 spring-forward to 01-06. # https://www.govinfo.gov/content/pkg/STATUTE-87/pdf/STATUTE-87-Pg707.pdf # * Public Law 93-434 (1974-10-05) moved the 1975 spring-forward to # February's last Sunday. # https://www.govinfo.gov/content/pkg/STATUTE-88/pdf/STATUTE-88-Pg1209.pdf # * Public Law 99-359 (1986-07-08) moved the spring-forward to April's first # Sunday. # https://www.govinfo.gov/content/pkg/STATUTE-100/pdf/STATUTE-100-Pg764.pdf # * Public Law 109-58 (2005-08-08), effective 2007, moved the spring-forward # to March's second Sunday and the fall-back to November's first Sunday. # https://www.govinfo.gov/content/pkg/PLAW-109publ58/pdf/PLAW-109publ58.pdf # All transitions are at 02:00 local time. d150 1 a150 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d155 1 a155 1 Rule US 1945 only - Sep 30 2:00 0 S d159 1 a159 1 Rule US 1975 only - Feb lastSun 2:00 1:00 D d176 1 a176 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d327 1 a327 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d333 1 a333 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d386 1 a386 26 # From Paul Eggert (2015-04-06): # In 1950s Nashville a public clock had dueling faces, one for conservatives # and the other for liberals; the two sides didn't agree about the time of day. # I haven't found a photo of this clock, nor have I tracked down the TIME # magazine report cited below, but here's the story as told by the late # American journalist John Seigenthaler, who was there: # # "The two [newspaper] owners held strongly contrasting political and # ideological views. Evans was a New South liberal, Stahlman an Old South # conservative, and their two papers frequently clashed editorially, often on # the same day.... In the 1950s as the state legislature was grappling with # the question of whether to approve daylight saving time for the entire state, # TIME magazine reported: # # "'The Nashville Banner and The Nashville Tennessean rarely agree on anything # but the time of day - and last week they couldn't agree on that.' # # "It was all too true. The clock on the front of the building had two faces - # The Tennessean side of the building facing west, the other, east. When it # was high noon Banner time, it was 11 a.m. Tennessean time." # # Seigenthaler J. For 100 years, Tennessean had it covered. # The Tennessean 2007-05-11, republished 2015-04-06. # https://www.tennessean.com/story/insider/extras/2015/04/06/archives-seigenthaler-for-100-years-the-tennessean-had-it-covered/25348545/ # Rule NAME FROM TO - IN ON AT SAVE LETTER d393 1 a393 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d455 1 a455 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d461 1 a461 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d508 1 a508 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d514 1 a514 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] a611 9 # # From Ryan Stanley (2019-01-11): # The community will be changing back on the 20th of this month... # From Tim Parenti (2019-01-11): # Per an announcement on the Metlakatla community's official Facebook page, the # "fall back" will be on Sunday 2019-01-20 at 02:00: # https://www.facebook.com/141055983004923/photos/607150969728753/ # So they won't be waiting for Alaska to join them on 2019-03-10, but will # rather change their clocks twice in seven weeks. d613 1 a613 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d640 1 a640 1 -8:00 - PST 2019 Jan 20 2:00 d733 1 a733 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d763 1 a763 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d789 1 a789 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d857 1 a857 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d861 1 a861 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d876 1 a876 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d881 1 a881 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d895 1 a895 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d905 1 a905 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d916 5 a920 5 # From Alois Triendl (2019-07-09): # The Indianapolis News, Friday 27 October 1967 states that Perry County # returned to CST. It went again to EST on 27 April 1969, as documented by the # Indianapolis star of Saturday 26 April. # Rule NAME FROM TO - IN ON AT SAVE LETTER a921 1 Rule Perry 1955 1960 - Sep lastSun 2:00 0 S d923 4 a926 2 Rule Perry 1961 1963 - Oct lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] d930 1 a930 2 -5:00 - EST 1967 Oct 29 2:00 -6:00 US C%sT 1969 Apr 27 2:00 d937 1 a937 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d942 1 a942 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d958 1 a958 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d964 1 a964 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d975 1 a975 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d980 1 a980 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d991 1 a991 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] a1005 9 # From Michael Deckers (2019-08-06): # From the contemporary source given by Alois Treindl, # the switch in Louisville on 1946-04-28 was on 00:01 # From Paul Eggert (2019-08-26): # That source was the Louisville Courier-Journal, 1946-04-27, p 4. # Shanks gives 02:00 for all 20th-century transition times in Louisville. # Evidently this is wrong for spring 1946. Although also likely wrong # for other dates, we have no data. # d1008 1 a1008 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d1011 1 a1011 1 Rule Louisville 1941 only - Apr lastSun 2:00 1:00 D a1012 1 Rule Louisville 1946 only - Apr lastSun 0:01 1:00 D a1013 1 Rule Louisville 1950 1961 - Apr lastSun 2:00 1:00 D d1015 2 a1016 2 Rule Louisville 1956 1961 - Oct lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] d1105 12 a1116 13 # From Paul Eggert (2019-07-06): # Due to a complicated set of legal maneuvers, in 1967 Michigan did # not start daylight saving time when the rest of the US did. # Instead, it began DST on Jun 14 at 00:01. This was big news: # the Detroit Free Press reported it at the top of Page 1 on # 1967-06-14, in an article "State Adjusting to Switch to Fast Time" # by Gary Blonston, above an article about Thurgood Marshall's # confirmation to the US Supreme Court. Although Shanks says Detroit # observed DST until 1967-10-29 00:01, that time of day seems to be # incorrect, as the Free Press later said DST ended in Michigan at the # same time as the rest of the US. Also, although Shanks reports no DST in # Detroit in 1968, it did observe DST that year; in the November 1968 # election Michigan voters narrowly repealed DST, effective 1969. d1119 1 a1119 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d1122 1 a1122 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d1127 1 a1127 3 -5:00 Detroit E%sT 1967 Jun 14 0:01 -5:00 US E%sT 1969 -5:00 - EST 1973 d1134 1 a1134 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d1139 1 a1139 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] a1175 6 # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 # . # # Pearce C. The Great Daylight Saving Time Controversy. # Australian Ebook Publisher. 2017. ISBN 978-1-925516-96-8. # d1184 3 d1301 1 a1301 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d1324 1 a1324 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d1373 1 a1373 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d1386 1 a1386 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d1399 1 a1399 2 # west Labrador, Nova Scotia, Prince Edward I, # Îles-de-la-Madeleine, Listuguj reserve d1418 1 a1418 8 # From Jeffery Nichols (2020-01-09): # America/Halifax ... also applies to Îles-de-la-Madeleine and the Listuguj # reserve in Quebec. Officially, this came into effect on January 1, 2007 # (Legal Time Act, CQLR c T-5.1), but the legislative debates surrounding that # bill say that it is "accommodating the customs and practices" of those # regions, which suggests that they have always been in-line with Halifax. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d1460 1 a1460 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d1484 1 a1484 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d1498 1 a1498 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d1511 1 a1511 1 # From Paul Eggert (2020-01-10): a1512 1 # See America/Halifax for the Îles de la Madeleine and the Listuguj reserve. d1519 1 a1519 1 # https://www.justice.gouv.qc.ca/en/department/ministre/functions-and-responsabilities/legal-time-in-quebec/the-situation-in-minganie-and-basse-cote-nord/ d1522 2 a1523 2 # This common practice was codified into law as of 2007; see Legal Time Act, # CQLR c T-5.1 . d1527 1 a1527 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] a1541 9 # From Jeffery Nichols (2020-02-06): # According to the [Shanks] atlas, those western Ontario zones are huge, # covering most of Ontario northwest of Sault Ste Marie and Timmins. # The zones seem to include towns bigger than the ones they're named after, # like Dryden in America/Rainy_River and Wawa (and maybe Attawapiskat) in # America/Nipigon. I assume it's too much trouble to change the name of the # zone (like when you found out that America/Glace_Bay includes Sydney, Nova # Scotia).... d1683 1 a1683 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d1695 13 a1707 4 Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S d1740 1 a1740 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d1790 1 a1790 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d1815 1 a1815 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] a1836 6 # From Paul Eggert (2019-07-25): # Pearce's book says Regina observed DST in 1914-1917. No dates and times, # unfortunately. It also says that in 1914 Saskatoon observed DST # from 1 June to 6 July, and that DST was also tried out in Davidson, # Melfort, and Prince Albert. d1875 1 a1875 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d1899 1 a1899 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d1912 1 a1912 14 # From Alois Triendl (2019-07-19): # There was no DST in Alberta in 1967... Calgary Herald, 29 April 1967. # 1969, no DST, from Edmonton Journal 18 April 1969 # # From Paul Eggert (2019-07-25): # Pearce's book says that Alberta's 1948 Daylight Saving Act required # Mountain Standard Time without DST, and that "anyone who broke that law # could be fined up to $25 and costs". There seems to be no record of # anybody paying the fine. The law was not changed until an August 1971 # plebiscite reinstituted DST in 1972. This story is also mentioned in: # Boyer JP. Forcing Choice: The Risky Reward of Referendums. Dundum. 2017. # ISBN 978-1459739123. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d1924 4 d1930 1 a1930 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2010 1 a2010 1 # From Paul Eggert (2019-07-25): a2011 12 # Alois Triendl confirmed this on 07-22, citing the 1946-04-27 Vancouver Daily # Province. He also cited the 1946-09-28 Victoria Daily Times, which said # that Vancouver, Victoria, etc. "change at midnight Saturday"; for now, # guess they meant 02:00 Sunday since 02:00 was common practice in Vancouver. # # Early Vancouver, Volume Four, by Major J.S. Matthews, V.D., 2011 edition # says that a 1922 plebiscite adopted DST, but a 1923 plebiscite rejected it. # http://former.vancouver.ca/ctyclerk/archives/digitized/EarlyVan/SearchEarlyVan/Vol4pdf/MatthewsEarlyVancouverVol4_DaylightSavings.pdf # A catalog entry for a newspaper clipping seems to indicate that Vancouver # observed DST in 1941 from 07-07 through 09-27; see # https://searcharchives.vancouver.ca/daylight-saving-1918-starts-again-july-7-1941-start-d-s-sept-27-end-of-d-s-1941 # We have no further details, so omit them for now. d2013 1 a2013 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d2020 1 a2020 1 Rule Vanc 1946 only - Sep 29 2:00 0 S d2023 1 a2023 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2094 1 a2094 1 # [no online source found] d2127 1 a2127 1 # [no online source found] d2330 1 a2330 25 # From Tim Parenti (2020-03-05): # The government of Yukon announced [yesterday] the cessation of seasonal time # changes. "After clocks are pushed ahead one hour on March 8, the territory # will remain on [UTC-07]. ... [The government] found 93 per cent of # respondents wanted to end seasonal time changes and, of that group, 70 per # cent wanted 'permanent Pacific Daylight Saving Time.'" # https://www.cbc.ca/news/canada/north/yukon-end-daylight-saving-time-1.5486358 # # Although the government press release prefers PDT, we prefer MST for # consistency with nearby Dawson Creek, Creston, and Fort Nelson. # https://yukon.ca/en/news/yukon-end-seasonal-time-change # From Andrew G. Smith (2020-09-24): # Yukon has completed its regulatory change to be on UTC -7 year-round.... # http://www.gov.yk.ca/legislation/regs/oic2020_125.pdf # What we have done is re-defined Yukon Standard Time, as we are # authorized to do under section 33 of our Interpretation Act: # http://www.gov.yk.ca/legislation/acts/interpretation_c.pdf # # From Paul Eggert (2020-09-24): # tzdb uses the obsolete YST abbreviation for standard time in Yukon through # about 1970, and uses PST for standard time in Yukon since then. Consistent # with that, use MST for -07, the new standard time in Yukon effective Nov. 1. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d2343 1 a2343 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2384 1 a2384 2 -8:00 Canada P%sT 2020 Nov 1 -7:00 - MST d2388 1 a2388 2 -8:00 Canada P%sT 2020 Nov 1 -7:00 - MST d2490 1 a2490 1 # https://www.latimes.com/archives/la-xpm-2001-mar-03-mn-32561-story.html d2602 1 a2602 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d2617 1 a2617 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2807 1 a2807 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d2810 1 a2810 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2819 1 a2819 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d2825 1 a2825 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2832 1 a2832 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d2839 1 a2839 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2856 1 a2856 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2869 1 a2869 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d2878 1 a2878 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3043 1 a3043 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d3084 1 a3084 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3112 1 a3112 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d3119 1 a3119 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3129 1 a3129 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d3134 1 a3134 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3158 1 a3158 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d3167 1 a3167 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3239 1 a3239 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d3253 1 a3253 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3287 1 a3287 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d3292 1 a3292 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3313 1 a3313 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3321 1 a3321 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3378 1 a3378 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d3385 1 a3385 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3397 1 a3397 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3405 1 a3405 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3417 1 a3417 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3463 1 a3463 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] @ 1.1.1.16.4.8 log @Pull up the following, requested by kre in ticket #1676: external/public-domain/tz/dist/Makefile up to 1.1.1.30 external/public-domain/tz/dist/NEWS up to 1.1.1.34 external/public-domain/tz/dist/TZDATA_VERSION up to 1.24 external/public-domain/tz/dist/africa up to 1.1.1.25 external/public-domain/tz/dist/asia up to 1.1.1.28 external/public-domain/tz/dist/australasia up to 1.1.1.21 external/public-domain/tz/dist/backward up to 1.1.1.12 external/public-domain/tz/dist/backzone up to 1.1.1.20 external/public-domain/tz/dist/etcetera up to 1.1.1.5 external/public-domain/tz/dist/europe up to 1.1.1.30 external/public-domain/tz/dist/leap-seconds.list up to 1.1.1.15 external/public-domain/tz/dist/leapseconds up to 1.1.1.18 external/public-domain/tz/dist/leapseconds.awk up to 1.1.1.12 external/public-domain/tz/dist/northamerica up to 1.1.1.27 external/public-domain/tz/dist/theory.html up to 1.1.1.12 external/public-domain/tz/dist/version up to 1.1.1.21 external/public-domain/tz/dist/ziguard.awk up to 1.1.1.6 external/public-domain/tz/dist/zone.tab up to 1.1.1.19 external/public-domain/tz/dist/zone1970.tab up to 1.1.1.21 doc/3RDPARTY (apply patch) Update from tzdata2020d to tzdata2021a. The significant changes are: Volgograd switched to Moscow time on 2020-12-27 at 02:00. (2020e) South Sudan changes from +03 to +02 on 2021-02-01 at 00:00. (2021a) @ text @d2237 1 a2237 1 # https://mm.icann.org/pipermail/tz/attachments/20201125/d5adc93b/CAYTOIC1980-02DST1980-01-04-0001.pdf a2937 21 # From P Chan (2020-11-27, corrected on 2020-12-02): # There were two periods of DST observed in 1942-1945: 1942-05-01 # midnight to 1944-12-31 midnight and 1945-02-01 to 1945-10-17 midnight. # "midnight" should mean 24:00 from the context. # # War Time Order 1942 [1942-05-01] and War Time (No. 2) Order 1942 [1942-09-29] # Appendix to the Statutes of 7 George VI. and the Year 1942. p 34, 43 # https://books.google.com/books?id=5rlNAQAAIAAJ&pg=RA3-PA34 # https://books.google.com/books?id=5rlNAQAAIAAJ&pg=RA3-PA43 # # War Time Order 1943 [1943-03-31] and War Time Order 1944 [1943-12-29] # Appendix to the Statutes of 8 George VI. and the Year 1943. p 9-10, 28-29 # https://books.google.com/books?id=5rlNAQAAIAAJ&pg=RA4-PA9 # https://books.google.com/books?id=5rlNAQAAIAAJ&pg=RA4-PA28 # # War Time Order 1945 [1945-01-31] and the Order which revoke War Time Order # 1945 [1945-10-16] Appendix to the Statutes of 9 George VI. and the Year # 1945. p 160, 247-248 # https://books.google.com/books?id=5rlNAQAAIAAJ&pg=RA6-PA160 # https://books.google.com/books?id=5rlNAQAAIAAJ&pg=RA6-PA247 # a2943 5 Rule Bahamas 1942 only - May 1 24:00 1:00 W Rule Bahamas 1944 only - Dec 31 24:00 0 S Rule Bahamas 1945 only - Feb 1 0:00 1:00 W Rule Bahamas 1945 only - Aug 14 23:00u 1:00 P # Peace Rule Bahamas 1945 only - Oct 17 24:00 0 S d2967 1 a2967 36 # From P Chan (2020-11-03): # Below are some laws related to the time in British Honduras/Belize: # # Definition of Time Ordinance, 1927 (No.4 of 1927) [1927-04-01] # Ordinances of British Honduras Passed in the Year 1927, p 19-20 # https://books.google.com/books?id=LqEpAQAAMAAJ&pg=RA3-PA19 # # Definition of Time (Amendment) Ordinance, 1942 (No. 5 of 1942) [1942-06-27] # Ordinances of British Honduras Passed in the Year 1942, p 31-32 # https://books.google.com/books?id=h6MpAQAAMAAJ&pg=RA6-PA95-IA44 # # Definition of Time Ordinance, 1945 (No. 19 of 1945) [1945-12-15] # Ordinances of British Honduras Passed in the Year 1945, p 49-50 # https://books.google.com/books?id=xaMpAQAAMAAJ&pg=RA2-PP1 # # Definition of Time Ordinance, 1947 (No. 1 of 1947) [1947-03-11] # Ordinances of British Honduras Passed in the Year 1947, p 1-2 # https://books.google.com/books?id=xaMpAQAAMAAJ&pg=RA3-PA1 # # Time (Definition of) Ordinance (Chapter 180) # The Laws of British Honduras in Force on the 15th Day of September, 1958 , Volume IV, p 2580 # https://books.google.com/books?id=v5QpAQAAMAAJ&pg=PA2580 # # Time (Definition of) (Amendment) Ordinance, 1968 (No. 13 of 1968) [1968-08-03] # https://books.google.com/books?id=xij7KEB_58wC&pg=RA1-PA428-IA9 # # Definition of Time Act (Chapter 339) # Law of Belize, Revised Edition 2000 # http://www.belizelaw.org/web/lawadmin/PDF%20files/cap339.pdf # From Paul Eggert (2020-11-03): # The transitions below are derived from P Chan's sources, except that the # 1973 through 1983 transitions are from Shanks & Pottenger since we have # no better data there. d2969 2 a2970 7 Rule Belize 1918 1941 - Oct Sat>=1 24:00 0:30 -0530 Rule Belize 1919 1942 - Feb Sat>=8 24:00 0 CST Rule Belize 1942 only - Jun 27 24:00 1:00 CWT Rule Belize 1945 only - Aug 14 23:00u 1:00 CPT Rule Belize 1945 only - Dec 15 24:00 0 CST Rule Belize 1947 1967 - Oct Sat>=1 24:00 0:30 -0530 Rule Belize 1948 1968 - Feb Sat>=8 24:00 0 CST d2976 1 a2976 1 Zone America/Belize -5:52:48 - LMT 1912 Apr 1 a2980 1 # From Paul Eggert (2020-11-24): d2982 1 a2982 69 # Bermuda dockyard, Ireland I. This agrees with standard offset given in the # Daylight Saving Act, 1917 cited below. Round that to the nearest second. # It is not known when this time became standard for Bermuda; guess 1890. # The transition to -04 was specified by: # 1930: The Time Zone Act, 1929 (1929: No. 39) [1929-11-08] # https://books.google.com/books?id=7tdMAQAAIAAJ&pg=RA54-PP1 # From P Chan (2020-11-20): # Most of the information can be found online from the Bermuda National # Library - Digital Collection which includes The Royal Gazette (RG) until 1957 # https://bnl.contentdm.oclc.org/digital/ # I will cite the ID. For example, [10000] means # https://bnl.contentdm.oclc.org/digital/collection/BermudaNP02/id/10000 # # 1917: Apr 5 midnight to Sep 30 midnight # Daylight Saving Act, 1917 (1917 No. 13) [1917-04-02] # Bermuda Acts and Resolves 1917, p 37-38 # https://books.google.com/books?id=M-lCAQAAMAAJ&pg=PA36-IA2 # RG, 1917-04-04, p 6 [42340] gives the spring forward date. # # 1918: Apr 13 midnight to Sep 15 midnight # Daylight Saving Act, 1918 (1918 No. 9) [1918-04-06] # Bermuda Acts and Resolves 1917, p 13 # https://books.google.com/books?id=K-lCAQAAMAAJ&pg=RA1-PA7 # # Note that local mean time was still used before 1930. # # During WWII, DST was introduced by Defence Regulations # 1942: Jan 11 02:00 to Oct 18 02:00 [113646], [115726] # 1943: Mar 21 02:00 to Oct 31 02:00 [116704], [118193] # 1944: Mar 12 02:00 to Nov 5 02:00 [119225], [121593] # 1945: Mar 11 02:00 to Nov 4 02:00 [122369], [124461] # RG, 1942-01-08, p 2, 1942-10-12, p 2 , 1943-03-06, p 2, 1943-09-03, p 1, # 1944-02-29, p 6, 1944-09-20, p 2, 1945-02-13, p 2, 1945-11-03, p 1 # # In 1946, the House of Assembly rejected DST twice. [128686], [128076] # RG, 1946-03-16 p 1,1946-04-13 p 1 # # 1947: third Sunday in May 02:00 to second Sunday in September 02:00 # DST in 1947 was defined in the Daylight Saving Act, 1947 (1947: No. 12) # which expired at the end of the year. [125784] ,[132405], [144454], [138226] # RG, 1947-02-27, p 1, 1947-05-15, p 1, 1947-09-13, p 1, 1947-12-30, p 1 # # 1948-1952: fourth Sunday in May 02:00 to first Sunday in September 02:00 # DST in 1948 was defined in the Daylight Saving Act, 1948 (1948 : No. 12) # which was set to expired at the end of the year but it was extended until # the end of 1952 and was not further extended. # [129802], [139403], [146008], [135240], [144330], [139049], [143309], # [148271], [149773], [153589], [153802], [155924] # RG, 1948-04-13, p 1, 1948-05-22, p 1, 1948-09-04, p 1, 1949-05-21, p1, # 1949-09-03, p 1, 1950-05-27 p 1, 1950-09-02, p 1, 1951-05-27, p 1, # 1951-09-01, p 1, 1952-05-23, p 1, 1952-09-26, p 1, 1952-12-21, p 8 # # In 1953-1955, the House of Assembly rejected DST each year. [158996], # [162620], [166720] RG, 1953-05-02, p 1, 1954-04-01 p 1, 1955-03-12, p 1 # # 1956: fourth Sunday in May 02:00 to last Sunday in October 02:00 # Time Zone (Seasonal Variation) Act, 1956 (1956: No.44) [1956-05-25] # Bermuda Public Acts 1956, p 331-332 # https://books.google.com/books?id=Xs1AlmD_cEwC&pg=PA63 # # The extension of the Act was rejected by the House of Assembly. [176218] # RG, 1956-12-13, p 1 # # From the Chronological Table of Public and Private Acts up to 1985, it seems # that there does not exist other Acts related to DST before 1973. # https://books.google.com/books?id=r9hMAQAAIAAJ&pg=RA23-PA1 # Public Acts of the Legislature of the Islands of Bermuda, Together with # Statutory Instruments in Force Thereunder, Vol VII d2985 1 a2991 18 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Bermuda 1917 only - Apr 5 24:00 1:00 - Rule Bermuda 1917 only - Sep 30 24:00 0 - Rule Bermuda 1918 only - Apr 13 24:00 1:00 - Rule Bermuda 1918 only - Sep 15 24:00 0 S Rule Bermuda 1942 only - Jan 11 2:00 1:00 D Rule Bermuda 1942 only - Oct 18 2:00 0 S Rule Bermuda 1943 only - Mar 21 2:00 1:00 D Rule Bermuda 1943 only - Oct 31 2:00 0 S Rule Bermuda 1944 1945 - Mar Sun>=8 2:00 1:00 D Rule Bermuda 1944 1945 - Nov Sun>=1 2:00 0 S Rule Bermuda 1947 only - May Sun>=15 2:00 1:00 D Rule Bermuda 1947 only - Sep Sun>=8 2:00 0 S Rule Bermuda 1948 1952 - May Sun>=22 2:00 1:00 D Rule Bermuda 1948 1952 - Sep Sun>=1 2:00 0 S Rule Bermuda 1956 only - May Sun>=22 2:00 1:00 D Rule Bermuda 1956 only - Oct lastSun 2:00 0 S d2993 2 a2994 3 Zone Atlantic/Bermuda -4:19:18 - LMT 1890 # Hamilton -4:19:18 Bermuda BMT/BST 1930 Jan 1 2:00 -4:00 Bermuda A%sT 1974 Apr 28 2:00 d3577 1 a3577 1 d3592 1 a3598 24 # From P Chan (2020-11-27): # Standard Time Declaration Order 2015 (L.N. 15/2015) # http://online.fliphtml5.com/fizd/czin/#p=2 # # Standard Time Declaration Order 2017 (L.N. 31/2017) # http://online.fliphtml5.com/fizd/dmcu/#p=2 # # From Tim Parenti (2020-12-05): # Although L.N. 31/2017 reads that it "shall come into operation at 2:00 a.m. # on 11th March 2018", a precise interpretation here poses some problems. The # order states that "the standard time to be observed throughout the Turks and # Caicos Islands shall be the same time zone as the Eastern United States of # America" and further clarifies "[f]or the avoidance of doubt" that it # "applies to the Eastern Standard Time as well as any changes thereto for # Daylight Saving Time." However, as clocks in Turks and Caicos approached # 02:00 -04, and thus the declared implementation time, it was still 01:00 EST # (-05), as DST in the Eastern US would not start until an hour later. # # Since it is unlikely that those on the islands switched their clocks twice in # the span of an hour, we assume instead that the adoption of EDT actually took # effect once clocks in the Eastern US had sprung forward, from 03:00 -04. # This discrepancy only affects the time zone abbreviation and DST flag for the # intervening hour, not wall clock times, as -04 was maintained throughout. d3603 2 a3604 2 -5:00 US E%sT 2015 Mar 8 2:00 -4:00 - AST 2018 Mar 11 3:00 @ 1.1.1.16.4.9 log @Pull up the following revisions (catch up to -current), requested by kre in ticket #1777: external/public-domain/tz/dist/SECURITY up to 1.1.1.1 external/public-domain/tz/dist/CONTRIBUTING up to 1.1.1.7 external/public-domain/tz/dist/Makefile up to 1.1.1.33 external/public-domain/tz/dist/NEWS up to 1.1.1.38 external/public-domain/tz/dist/README up to 1.1.1.10 external/public-domain/tz/dist/TZDATA_VERSION up to 1.30 external/public-domain/tz/dist/africa up to 1.1.1.28 external/public-domain/tz/dist/antarctica up to 1.1.1.15 external/public-domain/tz/dist/asia up to 1.5 external/public-domain/tz/dist/australasia up to 1.5 external/public-domain/tz/dist/backward up to 1.5 external/public-domain/tz/dist/backzone up to 1.1.1.23 external/public-domain/tz/dist/calendars up to 1.1.1.2 external/public-domain/tz/dist/checktab.awk up to 1.1.1.11 external/public-domain/tz/dist/etcetera up to 1.1.1.6 external/public-domain/tz/dist/europe up to 1.1.1.34 external/public-domain/tz/dist/leap-seconds.list up to 1.4 external/public-domain/tz/dist/leapseconds up to 1.4 external/public-domain/tz/dist/northamerica up to 1.1.1.30 external/public-domain/tz/dist/southamerica up to 1.1.1.20 external/public-domain/tz/dist/theory.html up to 1.1.1.15 external/public-domain/tz/dist/version up to 1.5 external/public-domain/tz/dist/ziguard.awk up to 1.1.1.9 external/public-domain/tz/dist/zishrink.awk up to 1.1.1.8 external/public-domain/tz/dist/zone.tab up to 1.1.1.22 external/public-domain/tz/dist/zone1970.tab up to 1.1.1.23 distrib/sets/lists/base/mi (apply patch) doc/3RDPARTY (apply patch) Updata tzdata to 2022e. @ text @d347 2 a348 1 # Eastern time (i.e., -4:56:01.6) just before the 1883 switch. d357 1 a357 2 #STDOFF -4:56:01.6 Zone America/New_York -4:56:02 - LMT 1883 Nov 18 17:00u d442 1 a442 1 Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 18:00u d451 1 a451 1 Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 19:00u d461 1 a461 1 Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 19:00u d478 1 a478 1 Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 19:00u d510 1 a510 1 Zone America/Denver -6:59:56 - LMT 1883 Nov 18 19:00u d563 1 a563 1 Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 20:00u d732 1 a732 5 # The following switches don't make our 1970 cutoff. # # Kiska observed Tokyo date and time during Japanese occupation from # 1942-06-06 to 1943-07-29, and similarly for Attu from 1942-06-07 to # 1943-05-29 (all dates American). Both islands are now uninhabited. d821 1 a821 1 Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 19:00u a827 1 d847 1 a847 1 Zone America/Boise -7:44:49 - LMT 1883 Nov 18 20:00u d919 1 a919 1 Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 18:00u d939 1 a939 1 Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 18:00u d963 1 a963 1 Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 18:00u d973 1 a973 1 # From Alois Treindl (2019-07-09): d983 1 a983 1 Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 18:00u d1000 1 a1000 1 Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 18:00u d1022 1 a1022 1 Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 18:00u d1038 1 a1038 1 Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 18:00u d1049 1 a1049 1 Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 18:00u d1085 1 a1085 1 Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 18:00u d1119 1 a1119 1 Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 18:00u d1594 1 d1596 14 d1652 48 a1844 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] a1849 1 #PACKRATLIST zone.tab Link America/Atikokan America/Coral_Harbour d2001 1 a2001 1 # From Alois Treindl (2019-07-19): d2040 54 d2110 1 a2110 1 # Alois Treindl confirmed this on 07-22, citing the 1946-04-27 Vancouver Daily a2146 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] a2738 2 Rule Mexico 1931 only - May 1 23:00 1:00 D Rule Mexico 1931 only - Oct 1 0:00 0 S d2755 1 a2755 1 Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 6:00u d2761 1 a2761 1 Zone America/Merida -5:58:28 - LMT 1922 Jan 1 6:00u d2775 1 a2775 1 Zone America/Matamoros -6:30:00 - LMT 1922 Jan 1 6:00u d2781 1 a2781 1 Zone America/Monterrey -6:41:16 - LMT 1922 Jan 1 6:00u d2786 1 a2786 1 Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 7:00u d2789 3 a2791 1 -7:00 Mexico M%sT 1932 Apr 1 d2799 1 a2799 1 Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 7:00u d2802 3 a2804 1 -7:00 Mexico M%sT 1932 Apr 1 d2811 1 a2811 1 Zone America/Chihuahua -7:04:20 - LMT 1922 Jan 1 7:00u d2814 3 a2816 1 -7:00 Mexico M%sT 1932 Apr 1 d2822 1 a2822 1 Zone America/Hermosillo -7:23:52 - LMT 1922 Jan 1 7:00u d2825 3 a2827 1 -7:00 Mexico M%sT 1932 Apr 1 d2862 1 a2862 1 Zone America/Mazatlan -7:05:40 - LMT 1922 Jan 1 7:00u d2865 3 a2867 1 -7:00 Mexico M%sT 1932 Apr 1 d2874 1 a2874 1 Zone America/Bahia_Banderas -7:01:00 - LMT 1922 Jan 1 7:00u d2877 3 a2879 1 -7:00 Mexico M%sT 1932 Apr 1 d2887 1 a2887 1 Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 7:00u a2930 4 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Anguilla -4:12:16 - LMT 1912 Mar 2 -4:00 - AST d2932 1 a2932 4 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Antigua -4:07:12 - LMT 1912 Mar 2 -5:00 - EST 1951 -4:00 - AST d2934 29 a2963 1 # The Bahamas a2971 1 d2979 1 a2979 1 # For 1899 Milne gives -3:58:29.2. d2981 1 a2981 36 # From P Chan (2020-12-09 and 2020-12-11): # Standard time of GMT-4 was adopted in 1911. # Definition of Time Act, 1911 (1911-7) [1911-08-28] # 1912, Laws of Barbados (5 v.), OCLC Number: 919801291, Vol. 4, Image No. 522 # 1944, Laws of Barbados (5 v.), OCLC Number: 84548697, Vol. 4, Image No. 122 # http://llmc.com/browse.aspx?type=2&coll=85&div=297 # # DST was observed in 1942-44. # Defence (Daylight Saving) Regulations, 1942, 1942-04-13 # Defence (Daylight Saving) (Repeal) Regulations, 1942, 1942-08-22 # Defence (Daylight Saving) Regulations, 1943, 1943-04-16 # Defence (Daylight Saving) (Repeal) Regulations, 1943, 1943-09-01 # Defence (Daylight Saving) Regulations, 1944, 1944-03-21 # [Defence (Daylight Saving) (Amendment) Regulations 1944, 1944-03-28] # Defence (Daylight Saving) (Repeal) Regulations, 1944, 1944-08-30 # # 1914-, Subsidiary Legis., Annual Vols. OCLC Number: 226290591 # 1942: Image Nos. 527-528, 555-556 # 1943: Image Nos. 178-179, 198 # 1944: Image Nos. 113-115, 129 # http://llmc.com/titledescfull.aspx?type=2&coll=85&div=297&set=98437 # # From Tim Parenti (2021-02-20): # The transitions below are derived from P Chan's sources, except that the 1977 # through 1980 transitions are from Shanks & Pottenger since we have no better # data there. Of particular note, the 1944 DST regulation only advanced the # time to "exactly three and a half hours later than Greenwich mean time", as # opposed to "three hours" in the 1942 and 1943 regulations. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Barb 1942 only - Apr 19 5:00u 1:00 D Rule Barb 1942 only - Aug 31 6:00u 0 S Rule Barb 1943 only - May 2 5:00u 1:00 D Rule Barb 1943 only - Sep 5 6:00u 0 S Rule Barb 1944 only - Apr 10 5:00u 0:30 - Rule Barb 1944 only - Sep 10 6:00u 0 S d2988 2 a2989 4 #STDOFF -3:58:29.2 Zone America/Barbados -3:58:29 - LMT 1911 Aug 28 # Bridgetown -4:00 Barb A%sT 1944 -4:00 Barb AST/-0330 1945 d3047 1 a3047 1 # From Paul Eggert (2022-07-27): d3050 1 a3050 1 # Daylight Saving Act, 1917 cited below. a3144 1 #STDOFF -4:19:18.3 a3150 3 # Caribbean Netherlands # See America/Kralendijk in southamerica. d3152 1 a3152 4 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown -5:07:10 - KMT 1912 Feb # Kingston Mean Time -5:00 - EST d3156 1 a3156 1 # Milne gives -5:36:13.3 as San José mean time. a3167 1 #STDOFF -5:36:13.3 d3379 1 a3379 4 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau -4:00 - AST a3427 4 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Grenada -4:07:00 - LMT 1911 Jul # St George's -4:00 - AST a3428 4 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe-à-Pitre -4:00 - AST a3429 1 # See America/St_Barthelemy in southamerica. d3431 1 a3431 1 # See America/Marigot in southamerica. d3590 1 a3590 1 # island". Go with Milne. a3602 1 #STDOFF -5:07:10.41 d3618 1 a3618 4 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Cork Hill -4:00 - AST d3690 1 a3700 4 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre -4:00 - AST d3702 1 a3702 5 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/St_Lucia -4:04:00 - LMT 1890 # Castries -4:04:00 - CMT 1912 # Castries Mean Time -4:00 - AST d3713 1 a3713 8 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown -4:04:56 - KMT 1912 # Kingstown Mean Time -4:00 - AST # Sint Maarten # See America/Lower_Princes in southamerica. a3776 1 #STDOFF -5:07:10.41 d3784 2 a3785 9 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town -4:00 - AST # US Virgin Is # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie -4:00 - AST @ 1.1.1.16.4.10 log @Pull up the following, requested by kry in ticket #1928: external/public-domain/tz/dist/checknow.awk up to 1.1.1.1 external/public-domain/tz/dist/zonenow.tab up to 1.1.1.1 external/public-domain/tz/dist/CONTRIBUTING up to 1.1.1.8 external/public-domain/tz/dist/Makefile up to 1.1.1.37 external/public-domain/tz/dist/NEWS up to 1.1.1.44 external/public-domain/tz/dist/README up to 1.1.1.11 external/public-domain/tz/dist/TZDATA_VERSION up to 1.36 external/public-domain/tz/dist/africa up to 1.1.1.32 external/public-domain/tz/dist/antarctica up to 1.1.1.18 external/public-domain/tz/dist/asia up to 1.11 external/public-domain/tz/dist/australasia up to 1.8 external/public-domain/tz/dist/backward up to 1.11 external/public-domain/tz/dist/backzone up to 1.1.1.27 external/public-domain/tz/dist/checklinks.awk up to 1.1.1.4 external/public-domain/tz/dist/checktab.awk up to 1.1.1.13 external/public-domain/tz/dist/etcetera up to 1.1.1.7 external/public-domain/tz/dist/europe up to 1.1.1.38 external/public-domain/tz/dist/iso3166.tab up to 1.1.1.9 external/public-domain/tz/dist/leap-seconds.list up to 1.6 external/public-domain/tz/dist/leapseconds up to 1.6 external/public-domain/tz/dist/leapseconds.awk up to 1.1.1.13 external/public-domain/tz/dist/northamerica up to 1.1.1.34 external/public-domain/tz/dist/southamerica up to 1.1.1.24 external/public-domain/tz/dist/theory.html up to 1.1.1.18 external/public-domain/tz/dist/version up to 1.11 external/public-domain/tz/dist/ziguard.awk up to 1.1.1.10 external/public-domain/tz/dist/zone.tab up to 1.1.1.26 external/public-domain/tz/dist/zone1970.tab up to 1.1.1.27 distrib/sets/lists/base/mi (apply patch) doc/3RDPARTY (apply patch) Update tzdata to tzdata2023dgtz. @ text @d279 2 a280 2 # From Paul Eggert (2023-01-23), from a 2001-01-08 heads-up from Rives McDow: # Public law 106-564 (2000-12-23) introduced "Chamorro standard time" a281 1 # Also see 15 U.S.C. §263 . d598 1 a598 1 # One opinion of the early 1980s turmoil in Alaska over time zones and a669 4 # From Paul Eggert (2023-01-23): # America/Adak is for the Aleutian Islands that are part of Alaska # and are west of 169.5° W. d1451 1 a1451 1 # St John's has an apostrophe, but POSIX file names can't have apostrophes. a1598 1 # See America/Toronto for most of Quebec, including Montreal. a1599 1 # See America/Puerto_Rico for east of Natashquan. d1607 17 d1644 11 d1662 4 a1665 2 # ... I don't know if Windsor began observing DST when Detroit did, # or in 1974, or on some other date. d1747 17 d1772 15 a2044 31 # From Chris Walton (2022-11-06): # Whitehorse Star - Thursday April 22, 1965 - page 1 # title: DST Starts Monday ... # https://www.newspapers.com/image/578587481/ # The title of this first article is wrong and/or misleading. # Also, the start time shown in the article is vague; it simply says "after # midnight" when it probably should have stated 2:00a.m.... # # Whitehorse Star - Monday October 25, 1965 - page 15 ... # https://www.newspapers.com/image/578589147/ # The 1965 Yukon Council minutes can be found here: # http://assets.yukonarchives.ca/PER_YG_06_1965_C20_S02_v1.pdf # ... I do not currently believe that NWT touched any of its clocks in 1965.... # # Whitehorse Star - Thursday Feb 24,1966 - page 2 # title: It's Time for YDT ... # https://www.newspapers.com/image/578575979/ ... # America/Whitehorse as a permanent change from UTC-9(YST) to # UTC-8(PST) at 00:00 on Sunday February 27, 1966.... # # Whitehorse Star - Friday April 28,1972 - page 6 # title: Daylight Saving Time for N.W.T.... # https://www.newspapers.com/image/578701610/ ... # Nunavut and NWT zones ... DST starting in 1972.... Start and End ... # should be the same as the rest of Canada # # # From Paul Eggert (2022-11-06): # For now, assume Yukon's 1965-04-22 spring forward was 00:00 -> 02:00, as this # seems likely than 02:00 -> 04:00 and matches "after midnight". a2158 7 # From Chris Walton (2022-11-06): # The 5th edition of the Atlas of Canada contains a time zone map that # shows both legislated and observed time zone boundaries. # All communities on Baffin Island are shown to be observing Eastern time. # The date on the map is 1984. # https://ftp.maps.canada.ca/pub/nrcan_rncan/raster/atlas_5_ed/eng/other/referencemaps/mcr4056.pdf d2163 4 d2171 34 a2204 1 # (1999) reports that ... Coral Harbour does not observe DST. d2363 4 a2366 2 Rule NT_YK 1972 1986 - Apr lastSun 2:00 1:00 D Rule NT_YK 1972 2006 - Oct lastSun 2:00 0 S a2367 2 Rule Yukon 1965 only - Apr lastSun 0:00 2:00 DD Rule Yukon 1965 only - Oct lastSun 2:00 0 S d2369 6 d2399 3 d2407 2 a2408 3 -9:00 NT_YK Y%sT 1965 -9:00 Yukon Y%sT 1966 Feb 27 0:00 -8:00 - PST 1980 d2412 2 a2413 3 -9:00 NT_YK Y%sT 1965 -9:00 Yukon Y%sT 1973 Oct 28 0:00 -8:00 - PST 1980 a2628 14 # From Paul Eggert (2022-10-28): # The new Mexican law was published today: # https://www.dof.gob.mx/nota_detalle.php?codigo=5670045&fecha=28/10/2022 # This abolishes DST except where US DST rules are observed, # and in addition changes all of Chihuahua to -06 with no DST. # From Heitor David Pinto (2022-11-28): # Now the northern [municipios] want to have the same time zone as the # respective neighboring cities in the US, for example Juárez in UTC-7 with # DST, matching El Paso, and Ojinaga in UTC-6 with DST, matching Presidio.... # the president authorized the publication of the decree for November 29, # so the time change would occur on November 30 at 0:00. # http://puentelibre.mx/noticia/ciudad_juarez_cambio_horario_noviembre_2022/ d2644 2 a2645 2 Rule Mexico 2002 2022 - Apr Sun>=1 2:00 1:00 D Rule Mexico 2002 2022 - Oct lastSun 2:00 0 S d2659 4 a2662 4 # This includes the following municipios: # in Coahuila: Acuña, Allende, Guerrero, Hidalgo, Jiménez, Morelos, Nava, # Ocampo, Piedras Negras, Villa Unión, Zaragoza # in Nuevo León: Anáhuac d2665 3 a2667 1 # https://www.dof.gob.mx/nota_detalle.php?codigo=5670045&fecha=28/10/2022 d2686 5 a2690 5 # Chihuahua (near US border - western side) # This includes the municipios of Janos, Ascensión, Juárez, Guadalupe, and # Práxedis G Guerrero. # http://gaceta.diputados.gob.mx/PDF/65/2a022/nov/20221124-VII.pdf Zone America/Ciudad_Juarez -7:05:56 - LMT 1922 Jan 1 7:00u a2697 2 -7:00 US M%sT 2022 Oct 30 2:00 -6:00 - CST 2022 Nov 30 0:00 a2698 15 # Chihuahua (near US border - eastern side) # This includes the municipios of Coyame del Sotol, Ojinaga, and Manuel # Benavides. # http://gaceta.diputados.gob.mx/PDF/65/2a022/nov/20221124-VII.pdf Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 7:00u -7:00 - MST 1927 Jun 10 23:00 -6:00 - CST 1930 Nov 15 -7:00 Mexico M%sT 1932 Apr 1 -6:00 - CST 1996 -6:00 Mexico C%sT 1998 -6:00 - CST 1998 Apr Sun>=1 3:00 -7:00 Mexico M%sT 2010 -7:00 US M%sT 2022 Oct 30 2:00 -6:00 - CST 2022 Nov 30 0:00 -6:00 US C%sT d2707 1 a2707 2 -7:00 Mexico M%sT 2022 Oct 30 2:00 -6:00 - CST a2718 12 # Baja California Sur, Nayarit (except Bahía de Banderas), Sinaloa Zone America/Mazatlan -7:05:40 - LMT 1922 Jan 1 7:00u -7:00 - MST 1927 Jun 10 23:00 -6:00 - CST 1930 Nov 15 -7:00 Mexico M%sT 1932 Apr 1 -6:00 - CST 1942 Apr 24 -7:00 - MST 1949 Jan 14 -8:00 - PST 1970 -7:00 Mexico M%sT # Bahía de Banderas d2746 11 a2804 4 # From Paul Eggert (2022-10-28): # Today's new law states that the entire state of Baja California # follows US DST rules, which agrees with simplifications noted above. # d2816 1 a2816 1 # Antigua & Barbuda d2822 1 d3137 1 a3137 1 # http://www.prensalatina.com.mx/article.asp?ID={4CC32C1B-A9F7-42FB-8A07-8631AFC923AF}&language=ES d3289 1 a3347 1 d3541 1 d3632 1 d3641 1 a3641 1 # St Vincent & the Grenadines d3647 1 d3730 2 @ 1.1.1.16.4.11 log @Pull up the following, requested by kre in ticket #1935: external/public-domain/tz/dist/Makefile up to 1.1.1.38 external/public-domain/tz/dist/NEWS up to 1.1.1.45 external/public-domain/tz/dist/TZDATA_VERSION up to 1.37 external/public-domain/tz/dist/africa up to 1.1.1.33 external/public-domain/tz/dist/asia up to 1.12 external/public-domain/tz/dist/australasia up to 1.9 external/public-domain/tz/dist/checknow.awk up to 1.1.1.2 external/public-domain/tz/dist/etcetera up to 1.1.1.8 external/public-domain/tz/dist/europe up to 1.1.1.39 external/public-domain/tz/dist/leap-seconds.list up to 1.7 external/public-domain/tz/dist/leapseconds up to 1.7 external/public-domain/tz/dist/leapseconds.awk up to 1.1.1.14 external/public-domain/tz/dist/northamerica up to 1.1.1.35 external/public-domain/tz/dist/southamerica up to 1.1.1.25 external/public-domain/tz/dist/theory.html up to 1.1.1.19 external/public-domain/tz/dist/version up to 1.12 external/public-domain/tz/dist/zishrink.awk up to 1.1.1.9 external/public-domain/tz/dist/zonenow.tab up to 1.1.1.2 doc/3RDPARTY apply patch Updated tzdata to 2024a @ text @a1270 4 # For the 1911/1912 establishment of standard time in French possessions, see: # Société Française de Physique, Recueil de constantes physiques (1913), # page 752, 18b. # d1357 1 a1357 1 # https://web.archive.org/web/19990827055050/https://canadiangeographic.ca/SO98/geomap.htm a1648 9 # From Chris Walton (2024-01-09): # The [Toronto] changes in 1947, 1948, and 1949 took place at 2:00 a.m. local # time instead of midnight.... Toronto Daily Star - ... # April 2, 1947 - Page 39 ... April 7, 1948 - Page 13 ... # April 2, 1949 - Page 1 ... April 7, 1949 - Page 24 ... # November 25, 1949 - Page 52 ... April 21, 1950 - Page 14 ... # September 19, 1950 - Page 46 ... September 20, 1950 - Page 3 ... # November 24, 1950 - Page 21 d1710 7 a1716 3 Rule Toronto 1945 1948 - Sep lastSun 2:00 0 S Rule Toronto 1946 1973 - Apr lastSun 2:00 1:00 D Rule Toronto 1949 1950 - Nov lastSun 2:00 0 S d3504 1 a3504 1 -4:04:20 - FFMT 1911 May 1 # Fort-de-France MT d3607 1 a3607 1 Zone America/Miquelon -3:44:40 - LMT 1911 Jun 15 # St Pierre @ 1.1.1.17 log @Import tzdata2017c from ftp://ftp.iana.org/tz/releases/tzdata2017c.tar.gz Northern Cyprus switches from +03 to +02/+03 on 2017-10-29. Fiji ends DST 2018-01-14, not 2018-01-21. Namibia switches from +01/+02 to +02 on 2018-04-01. Sudan switches from +03 to +02 on 2017-11-01. Tonga likely switches from +13/+14 to +13 on 2017-11-05. Turks & Caicos switches from -04 to -05/-04 on 2018-11-04. Some corrections to (mostly ancient) historical data. @ text @d108 1 a108 1 # https://web.archive.org/web/20000926032210/http://rowayton.org/rhs/hstaug45.html a111 3 # # From Paul Eggert (2017-09-23): # This was the V-J Day issue of the Clamdigger, a Rowayton, CT newsletter. d260 1 a260 1 # https://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf d349 1 a349 1 # https://docs.legis.wisconsin.gov/statutes/statutes/175.pdf d358 1 a358 1 # https://docs.legis.wisconsin.gov/2007/related/acts/3 d405 1 a405 1 # https://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm d456 1 a456 1 # 1973-11. https://escholarship.org/uc/item/8x22k30c d477 2 a478 2 # https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props # https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props d495 1 a495 1 # From Paul Eggert (2017-06-15): d498 4 a501 10 # On Friday, 1867-10-18 (Gregorian), at precisely 15:30 local time, the # Russian forts and fleet at Sitka fired salutes to mark the ceremony of # formal transfer. See the Sacramento Daily Union (1867-11-14), p 3, col 2. # https://cdnc.ucr.edu/cgi-bin/cdnc?a=d&d=SDU18671114.2.12.1 # Sitka workers did not change their calendars until Sunday, 1867-10-20, # and so celebrated two Sundays that week. See: Ahllund T (tr Hallamaa P). # From the memoirs of a Finnish workman. Alaska History. 2006 Fall;21(2):1-25. # http://alaskahistoricalsociety.org/wp-content/uploads/2016/12/Ahllund-2006-Memoirs-of-a-Finnish-Workman.pdf # Include only the time zone part of this transition, ignoring the switch # from Julian to Gregorian, since we can't represent the Julian calendar. d503 1 a503 1 # As far as we know, of the locations mentioned below only Sitka was d505 4 a508 9 # (Yakutat was colonized by the Russians in 1799, but the settlement was # destroyed in 1805 by a Yakutat-kon war party.) Many of Alaska's inhabitants # were unaware of the US acquisition of Alaska, much less of any calendar or # time change. However, the Russian-influenced part of Alaska did observe # Russian time, and it is more accurate to model this than to ignore it. # The database format requires an exact transition time; use the Russian # salute as a somewhat-arbitrary time for the formal transfer of control for # all of Alaska. Sitka's UTC offset is -9:01:13; adjust its 15:30 to the # local times of other Alaskan locations so that they change simultaneously. d561 1 a561 1 # https://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/ d564 1 a564 1 Zone America/Juneau 15:02:19 - LMT 1867 Oct 19 15:33:32 d574 1 a574 1 Zone America/Sitka 14:58:47 - LMT 1867 Oct 19 15:30 d582 1 a582 1 Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 19 15:44:55 d590 1 a590 1 Zone America/Yakutat 14:41:05 - LMT 1867 Oct 19 15:12:18 d597 1 a597 1 Zone America/Anchorage 14:00:24 - LMT 1867 Oct 19 14:31:37 d605 1 a605 1 Zone America/Nome 12:58:22 - LMT 1867 Oct 19 13:29:35 d614 1 a614 1 Zone America/Adak 12:13:22 - LMT 1867 Oct 19 12:44:35 d650 1 a650 1 # https://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf d749 1 a749 1 # https://en.wikipedia.org/wiki/Time_in_Indiana d976 1 a976 1 # https://www.gpo.gov/fdsys/pkg/FR-2000-08-17/html/00-20854.htm d1002 1 a1002 1 # https://www.gpo.gov/fdsys/pkg/FR-1999-10-21/html/99-27240.htm a1031 13 # From Paul Eggert (2017-07-26): # Although Shanks says Detroit observed DST in 1967 from 06-14 00:01 # until 10-29 00:01, I now see multiple reports that this is incorrect. # For example, according to a 50-year anniversary report about the 1967 # Detroit riots and a major-league doubleheader on 1967-07-23, "By the time # the last fly ball of the doubleheader settled into the glove of leftfielder # Lenny Green, it was after 7 p.m. Detroit did not observe daylight saving # time, so light was already starting to fail. Twilight was made even deeper # by billowing columns of smoke that ascended in an unbroken wall north of the # ballpark." See: Dow B. Detroit '67: As violence unfolded, Tigers played two # at home vs. Yankees. Detroit Free Press 2017-07-23. # https://www.freep.com/story/sports/mlb/tigers/2017/07/23/detroit-tigers-1967-riot-new-york-yankees/499951001/ # d1036 2 d1101 1 a1101 1 # . d1147 1 a1147 1 # https://archive.news.gov.bc.ca/releases/news_releases_2005-2009/2006AG0014-000330.htm d1151 1 a1151 1 # https://www.novascotia.ca/just/regulations/rg2/2006/ma1206.pdf d1155 1 a1155 1 # https://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf d1159 1 a1159 1 # https://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php d1173 1 a1173 1 # https://www.gov.yk.ca/legislation/regs/oic2006_127.pdf d1194 2 a1195 2 # https://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html # https://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5 d1232 5 a1236 7 # From Paul Eggert (2017-10-14): # Legally Labrador should observe Newfoundland time; see: # McLeod J. Labrador time - legal or not? St. John's Telegram, 2017-10-07 # http://www.thetelegram.com/news/local/labrador-time--legal-or-not-154860/ # Matthews and Vincent (1998) write that the only part of Labrador # that follows the rules is the southeast corner, including Port Hope # Simpson and Mary's Harbour, but excluding, say, Black Tickle. d1436 1 a1436 1 # https://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en a1467 5 # # From Paul Eggert (2017-07-08): # For more on Orillia, see: Daubs K. Bold attempt at daylight saving # time became a comic failure in Orillia. Toronto Star 2017-07-08. # https://www.thestar.com/news/insight/2017/07/08/bold-attempt-at-daylight-saving-time-became-a-comic-failure-in-orillia.html d1959 1 a1959 1 # [https://www.canlii.org/en/ca/laws/stat/rsc-1985-c-i-21/latest/rsc-1985-c-i-21.html] d2024 1 a2024 1 # https://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html d2039 1 a2039 1 # https://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html d2051 1 a2051 1 # https://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html d2065 1 a2065 1 # https://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html d2108 1 a2108 1 # http://www.nunatsiaqonline.ca/archives/nunavut991130/nvt91119_17.html d2126 1 a2126 1 # From d2457 1 a2457 1 # https://www.timeanddate.com/news/time/north-mexico-dst-change.html d2876 1 a2876 1 # https://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html d2923 1 a2923 1 # https://www.timeanddate.com/news/time/cuba-starts-dst-2011.html d2933 1 a2933 1 # https://www.timeanddate.com/news/time/cuba-time-changes-2011.html d2943 1 a2943 1 # https://www.timeanddate.com/news/time/cuba-starts-dst-2012.html d3138 2 a3139 2 # https://www.radiotelevisioncaraibes.com/presse/heure_d_t_pas_de_changement_d_heure_pr_vu_pour_cet_ann_e.html # https://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/ d3338 1 a3338 1 # https://bugs.debian.org/415007 a3359 12 # From the Turks & Caicos Cabinet (2017-07-20), heads-up from Steffen Thorsen: # ... agreed to the reintroduction in TCI of Daylight Saving Time (DST) # during the summer months and Standard Time, also known as Local # Time, during the winter months with effect from April 2018 ... # https://www.gov.uk/government/news/turks-and-caicos-post-cabinet-meeting-statement--3 # # From Paul Eggert (2017-08-26): # The date of effect of the spring 2018 change appears to be March 11, # which makes more sense. See: Hamilton D. Time change back # by March 2018 for TCI. Magnetic Media. 2017-08-25. # http://magneticmediatv.com/2017/08/time-change-back-by-march-2018-for-tci/ # d3365 1 a3365 2 -4:00 - AST 2018 Mar 11 3:00 -5:00 US E%sT @ 1.1.1.18 log @Import tzdata2018c from ftp://ftp.iana.org/tz/releases/tzdata2018c.tar.gz Summary of changes in tzdata2018c (2018-01-22 23:00:44 -0800): Summary of changes in tzdata2018b (2018-01-17 23:24:48 -0800): Summary of changes in tzdata2018a (2018-01-12 22:29:21 -0800): 2018a and 2018b were (kind of) released, but never announced. Some "issues" were found with them that caused the relatively quick updates... The updates are from the previous version (2017c) to the current one (2018c) - that 2018a & 2018b intervened is best forgotten... (changes in 2018a that were corrected (2018b) or reverted (2018c) are not mentioned). Briefly: Sao Tome and Principe (An island nation off west coast of Equatorial Africa) switched from +00 to +01. Brazil's DST will now start on November's first Sunday. Use Debian-style installation locations, instead of 4.3BSD-style. (this does not affect NetBSD, we do not use the tzdata Makefile) Changes to past and future time stamps Sao Tome and Principe switched from +00 to +01 on 2018-01-01 at 01:00. (Thanks to Steffen Thorsen and Michael Deckers.) Changes to future time stamps Starting in 2018 southern Brazil will begin DST on November's first Sunday instead of October's third Sunday. (Thanks to Steffen Thorsen.) Changes to past time stamps Japanese DST transitions (1948-1951) were Sundays at 00:00, not Saturdays or Sundays at 02:00. (Thanks to Takayuki Nikai.) A discrepancy of 4 s in timestamps before 1931 in South Sudan has been corrected. The 'backzone' and 'zone.tab' files did not agree with the 'africa' and 'zone1970.tab' files. (Problem reported by Michael Deckers.) The abbreviation invented for Bolivia Summer Time (1931-2) is now BST instead of BOST, to be more consistent with the convention used for Latvian Summer Time (1918-9) and for British Summer Time. @ text @a350 12 # From Paul Eggert (2018-01-07): # In 1869 the Chicago Astronomical Society contracted with the city to keep # time. Though delayed by the Great Fire, by 1880 a wire ran from the # Dearborn Observatory (on the University of Chicago campus) to City Hall, # which then sent signals to police and fire stations. However, railroads got # their time signals from the Allegheny Observatory, the Madison Observatory, # the Ann Arbor Observatory, etc., so their clocks did not agree with each # other or with the city's official time. The confusion took some years to # clear up. See: # Moser M. How Chicago gave America its time zones. Chicago. 2018-01-04. # http://www.chicagomag.com/city-life/January-2018/How-Chicago-Gave-America-Its-Time-Zones/ d1899 1 a1899 1 # i.e. Creston has been stuck on UT-7 for 93 years. @ 1.1.1.18.2.1 log @Resolve conflicts between branch and HEAD @ text @d28 1 a28 1 # From Paul Eggert (2018-03-20): d39 4 a42 3 # railroads had agreed and it took effect on 1883-11-18. That Sunday # was called the "day of two noons", as some locations observed noon # twice. Allen witnessed the transition in New York City, writing: d427 2 a428 1 # at 47° 15' 51" N, 101° 46' 40" W, which yields an offset of 6h47'07". d461 1 a461 1 # Nevada (except West Wendover), Oregon (except the northern ¾ of a958 7 # From Paul Eggert (2018-03-20): # The Louisville & Nashville Railroad's 1883-11-18 change occurred at # 10:00 old local time; train were supposed to come to a standstill # for precisely 18 minutes. See Bartky Fig. 1 (page 50). It is not # clear how this matched civil time in Louisville, so for now continue # to assume Louisville switched at noon new local time, like New York. # d3267 2 a3268 2 Zone America/Jamaica -5:07:10 - LMT 1890 # Kingston -5:07:10 - KMT 1912 Feb # Kingston Mean Time d3418 1 a3418 1 -5:07:10 - KMT 1912 Feb # Kingston Mean Time @ 1.1.1.18.2.2 log @Sync with head @ text @a0 2 # tzdb data for North and Central America and environs d51 1 a51 1 # https://dx.doi.org/10.2307/3105430 @ 1.1.1.18.2.3 log @Sync with HEAD, resolve a couple of conflicts @ text @a441 13 # From Paul Eggert (2018-10-25): # On 1921-03-04 federal law placed all of Texas into the central time zone. # However, El Paso ignored the law for decades and continued to observe # mountain time, on the grounds that that's what they had always done # and they weren't about to let the federal government tell them what to do. # Eventually the federal government gave in and changed the law on # 1970-04-10 to match what El Paso was actually doing. Although # that's slightly after our 1970 cutoff, there is no need to create a # separate zone for El Paso since they were ignoring the law anyway. See: # Long T. El Pasoans were time rebels, fought to stay in Mountain zone. # El Paso Times. 2018-10-24 06:40 -06. # https://www.elpasotimes.com/story/news/local/el-paso/2018/10/24/el-pasoans-were-time-rebels-fought-stay-mountain-zone/1744509002/ # d711 3 a713 1 -10:30 US H%sT 1947 Jun 8 2:00 @ 1.1.1.18.2.4 log @Synch with HEAD @ text @a601 11 # From Ryan Stanley (2018-11-06): # The Metlakatla community in Alaska has decided not to change its # clock back an hour starting on November 4th, 2018 (day before yesterday). # They will be gmtoff=-28800 year-round. # https://www.facebook.com/141055983004923/photos/pb.141055983004923.-2207520000.1541465673./569081370202380/ # From Paul Eggert (2018-12-16): # In a 2018-12-11 special election, Metlakatla voted to go back to # Alaska time (including daylight saving time) starting next year. # https://www.krbd.org/2018/12/12/metlakatla-to-follow-alaska-standard-time-allow-liquor-sales/ a627 2 -9:00 US AK%sT 2018 Nov 4 2:00 -8:00 - PST 2019 Mar Sun>=8 3:00 a787 16 # From Paul Eggert (2018-11-30): # A brief but entertaining history of time in Indiana describes a 1949 debate # in the Indiana House where city legislators (who favored "fast time") # tussled with farm legislators (who didn't) over a bill to outlaw DST: # "Lacking enough votes, the city faction tries to filibuster until time runs # out on the session at midnight, but rural champion Rep. Herbert Copeland, # R-Madison, leans over the gallery railing and forces the official clock # back to 9 p.m., breaking it in the process. The clock sticks on 9 as the # debate rages on into the night. The filibuster finally dies out and the # bill passes, while outside the chamber, clocks read 3:30 a.m. In the end, # it doesn't matter which side won. The law has no enforcement powers and # is simply ignored by fast-time communities." # How Indiana went from 'God's time' to split zones and daylight-saving. # Indianapolis Star. 2018-11-27 14:58 -05. # https://www.indystar.com/story/news/politics/2018/11/27/indianapolis-indiana-time-zone-history-central-eastern-daylight-savings-time/2126300002/ # @ 1.1.1.19 log @Import tzdata2018d from ftp://ftp.iana.org/tz/releases/tzdata2018d.tar.gz Summary of changes in tzdata2018d (2018-03-22 07:05:46 -0700): In 2018, Palestine starts DST on March 24 (today!), not March 31 Casey Station in Antarctica changed from +11 to +08 on 2018-03-11 at 04:00. Various adjustments to some historical conversions (several for Uruguay (1920 .. 1990), one fpr Enderbury and Kiritimati (1994/5), one for Portugal and colonies (1912) and Jamaica and Turks & Caicos (pre 1913)). @ text @d28 1 a28 1 # From Paul Eggert (2018-03-20): d39 4 a42 3 # railroads had agreed and it took effect on 1883-11-18. That Sunday # was called the "day of two noons", as some locations observed noon # twice. Allen witnessed the transition in New York City, writing: d427 2 a428 1 # at 47° 15' 51" N, 101° 46' 40" W, which yields an offset of 6h47'07". d461 1 a461 1 # Nevada (except West Wendover), Oregon (except the northern ¾ of a958 7 # From Paul Eggert (2018-03-20): # The Louisville & Nashville Railroad's 1883-11-18 change occurred at # 10:00 old local time; train were supposed to come to a standstill # for precisely 18 minutes. See Bartky Fig. 1 (page 50). It is not # clear how this matched civil time in Louisville, so for now continue # to assume Louisville switched at noon new local time, like New York. # d3267 2 a3268 2 Zone America/Jamaica -5:07:10 - LMT 1890 # Kingston -5:07:10 - KMT 1912 Feb # Kingston Mean Time d3418 1 a3418 1 -5:07:10 - KMT 1912 Feb # Kingston Mean Time @ 1.1.1.19.2.1 log @Sync with HEAD @ text @a0 2 # tzdb data for North and Central America and environs d51 1 a51 1 # https://dx.doi.org/10.2307/3105430 a439 13 # From Paul Eggert (2018-10-25): # On 1921-03-04 federal law placed all of Texas into the central time zone. # However, El Paso ignored the law for decades and continued to observe # mountain time, on the grounds that that's what they had always done # and they weren't about to let the federal government tell them what to do. # Eventually the federal government gave in and changed the law on # 1970-04-10 to match what El Paso was actually doing. Although # that's slightly after our 1970 cutoff, there is no need to create a # separate zone for El Paso since they were ignoring the law anyway. See: # Long T. El Pasoans were time rebels, fought to stay in Mountain zone. # El Paso Times. 2018-10-24 06:40 -06. # https://www.elpasotimes.com/story/news/local/el-paso/2018/10/24/el-pasoans-were-time-rebels-fought-stay-mountain-zone/1744509002/ # a586 20 # From Ryan Stanley (2018-11-06): # The Metlakatla community in Alaska has decided not to change its # clock back an hour starting on November 4th, 2018 (day before yesterday). # They will be gmtoff=-28800 year-round. # https://www.facebook.com/141055983004923/photos/pb.141055983004923.-2207520000.1541465673./569081370202380/ # From Paul Eggert (2018-12-16): # In a 2018-12-11 special election, Metlakatla voted to go back to # Alaska time (including daylight saving time) starting next year. # https://www.krbd.org/2018/12/12/metlakatla-to-follow-alaska-standard-time-allow-liquor-sales/ # # From Ryan Stanley (2019-01-11): # The community will be changing back on the 20th of this month... # From Tim Parenti (2019-01-11): # Per an announcement on the Metlakatla community's official Facebook page, the # "fall back" will be on Sunday 2019-01-20 at 02:00: # https://www.facebook.com/141055983004923/photos/607150969728753/ # So they won't be waiting for Alaska to join them on 2019-03-10, but will # rather change their clocks twice in seven weeks. a612 2 -9:00 US AK%sT 2018 Nov 4 2:00 -8:00 - PST 2019 Jan 20 2:00 d709 3 a711 1 -10:30 US H%sT 1947 Jun 8 2:00 a774 16 # From Paul Eggert (2018-11-30): # A brief but entertaining history of time in Indiana describes a 1949 debate # in the Indiana House where city legislators (who favored "fast time") # tussled with farm legislators (who didn't) over a bill to outlaw DST: # "Lacking enough votes, the city faction tries to filibuster until time runs # out on the session at midnight, but rural champion Rep. Herbert Copeland, # R-Madison, leans over the gallery railing and forces the official clock # back to 9 p.m., breaking it in the process. The clock sticks on 9 as the # debate rages on into the night. The filibuster finally dies out and the # bill passes, while outside the chamber, clocks read 3:30 a.m. In the end, # it doesn't matter which side won. The law has no enforcement powers and # is simply ignored by fast-time communities." # How Indiana went from 'God's time' to split zones and daylight-saving. # Indianapolis Star. 2018-11-27 14:58 -05. # https://www.indystar.com/story/news/politics/2018/11/27/indianapolis-indiana-time-zone-history-central-eastern-daylight-savings-time/2126300002/ # @ 1.1.1.19.2.2 log @Mostly merge changes from HEAD upto 20200411 @ text @d96 4 a99 27 # From Paul Eggert (2019-06-04): # Here is the legal basis for the US federal rules. # * Public Law 65-106 (1918-03-19) implemented standard and daylight saving # time for the first time across the US, springing forward on March's last # Sunday and falling back on October's last Sunday. # https://www.loc.gov/law/help/statutes-at-large/65th-congress/session-2/c65s2ch24.pdf # * Public Law 66-40 (1919-08-20) repealed DST on October 1919's last Sunday. # https://www.loc.gov/law/help/statutes-at-large/66th-congress/session-1/c66s1ch51.pdf # * Public Law 77-403 (1942-01-20) started wartime DST on 1942-02-09. # https://www.loc.gov/law/help/statutes-at-large/77th-congress/session-2/c77s2ch7.pdf # * Public Law 79-187 (1945-09-25) ended wartime DST on 1945-09-30. # https://www.loc.gov/law/help/statutes-at-large/79th-congress/session-1/c79s1ch388.pdf # * Public Law 89-387 (1966-04-13) reinstituted a national standard for DST, # from April's last Sunday to October's last Sunday, effective 1967. # https://www.govinfo.gov/content/pkg/STATUTE-80/pdf/STATUTE-80-Pg107.pdf # * Public Law 93-182 (1973-12-15) moved the 1974 spring-forward to 01-06. # https://www.govinfo.gov/content/pkg/STATUTE-87/pdf/STATUTE-87-Pg707.pdf # * Public Law 93-434 (1974-10-05) moved the 1975 spring-forward to # February's last Sunday. # https://www.govinfo.gov/content/pkg/STATUTE-88/pdf/STATUTE-88-Pg1209.pdf # * Public Law 99-359 (1986-07-08) moved the spring-forward to April's first # Sunday. # https://www.govinfo.gov/content/pkg/STATUTE-100/pdf/STATUTE-100-Pg764.pdf # * Public Law 109-58 (2005-08-08), effective 2007, moved the spring-forward # to March's second Sunday and the fall-back to November's first Sunday. # https://www.govinfo.gov/content/pkg/PLAW-109publ58/pdf/PLAW-109publ58.pdf # All transitions are at 02:00 local time. d155 1 a155 1 Rule US 1945 only - Sep 30 2:00 0 S d159 1 a159 1 Rule US 1975 only - Feb lastSun 2:00 1:00 D d176 1 a176 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d333 1 a333 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] a385 25 # From Paul Eggert (2015-04-06): # In 1950s Nashville a public clock had dueling faces, one for conservatives # and the other for liberals; the two sides didn't agree about the time of day. # I haven't found a photo of this clock, nor have I tracked down the TIME # magazine report cited below, but here's the story as told by the late # American journalist John Seigenthaler, who was there: # # "The two [newspaper] owners held strongly contrasting political and # ideological views. Evans was a New South liberal, Stahlman an Old South # conservative, and their two papers frequently clashed editorially, often on # the same day.... In the 1950s as the state legislature was grappling with # the question of whether to approve daylight saving time for the entire state, # TIME magazine reported: # # "'The Nashville Banner and The Nashville Tennessean rarely agree on anything # but the time of day - and last week they couldn't agree on that.' # # "It was all too true. The clock on the front of the building had two faces - # The Tennessean side of the building facing west, the other, east. When it # was high noon Banner time, it was 11 a.m. Tennessean time." # # Seigenthaler J. For 100 years, Tennessean had it covered. # The Tennessean 2007-05-11, republished 2015-04-06. # https://www.tennessean.com/story/insider/extras/2015/04/06/archives-seigenthaler-for-100-years-the-tennessean-had-it-covered/25348545/ d393 1 a393 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d461 1 a461 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d514 1 a514 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d622 1 a622 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d742 1 a742 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d772 1 a772 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d798 1 a798 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d870 1 a870 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d890 1 a890 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d914 1 a914 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] a924 4 # From Alois Triendl (2019-07-09): # The Indianapolis News, Friday 27 October 1967 states that Perry County # returned to CST. It went again to EST on 27 April 1969, as documented by the # Indianapolis star of Saturday 26 April. d926 4 a930 1 Rule Perry 1955 1960 - Sep lastSun 2:00 0 S d932 4 a935 2 Rule Perry 1961 1963 - Oct lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] d939 1 a939 2 -5:00 - EST 1967 Oct 29 2:00 -6:00 US C%sT 1969 Apr 27 2:00 d951 1 a951 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d973 1 a973 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d989 1 a989 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d1000 1 a1000 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] a1014 9 # From Michael Deckers (2019-08-06): # From the contemporary source given by Alois Treindl, # the switch in Louisville on 1946-04-28 was on 00:01 # From Paul Eggert (2019-08-26): # That source was the Louisville Courier-Journal, 1946-04-27, p 4. # Shanks gives 02:00 for all 20th-century transition times in Louisville. # Evidently this is wrong for spring 1946. Although also likely wrong # for other dates, we have no data. # d1020 1 a1020 1 Rule Louisville 1941 only - Apr lastSun 2:00 1:00 D a1021 1 Rule Louisville 1946 only - Apr lastSun 0:01 1:00 D a1022 1 Rule Louisville 1950 1961 - Apr lastSun 2:00 1:00 D d1024 2 a1025 2 Rule Louisville 1956 1961 - Oct lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] d1114 12 a1125 13 # From Paul Eggert (2019-07-06): # Due to a complicated set of legal maneuvers, in 1967 Michigan did # not start daylight saving time when the rest of the US did. # Instead, it began DST on Jun 14 at 00:01. This was big news: # the Detroit Free Press reported it at the top of Page 1 on # 1967-06-14, in an article "State Adjusting to Switch to Fast Time" # by Gary Blonston, above an article about Thurgood Marshall's # confirmation to the US Supreme Court. Although Shanks says Detroit # observed DST until 1967-10-29 00:01, that time of day seems to be # incorrect, as the Free Press later said DST ended in Michigan at the # same time as the rest of the US. Also, although Shanks reports no DST in # Detroit in 1968, it did observe DST that year; in the November 1968 # election Michigan voters narrowly repealed DST, effective 1969. d1131 1 a1131 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d1136 1 a1136 3 -5:00 Detroit E%sT 1967 Jun 14 0:01 -5:00 US E%sT 1969 -5:00 - EST 1973 d1148 1 a1148 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] a1184 6 # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 # . # # Pearce C. The Great Daylight Saving Time Controversy. # Australian Ebook Publisher. 2017. ISBN 978-1-925516-96-8. # d1193 3 d1382 1 a1382 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d1395 1 a1395 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d1469 1 a1469 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d1507 1 a1507 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d1536 1 a1536 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d1704 13 a1716 4 Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S d1749 1 a1749 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d1824 1 a1824 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] a1845 6 # From Paul Eggert (2019-07-25): # Pearce's book says Regina observed DST in 1914-1917. No dates and times, # unfortunately. It also says that in 1914 Saskatoon observed DST # from 1 June to 6 July, and that DST was also tried out in Davidson, # Melfort, and Prince Albert. d1908 1 a1908 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] a1920 13 # From Alois Triendl (2019-07-19): # There was no DST in Alberta in 1967... Calgary Herald, 29 April 1967. # 1969, no DST, from Edmonton Journal 18 April 1969 # # From Paul Eggert (2019-07-25): # Pearce's book says that Alberta's 1948 Daylight Saving Act required # Mountain Standard Time without DST, and that "anyone who broke that law # could be fined up to $25 and costs". There seems to be no record of # anybody paying the fine. The law was not changed until an August 1971 # plebiscite reinstituted DST in 1972. This story is also mentioned in: # Boyer JP. Forcing Choice: The Risky Reward of Referendums. Dundum. 2017. # ISBN 978-1459739123. d1933 4 d1939 1 a1939 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2019 1 a2019 1 # From Paul Eggert (2019-07-25): a2020 12 # Alois Triendl confirmed this on 07-22, citing the 1946-04-27 Vancouver Daily # Province. He also cited the 1946-09-28 Victoria Daily Times, which said # that Vancouver, Victoria, etc. "change at midnight Saturday"; for now, # guess they meant 02:00 Sunday since 02:00 was common practice in Vancouver. # # Early Vancouver, Volume Four, by Major J.S. Matthews, V.D., 2011 edition # says that a 1922 plebiscite adopted DST, but a 1923 plebiscite rejected it. # http://former.vancouver.ca/ctyclerk/archives/digitized/EarlyVan/SearchEarlyVan/Vol4pdf/MatthewsEarlyVancouverVol4_DaylightSavings.pdf # A catalog entry for a newspaper clipping seems to indicate that Vancouver # observed DST in 1941 from 07-07 through 09-27; see # https://searcharchives.vancouver.ca/daylight-saving-1918-starts-again-july-7-1941-start-d-s-sept-27-end-of-d-s-1941 # We have no further details, so omit them for now. d2029 1 a2029 1 Rule Vanc 1946 only - Sep 29 2:00 0 S d2032 1 a2032 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2103 1 a2103 1 # [no online source found] d2136 1 a2136 1 # [no online source found] d2352 1 a2352 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2499 1 a2499 1 # https://www.latimes.com/archives/la-xpm-2001-mar-03-mn-32561-story.html d2626 1 a2626 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2819 1 a2819 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2834 1 a2834 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2848 1 a2848 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2865 1 a2865 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2887 1 a2887 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3093 1 a3093 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3128 1 a3128 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3143 1 a3143 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3176 1 a3176 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3262 1 a3262 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3301 1 a3301 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3322 1 a3322 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3330 1 a3330 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3394 1 a3394 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3406 1 a3406 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3414 1 a3414 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3426 1 a3426 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3472 1 a3472 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] @ 1.1.1.20 log @Import tzdata2018f from ftp://ftp.iana.org/tz/releases/tzdata2018f.tar.gz Volgograd moves from +03 to +04 on 2018-10-28. Fiji ends DST 2019-01-13, not 2019-01-20. Most of Chile changes DST dates, effective 2019-04-06. Plus corrections to North Korea's 2018-05-05 and China's April 1988 updates (getting the actual time/date of the transition correct) Corrections for Macau pre 1992, Japan in late 1940's - early 1950's, and China (Shanghai) 1940's. The Phillipines get their timezone name abbreviations back. @ text @a0 2 # tzdb data for North and Central America and environs d51 1 a51 1 # https://dx.doi.org/10.2307/3105430 @ 1.1.1.21 log @Import tzdata2018g from ftp://ftp.iana.org/tz/releases/tzdata2018g.tar.gz Summary of changes in tzdata2018g (2018-10-26 22:22:45 -0700): Morocco switches to permanent +01 on 2018-10-27. @ text @a441 13 # From Paul Eggert (2018-10-25): # On 1921-03-04 federal law placed all of Texas into the central time zone. # However, El Paso ignored the law for decades and continued to observe # mountain time, on the grounds that that's what they had always done # and they weren't about to let the federal government tell them what to do. # Eventually the federal government gave in and changed the law on # 1970-04-10 to match what El Paso was actually doing. Although # that's slightly after our 1970 cutoff, there is no need to create a # separate zone for El Paso since they were ignoring the law anyway. See: # Long T. El Pasoans were time rebels, fought to stay in Mountain zone. # El Paso Times. 2018-10-24 06:40 -06. # https://www.elpasotimes.com/story/news/local/el-paso/2018/10/24/el-pasoans-were-time-rebels-fought-stay-mountain-zone/1744509002/ # d711 3 a713 1 -10:30 US H%sT 1947 Jun 8 2:00 @ 1.1.1.22 log @Import tzdata2018h from ftp://ftp.iana.org/tz/releases/tzdata2018h.tar.gz Summary of changes in tzdata2018h (2018-12-23 17:59:32 -0800): Qyzylorda (aka Kyzylorda) oblast in Kazakhstan moved from +06 to +05 on 2018-12-21. This is a zone split as Qostanay (aka Kostanay) did not switch, so create a zone Asia/Qostanay. Metlakatla, Alaska observes PST this winter only. Add predictions for Iran from 2038 through 2090. Changes to some old timestamps for Nauru (1979) Guam (1959-77), Hong Kong (1904, 1941, 1945, 1952) (others in Pacific during WWII) @ text @a601 11 # From Ryan Stanley (2018-11-06): # The Metlakatla community in Alaska has decided not to change its # clock back an hour starting on November 4th, 2018 (day before yesterday). # They will be gmtoff=-28800 year-round. # https://www.facebook.com/141055983004923/photos/pb.141055983004923.-2207520000.1541465673./569081370202380/ # From Paul Eggert (2018-12-16): # In a 2018-12-11 special election, Metlakatla voted to go back to # Alaska time (including daylight saving time) starting next year. # https://www.krbd.org/2018/12/12/metlakatla-to-follow-alaska-standard-time-allow-liquor-sales/ a627 2 -9:00 US AK%sT 2018 Nov 4 2:00 -8:00 - PST 2019 Mar Sun>=8 3:00 a787 16 # From Paul Eggert (2018-11-30): # A brief but entertaining history of time in Indiana describes a 1949 debate # in the Indiana House where city legislators (who favored "fast time") # tussled with farm legislators (who didn't) over a bill to outlaw DST: # "Lacking enough votes, the city faction tries to filibuster until time runs # out on the session at midnight, but rural champion Rep. Herbert Copeland, # R-Madison, leans over the gallery railing and forces the official clock # back to 9 p.m., breaking it in the process. The clock sticks on 9 as the # debate rages on into the night. The filibuster finally dies out and the # bill passes, while outside the chamber, clocks read 3:30 a.m. In the end, # it doesn't matter which side won. The law has no enforcement powers and # is simply ignored by fast-time communities." # How Indiana went from 'God's time' to split zones and daylight-saving. # Indianapolis Star. 2018-11-27 14:58 -05. # https://www.indystar.com/story/news/politics/2018/11/27/indianapolis-indiana-time-zone-history-central-eastern-daylight-savings-time/2126300002/ # @ 1.1.1.23 log @Import tzdata2019a from ftp://ftp.iana.org/tz/releases/tzdata2019a.tar.gz Release 20198 - 2019-03-25 22:01:33 -0700 Briefly: Palestine summer time starts on 2019-03-30 instead of 2019-03-23. Metlakatla switched back to rejoin Alaska Time on 2019-01-20 at 02:00. Israel observed summer time in 1980 (08-02/09-13) and 1984 (05-05/08-25). Etc/UCT is now a backward-compatibility link to Etc/UTC, instead of being a separate zone that generates the abbreviation "UCT". @ text @a611 9 # # From Ryan Stanley (2019-01-11): # The community will be changing back on the 20th of this month... # From Tim Parenti (2019-01-11): # Per an announcement on the Metlakatla community's official Facebook page, the # "fall back" will be on Sunday 2019-01-20 at 02:00: # https://www.facebook.com/141055983004923/photos/607150969728753/ # So they won't be waiting for Alaska to join them on 2019-03-10, but will # rather change their clocks twice in seven weeks. d640 1 a640 1 -8:00 - PST 2019 Jan 20 2:00 @ 1.1.1.23.2.1 log @Pull up the following revisions, requested by kre in ticket #468: external/public-domain/tz/dist/Makefile up to 1.1.1.25 external/public-domain/tz/dist/NEWS up to 1.1.1.28 external/public-domain/tz/dist/TZDATA_VERSION up to 1.18 external/public-domain/tz/dist/africa up to 1.1.1.21 external/public-domain/tz/dist/antarctica up to 1.1.1.12 external/public-domain/tz/dist/asia up to 1.1.1.24 external/public-domain/tz/dist/australasia up to 1.1.1.18 external/public-domain/tz/dist/backzone up to 1.1.1.17 external/public-domain/tz/dist/checktab.awk up to 1.1.1.10 external/public-domain/tz/dist/europe up to 1.1.1.25 external/public-domain/tz/dist/factory up to 1.1.1.4 external/public-domain/tz/dist/leap-seconds.list up to 1.1.1.12 external/public-domain/tz/dist/leapseconds up to 1.1.1.14 external/public-domain/tz/dist/leapseconds.awk up to 1.1.1.9 external/public-domain/tz/dist/northamerica up to 1.1.1.24 external/public-domain/tz/dist/pacificnew up to 1.1.1.3 external/public-domain/tz/dist/southamerica up to 1.1.1.16 external/public-domain/tz/dist/systemv up to 1.1.1.3 external/public-domain/tz/dist/theory.html up to 1.1.1.9 external/public-domain/tz/dist/version up to 1.1.1.15 external/public-domain/tz/dist/zishrink.awk up to 1.1.1.6 external/public-domain/tz/dist/zone.tab up to 1.1.1.17 external/public-domain/tz/dist/zone1970.tab up to 1.1.1.19 external/public-domain/tz/dist/zoneinfo2tdf.pl up to 1.1.1.3 doc/3RDPARTY 1.1655 (patch) Import tzdata2019c from ftp://ftp.iana.org/tz/releases/tzdata2019c.tar.gz Summary of changes in tzdata2019c (2019-09-11 08:59:48 -0700): Fiji observes DST from 2019-11-10 to 2020-01-12 Norfolk Island starts observing Australian-style DST Plus historic corrections to time in Turkey (1940-85) South Korea (1948-51) Detroit (US) (1967-8), Perry County (Indiana, US) (pre 1970) Edmonton (CA) (1967, 1969) Vancouver (CA) (1946), Vienna (AT) (1946), Kaliningrad (1945-6). Louisville (US) (1946-50). Brussles (BE) (1892). Hong Kong Winter Time (1941) now listed as being "DST". Summary of changes in tzdata2019b (2019-07-01 00:09:53 -0700): Brazil no longer observes DST Predictions for Morocco extended to 2087. Panestine (March 2019) time zone change date corrected (and guesses for future transitions revised). Historic updates: Honk Kong (1941 - 1947), Italy (1866). @ text @d96 4 a99 27 # From Paul Eggert (2019-06-04): # Here is the legal basis for the US federal rules. # * Public Law 65-106 (1918-03-19) implemented standard and daylight saving # time for the first time across the US, springing forward on March's last # Sunday and falling back on October's last Sunday. # https://www.loc.gov/law/help/statutes-at-large/65th-congress/session-2/c65s2ch24.pdf # * Public Law 66-40 (1919-08-20) repealed DST on October 1919's last Sunday. # https://www.loc.gov/law/help/statutes-at-large/66th-congress/session-1/c66s1ch51.pdf # * Public Law 77-403 (1942-01-20) started wartime DST on 1942-02-09. # https://www.loc.gov/law/help/statutes-at-large/77th-congress/session-2/c77s2ch7.pdf # * Public Law 79-187 (1945-09-25) ended wartime DST on 1945-09-30. # https://www.loc.gov/law/help/statutes-at-large/79th-congress/session-1/c79s1ch388.pdf # * Public Law 89-387 (1966-04-13) reinstituted a national standard for DST, # from April's last Sunday to October's last Sunday, effective 1967. # https://www.govinfo.gov/content/pkg/STATUTE-80/pdf/STATUTE-80-Pg107.pdf # * Public Law 93-182 (1973-12-15) moved the 1974 spring-forward to 01-06. # https://www.govinfo.gov/content/pkg/STATUTE-87/pdf/STATUTE-87-Pg707.pdf # * Public Law 93-434 (1974-10-05) moved the 1975 spring-forward to # February's last Sunday. # https://www.govinfo.gov/content/pkg/STATUTE-88/pdf/STATUTE-88-Pg1209.pdf # * Public Law 99-359 (1986-07-08) moved the spring-forward to April's first # Sunday. # https://www.govinfo.gov/content/pkg/STATUTE-100/pdf/STATUTE-100-Pg764.pdf # * Public Law 109-58 (2005-08-08), effective 2007, moved the spring-forward # to March's second Sunday and the fall-back to November's first Sunday. # https://www.govinfo.gov/content/pkg/PLAW-109publ58/pdf/PLAW-109publ58.pdf # All transitions are at 02:00 local time. d155 1 a155 1 Rule US 1945 only - Sep 30 2:00 0 S d159 1 a159 1 Rule US 1975 only - Feb lastSun 2:00 1:00 D d176 1 a176 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d333 1 a333 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] a385 25 # From Paul Eggert (2015-04-06): # In 1950s Nashville a public clock had dueling faces, one for conservatives # and the other for liberals; the two sides didn't agree about the time of day. # I haven't found a photo of this clock, nor have I tracked down the TIME # magazine report cited below, but here's the story as told by the late # American journalist John Seigenthaler, who was there: # # "The two [newspaper] owners held strongly contrasting political and # ideological views. Evans was a New South liberal, Stahlman an Old South # conservative, and their two papers frequently clashed editorially, often on # the same day.... In the 1950s as the state legislature was grappling with # the question of whether to approve daylight saving time for the entire state, # TIME magazine reported: # # "'The Nashville Banner and The Nashville Tennessean rarely agree on anything # but the time of day - and last week they couldn't agree on that.' # # "It was all too true. The clock on the front of the building had two faces - # The Tennessean side of the building facing west, the other, east. When it # was high noon Banner time, it was 11 a.m. Tennessean time." # # Seigenthaler J. For 100 years, Tennessean had it covered. # The Tennessean 2007-05-11, republished 2015-04-06. # https://www.tennessean.com/story/insider/extras/2015/04/06/archives-seigenthaler-for-100-years-the-tennessean-had-it-covered/25348545/ d393 1 a393 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d461 1 a461 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d514 1 a514 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d622 1 a622 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d742 1 a742 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d772 1 a772 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d798 1 a798 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d870 1 a870 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d890 1 a890 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d914 1 a914 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] a924 4 # From Alois Triendl (2019-07-09): # The Indianapolis News, Friday 27 October 1967 states that Perry County # returned to CST. It went again to EST on 27 April 1969, as documented by the # Indianapolis star of Saturday 26 April. d926 4 a930 1 Rule Perry 1955 1960 - Sep lastSun 2:00 0 S d932 4 a935 2 Rule Perry 1961 1963 - Oct lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] d939 1 a939 2 -5:00 - EST 1967 Oct 29 2:00 -6:00 US C%sT 1969 Apr 27 2:00 d951 1 a951 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d973 1 a973 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d989 1 a989 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d1000 1 a1000 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] a1014 9 # From Michael Deckers (2019-08-06): # From the contemporary source given by Alois Treindl, # the switch in Louisville on 1946-04-28 was on 00:01 # From Paul Eggert (2019-08-26): # That source was the Louisville Courier-Journal, 1946-04-27, p 4. # Shanks gives 02:00 for all 20th-century transition times in Louisville. # Evidently this is wrong for spring 1946. Although also likely wrong # for other dates, we have no data. # d1020 1 a1020 1 Rule Louisville 1941 only - Apr lastSun 2:00 1:00 D a1021 1 Rule Louisville 1946 only - Apr lastSun 0:01 1:00 D a1022 1 Rule Louisville 1950 1961 - Apr lastSun 2:00 1:00 D d1024 2 a1025 2 Rule Louisville 1956 1961 - Oct lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] d1114 12 a1125 13 # From Paul Eggert (2019-07-06): # Due to a complicated set of legal maneuvers, in 1967 Michigan did # not start daylight saving time when the rest of the US did. # Instead, it began DST on Jun 14 at 00:01. This was big news: # the Detroit Free Press reported it at the top of Page 1 on # 1967-06-14, in an article "State Adjusting to Switch to Fast Time" # by Gary Blonston, above an article about Thurgood Marshall's # confirmation to the US Supreme Court. Although Shanks says Detroit # observed DST until 1967-10-29 00:01, that time of day seems to be # incorrect, as the Free Press later said DST ended in Michigan at the # same time as the rest of the US. Also, although Shanks reports no DST in # Detroit in 1968, it did observe DST that year; in the November 1968 # election Michigan voters narrowly repealed DST, effective 1969. d1131 1 a1131 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d1136 1 a1136 3 -5:00 Detroit E%sT 1967 Jun 14 0:01 -5:00 US E%sT 1969 -5:00 - EST 1973 d1148 1 a1148 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] a1184 6 # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 # . # # Pearce C. The Great Daylight Saving Time Controversy. # Australian Ebook Publisher. 2017. ISBN 978-1-925516-96-8. # d1193 3 d1382 1 a1382 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d1395 1 a1395 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d1469 1 a1469 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d1507 1 a1507 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d1536 1 a1536 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d1704 13 a1716 4 Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S d1749 1 a1749 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d1824 1 a1824 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] a1845 6 # From Paul Eggert (2019-07-25): # Pearce's book says Regina observed DST in 1914-1917. No dates and times, # unfortunately. It also says that in 1914 Saskatoon observed DST # from 1 June to 6 July, and that DST was also tried out in Davidson, # Melfort, and Prince Albert. d1908 1 a1908 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] a1920 13 # From Alois Triendl (2019-07-19): # There was no DST in Alberta in 1967... Calgary Herald, 29 April 1967. # 1969, no DST, from Edmonton Journal 18 April 1969 # # From Paul Eggert (2019-07-25): # Pearce's book says that Alberta's 1948 Daylight Saving Act required # Mountain Standard Time without DST, and that "anyone who broke that law # could be fined up to $25 and costs". There seems to be no record of # anybody paying the fine. The law was not changed until an August 1971 # plebiscite reinstituted DST in 1972. This story is also mentioned in: # Boyer JP. Forcing Choice: The Risky Reward of Referendums. Dundum. 2017. # ISBN 978-1459739123. d1933 4 d1939 1 a1939 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2019 1 a2019 1 # From Paul Eggert (2019-07-25): a2020 12 # Alois Triendl confirmed this on 07-22, citing the 1946-04-27 Vancouver Daily # Province. He also cited the 1946-09-28 Victoria Daily Times, which said # that Vancouver, Victoria, etc. "change at midnight Saturday"; for now, # guess they meant 02:00 Sunday since 02:00 was common practice in Vancouver. # # Early Vancouver, Volume Four, by Major J.S. Matthews, V.D., 2011 edition # says that a 1922 plebiscite adopted DST, but a 1923 plebiscite rejected it. # http://former.vancouver.ca/ctyclerk/archives/digitized/EarlyVan/SearchEarlyVan/Vol4pdf/MatthewsEarlyVancouverVol4_DaylightSavings.pdf # A catalog entry for a newspaper clipping seems to indicate that Vancouver # observed DST in 1941 from 07-07 through 09-27; see # https://searcharchives.vancouver.ca/daylight-saving-1918-starts-again-july-7-1941-start-d-s-sept-27-end-of-d-s-1941 # We have no further details, so omit them for now. d2029 1 a2029 1 Rule Vanc 1946 only - Sep 29 2:00 0 S d2032 1 a2032 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2103 1 a2103 1 # [no online source found] d2136 1 a2136 1 # [no online source found] d2352 1 a2352 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2499 1 a2499 1 # https://www.latimes.com/archives/la-xpm-2001-mar-03-mn-32561-story.html d2626 1 a2626 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2819 1 a2819 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2834 1 a2834 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2848 1 a2848 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2865 1 a2865 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2887 1 a2887 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3093 1 a3093 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3128 1 a3128 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3143 1 a3143 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3176 1 a3176 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3262 1 a3262 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3301 1 a3301 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3322 1 a3322 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3330 1 a3330 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3394 1 a3394 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3406 1 a3406 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3414 1 a3414 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3426 1 a3426 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3472 1 a3472 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] @ 1.1.1.23.2.2 log @Pull up the following, requested by kre in ticket #942: external/public-domain/tz/dist/Makefile up to 1.1.1.26 external/public-domain/tz/dist/NEWS up to 1.1.1.29 external/public-domain/tz/dist/TZDATA_VERSION up to 1.19 external/public-domain/tz/dist/africa up to 1.1.1.22 external/public-domain/tz/dist/asia up to 1.1.1.25 external/public-domain/tz/dist/backward up to 1.1.1.11 external/public-domain/tz/dist/backzone up to 1.1.1.18 external/public-domain/tz/dist/europe up to 1.1.1.26 external/public-domain/tz/dist/leap-seconds.list up to 1.1.1.13 external/public-domain/tz/dist/leapseconds up to 1.1.1.15 external/public-domain/tz/dist/leapseconds.awk up to 1.1.1.10 external/public-domain/tz/dist/northamerica up to 1.1.1.25 external/public-domain/tz/dist/theory.html up to 1.1.1.10 external/public-domain/tz/dist/version up to 1.1.1.16 external/public-domain/tz/dist/zone.tab up to 1.1.1.18 external/public-domain/tz/dist/zone1970.tab up to 1.1.1.20 doc/3RDPARTY (apply patch) distrib/sets/lists/base/mi (apply patch) Import tzdata2020a from ftp://ftp.iana.org/tz/releases/tzdata2020a.tar.gz Summary of changes in tzdata2020a (2020-04-23 16:03:47 -0700): Morocco resumes summer time on 2020-05-31, not 2020-05-24. Canada's Yukon advanced to -07 year-round on 2020-03-08 (summer time will not end this year).. America/Nuuk renamed from America/Godthab (both names now exist). @ text @d89 1 a89 1 # https://web.archive.org/web/20160517155308/http://www.clpgh.org/exhibit/dst.html d1473 1 a1473 2 # west Labrador, Nova Scotia, Prince Edward I, # Îles-de-la-Madeleine, Listuguj reserve a1491 7 # From Jeffery Nichols (2020-01-09): # America/Halifax ... also applies to Îles-de-la-Madeleine and the Listuguj # reserve in Quebec. Officially, this came into effect on January 1, 2007 # (Legal Time Act, CQLR c T-5.1), but the legislative debates surrounding that # bill say that it is "accommodating the customs and practices" of those # regions, which suggests that they have always been in-line with Halifax. d1585 1 a1585 1 # From Paul Eggert (2020-01-10): a1586 1 # See America/Halifax for the Îles de la Madeleine and the Listuguj reserve. d1593 1 a1593 1 # https://www.justice.gouv.qc.ca/en/department/ministre/functions-and-responsabilities/legal-time-in-quebec/the-situation-in-minganie-and-basse-cote-nord/ d1596 2 a1597 2 # This common practice was codified into law as of 2007; see Legal Time Act, # CQLR c T-5.1 . a1615 9 # From Jeffery Nichols (2020-02-06): # According to the [Shanks] atlas, those western Ontario zones are huge, # covering most of Ontario northwest of Sault Ste Marie and Timmins. # The zones seem to include towns bigger than the ones they're named after, # like Dryden in America/Rainy_River and Wawa (and maybe Attawapiskat) in # America/Nipigon. I assume it's too much trouble to change the name of the # zone (like when you found out that America/Glace_Bay includes Sydney, Nova # Scotia).... a2421 12 # From Tim Parenti (2020-03-05): # The government of Yukon announced [yesterday] the cessation of seasonal time # changes. "After clocks are pushed ahead one hour on March 8, the territory # will remain on [UTC-07]. ... [The government] found 93 per cent of # respondents wanted to end seasonal time changes and, of that group, 70 per # cent wanted 'permanent Pacific Daylight Saving Time.'" # https://www.cbc.ca/news/canada/north/yukon-end-daylight-saving-time-1.5486358 # # Although the government press release prefers PDT, we prefer MST for # consistency with nearby Dawson Creek, Creston, and Fort Nelson. # https://yukon.ca/en/news/yukon-end-seasonal-time-change d2476 1 a2476 2 -8:00 Canada P%sT 2020 Mar 8 2:00 -7:00 - MST d2480 1 a2480 2 -8:00 Canada P%sT 2020 Mar 8 2:00 -7:00 - MST @ 1.1.1.23.2.3 log @Pull up the following, requested by kre in #1108: external/public-domain/tz/dist/systemv delete external/public-domain/tz/dist/pacificnew delete external/public-domain/tz/dist/yearistype.sh delete external/public-domain/tz/dist/Makefile up to 1.1.1.27 external/public-domain/tz/dist/NEWS up to 1.1.1.30 external/public-domain/tz/dist/README up to 1.1.1.9 external/public-domain/tz/dist/TZDATA_VERSION up to 1.20 external/public-domain/tz/dist/africa up to 1.1.1.23 external/public-domain/tz/dist/antarctica up to 1.1.1.13 external/public-domain/tz/dist/asia up to 1.1.1.26 external/public-domain/tz/dist/australasia up to 1.1.1.19 external/public-domain/tz/dist/backzone up to 1.1.1.19 external/public-domain/tz/dist/europe up to 1.1.1.27 external/public-domain/tz/dist/leap-seconds.list up to 1.1.1.14 external/public-domain/tz/dist/leapseconds up to 1.1.1.16 external/public-domain/tz/dist/leapseconds.awk up to 1.1.1.11 external/public-domain/tz/dist/northamerica up to 1.1.1.26 external/public-domain/tz/dist/southamerica up to 1.1.1.17 external/public-domain/tz/dist/theory.html up to 1.1.1.11 external/public-domain/tz/dist/version up to 1.1.1.17 external/public-domain/tz/dist/zishrink.awk up to 1.1.1.7 external/public-domain/tz/dist/zoneinfo2tdf.pl up to 1.1.1.4 external/public-domain/tz/share/zoneinfo/Makefile 1.4 distrib/sets/lists/base/mi 1.1266 doc/3RDPARTY 1.1750 (patch) Import tzdata2020b: Revised predictions for Morocco's changes starting in 2023. Canada's Yukon changes to -07 on 2020-11-01, not 2020-03-08. Macquarie Island has stayed in sync with Tasmania since 2011. Casey, Antarctica is at +08 in winter and +11 in summer. @ text @d173 1 a173 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d350 1 a350 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d434 1 a434 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d503 1 a503 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d556 1 a556 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d914 1 a914 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d933 1 a933 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d952 1 a952 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d977 1 a977 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d994 1 a994 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d1015 1 a1015 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d1032 1 a1032 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d1074 1 a1074 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d1188 1 a1188 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d1205 1 a1205 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d1375 1 a1375 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d1398 1 a1398 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d1500 1 a1500 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d1566 1 a1566 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d1775 1 a1775 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d1873 1 a1873 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d1964 1 a1964 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d2014 1 a2014 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d2123 1 a2123 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d2452 1 a2452 13 # From Andrew G. Smith (2020-09-24): # Yukon has completed its regulatory change to be on UTC -7 year-round.... # http://www.gov.yk.ca/legislation/regs/oic2020_125.pdf # What we have done is re-defined Yukon Standard Time, as we are # authorized to do under section 33 of our Interpretation Act: # http://www.gov.yk.ca/legislation/acts/interpretation_c.pdf # # From Paul Eggert (2020-09-24): # tzdb uses the obsolete YST abbreviation for standard time in Yukon through # about 1970, and uses PST for standard time in Yukon since then. Consistent # with that, use MST for -07, the new standard time in Yukon effective Nov. 1. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d2506 1 a2506 1 -8:00 Canada P%sT 2020 Nov 1 d2511 1 a2511 1 -8:00 Canada P%sT 2020 Nov 1 d2726 1 a2726 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d2931 1 a2931 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d2943 1 a2943 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d2956 1 a2956 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d2993 1 a2993 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d3167 1 a3167 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d3236 1 a3236 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d3253 1 a3253 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d3282 1 a3282 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d3363 1 a3363 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d3411 1 a3411 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d3502 1 a3502 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S @ 1.1.1.23.2.4 log @Pull up the following, requested by kre in ticket #1243: external/public-domain/tz/dist/Makefile up to 1.1.1.30 external/public-domain/tz/dist/NEWS up to 1.1.1.34 external/public-domain/tz/dist/TZDATA_VERSION up to 1.24 external/public-domain/tz/dist/africa up to 1.1.1.25 external/public-domain/tz/dist/asia up to 1.1.1.28 external/public-domain/tz/dist/australasia up to 1.1.1.21 external/public-domain/tz/dist/backward up to 1.1.1.12 external/public-domain/tz/dist/backzone up to 1.1.1.20 external/public-domain/tz/dist/etcetera up to 1.1.1.5 external/public-domain/tz/dist/europe up to 1.1.1.30 external/public-domain/tz/dist/leap-seconds.list up to 1.1.1.15 external/public-domain/tz/dist/leapseconds up to 1.1.1.18 external/public-domain/tz/dist/leapseconds.awk up to 1.1.1.12 external/public-domain/tz/dist/northamerica up to 1.1.1.27 external/public-domain/tz/dist/theory.html up to 1.1.1.12 external/public-domain/tz/dist/version up to 1.1.1.21 external/public-domain/tz/dist/ziguard.awk up to 1.1.1.6 external/public-domain/tz/dist/zone.tab up to 1.1.1.19 external/public-domain/tz/dist/zone1970.tab up to 1.1.1.21 doc/3RDPARTY apply patch Import tzdata2020f from ftp://ftp.iana.org/tz/releases/tzdata2020f.tar.gz Release 2020f - 2020-12-29 00:17:46 -0800 No changes to tzdata, just to a part of the build procedure not used on NetBSD Release 2020e - 2020-12-22 15:14:34 -0800 Volgograd switched to Moscow time on 2020-12-27 at 02:00. Correct many pre-1986 transitions, fixing entries originally derived from Shanks. The fixes include changes to: Australia, Bahamas, Bermuda, Belize, Ghana, Israel and Palestine, Kenya and adjacent, Nigeria and adjacent, Seychelles, Vanuatu Australia/Currie has been moved to the 'backward' file and its corrected data moved to the 'backzone' file. To better match legislation in Turks and Caicos, the 2015 shift to year-round observance of -04 is now modeled as AST throughout before returning to Eastern Time with US DST in 2018, rather than as maintaining EDT until 2015-11-01. @ text @d2237 1 a2237 1 # https://mm.icann.org/pipermail/tz/attachments/20201125/d5adc93b/CAYTOIC1980-02DST1980-01-04-0001.pdf a2937 21 # From P Chan (2020-11-27, corrected on 2020-12-02): # There were two periods of DST observed in 1942-1945: 1942-05-01 # midnight to 1944-12-31 midnight and 1945-02-01 to 1945-10-17 midnight. # "midnight" should mean 24:00 from the context. # # War Time Order 1942 [1942-05-01] and War Time (No. 2) Order 1942 [1942-09-29] # Appendix to the Statutes of 7 George VI. and the Year 1942. p 34, 43 # https://books.google.com/books?id=5rlNAQAAIAAJ&pg=RA3-PA34 # https://books.google.com/books?id=5rlNAQAAIAAJ&pg=RA3-PA43 # # War Time Order 1943 [1943-03-31] and War Time Order 1944 [1943-12-29] # Appendix to the Statutes of 8 George VI. and the Year 1943. p 9-10, 28-29 # https://books.google.com/books?id=5rlNAQAAIAAJ&pg=RA4-PA9 # https://books.google.com/books?id=5rlNAQAAIAAJ&pg=RA4-PA28 # # War Time Order 1945 [1945-01-31] and the Order which revoke War Time Order # 1945 [1945-10-16] Appendix to the Statutes of 9 George VI. and the Year # 1945. p 160, 247-248 # https://books.google.com/books?id=5rlNAQAAIAAJ&pg=RA6-PA160 # https://books.google.com/books?id=5rlNAQAAIAAJ&pg=RA6-PA247 # a2943 5 Rule Bahamas 1942 only - May 1 24:00 1:00 W Rule Bahamas 1944 only - Dec 31 24:00 0 S Rule Bahamas 1945 only - Feb 1 0:00 1:00 W Rule Bahamas 1945 only - Aug 14 23:00u 1:00 P # Peace Rule Bahamas 1945 only - Oct 17 24:00 0 S d2967 1 a2967 36 # From P Chan (2020-11-03): # Below are some laws related to the time in British Honduras/Belize: # # Definition of Time Ordinance, 1927 (No.4 of 1927) [1927-04-01] # Ordinances of British Honduras Passed in the Year 1927, p 19-20 # https://books.google.com/books?id=LqEpAQAAMAAJ&pg=RA3-PA19 # # Definition of Time (Amendment) Ordinance, 1942 (No. 5 of 1942) [1942-06-27] # Ordinances of British Honduras Passed in the Year 1942, p 31-32 # https://books.google.com/books?id=h6MpAQAAMAAJ&pg=RA6-PA95-IA44 # # Definition of Time Ordinance, 1945 (No. 19 of 1945) [1945-12-15] # Ordinances of British Honduras Passed in the Year 1945, p 49-50 # https://books.google.com/books?id=xaMpAQAAMAAJ&pg=RA2-PP1 # # Definition of Time Ordinance, 1947 (No. 1 of 1947) [1947-03-11] # Ordinances of British Honduras Passed in the Year 1947, p 1-2 # https://books.google.com/books?id=xaMpAQAAMAAJ&pg=RA3-PA1 # # Time (Definition of) Ordinance (Chapter 180) # The Laws of British Honduras in Force on the 15th Day of September, 1958 , Volume IV, p 2580 # https://books.google.com/books?id=v5QpAQAAMAAJ&pg=PA2580 # # Time (Definition of) (Amendment) Ordinance, 1968 (No. 13 of 1968) [1968-08-03] # https://books.google.com/books?id=xij7KEB_58wC&pg=RA1-PA428-IA9 # # Definition of Time Act (Chapter 339) # Law of Belize, Revised Edition 2000 # http://www.belizelaw.org/web/lawadmin/PDF%20files/cap339.pdf # From Paul Eggert (2020-11-03): # The transitions below are derived from P Chan's sources, except that the # 1973 through 1983 transitions are from Shanks & Pottenger since we have # no better data there. d2969 2 a2970 7 Rule Belize 1918 1941 - Oct Sat>=1 24:00 0:30 -0530 Rule Belize 1919 1942 - Feb Sat>=8 24:00 0 CST Rule Belize 1942 only - Jun 27 24:00 1:00 CWT Rule Belize 1945 only - Aug 14 23:00u 1:00 CPT Rule Belize 1945 only - Dec 15 24:00 0 CST Rule Belize 1947 1967 - Oct Sat>=1 24:00 0:30 -0530 Rule Belize 1948 1968 - Feb Sat>=8 24:00 0 CST d2976 1 a2976 1 Zone America/Belize -5:52:48 - LMT 1912 Apr 1 a2980 1 # From Paul Eggert (2020-11-24): d2982 1 a2982 69 # Bermuda dockyard, Ireland I. This agrees with standard offset given in the # Daylight Saving Act, 1917 cited below. Round that to the nearest second. # It is not known when this time became standard for Bermuda; guess 1890. # The transition to -04 was specified by: # 1930: The Time Zone Act, 1929 (1929: No. 39) [1929-11-08] # https://books.google.com/books?id=7tdMAQAAIAAJ&pg=RA54-PP1 # From P Chan (2020-11-20): # Most of the information can be found online from the Bermuda National # Library - Digital Collection which includes The Royal Gazette (RG) until 1957 # https://bnl.contentdm.oclc.org/digital/ # I will cite the ID. For example, [10000] means # https://bnl.contentdm.oclc.org/digital/collection/BermudaNP02/id/10000 # # 1917: Apr 5 midnight to Sep 30 midnight # Daylight Saving Act, 1917 (1917 No. 13) [1917-04-02] # Bermuda Acts and Resolves 1917, p 37-38 # https://books.google.com/books?id=M-lCAQAAMAAJ&pg=PA36-IA2 # RG, 1917-04-04, p 6 [42340] gives the spring forward date. # # 1918: Apr 13 midnight to Sep 15 midnight # Daylight Saving Act, 1918 (1918 No. 9) [1918-04-06] # Bermuda Acts and Resolves 1917, p 13 # https://books.google.com/books?id=K-lCAQAAMAAJ&pg=RA1-PA7 # # Note that local mean time was still used before 1930. # # During WWII, DST was introduced by Defence Regulations # 1942: Jan 11 02:00 to Oct 18 02:00 [113646], [115726] # 1943: Mar 21 02:00 to Oct 31 02:00 [116704], [118193] # 1944: Mar 12 02:00 to Nov 5 02:00 [119225], [121593] # 1945: Mar 11 02:00 to Nov 4 02:00 [122369], [124461] # RG, 1942-01-08, p 2, 1942-10-12, p 2 , 1943-03-06, p 2, 1943-09-03, p 1, # 1944-02-29, p 6, 1944-09-20, p 2, 1945-02-13, p 2, 1945-11-03, p 1 # # In 1946, the House of Assembly rejected DST twice. [128686], [128076] # RG, 1946-03-16 p 1,1946-04-13 p 1 # # 1947: third Sunday in May 02:00 to second Sunday in September 02:00 # DST in 1947 was defined in the Daylight Saving Act, 1947 (1947: No. 12) # which expired at the end of the year. [125784] ,[132405], [144454], [138226] # RG, 1947-02-27, p 1, 1947-05-15, p 1, 1947-09-13, p 1, 1947-12-30, p 1 # # 1948-1952: fourth Sunday in May 02:00 to first Sunday in September 02:00 # DST in 1948 was defined in the Daylight Saving Act, 1948 (1948 : No. 12) # which was set to expired at the end of the year but it was extended until # the end of 1952 and was not further extended. # [129802], [139403], [146008], [135240], [144330], [139049], [143309], # [148271], [149773], [153589], [153802], [155924] # RG, 1948-04-13, p 1, 1948-05-22, p 1, 1948-09-04, p 1, 1949-05-21, p1, # 1949-09-03, p 1, 1950-05-27 p 1, 1950-09-02, p 1, 1951-05-27, p 1, # 1951-09-01, p 1, 1952-05-23, p 1, 1952-09-26, p 1, 1952-12-21, p 8 # # In 1953-1955, the House of Assembly rejected DST each year. [158996], # [162620], [166720] RG, 1953-05-02, p 1, 1954-04-01 p 1, 1955-03-12, p 1 # # 1956: fourth Sunday in May 02:00 to last Sunday in October 02:00 # Time Zone (Seasonal Variation) Act, 1956 (1956: No.44) [1956-05-25] # Bermuda Public Acts 1956, p 331-332 # https://books.google.com/books?id=Xs1AlmD_cEwC&pg=PA63 # # The extension of the Act was rejected by the House of Assembly. [176218] # RG, 1956-12-13, p 1 # # From the Chronological Table of Public and Private Acts up to 1985, it seems # that there does not exist other Acts related to DST before 1973. # https://books.google.com/books?id=r9hMAQAAIAAJ&pg=RA23-PA1 # Public Acts of the Legislature of the Islands of Bermuda, Together with # Statutory Instruments in Force Thereunder, Vol VII d2985 1 a2991 18 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Bermuda 1917 only - Apr 5 24:00 1:00 - Rule Bermuda 1917 only - Sep 30 24:00 0 - Rule Bermuda 1918 only - Apr 13 24:00 1:00 - Rule Bermuda 1918 only - Sep 15 24:00 0 S Rule Bermuda 1942 only - Jan 11 2:00 1:00 D Rule Bermuda 1942 only - Oct 18 2:00 0 S Rule Bermuda 1943 only - Mar 21 2:00 1:00 D Rule Bermuda 1943 only - Oct 31 2:00 0 S Rule Bermuda 1944 1945 - Mar Sun>=8 2:00 1:00 D Rule Bermuda 1944 1945 - Nov Sun>=1 2:00 0 S Rule Bermuda 1947 only - May Sun>=15 2:00 1:00 D Rule Bermuda 1947 only - Sep Sun>=8 2:00 0 S Rule Bermuda 1948 1952 - May Sun>=22 2:00 1:00 D Rule Bermuda 1948 1952 - Sep Sun>=1 2:00 0 S Rule Bermuda 1956 only - May Sun>=22 2:00 1:00 D Rule Bermuda 1956 only - Oct lastSun 2:00 0 S d2993 2 a2994 3 Zone Atlantic/Bermuda -4:19:18 - LMT 1890 # Hamilton -4:19:18 Bermuda BMT/BST 1930 Jan 1 2:00 -4:00 Bermuda A%sT 1974 Apr 28 2:00 d3577 1 a3577 1 d3592 1 a3598 24 # From P Chan (2020-11-27): # Standard Time Declaration Order 2015 (L.N. 15/2015) # http://online.fliphtml5.com/fizd/czin/#p=2 # # Standard Time Declaration Order 2017 (L.N. 31/2017) # http://online.fliphtml5.com/fizd/dmcu/#p=2 # # From Tim Parenti (2020-12-05): # Although L.N. 31/2017 reads that it "shall come into operation at 2:00 a.m. # on 11th March 2018", a precise interpretation here poses some problems. The # order states that "the standard time to be observed throughout the Turks and # Caicos Islands shall be the same time zone as the Eastern United States of # America" and further clarifies "[f]or the avoidance of doubt" that it # "applies to the Eastern Standard Time as well as any changes thereto for # Daylight Saving Time." However, as clocks in Turks and Caicos approached # 02:00 -04, and thus the declared implementation time, it was still 01:00 EST # (-05), as DST in the Eastern US would not start until an hour later. # # Since it is unlikely that those on the islands switched their clocks twice in # the span of an hour, we assume instead that the adoption of EDT actually took # effect once clocks in the Eastern US had sprung forward, from 03:00 -04. # This discrepancy only affects the time zone abbreviation and DST flag for the # intervening hour, not wall clock times, as -04 was maintained throughout. d3603 2 a3604 2 -5:00 US E%sT 2015 Mar 8 2:00 -4:00 - AST 2018 Mar 11 3:00 @ 1.1.1.23.2.5 log @Pull up the following, requested by kre in ticket #1546: Catch up to -current of external/public-domain/tz/dist and apply corresponding patches to distrib/sets/lists/base/mi and doc/3RDPARTY: external/public-domain/tz/dist/SECURITY up to 1.1.1.1 external/public-domain/tz/dist/CONTRIBUTING up to 1.1.1.7 external/public-domain/tz/dist/Makefile up to 1.1.1.33 external/public-domain/tz/dist/NEWS up to 1.1.1.38 external/public-domain/tz/dist/README up to 1.1.1.10 external/public-domain/tz/dist/TZDATA_VERSION up to 1.30 external/public-domain/tz/dist/africa up to 1.1.1.28 external/public-domain/tz/dist/antarctica up to 1.1.1.15 external/public-domain/tz/dist/asia up to 1.5 external/public-domain/tz/dist/australasia up to 1.5 external/public-domain/tz/dist/backward up to 1.5 external/public-domain/tz/dist/backzone up to 1.1.1.23 external/public-domain/tz/dist/calendars up to 1.1.1.2 external/public-domain/tz/dist/checktab.awk up to 1.1.1.11 external/public-domain/tz/dist/etcetera up to 1.1.1.6 external/public-domain/tz/dist/europe up to 1.1.1.34 external/public-domain/tz/dist/leap-seconds.list up to 1.4 external/public-domain/tz/dist/leapseconds up to 1.4 external/public-domain/tz/dist/northamerica up to 1.1.1.30 external/public-domain/tz/dist/southamerica up to 1.1.1.20 external/public-domain/tz/dist/theory.html up to 1.1.1.15 external/public-domain/tz/dist/version up to 1.5 external/public-domain/tz/dist/ziguard.awk up to 1.1.1.9 external/public-domain/tz/dist/zishrink.awk up to 1.1.1.8 external/public-domain/tz/dist/zone.tab up to 1.1.1.22 external/public-domain/tz/dist/zone1970.tab up to 1.1.1.23 distrib/sets/lists/base/mi (apply patch) doc/3RDPARTY (apply patch) Update timezone data to 2022e. @ text @d347 2 a348 1 # Eastern time (i.e., -4:56:01.6) just before the 1883 switch. d357 1 a357 2 #STDOFF -4:56:01.6 Zone America/New_York -4:56:02 - LMT 1883 Nov 18 17:00u d442 1 a442 1 Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 18:00u d451 1 a451 1 Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 19:00u d461 1 a461 1 Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 19:00u d478 1 a478 1 Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 19:00u d510 1 a510 1 Zone America/Denver -6:59:56 - LMT 1883 Nov 18 19:00u d563 1 a563 1 Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 20:00u d732 1 a732 5 # The following switches don't make our 1970 cutoff. # # Kiska observed Tokyo date and time during Japanese occupation from # 1942-06-06 to 1943-07-29, and similarly for Attu from 1942-06-07 to # 1943-05-29 (all dates American). Both islands are now uninhabited. d821 1 a821 1 Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 19:00u a827 1 d847 1 a847 1 Zone America/Boise -7:44:49 - LMT 1883 Nov 18 20:00u d919 1 a919 1 Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 18:00u d939 1 a939 1 Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 18:00u d963 1 a963 1 Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 18:00u d973 1 a973 1 # From Alois Treindl (2019-07-09): d983 1 a983 1 Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 18:00u d1000 1 a1000 1 Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 18:00u d1022 1 a1022 1 Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 18:00u d1038 1 a1038 1 Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 18:00u d1049 1 a1049 1 Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 18:00u d1085 1 a1085 1 Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 18:00u d1119 1 a1119 1 Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 18:00u d1594 1 d1596 14 d1652 48 a1844 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] a1849 1 #PACKRATLIST zone.tab Link America/Atikokan America/Coral_Harbour d2001 1 a2001 1 # From Alois Treindl (2019-07-19): d2040 54 d2110 1 a2110 1 # Alois Treindl confirmed this on 07-22, citing the 1946-04-27 Vancouver Daily a2146 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] a2738 2 Rule Mexico 1931 only - May 1 23:00 1:00 D Rule Mexico 1931 only - Oct 1 0:00 0 S d2755 1 a2755 1 Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 6:00u d2761 1 a2761 1 Zone America/Merida -5:58:28 - LMT 1922 Jan 1 6:00u d2775 1 a2775 1 Zone America/Matamoros -6:30:00 - LMT 1922 Jan 1 6:00u d2781 1 a2781 1 Zone America/Monterrey -6:41:16 - LMT 1922 Jan 1 6:00u d2786 1 a2786 1 Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 7:00u d2789 3 a2791 1 -7:00 Mexico M%sT 1932 Apr 1 d2799 1 a2799 1 Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 7:00u d2802 3 a2804 1 -7:00 Mexico M%sT 1932 Apr 1 d2811 1 a2811 1 Zone America/Chihuahua -7:04:20 - LMT 1922 Jan 1 7:00u d2814 3 a2816 1 -7:00 Mexico M%sT 1932 Apr 1 d2822 1 a2822 1 Zone America/Hermosillo -7:23:52 - LMT 1922 Jan 1 7:00u d2825 3 a2827 1 -7:00 Mexico M%sT 1932 Apr 1 d2862 1 a2862 1 Zone America/Mazatlan -7:05:40 - LMT 1922 Jan 1 7:00u d2865 3 a2867 1 -7:00 Mexico M%sT 1932 Apr 1 d2874 1 a2874 1 Zone America/Bahia_Banderas -7:01:00 - LMT 1922 Jan 1 7:00u d2877 3 a2879 1 -7:00 Mexico M%sT 1932 Apr 1 d2887 1 a2887 1 Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 7:00u a2930 4 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Anguilla -4:12:16 - LMT 1912 Mar 2 -4:00 - AST d2932 1 a2932 4 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Antigua -4:07:12 - LMT 1912 Mar 2 -5:00 - EST 1951 -4:00 - AST d2934 29 a2963 1 # The Bahamas a2971 1 d2979 1 a2979 1 # For 1899 Milne gives -3:58:29.2. d2981 1 a2981 36 # From P Chan (2020-12-09 and 2020-12-11): # Standard time of GMT-4 was adopted in 1911. # Definition of Time Act, 1911 (1911-7) [1911-08-28] # 1912, Laws of Barbados (5 v.), OCLC Number: 919801291, Vol. 4, Image No. 522 # 1944, Laws of Barbados (5 v.), OCLC Number: 84548697, Vol. 4, Image No. 122 # http://llmc.com/browse.aspx?type=2&coll=85&div=297 # # DST was observed in 1942-44. # Defence (Daylight Saving) Regulations, 1942, 1942-04-13 # Defence (Daylight Saving) (Repeal) Regulations, 1942, 1942-08-22 # Defence (Daylight Saving) Regulations, 1943, 1943-04-16 # Defence (Daylight Saving) (Repeal) Regulations, 1943, 1943-09-01 # Defence (Daylight Saving) Regulations, 1944, 1944-03-21 # [Defence (Daylight Saving) (Amendment) Regulations 1944, 1944-03-28] # Defence (Daylight Saving) (Repeal) Regulations, 1944, 1944-08-30 # # 1914-, Subsidiary Legis., Annual Vols. OCLC Number: 226290591 # 1942: Image Nos. 527-528, 555-556 # 1943: Image Nos. 178-179, 198 # 1944: Image Nos. 113-115, 129 # http://llmc.com/titledescfull.aspx?type=2&coll=85&div=297&set=98437 # # From Tim Parenti (2021-02-20): # The transitions below are derived from P Chan's sources, except that the 1977 # through 1980 transitions are from Shanks & Pottenger since we have no better # data there. Of particular note, the 1944 DST regulation only advanced the # time to "exactly three and a half hours later than Greenwich mean time", as # opposed to "three hours" in the 1942 and 1943 regulations. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Barb 1942 only - Apr 19 5:00u 1:00 D Rule Barb 1942 only - Aug 31 6:00u 0 S Rule Barb 1943 only - May 2 5:00u 1:00 D Rule Barb 1943 only - Sep 5 6:00u 0 S Rule Barb 1944 only - Apr 10 5:00u 0:30 - Rule Barb 1944 only - Sep 10 6:00u 0 S d2988 2 a2989 4 #STDOFF -3:58:29.2 Zone America/Barbados -3:58:29 - LMT 1911 Aug 28 # Bridgetown -4:00 Barb A%sT 1944 -4:00 Barb AST/-0330 1945 d3047 1 a3047 1 # From Paul Eggert (2022-07-27): d3050 1 a3050 1 # Daylight Saving Act, 1917 cited below. a3144 1 #STDOFF -4:19:18.3 a3150 3 # Caribbean Netherlands # See America/Kralendijk in southamerica. d3152 1 a3152 4 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown -5:07:10 - KMT 1912 Feb # Kingston Mean Time -5:00 - EST d3156 1 a3156 1 # Milne gives -5:36:13.3 as San José mean time. a3167 1 #STDOFF -5:36:13.3 d3379 1 a3379 4 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau -4:00 - AST a3427 4 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Grenada -4:07:00 - LMT 1911 Jul # St George's -4:00 - AST a3428 4 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe-à-Pitre -4:00 - AST a3429 1 # See America/St_Barthelemy in southamerica. d3431 1 a3431 1 # See America/Marigot in southamerica. d3590 1 a3590 1 # island". Go with Milne. a3602 1 #STDOFF -5:07:10.41 d3618 1 a3618 4 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Cork Hill -4:00 - AST d3690 1 a3700 4 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre -4:00 - AST d3702 1 a3702 5 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/St_Lucia -4:04:00 - LMT 1890 # Castries -4:04:00 - CMT 1912 # Castries Mean Time -4:00 - AST d3713 1 a3713 8 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown -4:04:56 - KMT 1912 # Kingstown Mean Time -4:00 - AST # Sint Maarten # See America/Lower_Princes in southamerica. a3776 1 #STDOFF -5:07:10.41 d3784 2 a3785 9 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town -4:00 - AST # US Virgin Is # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie -4:00 - AST @ 1.1.1.23.2.6 log @Pull up the following, requested by kre in ticket #1782: external/public-domain/tz/dist/checknow.awk up to 1.1.1.1 external/public-domain/tz/dist/zonenow.tab up to 1.1.1.1 external/public-domain/tz/dist/CONTRIBUTING up to 1.1.1.8 external/public-domain/tz/dist/Makefile up to 1.1.1.37 external/public-domain/tz/dist/NEWS up to 1.1.1.44 external/public-domain/tz/dist/README up to 1.1.1.11 external/public-domain/tz/dist/TZDATA_VERSION up to 1.36 external/public-domain/tz/dist/africa up to 1.1.1.32 external/public-domain/tz/dist/antarctica up to 1.1.1.18 external/public-domain/tz/dist/asia up to 1.11 external/public-domain/tz/dist/australasia up to 1.8 external/public-domain/tz/dist/backward up to 1.11 external/public-domain/tz/dist/backzone up to 1.1.1.27 external/public-domain/tz/dist/checklinks.awk up to 1.1.1.4 external/public-domain/tz/dist/checktab.awk up to 1.1.1.13 external/public-domain/tz/dist/etcetera up to 1.1.1.7 external/public-domain/tz/dist/europe up to 1.1.1.38 external/public-domain/tz/dist/iso3166.tab up to 1.1.1.9 external/public-domain/tz/dist/leap-seconds.list up to 1.6 external/public-domain/tz/dist/leapseconds up to 1.6 external/public-domain/tz/dist/leapseconds.awk up to 1.1.1.13 external/public-domain/tz/dist/northamerica up to 1.1.1.34 external/public-domain/tz/dist/southamerica up to 1.1.1.24 external/public-domain/tz/dist/theory.html up to 1.1.1.18 external/public-domain/tz/dist/version up to 1.11 external/public-domain/tz/dist/ziguard.awk up to 1.1.1.10 external/public-domain/tz/dist/zone.tab up to 1.1.1.26 external/public-domain/tz/dist/zone1970.tab up to 1.1.1.27 distrib/sets/lists/base/mi (apply patch) doc/3RDPARTY (apply patch) Update tzdata to 2023d. @ text @d279 2 a280 2 # From Paul Eggert (2023-01-23), from a 2001-01-08 heads-up from Rives McDow: # Public law 106-564 (2000-12-23) introduced "Chamorro standard time" a281 1 # Also see 15 U.S.C. §263 . d598 1 a598 1 # One opinion of the early 1980s turmoil in Alaska over time zones and a669 4 # From Paul Eggert (2023-01-23): # America/Adak is for the Aleutian Islands that are part of Alaska # and are west of 169.5° W. d1451 1 a1451 1 # St John's has an apostrophe, but POSIX file names can't have apostrophes. a1598 1 # See America/Toronto for most of Quebec, including Montreal. a1599 1 # See America/Puerto_Rico for east of Natashquan. d1607 17 d1644 11 d1662 4 a1665 2 # ... I don't know if Windsor began observing DST when Detroit did, # or in 1974, or on some other date. d1747 17 d1772 15 a2044 31 # From Chris Walton (2022-11-06): # Whitehorse Star - Thursday April 22, 1965 - page 1 # title: DST Starts Monday ... # https://www.newspapers.com/image/578587481/ # The title of this first article is wrong and/or misleading. # Also, the start time shown in the article is vague; it simply says "after # midnight" when it probably should have stated 2:00a.m.... # # Whitehorse Star - Monday October 25, 1965 - page 15 ... # https://www.newspapers.com/image/578589147/ # The 1965 Yukon Council minutes can be found here: # http://assets.yukonarchives.ca/PER_YG_06_1965_C20_S02_v1.pdf # ... I do not currently believe that NWT touched any of its clocks in 1965.... # # Whitehorse Star - Thursday Feb 24,1966 - page 2 # title: It's Time for YDT ... # https://www.newspapers.com/image/578575979/ ... # America/Whitehorse as a permanent change from UTC-9(YST) to # UTC-8(PST) at 00:00 on Sunday February 27, 1966.... # # Whitehorse Star - Friday April 28,1972 - page 6 # title: Daylight Saving Time for N.W.T.... # https://www.newspapers.com/image/578701610/ ... # Nunavut and NWT zones ... DST starting in 1972.... Start and End ... # should be the same as the rest of Canada # # # From Paul Eggert (2022-11-06): # For now, assume Yukon's 1965-04-22 spring forward was 00:00 -> 02:00, as this # seems likely than 02:00 -> 04:00 and matches "after midnight". a2158 7 # From Chris Walton (2022-11-06): # The 5th edition of the Atlas of Canada contains a time zone map that # shows both legislated and observed time zone boundaries. # All communities on Baffin Island are shown to be observing Eastern time. # The date on the map is 1984. # https://ftp.maps.canada.ca/pub/nrcan_rncan/raster/atlas_5_ed/eng/other/referencemaps/mcr4056.pdf d2163 4 d2171 34 a2204 1 # (1999) reports that ... Coral Harbour does not observe DST. d2363 4 a2366 2 Rule NT_YK 1972 1986 - Apr lastSun 2:00 1:00 D Rule NT_YK 1972 2006 - Oct lastSun 2:00 0 S a2367 2 Rule Yukon 1965 only - Apr lastSun 0:00 2:00 DD Rule Yukon 1965 only - Oct lastSun 2:00 0 S d2369 6 d2399 3 d2407 2 a2408 3 -9:00 NT_YK Y%sT 1965 -9:00 Yukon Y%sT 1966 Feb 27 0:00 -8:00 - PST 1980 d2412 2 a2413 3 -9:00 NT_YK Y%sT 1965 -9:00 Yukon Y%sT 1973 Oct 28 0:00 -8:00 - PST 1980 a2628 14 # From Paul Eggert (2022-10-28): # The new Mexican law was published today: # https://www.dof.gob.mx/nota_detalle.php?codigo=5670045&fecha=28/10/2022 # This abolishes DST except where US DST rules are observed, # and in addition changes all of Chihuahua to -06 with no DST. # From Heitor David Pinto (2022-11-28): # Now the northern [municipios] want to have the same time zone as the # respective neighboring cities in the US, for example Juárez in UTC-7 with # DST, matching El Paso, and Ojinaga in UTC-6 with DST, matching Presidio.... # the president authorized the publication of the decree for November 29, # so the time change would occur on November 30 at 0:00. # http://puentelibre.mx/noticia/ciudad_juarez_cambio_horario_noviembre_2022/ d2644 2 a2645 2 Rule Mexico 2002 2022 - Apr Sun>=1 2:00 1:00 D Rule Mexico 2002 2022 - Oct lastSun 2:00 0 S d2659 4 a2662 4 # This includes the following municipios: # in Coahuila: Acuña, Allende, Guerrero, Hidalgo, Jiménez, Morelos, Nava, # Ocampo, Piedras Negras, Villa Unión, Zaragoza # in Nuevo León: Anáhuac d2665 3 a2667 1 # https://www.dof.gob.mx/nota_detalle.php?codigo=5670045&fecha=28/10/2022 d2686 5 a2690 5 # Chihuahua (near US border - western side) # This includes the municipios of Janos, Ascensión, Juárez, Guadalupe, and # Práxedis G Guerrero. # http://gaceta.diputados.gob.mx/PDF/65/2a022/nov/20221124-VII.pdf Zone America/Ciudad_Juarez -7:05:56 - LMT 1922 Jan 1 7:00u a2697 2 -7:00 US M%sT 2022 Oct 30 2:00 -6:00 - CST 2022 Nov 30 0:00 a2698 15 # Chihuahua (near US border - eastern side) # This includes the municipios of Coyame del Sotol, Ojinaga, and Manuel # Benavides. # http://gaceta.diputados.gob.mx/PDF/65/2a022/nov/20221124-VII.pdf Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 7:00u -7:00 - MST 1927 Jun 10 23:00 -6:00 - CST 1930 Nov 15 -7:00 Mexico M%sT 1932 Apr 1 -6:00 - CST 1996 -6:00 Mexico C%sT 1998 -6:00 - CST 1998 Apr Sun>=1 3:00 -7:00 Mexico M%sT 2010 -7:00 US M%sT 2022 Oct 30 2:00 -6:00 - CST 2022 Nov 30 0:00 -6:00 US C%sT d2707 1 a2707 2 -7:00 Mexico M%sT 2022 Oct 30 2:00 -6:00 - CST a2718 12 # Baja California Sur, Nayarit (except Bahía de Banderas), Sinaloa Zone America/Mazatlan -7:05:40 - LMT 1922 Jan 1 7:00u -7:00 - MST 1927 Jun 10 23:00 -6:00 - CST 1930 Nov 15 -7:00 Mexico M%sT 1932 Apr 1 -6:00 - CST 1942 Apr 24 -7:00 - MST 1949 Jan 14 -8:00 - PST 1970 -7:00 Mexico M%sT # Bahía de Banderas d2746 11 a2804 4 # From Paul Eggert (2022-10-28): # Today's new law states that the entire state of Baja California # follows US DST rules, which agrees with simplifications noted above. # d2816 1 a2816 1 # Antigua & Barbuda d2822 1 d3137 1 a3137 1 # http://www.prensalatina.com.mx/article.asp?ID={4CC32C1B-A9F7-42FB-8A07-8631AFC923AF}&language=ES d3289 1 a3347 1 d3541 1 d3632 1 d3641 1 a3641 1 # St Vincent & the Grenadines d3647 1 d3730 2 @ 1.1.1.23.2.7 log @Pullup the following, requested by kre in ticket #1796: external/public-domain/tz/dist/Makefile up to 1.1.1.38 external/public-domain/tz/dist/NEWS up to 1.1.1.45 external/public-domain/tz/dist/TZDATA_VERSION up to 1.37 external/public-domain/tz/dist/africa up to 1.1.1.33 external/public-domain/tz/dist/asia up to 1.12 external/public-domain/tz/dist/australasia up to 1.9 external/public-domain/tz/dist/checknow.awk up to 1.1.1.2 external/public-domain/tz/dist/etcetera up to 1.1.1.8 external/public-domain/tz/dist/europe up to 1.1.1.39 external/public-domain/tz/dist/leap-seconds.list up to 1.7 external/public-domain/tz/dist/leapseconds up to 1.7 external/public-domain/tz/dist/leapseconds.awk up to 1.1.1.14 external/public-domain/tz/dist/northamerica up to 1.1.1.35 external/public-domain/tz/dist/southamerica up to 1.1.1.25 external/public-domain/tz/dist/theory.html up to 1.1.1.19 external/public-domain/tz/dist/version up to 1.12 external/public-domain/tz/dist/zishrink.awk up to 1.1.1.9 external/public-domain/tz/dist/zonenow.tab up to 1.1.1.2 doc/3RDPARTY apply patch Updated tzdata to 2024a @ text @a1270 4 # For the 1911/1912 establishment of standard time in French possessions, see: # Société Française de Physique, Recueil de constantes physiques (1913), # page 752, 18b. # d1357 1 a1357 1 # https://web.archive.org/web/19990827055050/https://canadiangeographic.ca/SO98/geomap.htm a1648 9 # From Chris Walton (2024-01-09): # The [Toronto] changes in 1947, 1948, and 1949 took place at 2:00 a.m. local # time instead of midnight.... Toronto Daily Star - ... # April 2, 1947 - Page 39 ... April 7, 1948 - Page 13 ... # April 2, 1949 - Page 1 ... April 7, 1949 - Page 24 ... # November 25, 1949 - Page 52 ... April 21, 1950 - Page 14 ... # September 19, 1950 - Page 46 ... September 20, 1950 - Page 3 ... # November 24, 1950 - Page 21 d1710 7 a1716 3 Rule Toronto 1945 1948 - Sep lastSun 2:00 0 S Rule Toronto 1946 1973 - Apr lastSun 2:00 1:00 D Rule Toronto 1949 1950 - Nov lastSun 2:00 0 S d3504 1 a3504 1 -4:04:20 - FFMT 1911 May 1 # Fort-de-France MT d3607 1 a3607 1 Zone America/Miquelon -3:44:40 - LMT 1911 Jun 15 # St Pierre @ 1.1.1.23.2.8 log @Pull up the following revisions, requested by kre in ticket #1940: external/public-domain/tz/dist/zoneinfo2tdf.pl delete external/public-domain/tz/dist/CONTRIBUTING up to 1.1.1.9 external/public-domain/tz/dist/Makefile up to 1.3 external/public-domain/tz/dist/NEWS up to 1.3 external/public-domain/tz/dist/TZDATA_VERSION up to 1.41 external/public-domain/tz/dist/africa up to 1.2 external/public-domain/tz/dist/antarctica up to 1.3 external/public-domain/tz/dist/asia up to 1.14 external/public-domain/tz/dist/australasia up to 1.11 external/public-domain/tz/dist/backward up to 1.12 external/public-domain/tz/dist/backzone up to 1.2 external/public-domain/tz/dist/checknow.awk up to 1.3 external/public-domain/tz/dist/checktab.awk up to 1.3 external/public-domain/tz/dist/etcetera up to 1.3 external/public-domain/tz/dist/europe up to 1.3 external/public-domain/tz/dist/factory up to 1.3 external/public-domain/tz/dist/leap-seconds.list up to 1.9 external/public-domain/tz/dist/leapseconds up to 1.9 external/public-domain/tz/dist/northamerica up to 1.3 external/public-domain/tz/dist/southamerica up to 1.3 external/public-domain/tz/dist/theory.html up to 1.3 external/public-domain/tz/dist/version up to 1.14 external/public-domain/tz/dist/ziguard.awk up to 1.1.1.11 external/public-domain/tz/dist/zone.tab up to 1.3 external/public-domain/tz/dist/zone1970.tab up to 1.3 external/public-domain/tz/dist/zonenow.tab up to 1.3 distrib/sets/lists/base/mi (apply patch) doc/3RDPARTY (apply patch) Updated tzdata to 2025b (using 2025btgz) @ text @d30 1 a30 1 # From Paul Eggert (2024-11-18): d32 1 a32 4 # lines between time zones. Sandford Fleming of the Canadian Pacific Railway # argued for Dowd's proposal in 1876, and Cleveland Abbe of the American # Meteorology Society published a report in 1879 recommending four US time # zones based on GMT. However, the key individual who made time zones d188 20 a2388 75 # From Heitor David Pinto (2024-08-04): # In 1931, the decree implementing DST specified that it would take # effect on 30 April.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=192270&pagina=2&seccion=1 # # In 1981, the decree changing Campeche, Yucatán and Quintana Roo to UTC-5 # specified that it would enter into force on 26 December 1981 at 2:00.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4705667&fecha=23/12/1981&cod_diario=202796 # # In 1982, the decree returning Campeche and Yucatán to UTC-6 specified that # it would enter into force on 2 November 1982 at 2:00.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=205689&pagina=3&seccion=0 # # Quintana Roo changed to UTC-6 on 4 January 1983 at 0:00, and again # to UTC-5 on 26 October 1997 at 2:00.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4787355&fecha=28/12/1982&cod_diario=206112 # https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=209559&pagina=15&seccion=0 # # Durango, Coahuila, Nuevo León and Tamaulipas were set to UTC-7 on 1 January # 1922, and changed to UTC-6 on 10 June 1927. Then Durango, Coahuila and # Nuevo León (but not Tamaulipas) returned to UTC-7 on 15 November 1930, # observed DST in 1931, and changed again to UTC-6 on 1 April 1932.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4441846&fecha=29/12/1921&cod_diario=187468 # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4541520&fecha=09/06/1927&cod_diario=193920 # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4491963&fecha=15/11/1930&cod_diario=190835 # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4418437&fecha=21/01/1932&cod_diario=185588 # # ... the ... 10 June 1927 ... decree only said 10 June 1927, without # specifying a time, so I suppose that it should be considered at 0:00. # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4541520&fecha=09/06/1927&cod_diario=193920 # # In 1942, the decree changing Baja California, Baja California Sur, Sonora, # Sinaloa and Nayarit to UTC-7 was published on 24 April, but it said that it # would apply from 1 April, so it's unclear when the change actually # occurred. The database currently shows 24 April 1942. # https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=192203&pagina=2&seccion=1 # # Baja California Sur, Sonora, Sinaloa and Nayarit never used UTC-8. The ... # 14 January 1949 ... change [to UTC-8] only occurred in Baja California. # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4515613&fecha=13/01/1949&cod_diario=192309 # # In 1945, the decree changing Baja California to UTC-8 specified that it # would take effect on the third day from its publication. # It was published on 12 November, so it would take effect on 15 November.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4555049&fecha=12/11/1945&cod_diario=194763 # # In 1948, the decree changing Baja California to UTC-7 specified that it # would take effect on "this date". The decree was made on 13 March, # but published on 5 April, so it's unclear when the change actually occurred. # The database currently shows 5 April 1948. # https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=188624&pagina=2&seccion=0 # # In 1949, the decree changing Baja California to UTC-8 was published on 13 # January, but it said that it would apply from 1 January, so it's unclear when # the change actually occurred. The database currently shows 14 January 1949. # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4515613&fecha=13/01/1949&cod_diario=192309 # # Baja California also observed UTC-7 from 1 May to 24 September 1950, # from 29 April to 30 September 1951 at 2:00, # and from 27 April to 28 September 1952 at 2:00.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4600403&fecha=29/04/1950&cod_diario=197505 # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4623553&fecha=23/09/1950&cod_diario=198805 # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4469444&fecha=27/04/1951&cod_diario=189317 # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4533868&fecha=10/03/1952&cod_diario=193465 # # All changes in Baja California from 1948 to 1952 match those in California, # on the same dates or with a difference of one day. # So it may be easier to implement these changes as DST with rule CA # during this whole period. # # From Paul Eggert (2024-08-18): # For now, maintain the slightly-different history for Baja California, # as we have no information on whether 1948/1952 clocks in Tijuana followed # the decrees or followed San Diego. d2592 1 a2592 1 Rule Mexico 1931 only - Apr 30 0:00 1:00 D d2611 1 a2611 3 -6:00 - CST 1981 Dec 26 2:00 -5:00 - EST 1983 Jan 4 0:00 -6:00 Mexico C%sT 1997 Oct 26 2:00 d2617 2 a2618 2 -6:00 - CST 1981 Dec 26 2:00 -5:00 - EST 1982 Nov 2 2:00 a2634 3 -7:00 - MST 1927 Jun 10 -6:00 - CST 1930 Nov 15 -7:00 Mexico M%sT 1932 Apr 1 d2640 1 a2640 1 -7:00 - MST 1927 Jun 10 d2651 1 a2651 1 -7:00 - MST 1927 Jun 10 d2666 1 a2666 1 -7:00 - MST 1927 Jun 10 d2678 1 a2678 1 -7:00 - MST 1927 Jun 10 d2688 1 a2688 1 -7:00 - MST 1927 Jun 10 d2692 2 a2693 1 -7:00 - MST 1996 d2699 1 a2699 1 -7:00 - MST 1927 Jun 10 d2703 2 a2704 1 -7:00 - MST 1970 d2737 1 a2737 1 -7:00 - MST 1927 Jun 10 d2741 2 a2742 1 -7:00 - MST 1970 d2749 1 a2749 1 -8:00 - PST 1927 Jun 10 d2755 1 a2755 1 -8:00 1:00 PPT 1945 Nov 15 # Peace a2757 6 -8:00 - PST 1950 May 1 -8:00 1:00 PDT 1950 Sep 24 -8:00 - PST 1951 Apr 29 2:00 -8:00 1:00 PDT 1951 Sep 30 2:00 -8:00 - PST 1952 Apr 27 2:00 -8:00 1:00 PDT 1952 Sep 28 2:00 d3618 2 a3619 2 -3:00 - %z 1987 -3:00 Canada %z @ 1.1.1.23.2.9 log @Pull up following revision(s) (requested by kre in ticket #1940): external/public-domain/tz/dist/northamerica: revision 1.4 external/public-domain/tz/dist/version: revision 1.15 external/public-domain/tz/dist/asia: revision 1.15 external/public-domain/tz/dist/zonenow.tab: revision 1.4 external/public-domain/tz/dist/southamerica: revision 1.4 external/public-domain/tz/dist/zone1970.tab: revision 1.4 external/public-domain/tz/dist/NEWS: revision 1.4 external/public-domain/tz/dist/TZDATA_VERSION: revision 1.42 external/public-domain/tz/dist/zone.tab: revision 1.4 Merge tzdata2025b @ text @a1617 9 # From Paul Eggert (2025-03-20): # Also see the 1912-06-17 front page of The Evening Sunbeam, # reproduced in: Richardson M. "Daylight saving was a confusing # time in Orillia" in the 2025-03-15 Orillia Matters. Richardson writes, # "The first Sunday after the switch was made, [DST proponent and # Orillia mayor William Sword] Frost walked into church an hour late. # This became a symbol of the downfall of daylight saving in Orillia." # The mayor became known as "Daylight Bill". # https://www.orilliamatters.com/local-news/column-daylight-saving-was-a-confusing-time-in-orillia-10377529 @ 1.1.1.24 log @Import tzdata2019c from ftp://ftp.iana.org/tz/releases/tzdata2019c.tar.gz Summary of changes in tzdata2019c (2019-09-11 08:59:48 -0700): Fiji observes DST from 2019-11-10 to 2020-01-12 Norfolk Island starts observing Australian-style DST Plus historic corrections to time in Turkey (1940-85) South Korea (1948-51) Detroit (US) (1967-8), Perry County (Indiana, US) (pre 1970) Edmonton (CA) (1967, 1969) Vancouver (CA) (1946), Vienna (AT) (1946), Kaliningrad (1945-6). Louisville (US) (1946-50). Brussles (BE) (1892). Hong Kong Winter Time (1941) now listed as being "DST". Summary of changes in tzdata2019b (2019-07-01 00:09:53 -0700): Brazil no longer observes DST Predictions for Morocco extended to 2087. Panestine (March 2019) time zone change date corrected (and guesses for future transitions revised). Historic updates: Honk Kong (1941 - 1947), Italy (1866). @ text @d96 4 a99 27 # From Paul Eggert (2019-06-04): # Here is the legal basis for the US federal rules. # * Public Law 65-106 (1918-03-19) implemented standard and daylight saving # time for the first time across the US, springing forward on March's last # Sunday and falling back on October's last Sunday. # https://www.loc.gov/law/help/statutes-at-large/65th-congress/session-2/c65s2ch24.pdf # * Public Law 66-40 (1919-08-20) repealed DST on October 1919's last Sunday. # https://www.loc.gov/law/help/statutes-at-large/66th-congress/session-1/c66s1ch51.pdf # * Public Law 77-403 (1942-01-20) started wartime DST on 1942-02-09. # https://www.loc.gov/law/help/statutes-at-large/77th-congress/session-2/c77s2ch7.pdf # * Public Law 79-187 (1945-09-25) ended wartime DST on 1945-09-30. # https://www.loc.gov/law/help/statutes-at-large/79th-congress/session-1/c79s1ch388.pdf # * Public Law 89-387 (1966-04-13) reinstituted a national standard for DST, # from April's last Sunday to October's last Sunday, effective 1967. # https://www.govinfo.gov/content/pkg/STATUTE-80/pdf/STATUTE-80-Pg107.pdf # * Public Law 93-182 (1973-12-15) moved the 1974 spring-forward to 01-06. # https://www.govinfo.gov/content/pkg/STATUTE-87/pdf/STATUTE-87-Pg707.pdf # * Public Law 93-434 (1974-10-05) moved the 1975 spring-forward to # February's last Sunday. # https://www.govinfo.gov/content/pkg/STATUTE-88/pdf/STATUTE-88-Pg1209.pdf # * Public Law 99-359 (1986-07-08) moved the spring-forward to April's first # Sunday. # https://www.govinfo.gov/content/pkg/STATUTE-100/pdf/STATUTE-100-Pg764.pdf # * Public Law 109-58 (2005-08-08), effective 2007, moved the spring-forward # to March's second Sunday and the fall-back to November's first Sunday. # https://www.govinfo.gov/content/pkg/PLAW-109publ58/pdf/PLAW-109publ58.pdf # All transitions are at 02:00 local time. d155 1 a155 1 Rule US 1945 only - Sep 30 2:00 0 S d159 1 a159 1 Rule US 1975 only - Feb lastSun 2:00 1:00 D d176 1 a176 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d333 1 a333 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] a385 25 # From Paul Eggert (2015-04-06): # In 1950s Nashville a public clock had dueling faces, one for conservatives # and the other for liberals; the two sides didn't agree about the time of day. # I haven't found a photo of this clock, nor have I tracked down the TIME # magazine report cited below, but here's the story as told by the late # American journalist John Seigenthaler, who was there: # # "The two [newspaper] owners held strongly contrasting political and # ideological views. Evans was a New South liberal, Stahlman an Old South # conservative, and their two papers frequently clashed editorially, often on # the same day.... In the 1950s as the state legislature was grappling with # the question of whether to approve daylight saving time for the entire state, # TIME magazine reported: # # "'The Nashville Banner and The Nashville Tennessean rarely agree on anything # but the time of day - and last week they couldn't agree on that.' # # "It was all too true. The clock on the front of the building had two faces - # The Tennessean side of the building facing west, the other, east. When it # was high noon Banner time, it was 11 a.m. Tennessean time." # # Seigenthaler J. For 100 years, Tennessean had it covered. # The Tennessean 2007-05-11, republished 2015-04-06. # https://www.tennessean.com/story/insider/extras/2015/04/06/archives-seigenthaler-for-100-years-the-tennessean-had-it-covered/25348545/ d393 1 a393 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d461 1 a461 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d514 1 a514 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d622 1 a622 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d742 1 a742 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d772 1 a772 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d798 1 a798 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d870 1 a870 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d890 1 a890 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d914 1 a914 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] a924 4 # From Alois Triendl (2019-07-09): # The Indianapolis News, Friday 27 October 1967 states that Perry County # returned to CST. It went again to EST on 27 April 1969, as documented by the # Indianapolis star of Saturday 26 April. d926 4 a930 1 Rule Perry 1955 1960 - Sep lastSun 2:00 0 S d932 4 a935 2 Rule Perry 1961 1963 - Oct lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] d939 1 a939 2 -5:00 - EST 1967 Oct 29 2:00 -6:00 US C%sT 1969 Apr 27 2:00 d951 1 a951 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d973 1 a973 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d989 1 a989 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d1000 1 a1000 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] a1014 9 # From Michael Deckers (2019-08-06): # From the contemporary source given by Alois Treindl, # the switch in Louisville on 1946-04-28 was on 00:01 # From Paul Eggert (2019-08-26): # That source was the Louisville Courier-Journal, 1946-04-27, p 4. # Shanks gives 02:00 for all 20th-century transition times in Louisville. # Evidently this is wrong for spring 1946. Although also likely wrong # for other dates, we have no data. # d1020 1 a1020 1 Rule Louisville 1941 only - Apr lastSun 2:00 1:00 D a1021 1 Rule Louisville 1946 only - Apr lastSun 0:01 1:00 D a1022 1 Rule Louisville 1950 1961 - Apr lastSun 2:00 1:00 D d1024 2 a1025 2 Rule Louisville 1956 1961 - Oct lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] d1114 12 a1125 13 # From Paul Eggert (2019-07-06): # Due to a complicated set of legal maneuvers, in 1967 Michigan did # not start daylight saving time when the rest of the US did. # Instead, it began DST on Jun 14 at 00:01. This was big news: # the Detroit Free Press reported it at the top of Page 1 on # 1967-06-14, in an article "State Adjusting to Switch to Fast Time" # by Gary Blonston, above an article about Thurgood Marshall's # confirmation to the US Supreme Court. Although Shanks says Detroit # observed DST until 1967-10-29 00:01, that time of day seems to be # incorrect, as the Free Press later said DST ended in Michigan at the # same time as the rest of the US. Also, although Shanks reports no DST in # Detroit in 1968, it did observe DST that year; in the November 1968 # election Michigan voters narrowly repealed DST, effective 1969. d1131 1 a1131 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d1136 1 a1136 3 -5:00 Detroit E%sT 1967 Jun 14 0:01 -5:00 US E%sT 1969 -5:00 - EST 1973 d1148 1 a1148 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] a1184 6 # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 # . # # Pearce C. The Great Daylight Saving Time Controversy. # Australian Ebook Publisher. 2017. ISBN 978-1-925516-96-8. # d1193 3 d1382 1 a1382 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d1395 1 a1395 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d1469 1 a1469 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d1507 1 a1507 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d1536 1 a1536 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d1704 13 a1716 4 Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S d1749 1 a1749 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d1824 1 a1824 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] a1845 6 # From Paul Eggert (2019-07-25): # Pearce's book says Regina observed DST in 1914-1917. No dates and times, # unfortunately. It also says that in 1914 Saskatoon observed DST # from 1 June to 6 July, and that DST was also tried out in Davidson, # Melfort, and Prince Albert. d1908 1 a1908 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] a1920 13 # From Alois Triendl (2019-07-19): # There was no DST in Alberta in 1967... Calgary Herald, 29 April 1967. # 1969, no DST, from Edmonton Journal 18 April 1969 # # From Paul Eggert (2019-07-25): # Pearce's book says that Alberta's 1948 Daylight Saving Act required # Mountain Standard Time without DST, and that "anyone who broke that law # could be fined up to $25 and costs". There seems to be no record of # anybody paying the fine. The law was not changed until an August 1971 # plebiscite reinstituted DST in 1972. This story is also mentioned in: # Boyer JP. Forcing Choice: The Risky Reward of Referendums. Dundum. 2017. # ISBN 978-1459739123. d1933 4 d1939 1 a1939 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2019 1 a2019 1 # From Paul Eggert (2019-07-25): a2020 12 # Alois Triendl confirmed this on 07-22, citing the 1946-04-27 Vancouver Daily # Province. He also cited the 1946-09-28 Victoria Daily Times, which said # that Vancouver, Victoria, etc. "change at midnight Saturday"; for now, # guess they meant 02:00 Sunday since 02:00 was common practice in Vancouver. # # Early Vancouver, Volume Four, by Major J.S. Matthews, V.D., 2011 edition # says that a 1922 plebiscite adopted DST, but a 1923 plebiscite rejected it. # http://former.vancouver.ca/ctyclerk/archives/digitized/EarlyVan/SearchEarlyVan/Vol4pdf/MatthewsEarlyVancouverVol4_DaylightSavings.pdf # A catalog entry for a newspaper clipping seems to indicate that Vancouver # observed DST in 1941 from 07-07 through 09-27; see # https://searcharchives.vancouver.ca/daylight-saving-1918-starts-again-july-7-1941-start-d-s-sept-27-end-of-d-s-1941 # We have no further details, so omit them for now. d2029 1 a2029 1 Rule Vanc 1946 only - Sep 29 2:00 0 S d2032 1 a2032 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2103 1 a2103 1 # [no online source found] d2136 1 a2136 1 # [no online source found] d2352 1 a2352 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2499 1 a2499 1 # https://www.latimes.com/archives/la-xpm-2001-mar-03-mn-32561-story.html d2626 1 a2626 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2819 1 a2819 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2834 1 a2834 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2848 1 a2848 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2865 1 a2865 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2887 1 a2887 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3093 1 a3093 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3128 1 a3128 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3143 1 a3143 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3176 1 a3176 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3262 1 a3262 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3301 1 a3301 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3322 1 a3322 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3330 1 a3330 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3394 1 a3394 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3406 1 a3406 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3414 1 a3414 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3426 1 a3426 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d3472 1 a3472 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] @ 1.1.1.25 log @Import tzdata2020a from ftp://ftp.iana.org/tz/releases/tzdata2020a.tar.gz Summary of changes in tzdata2020a (2020-04-23 16:03:47 -0700): Morocco resumes summer time on 2020-05-31, not 2020-05-24. Canada's Yukon advanced to -07 year-round on 2020-03-08 (summer time will not end this year).. America/Nuuk renamed from America/Godthab (both names now exist). @ text @d89 1 a89 1 # https://web.archive.org/web/20160517155308/http://www.clpgh.org/exhibit/dst.html d1473 1 a1473 2 # west Labrador, Nova Scotia, Prince Edward I, # Îles-de-la-Madeleine, Listuguj reserve a1491 7 # From Jeffery Nichols (2020-01-09): # America/Halifax ... also applies to Îles-de-la-Madeleine and the Listuguj # reserve in Quebec. Officially, this came into effect on January 1, 2007 # (Legal Time Act, CQLR c T-5.1), but the legislative debates surrounding that # bill say that it is "accommodating the customs and practices" of those # regions, which suggests that they have always been in-line with Halifax. d1585 1 a1585 1 # From Paul Eggert (2020-01-10): a1586 1 # See America/Halifax for the Îles de la Madeleine and the Listuguj reserve. d1593 1 a1593 1 # https://www.justice.gouv.qc.ca/en/department/ministre/functions-and-responsabilities/legal-time-in-quebec/the-situation-in-minganie-and-basse-cote-nord/ d1596 2 a1597 2 # This common practice was codified into law as of 2007; see Legal Time Act, # CQLR c T-5.1 . a1615 9 # From Jeffery Nichols (2020-02-06): # According to the [Shanks] atlas, those western Ontario zones are huge, # covering most of Ontario northwest of Sault Ste Marie and Timmins. # The zones seem to include towns bigger than the ones they're named after, # like Dryden in America/Rainy_River and Wawa (and maybe Attawapiskat) in # America/Nipigon. I assume it's too much trouble to change the name of the # zone (like when you found out that America/Glace_Bay includes Sydney, Nova # Scotia).... a2421 12 # From Tim Parenti (2020-03-05): # The government of Yukon announced [yesterday] the cessation of seasonal time # changes. "After clocks are pushed ahead one hour on March 8, the territory # will remain on [UTC-07]. ... [The government] found 93 per cent of # respondents wanted to end seasonal time changes and, of that group, 70 per # cent wanted 'permanent Pacific Daylight Saving Time.'" # https://www.cbc.ca/news/canada/north/yukon-end-daylight-saving-time-1.5486358 # # Although the government press release prefers PDT, we prefer MST for # consistency with nearby Dawson Creek, Creston, and Fort Nelson. # https://yukon.ca/en/news/yukon-end-seasonal-time-change d2476 1 a2476 2 -8:00 Canada P%sT 2020 Mar 8 2:00 -7:00 - MST d2480 1 a2480 2 -8:00 Canada P%sT 2020 Mar 8 2:00 -7:00 - MST @ 1.1.1.26 log @Import tzdata2020b from ftp://ftp.iana.org/tz/releases/tzdata2020b.tar.gz Summary of changes in tzdata2020b (2020-10-06 18:35:04 -0700): Revised predictions for Morocco's changes starting in 2023. Canada's Yukon changes to -07 on 2020-11-01, not 2020-03-08. Macquarie Island has stayed in sync with Tasmania since 2011. Casey, Antarctica is at +08 in winter and +11 in summer. @ text @d173 1 a173 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d350 1 a350 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d434 1 a434 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d503 1 a503 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d556 1 a556 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d914 1 a914 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d933 1 a933 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d952 1 a952 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d977 1 a977 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d994 1 a994 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d1015 1 a1015 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d1032 1 a1032 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d1074 1 a1074 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d1188 1 a1188 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d1205 1 a1205 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER d1375 1 a1375 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d1398 1 a1398 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d1500 1 a1500 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d1566 1 a1566 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d1775 1 a1775 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d1873 1 a1873 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d1964 1 a1964 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d2014 1 a2014 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d2123 1 a2123 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d2452 1 a2452 13 # From Andrew G. Smith (2020-09-24): # Yukon has completed its regulatory change to be on UTC -7 year-round.... # http://www.gov.yk.ca/legislation/regs/oic2020_125.pdf # What we have done is re-defined Yukon Standard Time, as we are # authorized to do under section 33 of our Interpretation Act: # http://www.gov.yk.ca/legislation/acts/interpretation_c.pdf # # From Paul Eggert (2020-09-24): # tzdb uses the obsolete YST abbreviation for standard time in Yukon through # about 1970, and uses PST for standard time in Yukon since then. Consistent # with that, use MST for -07, the new standard time in Yukon effective Nov. 1. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d2506 1 a2506 1 -8:00 Canada P%sT 2020 Nov 1 d2511 1 a2511 1 -8:00 Canada P%sT 2020 Nov 1 d2726 1 a2726 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d2931 1 a2931 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d2943 1 a2943 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d2956 1 a2956 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d2993 1 a2993 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d3167 1 a3167 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d3236 1 a3236 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d3253 1 a3253 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d3282 1 a3282 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d3363 1 a3363 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d3411 1 a3411 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S d3502 1 a3502 1 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S @ 1.1.1.27 log @Import tzdata2020f from ftp://ftp.iana.org/tz/releases/tzdata2020f.tar.gz Release 2020f - 2020-12-29 00:17:46 -0800 No changes to tzdata, just to a part of the build procedure not used on NetBSD Release 2020e - 2020-12-22 15:14:34 -0800 Volgograd switched to Moscow time on 2020-12-27 at 02:00. Correct many pre-1986 transitions, fixing entries originally derived from Shanks. The fixes include changes to: Australia, Bahamas, Bermuda, Belize, Ghana, Israel and Palestine, Kenya and adjacent, Nigeria and adjacent, Seychelles, Vanuatu Australia/Currie has been moved to the 'backward' file and its corrected data moved to the 'backzone' file. To better match legislation in Turks and Caicos, the 2015 shift to year-round observance of -04 is now modeled as AST throughout before returning to Eastern Time with US DST in 2018, rather than as maintaining EDT until 2015-11-01. @ text @d2237 1 a2237 1 # https://mm.icann.org/pipermail/tz/attachments/20201125/d5adc93b/CAYTOIC1980-02DST1980-01-04-0001.pdf a2937 21 # From P Chan (2020-11-27, corrected on 2020-12-02): # There were two periods of DST observed in 1942-1945: 1942-05-01 # midnight to 1944-12-31 midnight and 1945-02-01 to 1945-10-17 midnight. # "midnight" should mean 24:00 from the context. # # War Time Order 1942 [1942-05-01] and War Time (No. 2) Order 1942 [1942-09-29] # Appendix to the Statutes of 7 George VI. and the Year 1942. p 34, 43 # https://books.google.com/books?id=5rlNAQAAIAAJ&pg=RA3-PA34 # https://books.google.com/books?id=5rlNAQAAIAAJ&pg=RA3-PA43 # # War Time Order 1943 [1943-03-31] and War Time Order 1944 [1943-12-29] # Appendix to the Statutes of 8 George VI. and the Year 1943. p 9-10, 28-29 # https://books.google.com/books?id=5rlNAQAAIAAJ&pg=RA4-PA9 # https://books.google.com/books?id=5rlNAQAAIAAJ&pg=RA4-PA28 # # War Time Order 1945 [1945-01-31] and the Order which revoke War Time Order # 1945 [1945-10-16] Appendix to the Statutes of 9 George VI. and the Year # 1945. p 160, 247-248 # https://books.google.com/books?id=5rlNAQAAIAAJ&pg=RA6-PA160 # https://books.google.com/books?id=5rlNAQAAIAAJ&pg=RA6-PA247 # a2943 5 Rule Bahamas 1942 only - May 1 24:00 1:00 W Rule Bahamas 1944 only - Dec 31 24:00 0 S Rule Bahamas 1945 only - Feb 1 0:00 1:00 W Rule Bahamas 1945 only - Aug 14 23:00u 1:00 P # Peace Rule Bahamas 1945 only - Oct 17 24:00 0 S d2967 1 a2967 36 # From P Chan (2020-11-03): # Below are some laws related to the time in British Honduras/Belize: # # Definition of Time Ordinance, 1927 (No.4 of 1927) [1927-04-01] # Ordinances of British Honduras Passed in the Year 1927, p 19-20 # https://books.google.com/books?id=LqEpAQAAMAAJ&pg=RA3-PA19 # # Definition of Time (Amendment) Ordinance, 1942 (No. 5 of 1942) [1942-06-27] # Ordinances of British Honduras Passed in the Year 1942, p 31-32 # https://books.google.com/books?id=h6MpAQAAMAAJ&pg=RA6-PA95-IA44 # # Definition of Time Ordinance, 1945 (No. 19 of 1945) [1945-12-15] # Ordinances of British Honduras Passed in the Year 1945, p 49-50 # https://books.google.com/books?id=xaMpAQAAMAAJ&pg=RA2-PP1 # # Definition of Time Ordinance, 1947 (No. 1 of 1947) [1947-03-11] # Ordinances of British Honduras Passed in the Year 1947, p 1-2 # https://books.google.com/books?id=xaMpAQAAMAAJ&pg=RA3-PA1 # # Time (Definition of) Ordinance (Chapter 180) # The Laws of British Honduras in Force on the 15th Day of September, 1958 , Volume IV, p 2580 # https://books.google.com/books?id=v5QpAQAAMAAJ&pg=PA2580 # # Time (Definition of) (Amendment) Ordinance, 1968 (No. 13 of 1968) [1968-08-03] # https://books.google.com/books?id=xij7KEB_58wC&pg=RA1-PA428-IA9 # # Definition of Time Act (Chapter 339) # Law of Belize, Revised Edition 2000 # http://www.belizelaw.org/web/lawadmin/PDF%20files/cap339.pdf # From Paul Eggert (2020-11-03): # The transitions below are derived from P Chan's sources, except that the # 1973 through 1983 transitions are from Shanks & Pottenger since we have # no better data there. d2969 2 a2970 7 Rule Belize 1918 1941 - Oct Sat>=1 24:00 0:30 -0530 Rule Belize 1919 1942 - Feb Sat>=8 24:00 0 CST Rule Belize 1942 only - Jun 27 24:00 1:00 CWT Rule Belize 1945 only - Aug 14 23:00u 1:00 CPT Rule Belize 1945 only - Dec 15 24:00 0 CST Rule Belize 1947 1967 - Oct Sat>=1 24:00 0:30 -0530 Rule Belize 1948 1968 - Feb Sat>=8 24:00 0 CST d2976 1 a2976 1 Zone America/Belize -5:52:48 - LMT 1912 Apr 1 a2980 1 # From Paul Eggert (2020-11-24): d2982 1 a2982 69 # Bermuda dockyard, Ireland I. This agrees with standard offset given in the # Daylight Saving Act, 1917 cited below. Round that to the nearest second. # It is not known when this time became standard for Bermuda; guess 1890. # The transition to -04 was specified by: # 1930: The Time Zone Act, 1929 (1929: No. 39) [1929-11-08] # https://books.google.com/books?id=7tdMAQAAIAAJ&pg=RA54-PP1 # From P Chan (2020-11-20): # Most of the information can be found online from the Bermuda National # Library - Digital Collection which includes The Royal Gazette (RG) until 1957 # https://bnl.contentdm.oclc.org/digital/ # I will cite the ID. For example, [10000] means # https://bnl.contentdm.oclc.org/digital/collection/BermudaNP02/id/10000 # # 1917: Apr 5 midnight to Sep 30 midnight # Daylight Saving Act, 1917 (1917 No. 13) [1917-04-02] # Bermuda Acts and Resolves 1917, p 37-38 # https://books.google.com/books?id=M-lCAQAAMAAJ&pg=PA36-IA2 # RG, 1917-04-04, p 6 [42340] gives the spring forward date. # # 1918: Apr 13 midnight to Sep 15 midnight # Daylight Saving Act, 1918 (1918 No. 9) [1918-04-06] # Bermuda Acts and Resolves 1917, p 13 # https://books.google.com/books?id=K-lCAQAAMAAJ&pg=RA1-PA7 # # Note that local mean time was still used before 1930. # # During WWII, DST was introduced by Defence Regulations # 1942: Jan 11 02:00 to Oct 18 02:00 [113646], [115726] # 1943: Mar 21 02:00 to Oct 31 02:00 [116704], [118193] # 1944: Mar 12 02:00 to Nov 5 02:00 [119225], [121593] # 1945: Mar 11 02:00 to Nov 4 02:00 [122369], [124461] # RG, 1942-01-08, p 2, 1942-10-12, p 2 , 1943-03-06, p 2, 1943-09-03, p 1, # 1944-02-29, p 6, 1944-09-20, p 2, 1945-02-13, p 2, 1945-11-03, p 1 # # In 1946, the House of Assembly rejected DST twice. [128686], [128076] # RG, 1946-03-16 p 1,1946-04-13 p 1 # # 1947: third Sunday in May 02:00 to second Sunday in September 02:00 # DST in 1947 was defined in the Daylight Saving Act, 1947 (1947: No. 12) # which expired at the end of the year. [125784] ,[132405], [144454], [138226] # RG, 1947-02-27, p 1, 1947-05-15, p 1, 1947-09-13, p 1, 1947-12-30, p 1 # # 1948-1952: fourth Sunday in May 02:00 to first Sunday in September 02:00 # DST in 1948 was defined in the Daylight Saving Act, 1948 (1948 : No. 12) # which was set to expired at the end of the year but it was extended until # the end of 1952 and was not further extended. # [129802], [139403], [146008], [135240], [144330], [139049], [143309], # [148271], [149773], [153589], [153802], [155924] # RG, 1948-04-13, p 1, 1948-05-22, p 1, 1948-09-04, p 1, 1949-05-21, p1, # 1949-09-03, p 1, 1950-05-27 p 1, 1950-09-02, p 1, 1951-05-27, p 1, # 1951-09-01, p 1, 1952-05-23, p 1, 1952-09-26, p 1, 1952-12-21, p 8 # # In 1953-1955, the House of Assembly rejected DST each year. [158996], # [162620], [166720] RG, 1953-05-02, p 1, 1954-04-01 p 1, 1955-03-12, p 1 # # 1956: fourth Sunday in May 02:00 to last Sunday in October 02:00 # Time Zone (Seasonal Variation) Act, 1956 (1956: No.44) [1956-05-25] # Bermuda Public Acts 1956, p 331-332 # https://books.google.com/books?id=Xs1AlmD_cEwC&pg=PA63 # # The extension of the Act was rejected by the House of Assembly. [176218] # RG, 1956-12-13, p 1 # # From the Chronological Table of Public and Private Acts up to 1985, it seems # that there does not exist other Acts related to DST before 1973. # https://books.google.com/books?id=r9hMAQAAIAAJ&pg=RA23-PA1 # Public Acts of the Legislature of the Islands of Bermuda, Together with # Statutory Instruments in Force Thereunder, Vol VII d2985 1 a2991 18 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Bermuda 1917 only - Apr 5 24:00 1:00 - Rule Bermuda 1917 only - Sep 30 24:00 0 - Rule Bermuda 1918 only - Apr 13 24:00 1:00 - Rule Bermuda 1918 only - Sep 15 24:00 0 S Rule Bermuda 1942 only - Jan 11 2:00 1:00 D Rule Bermuda 1942 only - Oct 18 2:00 0 S Rule Bermuda 1943 only - Mar 21 2:00 1:00 D Rule Bermuda 1943 only - Oct 31 2:00 0 S Rule Bermuda 1944 1945 - Mar Sun>=8 2:00 1:00 D Rule Bermuda 1944 1945 - Nov Sun>=1 2:00 0 S Rule Bermuda 1947 only - May Sun>=15 2:00 1:00 D Rule Bermuda 1947 only - Sep Sun>=8 2:00 0 S Rule Bermuda 1948 1952 - May Sun>=22 2:00 1:00 D Rule Bermuda 1948 1952 - Sep Sun>=1 2:00 0 S Rule Bermuda 1956 only - May Sun>=22 2:00 1:00 D Rule Bermuda 1956 only - Oct lastSun 2:00 0 S d2993 2 a2994 3 Zone Atlantic/Bermuda -4:19:18 - LMT 1890 # Hamilton -4:19:18 Bermuda BMT/BST 1930 Jan 1 2:00 -4:00 Bermuda A%sT 1974 Apr 28 2:00 d3577 1 a3577 1 d3592 1 a3598 24 # From P Chan (2020-11-27): # Standard Time Declaration Order 2015 (L.N. 15/2015) # http://online.fliphtml5.com/fizd/czin/#p=2 # # Standard Time Declaration Order 2017 (L.N. 31/2017) # http://online.fliphtml5.com/fizd/dmcu/#p=2 # # From Tim Parenti (2020-12-05): # Although L.N. 31/2017 reads that it "shall come into operation at 2:00 a.m. # on 11th March 2018", a precise interpretation here poses some problems. The # order states that "the standard time to be observed throughout the Turks and # Caicos Islands shall be the same time zone as the Eastern United States of # America" and further clarifies "[f]or the avoidance of doubt" that it # "applies to the Eastern Standard Time as well as any changes thereto for # Daylight Saving Time." However, as clocks in Turks and Caicos approached # 02:00 -04, and thus the declared implementation time, it was still 01:00 EST # (-05), as DST in the Eastern US would not start until an hour later. # # Since it is unlikely that those on the islands switched their clocks twice in # the span of an hour, we assume instead that the adoption of EDT actually took # effect once clocks in the Eastern US had sprung forward, from 03:00 -04. # This discrepancy only affects the time zone abbreviation and DST flag for the # intervening hour, not wall clock times, as -04 was maintained throughout. d3603 2 a3604 2 -5:00 US E%sT 2015 Mar 8 2:00 -4:00 - AST 2018 Mar 11 3:00 @ 1.1.1.28 log @Import tzdata2022agtz not from ftp://ftp.iana.org/tz/releases/tzdata2022agtz.tar.gz (2022a comes from ftp://ftp.iana.org/tz/releases/tzdata2022a.tar.gz) Note that 2022agtz is mechanically derived from 2022a by moving back zone data from the "backzone" file that had been removed as "redundant" (because differences to some other zone are all prior to 1970) so that this pre 1970 data is restored. It isn't necessarily correct in all cases, but it is usually better than using some other zone's data which is just as likely to be incorrect for where it applies, and more so elsewhere. Summary of changes in tzdata2022a (2022-03-15 23:02:01 -0700): * Palestine will spring forward on 2022-03-27, not 2022-03-26. * From 1992 through spring 1996, Ukraine's DST transitions were at 02:00 standard time, not at 01:00 UTC. * Chile's Santiago Mean Time and its LMT precursor have been adjusted eastward by 1 second to align with past and present law. * Changes to commentary. @ text @d732 1 a732 5 # The following switches don't make our 1970 cutoff. # # Kiska observed Tokyo date and time during Japanese occupation from # 1942-06-06 to 1943-07-29, and similarly for Attu from 1942-06-07 to # 1943-05-29 (all dates American). Both islands are now uninhabited. a827 1 d973 1 a973 1 # From Alois Treindl (2019-07-09): d1594 1 d1596 14 d1652 48 a1844 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] d2001 1 a2001 1 # From Alois Treindl (2019-07-19): d2040 54 d2110 1 a2110 1 # Alois Treindl confirmed this on 07-22, citing the 1946-04-27 Vancouver Daily a2146 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] a2930 4 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Anguilla -4:12:16 - LMT 1912 Mar 2 -4:00 - AST d2932 1 a2932 4 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Antigua -4:07:12 - LMT 1912 Mar 2 -5:00 - EST 1951 -4:00 - AST d2934 29 a2963 1 # The Bahamas a2971 1 d2981 1 a2981 36 # From P Chan (2020-12-09 and 2020-12-11): # Standard time of GMT-4 was adopted in 1911. # Definition of Time Act, 1911 (1911-7) [1911-08-28] # 1912, Laws of Barbados (5 v.), OCLC Number: 919801291, Vol. 4, Image No. 522 # 1944, Laws of Barbados (5 v.), OCLC Number: 84548697, Vol. 4, Image No. 122 # http://llmc.com/browse.aspx?type=2&coll=85&div=297 # # DST was observed in 1942-44. # Defence (Daylight Saving) Regulations, 1942, 1942-04-13 # Defence (Daylight Saving) (Repeal) Regulations, 1942, 1942-08-22 # Defence (Daylight Saving) Regulations, 1943, 1943-04-16 # Defence (Daylight Saving) (Repeal) Regulations, 1943, 1943-09-01 # Defence (Daylight Saving) Regulations, 1944, 1944-03-21 # [Defence (Daylight Saving) (Amendment) Regulations 1944, 1944-03-28] # Defence (Daylight Saving) (Repeal) Regulations, 1944, 1944-08-30 # # 1914-, Subsidiary Legis., Annual Vols. OCLC Number: 226290591 # 1942: Image Nos. 527-528, 555-556 # 1943: Image Nos. 178-179, 198 # 1944: Image Nos. 113-115, 129 # http://llmc.com/titledescfull.aspx?type=2&coll=85&div=297&set=98437 # # From Tim Parenti (2021-02-20): # The transitions below are derived from P Chan's sources, except that the 1977 # through 1980 transitions are from Shanks & Pottenger since we have no better # data there. Of particular note, the 1944 DST regulation only advanced the # time to "exactly three and a half hours later than Greenwich mean time", as # opposed to "three hours" in the 1942 and 1943 regulations. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Barb 1942 only - Apr 19 5:00u 1:00 D Rule Barb 1942 only - Aug 31 6:00u 0 S Rule Barb 1943 only - May 2 5:00u 1:00 D Rule Barb 1943 only - Sep 5 6:00u 0 S Rule Barb 1944 only - Apr 10 5:00u 0:30 - Rule Barb 1944 only - Sep 10 6:00u 0 S d2988 2 a2989 3 Zone America/Barbados -3:58:29 - LMT 1911 Aug 28 # Bridgetown -4:00 Barb A%sT 1944 -4:00 Barb AST/-0330 1945 a3150 3 # Caribbean Netherlands # See America/Kralendijk in southamerica. d3152 1 a3152 4 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown -5:07:10 - KMT 1912 Feb # Kingston Mean Time -5:00 - EST d3379 1 a3379 4 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau -4:00 - AST a3427 4 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Grenada -4:07:00 - LMT 1911 Jul # St George's -4:00 - AST a3428 4 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe-à-Pitre -4:00 - AST a3429 1 # See America/St_Barthelemy in southamerica. d3431 1 a3431 1 # See America/Marigot in southamerica. d3618 1 a3618 4 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Cork Hill -4:00 - AST d3690 1 a3700 4 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre -4:00 - AST d3702 1 a3702 5 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/St_Lucia -4:04:00 - LMT 1890 # Castries -4:04:00 - CMT 1912 # Castries Mean Time -4:00 - AST d3713 1 a3713 8 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown -4:04:56 - KMT 1912 # Kingstown Mean Time -4:00 - AST # Sint Maarten # See America/Lower_Princes in southamerica. d3784 2 a3785 9 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town -4:00 - AST # US Virgin Is # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie -4:00 - AST @ 1.1.1.29 log @Import tzdata2022c from https://github.com/JodaOrg/global-tz/releases/download//2022bgtz/tzdata2022bgtz.tar.gz Summary of changes in tzdata2022c (2022-08-15 17:47:18 -0700): * None. Summary of changes in tzdata2022b (2022-08-10 15:38:32 -0700): * Chile's 2022 DST start is delayed from September 4 to September 11. * Iran plans to stop observing DST permanently, after it falls back on 2022-09-21. * From fall 1994 through fall 1995, Shanks wrote that Crimea's DST transitions were at 02:00 standard time, not at 00:00. * Iran adopted standard time in 1935, not 1946. * Chile's observance of -04 from 1946-08-29 through 1947-03-31 was considered DST, not standard time. * Some old, small clock transitions have been removed, as people at the time did not change their clocks. @ text @d347 2 a348 1 # Eastern time (i.e., -4:56:01.6) just before the 1883 switch. d357 1 a357 2 #STDOFF -4:56:01.6 Zone America/New_York -4:56:02 - LMT 1883 Nov 18 17:00u a1792 1 #PACKRATLIST zone.tab Link America/Atikokan America/Coral_Harbour d2849 1 a2849 1 # For 1899 Milne gives -3:58:29.2. a2892 1 #STDOFF -3:58:29.2 d2953 1 a2953 1 # From Paul Eggert (2022-07-27): d2956 1 a2956 1 # Daylight Saving Act, 1917 cited below. a3050 1 #STDOFF -4:19:18.3 d3068 1 a3068 1 # Milne gives -5:36:13.3 as San José mean time. a3079 1 #STDOFF -5:36:13.3 d3514 1 a3514 1 # island". Go with Milne. a3526 1 #STDOFF -5:07:10.41 a3717 1 #STDOFF -5:07:10.41 @ 1.1.1.30 log @Import tzdata2022e from https://github.com/JodaOrg/global-tz/releases/download/2022egtz/tzdata2022egtz.tar.gz Summary of changes in tzdata2022e (2022-10-11 11:13:02 -0700): * Jordan and Syria are abandoning the DST regime and are changing to permanent +03, so they will not fall back from +03 to +02 on 2022-10-28. * On 1922-01-01 Tijuana adopted standard time at 00:00, not 01:00. @ text @d442 1 a442 1 Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 18:00u d451 1 a451 1 Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 19:00u d461 1 a461 1 Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 19:00u d478 1 a478 1 Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 19:00u d510 1 a510 1 Zone America/Denver -6:59:56 - LMT 1883 Nov 18 19:00u d563 1 a563 1 Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 20:00u d825 1 a825 1 Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 19:00u d852 1 a852 1 Zone America/Boise -7:44:49 - LMT 1883 Nov 18 20:00u d924 1 a924 1 Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 18:00u d944 1 a944 1 Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 18:00u d968 1 a968 1 Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 18:00u d988 1 a988 1 Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 18:00u d1005 1 a1005 1 Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 18:00u d1027 1 a1027 1 Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 18:00u d1043 1 a1043 1 Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 18:00u d1054 1 a1054 1 Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 18:00u d1090 1 a1090 1 Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 18:00u d1124 1 a1124 1 Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 18:00u a2629 2 Rule Mexico 1931 only - May 1 23:00 1:00 D Rule Mexico 1931 only - Oct 1 0:00 0 S d2646 1 a2646 1 Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 6:00u d2652 1 a2652 1 Zone America/Merida -5:58:28 - LMT 1922 Jan 1 6:00u d2666 1 a2666 1 Zone America/Matamoros -6:30:00 - LMT 1922 Jan 1 6:00u d2672 1 a2672 1 Zone America/Monterrey -6:41:16 - LMT 1922 Jan 1 6:00u d2677 1 a2677 1 Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 7:00u d2680 3 a2682 1 -7:00 Mexico M%sT 1932 Apr 1 d2690 1 a2690 1 Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 7:00u d2693 3 a2695 1 -7:00 Mexico M%sT 1932 Apr 1 d2702 1 a2702 1 Zone America/Chihuahua -7:04:20 - LMT 1922 Jan 1 7:00u d2705 3 a2707 1 -7:00 Mexico M%sT 1932 Apr 1 d2713 1 a2713 1 Zone America/Hermosillo -7:23:52 - LMT 1922 Jan 1 7:00u d2716 3 a2718 1 -7:00 Mexico M%sT 1932 Apr 1 d2753 1 a2753 1 Zone America/Mazatlan -7:05:40 - LMT 1922 Jan 1 7:00u d2756 3 a2758 1 -7:00 Mexico M%sT 1932 Apr 1 d2765 1 a2765 1 Zone America/Bahia_Banderas -7:01:00 - LMT 1922 Jan 1 7:00u d2768 3 a2770 1 -7:00 Mexico M%sT 1932 Apr 1 d2778 1 a2778 1 Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 7:00u @ 1.1.1.31 log @Import tzdata2022f from https://github.com/JodaOrg/global-tz/releases/download/2022fgtz/tzdata2022fgtz.tar.gz Summary of changes in tzdata2022f (2022-10-28 18:04:57 -0700): * Mexico will no longer observe DST after 2022, except for areas near the US border that continue to observe US DST rules. * Fiji will not observe DST in 2022/3. * Simplify four Ontario zones, as most of the post-1970 differences seem to have been imaginary. @ text @a1598 1 # See America/Toronto for most of Quebec, including Montreal. a1599 1 # See America/Puerto_Rico for east of Natashquan. d1607 17 d1644 11 d1662 4 a1665 2 # ... I don't know if Windsor began observing DST when Detroit did, # or in 1974, or on some other date. d1747 17 d1772 15 a2628 6 # From Paul Eggert (2022-10-28): # The new Mexican law was published today: # https://www.dof.gob.mx/nota_detalle.php?codigo=5670045&fecha=28/10/2022 # This abolishes DST except where US DST rules are observed, # and in addition changes all of Chihuahua to -06 with no DST. d2644 2 a2645 2 Rule Mexico 2002 2022 - Apr Sun>=1 2:00 1:00 D Rule Mexico 2002 2022 - Oct lastSun 2:00 0 S d2698 1 a2698 2 -7:00 US M%sT 2022 Oct 30 2:00 -6:00 - CST d2707 1 a2707 2 -7:00 Mexico M%sT 2022 Oct 30 2:00 -6:00 - CST a2804 4 # From Paul Eggert (2022-10-28): # Today's new law states that the entire state of Baja California # follows US DST rules, which agrees with simplifications noted above. # d2816 1 a2816 1 # Antigua & Barbuda d2822 1 d3289 1 a3347 1 d3541 1 d3632 1 d3641 1 a3641 1 # St Vincent & the Grenadines d3647 1 d3730 2 @ 1.1.1.32 log @Import tzdata2022g from https://github.com/JodaOrg/global-tz/releases/download/2022ggtz/tzdata2022ggtz.tar.gz Summary of changes in tzdata2022g (2022-11-29 08:58:31 -0800): * In the Mexican state of Chihuahua, the border strip near the US will change to agree with nearby US locations on 2022-11-30. * Much of Greenland, represented by America/Nuuk, stops observing winter time after March 2023, so its daylight saving time becomes standard time. * Changes for pre-1996 northern Canada (thanks to Chris Walton): * Merge America/Iqaluit and America/Pangnirtung into the former, with a backward compatibility link for the latter name. * Cambridge Bay, Inuvik, Iqaluit, Rankin Inlet, Resolute and Yellowknife did not observe DST in 1965, and did observe DST from 1972 through 1979. * Whitehorse moved from -09 to -08 on 1966-02-27, not 1967-05-28. * Colombia's 1993 fallback was 02-06 24:00, not 04-04 00:00. * Singapore's 1981-12-31 change was at 16:00 UTC (23:30 local time), not 24:00 local time. Zones added by this update: America/Ciudad_Juarez @ text @a1984 31 # From Chris Walton (2022-11-06): # Whitehorse Star - Thursday April 22, 1965 - page 1 # title: DST Starts Monday ... # https://www.newspapers.com/image/578587481/ # The title of this first article is wrong and/or misleading. # Also, the start time shown in the article is vague; it simply says "after # midnight" when it probably should have stated 2:00a.m.... # # Whitehorse Star - Monday October 25, 1965 - page 15 ... # https://www.newspapers.com/image/578589147/ # The 1965 Yukon Council minutes can be found here: # http://assets.yukonarchives.ca/PER_YG_06_1965_C20_S02_v1.pdf # ... I do not currently believe that NWT touched any of its clocks in 1965.... # # Whitehorse Star - Thursday Feb 24,1966 - page 2 # title: It's Time for YDT ... # https://www.newspapers.com/image/578575979/ ... # America/Whitehorse as a permanent change from UTC-9(YST) to # UTC-8(PST) at 00:00 on Sunday February 27, 1966.... # # Whitehorse Star - Friday April 28,1972 - page 6 # title: Daylight Saving Time for N.W.T.... # https://www.newspapers.com/image/578701610/ ... # Nunavut and NWT zones ... DST starting in 1972.... Start and End ... # should be the same as the rest of Canada # # # From Paul Eggert (2022-11-06): # For now, assume Yukon's 1965-04-22 spring forward was 00:00 -> 02:00, as this # seems likely than 02:00 -> 04:00 and matches "after midnight". a2098 7 # From Chris Walton (2022-11-06): # The 5th edition of the Atlas of Canada contains a time zone map that # shows both legislated and observed time zone boundaries. # All communities on Baffin Island are shown to be observing Eastern time. # The date on the map is 1984. # https://ftp.maps.canada.ca/pub/nrcan_rncan/raster/atlas_5_ed/eng/other/referencemaps/mcr4056.pdf d2111 34 a2144 1 # (1999) reports that ... Coral Harbour does not observe DST. d2303 4 a2306 2 Rule NT_YK 1972 1986 - Apr lastSun 2:00 1:00 D Rule NT_YK 1972 2006 - Oct lastSun 2:00 0 S a2307 2 Rule Yukon 1965 only - Apr lastSun 0:00 2:00 DD Rule Yukon 1965 only - Oct lastSun 2:00 0 S d2309 6 d2347 2 a2348 3 -9:00 NT_YK Y%sT 1965 -9:00 Yukon Y%sT 1966 Feb 27 0:00 -8:00 - PST 1980 d2352 2 a2353 3 -9:00 NT_YK Y%sT 1965 -9:00 Yukon Y%sT 1973 Oct 28 0:00 -8:00 - PST 1980 a2574 8 # From Heitor David Pinto (2022-11-28): # Now the northern municipalities want to have the same time zone as the # respective neighboring cities in the US, for example Juárez in UTC-7 with # DST, matching El Paso, and Ojinaga in UTC-6 with DST, matching Presidio.... # the president authorized the publication of the decree for November 29, # so the time change would occur on November 30 at 0:00. # http://puentelibre.mx/noticia/ciudad_juarez_cambio_horario_noviembre_2022/ d2606 3 a2608 3 # in Coahuila: Acuña, Allende, Guerrero, Hidalgo, Jiménez, Morelos, Nava, # Ocampo, Piedras Negras, Villa Unión, Zaragoza # in Nuevo León: Anáhuac d2611 3 a2613 1 # https://www.dof.gob.mx/nota_detalle.php?codigo=5670045&fecha=28/10/2022 d2632 1 a2632 1 # Chihuahua (near US border - western side) d2634 2 a2635 16 # and Práxedis G Guerrero. # http://gaceta.diputados.gob.mx/PDF/65/2a022/nov/20221124-VII.pdf Zone America/Ciudad_Juarez -7:05:56 - LMT 1922 Jan 1 7:00u -7:00 - MST 1927 Jun 10 23:00 -6:00 - CST 1930 Nov 15 -7:00 Mexico M%sT 1932 Apr 1 -6:00 - CST 1996 -6:00 Mexico C%sT 1998 -6:00 - CST 1998 Apr Sun>=1 3:00 -7:00 Mexico M%sT 2010 -7:00 US M%sT 2022 Oct 30 2:00 -6:00 - CST 2022 Nov 30 0:00 -7:00 US M%sT # Chihuahua (near US border - eastern side) # The municipalities of Coyame del Sotol, Ojinaga, and Manuel Benavides. # http://gaceta.diputados.gob.mx/PDF/65/2a022/nov/20221124-VII.pdf d2645 1 a2645 2 -6:00 - CST 2022 Nov 30 0:00 -6:00 US C%sT a2666 12 # Baja California Sur, Nayarit (except Bahía de Banderas), Sinaloa Zone America/Mazatlan -7:05:40 - LMT 1922 Jan 1 7:00u -7:00 - MST 1927 Jun 10 23:00 -6:00 - CST 1930 Nov 15 -7:00 Mexico M%sT 1932 Apr 1 -6:00 - CST 1942 Apr 24 -7:00 - MST 1949 Jan 14 -8:00 - PST 1970 -7:00 Mexico M%sT # Bahía de Banderas d2694 11 @ 1.1.1.32.2.1 log @Pull up the following, requested by kre in ticket #149: external/public-domain/tz/dist/CONTRIBUTING up to 1.1.1.8 external/public-domain/tz/dist/Makefile up to 1.1.1.36 external/public-domain/tz/dist/NEWS up to 1.1.1.43 external/public-domain/tz/dist/TZDATA_VERSION up to 1.35 external/public-domain/tz/dist/africa up to 1.1.1.31 external/public-domain/tz/dist/antarctica up to 1.1.1.17 external/public-domain/tz/dist/asia up to 1.10 external/public-domain/tz/dist/australasia up to 1.7 external/public-domain/tz/dist/backward up to 1.11 external/public-domain/tz/dist/backzone up to 1.1.1.26 external/public-domain/tz/dist/checktab.awk up to 1.1.1.12 external/public-domain/tz/dist/europe up to 1.1.1.37 external/public-domain/tz/dist/iso3166.tab up to 1.1.1.8 external/public-domain/tz/dist/leap-seconds.list up to 1.5 external/public-domain/tz/dist/leapseconds up to 1.5 external/public-domain/tz/dist/leapseconds.awk up to 1.1.1.13 external/public-domain/tz/dist/northamerica up to 1.1.1.33 external/public-domain/tz/dist/southamerica up to 1.1.1.23 external/public-domain/tz/dist/theory.html up to 1.1.1.18 external/public-domain/tz/dist/version up to 1.10 external/public-domain/tz/dist/zone.tab up to 1.1.1.25 external/public-domain/tz/dist/zone1970.tab up to 1.1.1.26 doc/3RDPARTY (apply patch) sync with HEAD: updated tzdata to 2023c @ text @d279 2 a280 2 # From Paul Eggert (2023-01-23), from a 2001-01-08 heads-up from Rives McDow: # Public law 106-564 (2000-12-23) introduced "Chamorro standard time" a281 1 # Also see 15 U.S.C. §263 . d598 1 a598 1 # One opinion of the early 1980s turmoil in Alaska over time zones and a669 4 # From Paul Eggert (2023-01-23): # America/Adak is for the Aleutian Islands that are part of Alaska # and are west of 169.5° W. d2141 4 d2338 3 d2577 1 a2577 1 # Now the northern [municipios] want to have the same time zone as the d2614 1 a2614 1 # This includes the following municipios: d2640 2 a2641 2 # This includes the municipios of Janos, Ascensión, Juárez, Guadalupe, and # Práxedis G Guerrero. d2655 1 a2655 2 # This includes the municipios of Coyame del Sotol, Ojinaga, and Manuel # Benavides. d3111 1 a3111 1 # http://www.prensalatina.com.mx/article.asp?ID={4CC32C1B-A9F7-42FB-8A07-8631AFC923AF}&language=ES @ 1.1.1.32.2.2 log @Pull up the following, requested by kre in ticket #520: external/public-domain/tz/dist/checknow.awk up to 1.1.1.1 external/public-domain/tz/dist/zonenow.tab up to 1.1.1.1 external/public-domain/tz/dist/Makefile up to 1.1.1.37 external/public-domain/tz/dist/NEWS up to 1.1.1.44 external/public-domain/tz/dist/README up to 1.1.1.11 external/public-domain/tz/dist/TZDATA_VERSION up to 1.36 external/public-domain/tz/dist/africa up to 1.1.1.32 external/public-domain/tz/dist/antarctica up to 1.1.1.18 external/public-domain/tz/dist/asia up to 1.11 external/public-domain/tz/dist/australasia up to 1.8 external/public-domain/tz/dist/backzone up to 1.1.1.27 external/public-domain/tz/dist/checktab.awk up to 1.1.1.13 external/public-domain/tz/dist/europe up to 1.1.1.38 external/public-domain/tz/dist/iso3166.tab up to 1.1.1.9 external/public-domain/tz/dist/leap-seconds.list up to 1.6 external/public-domain/tz/dist/leapseconds up to 1.6 external/public-domain/tz/dist/northamerica up to 1.1.1.34 external/public-domain/tz/dist/southamerica up to 1.1.1.24 external/public-domain/tz/dist/version up to 1.11 external/public-domain/tz/dist/zone.tab up to 1.1.1.26 external/public-domain/tz/dist/zone1970.tab up to 1.1.1.27 doc/3RDPARTY 1.1972 (patch) Import tzdata 2023d. @ text @d1456 1 a1456 1 # St John's has an apostrophe, but POSIX file names can't have apostrophes. @ 1.1.1.32.2.3 log @Pull up the following, requested by kre in ticket #586: external/public-domain/tz/dist/Makefile up to 1.1.1.38 external/public-domain/tz/dist/NEWS up to 1.1.1.45 external/public-domain/tz/dist/TZDATA_VERSION up to 1.37 external/public-domain/tz/dist/africa up to 1.1.1.33 external/public-domain/tz/dist/asia up to 1.12 external/public-domain/tz/dist/australasia up to 1.9 external/public-domain/tz/dist/checknow.awk up to 1.1.1.2 external/public-domain/tz/dist/etcetera up to 1.1.1.8 external/public-domain/tz/dist/europe up to 1.1.1.39 external/public-domain/tz/dist/leap-seconds.list up to 1.7 external/public-domain/tz/dist/leapseconds up to 1.7 external/public-domain/tz/dist/leapseconds.awk up to 1.1.1.14 external/public-domain/tz/dist/northamerica up to 1.1.1.35 external/public-domain/tz/dist/southamerica up to 1.1.1.25 external/public-domain/tz/dist/theory.html up to 1.1.1.19 external/public-domain/tz/dist/version up to 1.12 external/public-domain/tz/dist/zishrink.awk up to 1.1.1.9 external/public-domain/tz/dist/zonenow.tab up to 1.1.1.2 Updated tzdata to 2024a @ text @a1270 4 # For the 1911/1912 establishment of standard time in French possessions, see: # Société Française de Physique, Recueil de constantes physiques (1913), # page 752, 18b. # d1357 1 a1357 1 # https://web.archive.org/web/19990827055050/https://canadiangeographic.ca/SO98/geomap.htm a1648 9 # From Chris Walton (2024-01-09): # The [Toronto] changes in 1947, 1948, and 1949 took place at 2:00 a.m. local # time instead of midnight.... Toronto Daily Star - ... # April 2, 1947 - Page 39 ... April 7, 1948 - Page 13 ... # April 2, 1949 - Page 1 ... April 7, 1949 - Page 24 ... # November 25, 1949 - Page 52 ... April 21, 1950 - Page 14 ... # September 19, 1950 - Page 46 ... September 20, 1950 - Page 3 ... # November 24, 1950 - Page 21 d1710 7 a1716 3 Rule Toronto 1945 1948 - Sep lastSun 2:00 0 S Rule Toronto 1946 1973 - Apr lastSun 2:00 1:00 D Rule Toronto 1949 1950 - Nov lastSun 2:00 0 S d3504 1 a3504 1 -4:04:20 - FFMT 1911 May 1 # Fort-de-France MT d3607 1 a3607 1 Zone America/Miquelon -3:44:40 - LMT 1911 Jun 15 # St Pierre @ 1.1.1.32.2.4 log @Pullup the following revisions, requested by kre in ticket #1094: external/public-domain/tz/dist/zoneinfo2tdf.pl delete external/public-domain/tz/dist/CONTRIBUTING up to 1.1.1.9 external/public-domain/tz/dist/Makefile up to 1.3 external/public-domain/tz/dist/NEWS up to 1.3 external/public-domain/tz/dist/TZDATA_VERSION up to 1.41 external/public-domain/tz/dist/africa up to 1.2 external/public-domain/tz/dist/antarctica up to 1.3 external/public-domain/tz/dist/asia up to 1.14 external/public-domain/tz/dist/australasia up to 1.11 external/public-domain/tz/dist/backward up to 1.12 external/public-domain/tz/dist/backzone up to 1.2 external/public-domain/tz/dist/checknow.awk up to 1.3 external/public-domain/tz/dist/checktab.awk up to 1.3 external/public-domain/tz/dist/etcetera up to 1.3 external/public-domain/tz/dist/europe up to 1.3 external/public-domain/tz/dist/factory up to 1.3 external/public-domain/tz/dist/leap-seconds.list up to 1.9 external/public-domain/tz/dist/leapseconds up to 1.9 external/public-domain/tz/dist/northamerica up to 1.3 external/public-domain/tz/dist/southamerica up to 1.3 external/public-domain/tz/dist/theory.html up to 1.3 external/public-domain/tz/dist/version up to 1.14 external/public-domain/tz/dist/ziguard.awk up to 1.1.1.11 external/public-domain/tz/dist/zone.tab up to 1.3 external/public-domain/tz/dist/zone1970.tab up to 1.3 external/public-domain/tz/dist/zonenow.tab up to 1.3 distrib/sets/lists/base/mi (apply patch) doc/3RDPARTY (apply patch) Updated tzdata to 2025b (using 2025btgz) @ text @d30 1 a30 1 # From Paul Eggert (2024-11-18): d32 1 a32 4 # lines between time zones. Sandford Fleming of the Canadian Pacific Railway # argued for Dowd's proposal in 1876, and Cleveland Abbe of the American # Meteorology Society published a report in 1879 recommending four US time # zones based on GMT. However, the key individual who made time zones d188 20 a2388 75 # From Heitor David Pinto (2024-08-04): # In 1931, the decree implementing DST specified that it would take # effect on 30 April.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=192270&pagina=2&seccion=1 # # In 1981, the decree changing Campeche, Yucatán and Quintana Roo to UTC-5 # specified that it would enter into force on 26 December 1981 at 2:00.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4705667&fecha=23/12/1981&cod_diario=202796 # # In 1982, the decree returning Campeche and Yucatán to UTC-6 specified that # it would enter into force on 2 November 1982 at 2:00.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=205689&pagina=3&seccion=0 # # Quintana Roo changed to UTC-6 on 4 January 1983 at 0:00, and again # to UTC-5 on 26 October 1997 at 2:00.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4787355&fecha=28/12/1982&cod_diario=206112 # https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=209559&pagina=15&seccion=0 # # Durango, Coahuila, Nuevo León and Tamaulipas were set to UTC-7 on 1 January # 1922, and changed to UTC-6 on 10 June 1927. Then Durango, Coahuila and # Nuevo León (but not Tamaulipas) returned to UTC-7 on 15 November 1930, # observed DST in 1931, and changed again to UTC-6 on 1 April 1932.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4441846&fecha=29/12/1921&cod_diario=187468 # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4541520&fecha=09/06/1927&cod_diario=193920 # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4491963&fecha=15/11/1930&cod_diario=190835 # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4418437&fecha=21/01/1932&cod_diario=185588 # # ... the ... 10 June 1927 ... decree only said 10 June 1927, without # specifying a time, so I suppose that it should be considered at 0:00. # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4541520&fecha=09/06/1927&cod_diario=193920 # # In 1942, the decree changing Baja California, Baja California Sur, Sonora, # Sinaloa and Nayarit to UTC-7 was published on 24 April, but it said that it # would apply from 1 April, so it's unclear when the change actually # occurred. The database currently shows 24 April 1942. # https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=192203&pagina=2&seccion=1 # # Baja California Sur, Sonora, Sinaloa and Nayarit never used UTC-8. The ... # 14 January 1949 ... change [to UTC-8] only occurred in Baja California. # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4515613&fecha=13/01/1949&cod_diario=192309 # # In 1945, the decree changing Baja California to UTC-8 specified that it # would take effect on the third day from its publication. # It was published on 12 November, so it would take effect on 15 November.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4555049&fecha=12/11/1945&cod_diario=194763 # # In 1948, the decree changing Baja California to UTC-7 specified that it # would take effect on "this date". The decree was made on 13 March, # but published on 5 April, so it's unclear when the change actually occurred. # The database currently shows 5 April 1948. # https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=188624&pagina=2&seccion=0 # # In 1949, the decree changing Baja California to UTC-8 was published on 13 # January, but it said that it would apply from 1 January, so it's unclear when # the change actually occurred. The database currently shows 14 January 1949. # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4515613&fecha=13/01/1949&cod_diario=192309 # # Baja California also observed UTC-7 from 1 May to 24 September 1950, # from 29 April to 30 September 1951 at 2:00, # and from 27 April to 28 September 1952 at 2:00.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4600403&fecha=29/04/1950&cod_diario=197505 # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4623553&fecha=23/09/1950&cod_diario=198805 # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4469444&fecha=27/04/1951&cod_diario=189317 # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4533868&fecha=10/03/1952&cod_diario=193465 # # All changes in Baja California from 1948 to 1952 match those in California, # on the same dates or with a difference of one day. # So it may be easier to implement these changes as DST with rule CA # during this whole period. # # From Paul Eggert (2024-08-18): # For now, maintain the slightly-different history for Baja California, # as we have no information on whether 1948/1952 clocks in Tijuana followed # the decrees or followed San Diego. d2592 1 a2592 1 Rule Mexico 1931 only - Apr 30 0:00 1:00 D d2611 1 a2611 3 -6:00 - CST 1981 Dec 26 2:00 -5:00 - EST 1983 Jan 4 0:00 -6:00 Mexico C%sT 1997 Oct 26 2:00 d2617 2 a2618 2 -6:00 - CST 1981 Dec 26 2:00 -5:00 - EST 1982 Nov 2 2:00 a2634 3 -7:00 - MST 1927 Jun 10 -6:00 - CST 1930 Nov 15 -7:00 Mexico M%sT 1932 Apr 1 d2640 1 a2640 1 -7:00 - MST 1927 Jun 10 d2651 1 a2651 1 -7:00 - MST 1927 Jun 10 d2666 1 a2666 1 -7:00 - MST 1927 Jun 10 d2678 1 a2678 1 -7:00 - MST 1927 Jun 10 d2688 1 a2688 1 -7:00 - MST 1927 Jun 10 d2692 2 a2693 1 -7:00 - MST 1996 d2699 1 a2699 1 -7:00 - MST 1927 Jun 10 d2703 2 a2704 1 -7:00 - MST 1970 d2737 1 a2737 1 -7:00 - MST 1927 Jun 10 d2741 2 a2742 1 -7:00 - MST 1970 d2749 1 a2749 1 -8:00 - PST 1927 Jun 10 d2755 1 a2755 1 -8:00 1:00 PPT 1945 Nov 15 # Peace a2757 6 -8:00 - PST 1950 May 1 -8:00 1:00 PDT 1950 Sep 24 -8:00 - PST 1951 Apr 29 2:00 -8:00 1:00 PDT 1951 Sep 30 2:00 -8:00 - PST 1952 Apr 27 2:00 -8:00 1:00 PDT 1952 Sep 28 2:00 d3618 2 a3619 2 -3:00 - %z 1987 -3:00 Canada %z @ 1.1.1.32.2.5 log @Pull up following revision(s) (requested by kre in ticket #1094): external/public-domain/tz/dist/northamerica: revision 1.4 external/public-domain/tz/dist/version: revision 1.15 external/public-domain/tz/dist/asia: revision 1.15 external/public-domain/tz/dist/zonenow.tab: revision 1.4 external/public-domain/tz/dist/southamerica: revision 1.4 external/public-domain/tz/dist/zone1970.tab: revision 1.4 external/public-domain/tz/dist/NEWS: revision 1.4 external/public-domain/tz/dist/TZDATA_VERSION: revision 1.42 external/public-domain/tz/dist/zone.tab: revision 1.4 Merge tzdata2025b @ text @a1617 9 # From Paul Eggert (2025-03-20): # Also see the 1912-06-17 front page of The Evening Sunbeam, # reproduced in: Richardson M. "Daylight saving was a confusing # time in Orillia" in the 2025-03-15 Orillia Matters. Richardson writes, # "The first Sunday after the switch was made, [DST proponent and # Orillia mayor William Sword] Frost walked into church an hour late. # This became a symbol of the downfall of daylight saving in Orillia." # The mayor became known as "Daylight Bill". # https://www.orilliamatters.com/local-news/column-daylight-saving-was-a-confusing-time-in-orillia-10377529 @ 1.1.1.33 log @Import tzdata2023a from https://github.com/JodaOrg/global-tz/releases/download/2023agtz/tzdata2023agtz.tar.gz Summary of changes in tzdata2023a (2023-03-22 12:39:33 -0700): * Starting in 2023, Egypt will observe DST from April's last Friday through October's last Thursday. * In 2023 Morocco's summer time start transition after Ramadan will occur April 23, not April 30. * This year Palestine will delay the start of summer time from March 25 to April 29 due to Ramadan. * Much of Greenland, represented by America/Nuuk, will continue to observe DST using European Union rules. * America/Yellowknife has changed from a Zone to a backward compatibility Link, as it no longer differs from America/Edmonton since 1970. * Changes to commentary. @ text @d279 2 a280 2 # From Paul Eggert (2023-01-23), from a 2001-01-08 heads-up from Rives McDow: # Public law 106-564 (2000-12-23) introduced "Chamorro standard time" a281 1 # Also see 15 U.S.C. §263 . d598 1 a598 1 # One opinion of the early 1980s turmoil in Alaska over time zones and a669 4 # From Paul Eggert (2023-01-23): # America/Adak is for the Aleutian Islands that are part of Alaska # and are west of 169.5° W. d2141 4 d2338 3 d2577 1 a2577 1 # Now the northern [municipios] want to have the same time zone as the d2614 1 a2614 1 # This includes the following municipios: d2640 2 a2641 2 # This includes the municipios of Janos, Ascensión, Juárez, Guadalupe, and # Práxedis G Guerrero. d2655 1 a2655 2 # This includes the municipios of Coyame del Sotol, Ojinaga, and Manuel # Benavides. d3111 1 a3111 1 # http://www.prensalatina.com.mx/article.asp?ID={4CC32C1B-A9F7-42FB-8A07-8631AFC923AF}&language=ES @ 1.1.1.34 log @Import tzdata2023d from https://github.com/JodaOrg/global-tz/releases/download/2023dgtz/tzdata2023dgtz.tar.gz Summary of changes in tzdata2023d (2023-12-21 20:02:24 -0800): * Ittoqqortoormiit, Greenland (America/Scoresbysund) joins most of the rest of Greenland's timekeeping practice on 2024-03-31, by changing its time zone from -01/+00 to -02/-01. * Fix predictions for DST transitions in Palestine in 2072-2075, correcting a typo introduced in 2023a. * Various fixes to zones for several Antarctic bases. @ text @d1456 1 a1456 1 # St John's has an apostrophe, but POSIX file names can't have apostrophes. @ 1.1.1.35 log @Import tzdata2024a from https://github.com/JodaOrg/global-tz/releases/download/2024agtz/tzdata2024agtz.tar.gz Summary of changes in tzdata2024a (2024-02-01 09:28:56 -0800): * Kazakhstan unifies on UTC+5. * Palestine summer time begins a week later than previously predicted in 2024 and 2025. * Historic corrections for Asia/Ho_Chi_Minh (1955) America/Toronto (1947-9) and America/Miquelon (1911). @ text @a1270 4 # For the 1911/1912 establishment of standard time in French possessions, see: # Société Française de Physique, Recueil de constantes physiques (1913), # page 752, 18b. # d1357 1 a1357 1 # https://web.archive.org/web/19990827055050/https://canadiangeographic.ca/SO98/geomap.htm a1648 9 # From Chris Walton (2024-01-09): # The [Toronto] changes in 1947, 1948, and 1949 took place at 2:00 a.m. local # time instead of midnight.... Toronto Daily Star - ... # April 2, 1947 - Page 39 ... April 7, 1948 - Page 13 ... # April 2, 1949 - Page 1 ... April 7, 1949 - Page 24 ... # November 25, 1949 - Page 52 ... April 21, 1950 - Page 14 ... # September 19, 1950 - Page 46 ... September 20, 1950 - Page 3 ... # November 24, 1950 - Page 21 d1710 7 a1716 3 Rule Toronto 1945 1948 - Sep lastSun 2:00 0 S Rule Toronto 1946 1973 - Apr lastSun 2:00 1:00 D Rule Toronto 1949 1950 - Nov lastSun 2:00 0 S d3504 1 a3504 1 -4:04:20 - FFMT 1911 May 1 # Fort-de-France MT d3607 1 a3607 1 Zone America/Miquelon -3:44:40 - LMT 1911 Jun 15 # St Pierre @ 1.1.1.35.2.1 log @Sync with HEAD @ text @d30 1 a30 1 # From Paul Eggert (2024-11-18): d32 1 a32 4 # lines between time zones. Sandford Fleming of the Canadian Pacific Railway # argued for Dowd's proposal in 1876, and Cleveland Abbe of the American # Meteorology Society published a report in 1879 recommending four US time # zones based on GMT. However, the key individual who made time zones d188 20 a1634 9 # From Paul Eggert (2025-03-20): # Also see the 1912-06-17 front page of The Evening Sunbeam, # reproduced in: Richardson M. "Daylight saving was a confusing # time in Orillia" in the 2025-03-15 Orillia Matters. Richardson writes, # "The first Sunday after the switch was made, [DST proponent and # Orillia mayor William Sword] Frost walked into church an hour late. # This became a symbol of the downfall of daylight saving in Orillia." # The mayor became known as "Daylight Bill". # https://www.orilliamatters.com/local-news/column-daylight-saving-was-a-confusing-time-in-orillia-10377529 a2388 75 # From Heitor David Pinto (2024-08-04): # In 1931, the decree implementing DST specified that it would take # effect on 30 April.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=192270&pagina=2&seccion=1 # # In 1981, the decree changing Campeche, Yucatán and Quintana Roo to UTC-5 # specified that it would enter into force on 26 December 1981 at 2:00.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4705667&fecha=23/12/1981&cod_diario=202796 # # In 1982, the decree returning Campeche and Yucatán to UTC-6 specified that # it would enter into force on 2 November 1982 at 2:00.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=205689&pagina=3&seccion=0 # # Quintana Roo changed to UTC-6 on 4 January 1983 at 0:00, and again # to UTC-5 on 26 October 1997 at 2:00.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4787355&fecha=28/12/1982&cod_diario=206112 # https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=209559&pagina=15&seccion=0 # # Durango, Coahuila, Nuevo León and Tamaulipas were set to UTC-7 on 1 January # 1922, and changed to UTC-6 on 10 June 1927. Then Durango, Coahuila and # Nuevo León (but not Tamaulipas) returned to UTC-7 on 15 November 1930, # observed DST in 1931, and changed again to UTC-6 on 1 April 1932.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4441846&fecha=29/12/1921&cod_diario=187468 # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4541520&fecha=09/06/1927&cod_diario=193920 # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4491963&fecha=15/11/1930&cod_diario=190835 # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4418437&fecha=21/01/1932&cod_diario=185588 # # ... the ... 10 June 1927 ... decree only said 10 June 1927, without # specifying a time, so I suppose that it should be considered at 0:00. # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4541520&fecha=09/06/1927&cod_diario=193920 # # In 1942, the decree changing Baja California, Baja California Sur, Sonora, # Sinaloa and Nayarit to UTC-7 was published on 24 April, but it said that it # would apply from 1 April, so it's unclear when the change actually # occurred. The database currently shows 24 April 1942. # https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=192203&pagina=2&seccion=1 # # Baja California Sur, Sonora, Sinaloa and Nayarit never used UTC-8. The ... # 14 January 1949 ... change [to UTC-8] only occurred in Baja California. # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4515613&fecha=13/01/1949&cod_diario=192309 # # In 1945, the decree changing Baja California to UTC-8 specified that it # would take effect on the third day from its publication. # It was published on 12 November, so it would take effect on 15 November.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4555049&fecha=12/11/1945&cod_diario=194763 # # In 1948, the decree changing Baja California to UTC-7 specified that it # would take effect on "this date". The decree was made on 13 March, # but published on 5 April, so it's unclear when the change actually occurred. # The database currently shows 5 April 1948. # https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=188624&pagina=2&seccion=0 # # In 1949, the decree changing Baja California to UTC-8 was published on 13 # January, but it said that it would apply from 1 January, so it's unclear when # the change actually occurred. The database currently shows 14 January 1949. # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4515613&fecha=13/01/1949&cod_diario=192309 # # Baja California also observed UTC-7 from 1 May to 24 September 1950, # from 29 April to 30 September 1951 at 2:00, # and from 27 April to 28 September 1952 at 2:00.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4600403&fecha=29/04/1950&cod_diario=197505 # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4623553&fecha=23/09/1950&cod_diario=198805 # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4469444&fecha=27/04/1951&cod_diario=189317 # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4533868&fecha=10/03/1952&cod_diario=193465 # # All changes in Baja California from 1948 to 1952 match those in California, # on the same dates or with a difference of one day. # So it may be easier to implement these changes as DST with rule CA # during this whole period. # # From Paul Eggert (2024-08-18): # For now, maintain the slightly-different history for Baja California, # as we have no information on whether 1948/1952 clocks in Tijuana followed # the decrees or followed San Diego. d2592 1 a2592 1 Rule Mexico 1931 only - Apr 30 0:00 1:00 D d2611 1 a2611 3 -6:00 - CST 1981 Dec 26 2:00 -5:00 - EST 1983 Jan 4 0:00 -6:00 Mexico C%sT 1997 Oct 26 2:00 d2617 2 a2618 2 -6:00 - CST 1981 Dec 26 2:00 -5:00 - EST 1982 Nov 2 2:00 a2634 3 -7:00 - MST 1927 Jun 10 -6:00 - CST 1930 Nov 15 -7:00 Mexico M%sT 1932 Apr 1 d2640 1 a2640 1 -7:00 - MST 1927 Jun 10 d2651 1 a2651 1 -7:00 - MST 1927 Jun 10 d2666 1 a2666 1 -7:00 - MST 1927 Jun 10 d2678 1 a2678 1 -7:00 - MST 1927 Jun 10 d2688 1 a2688 1 -7:00 - MST 1927 Jun 10 d2692 2 a2693 1 -7:00 - MST 1996 d2699 1 a2699 1 -7:00 - MST 1927 Jun 10 d2703 2 a2704 1 -7:00 - MST 1970 d2737 1 a2737 1 -7:00 - MST 1927 Jun 10 d2741 2 a2742 1 -7:00 - MST 1970 d2749 1 a2749 1 -8:00 - PST 1927 Jun 10 d2755 1 a2755 1 -8:00 1:00 PPT 1945 Nov 15 # Peace a2757 6 -8:00 - PST 1950 May 1 -8:00 1:00 PDT 1950 Sep 24 -8:00 - PST 1951 Apr 29 2:00 -8:00 1:00 PDT 1951 Sep 30 2:00 -8:00 - PST 1952 Apr 27 2:00 -8:00 1:00 PDT 1952 Sep 28 2:00 d3618 2 a3619 2 -3:00 - %z 1987 -3:00 Canada %z @ 1.1.1.36 log @Import tzdata2024b from https://github.com/JodaOrg/global-tz/releases/download/2024bgtz/tzdata2024bgtz.tar.gz Summary of changes in tzdata2024b (2024-09-04 12:27:47 -0700): * Asia/Choibalsan is now an alias for Asia/Ulaanbaatar rather than being a separate Zone with differing behavior before April 2008. * Historical transitions for Mexico have been updated based on official Mexican decrees. * Historical transitions for Portugal, represented by Europe/Lisbon, Atlantic/Azores, and Atlantic/Madeira, have been updated based on a close reading of old Portuguese legislation, replacing previous data mainly originating from Whitman and Shanks & Pottenger. * Changes to documentation. * Changes to commentary. None of these changes are significant, so no pullups of this update are planned. The next update, whenever that occurs, when something that matters alters, is likely to be pulled up. @ text @d188 20 a2388 75 # From Heitor David Pinto (2024-08-04): # In 1931, the decree implementing DST specified that it would take # effect on 30 April.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=192270&pagina=2&seccion=1 # # In 1981, the decree changing Campeche, Yucatán and Quintana Roo to UTC-5 # specified that it would enter into force on 26 December 1981 at 2:00.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4705667&fecha=23/12/1981&cod_diario=202796 # # In 1982, the decree returning Campeche and Yucatán to UTC-6 specified that # it would enter into force on 2 November 1982 at 2:00.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=205689&pagina=3&seccion=0 # # Quintana Roo changed to UTC-6 on 4 January 1983 at 0:00, and again # to UTC-5 on 26 October 1997 at 2:00.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4787355&fecha=28/12/1982&cod_diario=206112 # https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=209559&pagina=15&seccion=0 # # Durango, Coahuila, Nuevo León and Tamaulipas were set to UTC-7 on 1 January # 1922, and changed to UTC-6 on 10 June 1927. Then Durango, Coahuila and # Nuevo León (but not Tamaulipas) returned to UTC-7 on 15 November 1930, # observed DST in 1931, and changed again to UTC-6 on 1 April 1932.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4441846&fecha=29/12/1921&cod_diario=187468 # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4541520&fecha=09/06/1927&cod_diario=193920 # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4491963&fecha=15/11/1930&cod_diario=190835 # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4418437&fecha=21/01/1932&cod_diario=185588 # # ... the ... 10 June 1927 ... decree only said 10 June 1927, without # specifying a time, so I suppose that it should be considered at 0:00. # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4541520&fecha=09/06/1927&cod_diario=193920 # # In 1942, the decree changing Baja California, Baja California Sur, Sonora, # Sinaloa and Nayarit to UTC-7 was published on 24 April, but it said that it # would apply from 1 April, so it's unclear when the change actually # occurred. The database currently shows 24 April 1942. # https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=192203&pagina=2&seccion=1 # # Baja California Sur, Sonora, Sinaloa and Nayarit never used UTC-8. The ... # 14 January 1949 ... change [to UTC-8] only occurred in Baja California. # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4515613&fecha=13/01/1949&cod_diario=192309 # # In 1945, the decree changing Baja California to UTC-8 specified that it # would take effect on the third day from its publication. # It was published on 12 November, so it would take effect on 15 November.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4555049&fecha=12/11/1945&cod_diario=194763 # # In 1948, the decree changing Baja California to UTC-7 specified that it # would take effect on "this date". The decree was made on 13 March, # but published on 5 April, so it's unclear when the change actually occurred. # The database currently shows 5 April 1948. # https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=188624&pagina=2&seccion=0 # # In 1949, the decree changing Baja California to UTC-8 was published on 13 # January, but it said that it would apply from 1 January, so it's unclear when # the change actually occurred. The database currently shows 14 January 1949. # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4515613&fecha=13/01/1949&cod_diario=192309 # # Baja California also observed UTC-7 from 1 May to 24 September 1950, # from 29 April to 30 September 1951 at 2:00, # and from 27 April to 28 September 1952 at 2:00.... # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4600403&fecha=29/04/1950&cod_diario=197505 # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4623553&fecha=23/09/1950&cod_diario=198805 # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4469444&fecha=27/04/1951&cod_diario=189317 # https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4533868&fecha=10/03/1952&cod_diario=193465 # # All changes in Baja California from 1948 to 1952 match those in California, # on the same dates or with a difference of one day. # So it may be easier to implement these changes as DST with rule CA # during this whole period. # # From Paul Eggert (2024-08-18): # For now, maintain the slightly-different history for Baja California, # as we have no information on whether 1948/1952 clocks in Tijuana followed # the decrees or followed San Diego. d2592 1 a2592 1 Rule Mexico 1931 only - April 30 0:00 1:00 D d2611 1 a2611 3 -6:00 - CST 1981 Dec 26 2:00 -5:00 - EST 1983 Jan 4 0:00 -6:00 Mexico C%sT 1997 Oct 26 2:00 d2617 2 a2618 2 -6:00 - CST 1981 Dec 26 2:00 -5:00 - EST 1982 Nov 2 2:00 a2634 3 -7:00 - MST 1927 Jun 10 -6:00 - CST 1930 Nov 15 -7:00 Mexico M%sT 1932 Apr 1 d2640 1 a2640 1 -7:00 - MST 1927 Jun 10 d2651 1 a2651 1 -7:00 - MST 1927 Jun 10 d2666 1 a2666 1 -7:00 - MST 1927 Jun 10 d2678 1 a2678 1 -7:00 - MST 1927 Jun 10 d2688 1 a2688 1 -7:00 - MST 1927 Jun 10 d2692 2 a2693 1 -7:00 - MST 1996 d2699 1 a2699 1 -7:00 - MST 1927 Jun 10 d2703 2 a2704 1 -7:00 - MST 1970 d2737 1 a2737 1 -7:00 - MST 1927 Jun 10 d2741 2 a2742 1 -7:00 - MST 1970 d2749 1 a2749 1 -8:00 - PST 1927 Jun 10 d2755 1 a2755 1 -8:00 1:00 PPT 1945 Nov 15 # Peace a2757 6 -8:00 - PST 1950 May 1 -8:00 1:00 PDT 1950 Sep 24 -8:00 - PST 1951 Apr 29 2:00 -8:00 1:00 PDT 1951 Sep 30 2:00 -8:00 - PST 1952 Apr 27 2:00 -8:00 1:00 PDT 1952 Sep 28 2:00 d3618 2 a3619 2 -3:00 - %z 1987 -3:00 Canada %z @ 1.1.1.37 log @Import tzdata2025a from ftp://ftp.iana.org/tz/releases/tzdata2025a.tar.gz Summary of changes in tzdata2025a (2025-01-15 10:47:24 -0800): * Paraguay stopped changing its clocks after the forward transition on 2024-10-06, so it is now permanently at -03. * Correct timestamps for the Philippines before 1900, and from 1937 through 1990. @ text @d30 1 a30 1 # From Paul Eggert (2024-11-18): d32 1 a32 4 # lines between time zones. Sandford Fleming of the Canadian Pacific Railway # argued for Dowd's proposal in 1876, and Cleveland Abbe of the American # Meteorology Society published a report in 1879 recommending four US time # zones based on GMT. However, the key individual who made time zones d1591 4 a1712 1 # The Bahamas match Toronto since 1970. d1721 7 a1727 1 # For Atikokan see America/Panama. d1971 5 a1975 1 # For Creston see America/Phoenix. d2647 1 a2647 1 Rule Mexico 1931 only - Apr 30 0:00 1:00 D d2857 26 d3095 9 d3329 5 d3380 16 d3581 5 a3650 1 # Cayman Is a3651 2 # # Atikokan and Coral Harbour, Canada, match Panama since 1970. a3656 9 # Anguilla # Antigua & Barbuda # Aruba # Caribbean Netherlands # Curaçao # Dominica # Grenada # Guadeloupe # Montserrat a3657 8 # St Barthélemy # St Kitts-Nevis # Sint Maarten / St Martin # St Lucia # St Vincent & the Grenadines # Trinidad & Tobago # Virgin Is (UK & US) # d3665 11 d3684 9 d3762 10 @ 1.1.1.38 log @Import tzdata2025a from https://github.com/JodaOrg/global-tz/releases/download/2025agtz/tzdata2025agtz.tar.gz Summary of changes in tzdata2025a (2025-01-15 10:47:24 -0800): * Paraguay stopped changing its clocks after the forward transition on 2024-10-06, so it is now permanently at -03. * Correct timestamps for the Philippines before 1900, and from 1937 through 1990. @ text @a1593 4 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Blanc-Sablon -3:48:28 - LMT 1884 -4:00 Canada A%sT 1970 -4:00 - AST d1712 1 d1721 1 a1721 7 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Atikokan -6:06:28 - LMT 1895 -6:00 Canada C%sT 1940 Sep 29 -6:00 1:00 CDT 1942 Feb 9 2:00s -6:00 Canada C%sT 1945 Sep 30 2:00 -5:00 - EST #PACKRATLIST zone.tab Link America/Atikokan America/Coral_Harbour d1965 1 a1965 5 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Creston -7:46:04 - LMT 1884 -7:00 - MST 1916 Oct 1 -8:00 - PST 1918 Jun 2 -7:00 - MST a2846 26 # Anguilla # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Anguilla -4:12:16 - LMT 1912 Mar 2 -4:00 - AST # Antigua & Barbuda # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Antigua -4:07:12 - LMT 1912 Mar 2 -5:00 - EST 1951 -4:00 - AST # The Bahamas # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Bahamas 1942 only - May 1 24:00 1:00 W Rule Bahamas 1944 only - Dec 31 24:00 0 S Rule Bahamas 1945 only - Feb 1 0:00 1:00 W Rule Bahamas 1945 only - Aug 14 23:00u 1:00 P # Peace Rule Bahamas 1945 only - Oct 17 24:00 0 S Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Nassau -5:09:30 - LMT 1912 Mar 2 -5:00 Bahamas E%sT 1976 -5:00 US E%sT a3058 9 # Caribbean Netherlands # See America/Kralendijk in southamerica. # Cayman Is # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown -5:07:10 - KMT 1912 Feb # Kingston Mean Time -5:00 - EST a3283 5 # Dominica # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau -4:00 - AST a3329 16 # Grenada # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Grenada -4:07:00 - LMT 1911 Jul # St George's -4:00 - AST # Guadeloupe # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe-à-Pitre -4:00 - AST # St Barthélemy # See America/St_Barthelemy in southamerica. # St Martin (French part) # See America/Marigot in southamerica. a3514 5 # Montserrat # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Cork Hill -4:00 - AST d3580 1 d3582 2 d3589 9 d3599 8 a3613 11 # St Kitts-Nevis # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre -4:00 - AST # St Lucia # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/St_Lucia -4:04:00 - LMT 1890 # Castries -4:04:00 - CMT 1912 # Castries Mean Time -4:00 - AST a3621 9 # St Vincent & the Grenadines # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown -4:04:56 - KMT 1912 # Kingstown Mean Time -4:00 - AST # Sint Maarten # See America/Lower_Princes in southamerica. a3690 10 # British Virgin Is # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town -4:00 - AST # US Virgin Is # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie -4:00 - AST @ 1.1.1.39 log @Import tzdata2025b from https://github.com/JodaOrg/global-tz/releases/download/2025bgtz/tzdata2025bgtz.tar.gz Summary of changes in tzdata2025b (2025-03-22 13:40:46 -0700): * Chile's Aysén Region moves from -04/-03 to -03 year-round, joining Magallanes Region. * Iran switched from +04 to +0330 on 1978-11-10 at 24:00, not at year end. Zones added by this update: America/Coyhaique @ text @a1617 9 # From Paul Eggert (2025-03-20): # Also see the 1912-06-17 front page of The Evening Sunbeam, # reproduced in: Richardson M. "Daylight saving was a confusing # time in Orillia" in the 2025-03-15 Orillia Matters. Richardson writes, # "The first Sunday after the switch was made, [DST proponent and # Orillia mayor William Sword] Frost walked into church an hour late. # This became a symbol of the downfall of daylight saving in Orillia." # The mayor became known as "Daylight Bill". # https://www.orilliamatters.com/local-news/column-daylight-saving-was-a-confusing-time-in-orillia-10377529 @ 1.1.1.40 log @Import tzdata2025c from https://github.com/JodaOrg/global-tz/releases/download/2025cgtz/tzdata2025cgtz.tar.gz Summary of changes in tzdata2025c (2025-12-10 14:42:37 -0800): * Baja California agreed with California’s DST rules in 1953 and in 1961 through 1975, instead of observing standard time all year. * Changes to commentary. @ text @d9 3 a11 3 # go ahead and edit the file, and please send any changes to # the public mailing list tz@@iana.org for general use in the future. # For more, please see the file CONTRIBUTING in the tz distribution. a1220 10 # From Rob van Gent (2025-07-23): # Another useful source for historical time zone information appears to be # a series of circulars with the title "Standard Time Throughout the World" # issued between 1925 and 1950 by the U.S. Bureau of Standards. # I found the following issues online: # https://nvlpubs.nist.gov/nistpubs/Legacy/circ/nbscircular280.pdf (1925) # https://nvlpubs.nist.gov/nistpubs/Legacy/circ/nbscircular399.pdf (1932) # https://nvlpubs.nist.gov/nistpubs/Legacy/circ/nbscircular406.pdf (1935) # https://nvlpubs.nist.gov/nistpubs/Legacy/circ/nbscircular496.pdf (1950) d2450 3 a2452 17 # From Alois Treindl (2025-07-29): # I did a quick newspaper archive research on https://hndm.iib.unam.mx/ # and found that Periódico Oficial del Estado de Baja California Norte # (1973-04-20) states clearly that DST was observed from last Sunday # in April to last Sunday in October.... I have a few more data from the # official bulletin for DST begin or end in Baja California 1964 1967 1969 # 1972 1973 (already sent) 1974 1975 1976 I do not know whether it is safe to # assume that it also applied in the years where I did not yet find proof. # The 1974 end of DST contains a reference to an Acuerdo of 1973-dec-20 which # I could not find.... One might assume that Baja California, which followed # US-CA in all these other yours, did the same. # # From Paul Eggert (2025-08-04): # Assume that Tijuana agreed with San Diego from 1953 through 1996, # as this agrees with Alois Treindl's data and with Shanks. # For now, keep the slightly-different 1948/1952 history for Baja California, a2455 9 # From Mark Schapiro, writing in The Nation (2002-10-28): # https://www.thenation.com/article/archive/sowing-disaster/ # When Mexican clocks were turned back for daylight saving time in the spring, # the Zapotecs refused to make the adjustment, insisting that they live in # "God's time," not in what they derisively call "Fox time," referring to # President Vicente Fox in far-off Mexico City. # From Paul Eggert (2025-08-04): # Unfortunately we have no data to track this informal practice. d2721 1 a2721 1 # https://gaceta.diputados.gob.mx/PDF/65/2022/nov/20221124-VII.pdf d2736 1 a2736 1 # https://gaceta.diputados.gob.mx/PDF/65/2022/nov/20221124-VII.pdf d2833 3 a2835 1 -8:00 CA P%sT 1967 @ 1.1.1.41 log @Import tzdata2026bgtz from https://github.com/JodaOrg/global-tz/releases/download/2026bgtz/tzdata2026bgtz.tar.gz One change of note: British Columbia moved to permanent -07 on 2026-03-09. @ text @a1968 50 # From Arthur David Olson (2026-03-02): # B. C. Gov News: “Adopting permanent daylight saving time: ‘Spring forward’ # on March 8 will be the last time change, ending twice-yearly clock changes.” # https://news.gov.bc.ca/releases/2026AG0013-000209 # # From Paul Eggert (2026-03-07): # The law says that 21 hours after the usual 2026-03-08 02:00 switch from # PST to PDT, the next day inaugurates the new standard time Pacific Time, # i.e., just one clock change but two name changes separated by 21 hours. # PT, the obvious abbreviation for Pacific Time, is one letter too short # to conform to TZDB’s (and POSIX’s) [-+[:alnum:]]{3,6} requirements. # I asked the BC government for advice, with no response. For now, do this: # 1. As a temporary hack, pretend that the BC law takes effect # not on 2026-03-09 at 00:00, but on 2026-11-01 at 02:00. # This pretense works around a limitation in CLDR v48.2 (2026-03-17), # which would otherwise say the interval uses “Pacific Standard Time”. # (Below, this temporary hack is marked “Temporary hack; see above.”) # Strictly speaking this hack is incorrect since the interval uses # standard time, but it does have the right UT offset and it # works around the CLDR limitation. We should be able to remove # the temporary hack after CLDR is fixed. # 2. After the BC law takes effect, model the time as MST sans DST. # We can change this later if another conforming non-numeric abbreviation # for Pacific Time becomes more popular. Possibilities include: # MST - the most compatible with existing software and practice, # and already used in parts of BC and in Yukon # PDT - almost as software-friendly, but confusing because it implies # it is DST and is paired with PST, whereas PT is standard time # PST - straightforward but even more confusing, # and will likely break much software that assumes PST is -08 # -07 - accurate and clear in itself, but makes BC look odd vs neighbors # CPT, CPST - for Canadian Pacific (Standard) Time, # by analogy with AEST in Australia # P-T - conforming approximation to “PT” # PT+ - like P-T but suggesting one-hour advance over PST # From Chris Walton (2026-03-15): # The Regional District of East Kootenay is planning to move to year-round # Mountain Standard Time (MST) on November 1, 2026.... # https://www.rdek.bc.ca/news/entry/rdek_board_moves_to_transition_to_year_round_mountain_standard_time # (2026-03-17): # The final decision East Kootenay made a few days ago may turn out not to # be final after all. They are going to reopen the debate next month! # https://www.cbc.ca/news/canada/british-columbia/what-time-is-it-in-the-east-kootenay-debate-9.7132624 # From Paul Eggert (2026-03-17): # Mayor Steve Fairbairn of Elkford asked the question be called a second time, # saying, “Pardon the pun, but this is not a time-sensitive issue.” # For now, merely mention the potential change in these comments. # If it happens it would likely affect clocks starting 2027-03-14 at 02:00. d1982 1 a1982 5 -8:00 Canada P%sT 2026 Mar 9 # Temporary hack; see above. -8:00 1:00 PDT 2026 Nov 1 02:00 # End of temporary hack. -7:00 - MST @ 1.1.1.1.6.1 log @file northamerica was added on branch tls-maxphys on 2014-08-20 00:00:21 +0000 @ text @d1 3148 @ 1.1.1.1.6.2 log @Rebase to HEAD as of a few days ago. @ text @a0 3148 # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. # also includes Central America and the Caribbean # This data is by no means authoritative; if you think you know better, # go ahead and edit the file (and please send any changes to # tz@@iana.org for general use in the future). # From Paul Eggert (1999-03-22): # A reliable and entertaining source about time zones is # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). ############################################################################### # United States # From Paul Eggert (1999-03-31): # Howse writes (pp 121-125) that time zones were invented by # Professor Charles Ferdinand Dowd (1825-1904), # Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). # His pamphlet "A System of National Time for Railroads" (1870) # was the result of his proposals at the Convention of Railroad Trunk Lines # in New York City (1869-10). His 1870 proposal was based on Washington, DC, # but in 1872-05 he moved the proposed origin to Greenwich. # His proposal was adopted by the railroads on 1883-11-18 at 12:00, # and the most of the country soon followed suit. # From Paul Eggert (2005-04-16): # That 1883 transition occurred at 12:00 new time, not at 12:00 old time. # See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). # From Paul Eggert (2006-03-22): # A good source for time zone historical data in the US is # Thomas G. Shanks, The American Atlas (5th edition), # San Diego: ACS Publications, Inc. (1991). # Make sure you have the errata sheet; the book is somewhat useless without it. # It is the source for most of the pre-1991 US entries below. # From Paul Eggert (2001-03-06): # Daylight Saving Time was first suggested as a joke by Benjamin Franklin # in his whimsical essay "An Economical Project for Diminishing the Cost # of Light" published in the Journal de Paris (1784-04-26). # Not everyone is happy with the results: # # I don't really care how time is reckoned so long as there is some # agreement about it, but I object to being told that I am saving # daylight when my reason tells me that I am doing nothing of the kind. # I even object to the implication that I am wasting something # valuable if I stay in bed after the sun has risen. As an admirer # of moonlight I resent the bossy insistence of those who want to # reduce my time for enjoying it. At the back of the Daylight Saving # scheme I detect the bony, blue-fingered hand of Puritanism, eager # to push people into bed earlier, and get them up earlier, to make # them healthy, wealthy and wise in spite of themselves. # # -- Robertson Davies, The diary of Samuel Marchbanks, # Clarke, Irwin (1947), XIX, Sunday # # For more about the first ten years of DST in the United States, see # Robert Garland, Ten years of daylight saving from the Pittsburgh standpoint # (Carnegie Library of Pittsburgh, 1927) # . # # Shanks says that DST was called "War Time" in the US in 1918 and 1919. # However, DST was imposed by the Standard Time Act of 1918, which # was the first nationwide legal time standard, and apparently # time was just called "Standard Time" or "Daylight Saving Time". # From Arthur David Olson: # US Daylight Saving Time ended on the last Sunday of *October* in 1974. # See, for example, the front page of the Saturday, 1974-10-26 # and Sunday, 1974-10-27 editions of the Washington Post. # From Arthur David Olson: # Before the Uniform Time Act of 1966 took effect in 1967, observance of # Daylight Saving Time in the US was by local option, except during wartime. # From Arthur David Olson (2000-09-25): # Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. # In the introduction, Oboler spoke of "Eastern Peace Time." # An AltaVista search turned up # : # "When the time is announced over the radio now, it is 'Eastern Peace # Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." # (August 1945) by way of confirmation. # From Joseph Gallant citing # George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): # At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set # to switch to London for Attlee's address, but the American people # never got to hear his speech live. According to one press account, # CBS' Bob Trout was first to announce the word of Japan's surrender, # but a few seconds later, NBC, ABC and Mutual also flashed the word # of surrender, all of whom interrupting the bells of Big Ben in # London which were to precede Mr. Attlee's speech. # From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From # Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: # # ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. # Any announcement from Asia would reach St. John's New York newsroom on a # wire service teletype machine, which had prescribed signals for major news. # Associated Press, for example, would ring five bells before spewing out # typed copy of an important story, and 10 bells for news "of transcendental # importance." # # On Aug. 14, stalling while talking steadily into the NBC networks' open # microphone, St. John heard five bells and waited only to hear a sixth bell, # before announcing confidently: "Ladies and gentlemen, World War II is over. # The Japanese have agreed to our surrender terms." # # He had scored a 20-second scoop on other broadcasters. # From Arthur David Olson (2005-08-22): # Paul has been careful to use the "US" rules only in those locations # that are part of the United States; this reflects the real scope of # U.S. government action. So even though the "US" rules have changed # in the latest release, other countries won't be affected. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule US 1918 1919 - Mar lastSun 2:00 1:00 D Rule US 1918 1919 - Oct lastSun 2:00 0 S Rule US 1942 only - Feb 9 2:00 1:00 W # War Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace Rule US 1945 only - Sep 30 2:00 0 S Rule US 1967 2006 - Oct lastSun 2:00 0 S Rule US 1967 1973 - Apr lastSun 2:00 1:00 D Rule US 1974 only - Jan 6 2:00 1:00 D Rule US 1975 only - Feb 23 2:00 1:00 D Rule US 1976 1986 - Apr lastSun 2:00 1:00 D Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D Rule US 2007 max - Mar Sun>=8 2:00 1:00 D Rule US 2007 max - Nov Sun>=1 2:00 0 S # From Arthur David Olson, 2005-12-19 # We generate the files specified below to guard against old files with # obsolete information being left in the time zone binary directory. # We limit the list to names that have appeared in previous versions of # this time zone package. # We do these as separate Zones rather than as Links to avoid problems if # a particular place changes whether it observes DST. # We put these specifications here in the northamerica file both to # increase the chances that they'll actually get compiled and to # avoid the need to duplicate the US rules in another file. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone EST -5:00 - EST Zone MST -7:00 - MST Zone HST -10:00 - HST Zone EST5EDT -5:00 US E%sT Zone CST6CDT -6:00 US C%sT Zone MST7MDT -7:00 US M%sT Zone PST8PDT -8:00 US P%sT # From Bob Devine (1988-01-28): # ...Alaska (and Hawaii) had the timezone names changed in 1967. # old new # Pacific Standard Time(PST) -same- # Yukon Standard Time(YST) -same- # Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) # Nome Standard Time (NT) Bering Standard Time (BST) # # ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. # The YST zone now covers nearly all of the state, AHST just part # of the Aleutian islands. No DST. # From Paul Eggert (1995-12-19): # The tables below use 'NST', not 'NT', for Nome Standard Time. # I invented 'CAWT' for Central Alaska War Time. # From U. S. Naval Observatory (1989-01-19): # USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON # USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 # USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON # USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 # USA MOUNTAIN 7 H BEHIND UTC DENVER # USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 # USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO # USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 # USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) # USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) # USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W # USA " 9 H BEHIND UTC APR 3 - OCT 30 # USA HAWAII 10 H BEHIND UTC # USA BERING 11 H BEHIND UTC SAMOA, MIDWAY # From Arthur David Olson (1989-01-21): # The above dates are for 1988. # Note the "AKST" and "AKDT" abbreviations, the claim that there's # no DST in Samoa, and the claim that there is DST in Alaska and the # Aleutians. # From Arthur David Olson (1988-02-13): # Legal standard time zone names, from United States Code (1982 Edition and # Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names # up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 # took effect), as explained in sections 263 and 261: # (none) # United States standard eastern time # United States standard mountain time # United States standard central time # United States standard Pacific time # (none) # United States standard Alaska time # (none) # Next, names from 1967-04-01 until 1983-11-30 (the date for # public law 98-181): # Atlantic standard time # eastern standard time # central standard time # mountain standard time # Pacific standard time # Yukon standard time # Alaska-Hawaii standard time # Bering standard time # And after 1983-11-30: # Atlantic standard time # eastern standard time # central standard time # mountain standard time # Pacific standard time # Alaska standard time # Hawaii-Aleutian standard time # Samoa standard time # The law doesn't give abbreviations. # # From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: # Public law 106-564 (2000-12-23) introduced the abbreviation # "Chamorro Standard Time" for time in Guam and the Northern Marianas. # See the file "australasia". # From Arthur David Olson, 2005-08-09 # The following was signed into law on 2005-08-08. # # H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. # (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15 # U.S.C. 260a(a)) is amended-- # (1) by striking "first Sunday of April" and inserting "second # Sunday of March"; and # (2) by striking "last Sunday of October" and inserting "first # Sunday of November'. # (b) Effective Date.--Subsection (a) shall take effect 1 year after the # date of enactment of this Act or March 1, 2007, whichever is later. # (c) Report to Congress.--Not later than 9 months after the effective # date stated in subsection (b), the Secretary shall report to Congress # on the impact of this section on energy consumption in the United # States. # (d) Right to Revert.--Congress retains the right to revert the # Daylight Saving Time back to the 2005 time schedules once the # Department study is complete. # US eastern time, represented by New York # Connecticut, Delaware, District of Columbia, most of Florida, # Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky # (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, # New Hampshire, New Jersey, New York, North Carolina, Ohio, # Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, # Vermont, Virginia, West Virginia # From Dave Cantor (2004-11-02): # Early this summer I had the occasion to visit the Mount Washington # Observatory weather station atop (of course!) Mount Washington [, NH].... # One of the staff members said that the station was on Eastern Standard Time # and didn't change their clocks for Daylight Saving ... so that their # reports will always have times which are 5 hours behind UTC. # From Paul Eggert (2005-08-26): # According to today's Huntsville Times # # a few towns on Alabama's "eastern border with Georgia, such as Phenix City # in Russell County, Lanett in Chambers County and some towns in Lee County, # set their watches and clocks on Eastern time." It quotes H.H. "Bubba" # Roberts, city administrator in Phenix City. as saying "We are in the Central # time zone, but we do go by the Eastern time zone because so many people work # in Columbus." # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule NYC 1920 only - Mar lastSun 2:00 1:00 D Rule NYC 1920 only - Oct lastSun 2:00 0 S Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D Rule NYC 1921 1954 - Sep lastSun 2:00 0 S Rule NYC 1955 1966 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 -5:00 US E%sT 1920 -5:00 NYC E%sT 1942 -5:00 US E%sT 1946 -5:00 NYC E%sT 1967 -5:00 US E%sT # US central time, represented by Chicago # Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, # Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and # Washington counties), Illinois, western Indiana # (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, # Vanderburgh, and Warrick counties), Iowa, most of Kansas, western # Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern # Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, # western Tennessee, most of Texas, Wisconsin # From Larry M. Smith (2006-04-26) re Wisconsin: # http://www.legis.state.wi.us/statutes/Stat0175.pdf ... # is currently enforced at the 01:00 time of change. Because the local # "bar time" in the state corresponds to 02:00, a number of citations # are issued for the "sale of class 'B' alcohol after prohibited # hours" within the deviated hour of this change every year.... # # From Douglas R. Bomberg (2007-03-12): # Wisconsin has enacted (nearly eleventh-hour) legislation to get WI # Statue 175 closer in synch with the US Congress' intent.... # http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Chicago 1920 only - Jun 13 2:00 1:00 D Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 -6:00 US C%sT 1920 -6:00 Chicago C%sT 1936 Mar 1 2:00 -5:00 - EST 1936 Nov 15 2:00 -6:00 Chicago C%sT 1942 -6:00 US C%sT 1946 -6:00 Chicago C%sT 1967 -6:00 US C%sT # Oliver County, ND switched from mountain to central time on 1992-10-25. Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 -7:00 US M%sT 1992 Oct 25 02:00 -6:00 US C%sT # Morton County, ND, switched from mountain to central time on # 2003-10-26, except for the area around Mandan which was already central time. # See . # Officially this switch also included part of Sioux County, and # Jones, Mellette, and Todd Counties in South Dakota; # but in practice these other counties were already observing central time. # See . Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 -7:00 US M%sT 2003 Oct 26 02:00 -6:00 US C%sT # From Josh Findley (2011-01-21): # ...it appears that Mercer County, North Dakota, changed from the # mountain time zone to the central time zone at the last transition from # daylight-saving to standard time (on Nov. 7, 2010): # http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm # http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html # From Andy Lipscomb (2011-01-24): # ...according to the Census Bureau, the largest city is Beulah (although # it's commonly referred to as Beulah-Hazen, with Hazen being the next # largest city in Mercer County). Google Maps places Beulah's city hall # at 47 degrees 15' 51" N, 101 degrees 46' 40" W, which yields an offset # of 6h47'07". Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53 -7:00 US M%sT 2010 Nov 7 2:00 -6:00 US C%sT # US mountain time, represented by Denver # # Colorado, far western Kansas, Montana, western # Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), # New Mexico, southwestern North Dakota, # western South Dakota, far western Texas (El Paso County, Hudspeth County, # and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming # # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D Rule Denver 1920 only - Oct lastSun 2:00 0 S Rule Denver 1921 only - May 22 2:00 0 S Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D Rule Denver 1965 1966 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 -7:00 US M%sT 1920 -7:00 Denver M%sT 1942 -7:00 US M%sT 1946 -7:00 Denver M%sT 1967 -7:00 US M%sT # US Pacific time, represented by Los Angeles # # California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, # Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county # north of the Salmon River, and the towns of Burgdorf and Warren), # Nevada (except West Wendover), Oregon (except the northern 3/4 of # Malheur county), and Washington # # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule CA 1948 only - Mar 14 2:00 1:00 D Rule CA 1949 only - Jan 1 2:00 0 S Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D Rule CA 1950 1961 - Sep lastSun 2:00 0 S Rule CA 1962 1966 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 -8:00 US P%sT 1946 -8:00 CA P%sT 1967 -8:00 US P%sT # Alaska # AK%sT is the modern abbreviation for -9:00 per USNO. # # From Paul Eggert (2001-05-30): # Howse writes that Alaska switched from the Julian to the Gregorian calendar, # and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. # This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, # also a Friday. Include only the time zone part of this transition, # ignoring the switch from Julian to Gregorian, since we can't represent # the Julian calendar. # # As far as we know, none of the exact locations mentioned below were # permanently inhabited in 1867 by anyone using either calendar. # (Yakutat was colonized by the Russians in 1799, but the settlement # was destroyed in 1805 by a Yakutat-kon war party.) However, there # were nearby inhabitants in some cases and for our purposes perhaps # it's best to simply use the official transition. # From Paul Eggert (2014-07-18): # One opinion of the early-1980s turmoil in Alaska over time zones and # daylight saving time appeared as graffiti on a Juneau airport wall: # "Welcome to Juneau. Please turn your watch back to the 19th century." # See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01. # http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html # # Steve Ferguson (2011-01-31) referred to the following source: # Norris F. Keeping time in Alaska: national directives, local response. # Alaska History 2001;16(1-2). # http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/keeping-time-in-alaska/ # From Arthur David Olson (2011-02-01): # Here's database-relevant material from the 2001 "Alaska History" article: # # On September 20 [1979]...DOT...officials decreed that on April 27, # 1980, Juneau and other nearby communities would move to Yukon Time. # Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on # Pacific Time. # # ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the # Department's September 1979 decision. Juneau and other communities in # northern Southeast reverted to Pacific Time on October 26. # # On October 28 [1983]...the Metlakatla Indian Community Council voted # unanimously to keep the reservation on Pacific Time. # # According to DOT official Joanne Petrie, Indian reservations are not # bound to follow time zones imposed by neighboring jurisdictions. # # (The last is consistent with how the database now handles the Navajo # Nation.) # From Arthur David Olson (2011-02-09): # I just spoke by phone with a staff member at the Metlakatla Indian # Community office (using contact information available at # http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla # It's shortly after 1:00 here on the east coast of the United States; # the staffer said it was shortly after 10:00 there. When I asked whether # that meant they were on Pacific time, they said no - they were on their # own time. I asked about daylight saving; they said it wasn't used. I # did not inquire about practices in the past. # From Arthur David Olson (2011-08-17): # For lack of better information, assume that Metlakatla's # abandonment of use of daylight saving resulted from the 1983 vote. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Juneau 15:02:19 - LMT 1867 Oct 18 -8:57:41 - LMT 1900 Aug 20 12:00 -8:00 - PST 1942 -8:00 US P%sT 1946 -8:00 - PST 1969 -8:00 US P%sT 1980 Apr 27 2:00 -9:00 US Y%sT 1980 Oct 26 2:00 -8:00 US P%sT 1983 Oct 30 2:00 -9:00 US Y%sT 1983 Nov 30 -9:00 US AK%sT Zone America/Sitka 14:58:47 - LMT 1867 Oct 18 -9:01:13 - LMT 1900 Aug 20 12:00 -8:00 - PST 1942 -8:00 US P%sT 1946 -8:00 - PST 1969 -8:00 US P%sT 1983 Oct 30 2:00 -9:00 US Y%sT 1983 Nov 30 -9:00 US AK%sT Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 18 -8:46:18 - LMT 1900 Aug 20 12:00 -8:00 - PST 1942 -8:00 US P%sT 1946 -8:00 - PST 1969 -8:00 US P%sT 1983 Oct 30 2:00 -8:00 - PST Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18 -9:18:55 - LMT 1900 Aug 20 12:00 -9:00 - YST 1942 -9:00 US Y%sT 1946 -9:00 - YST 1969 -9:00 US Y%sT 1983 Nov 30 -9:00 US AK%sT Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18 -9:59:36 - LMT 1900 Aug 20 12:00 -10:00 - CAT 1942 -10:00 US CAT/CAWT 1945 Aug 14 23:00u -10:00 US CAT/CAPT 1946 # Peace -10:00 - CAT 1967 Apr -10:00 - AHST 1969 -10:00 US AH%sT 1983 Oct 30 2:00 -9:00 US Y%sT 1983 Nov 30 -9:00 US AK%sT Zone America/Nome 12:58:21 - LMT 1867 Oct 18 -11:01:38 - LMT 1900 Aug 20 12:00 -11:00 - NST 1942 -11:00 US N%sT 1946 -11:00 - NST 1967 Apr -11:00 - BST 1969 -11:00 US B%sT 1983 Oct 30 2:00 -9:00 US Y%sT 1983 Nov 30 -9:00 US AK%sT Zone America/Adak 12:13:21 - LMT 1867 Oct 18 -11:46:38 - LMT 1900 Aug 20 12:00 -11:00 - NST 1942 -11:00 US N%sT 1946 -11:00 - NST 1967 Apr -11:00 - BST 1969 -11:00 US B%sT 1983 Oct 30 2:00 -10:00 US AH%sT 1983 Nov 30 -10:00 US HA%sT # The following switches don't quite make our 1970 cutoff. # # Shanks writes that part of southwest Alaska (e.g. Aniak) # switched from -11:00 to -10:00 on 1968-09-22 at 02:00, # and another part (e.g. Akiak) made the same switch five weeks later. # # From David Flater (2004-11-09): # In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska # Historic Preservation Commission, provided this information, which # suggests that Unalaska deviated from statutory time from early 1967 # possibly until 1983: # # Minutes of the Unalaska City Council Meeting, January 10, 1967: # "Except for St. Paul and Akutan, Unalaska is the only important # location not on Alaska Standard Time. The following resolution was # made by William Robinson and seconded by Henry Swanson: Be it # resolved that the City of Unalaska hereby goes to Alaska Standard # Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, # January 14, Alaska Standard Time.) This resolution was passed with # three votes for and one against." # Hawaii # From Arthur David Olson (2010-12-09): # "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225 # of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09, # the article is available at # http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf # and indicates that standard time was adopted effective noon, January # 13, 1896 (page 218), that in "1933, the Legislature decreed daylight # saving for the period between the last Sunday of each April and the # last Sunday of each September, but less than a month later repealed the # act," (page 220), that year-round daylight saving time was in effect # from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for # when clocks changed) and that clocks were changed by 30 minutes # effective the second Sunday of June, 1947 (page 219, with no time of # day given for when clocks changed). A footnote for the 1933 changes # cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933) # and Act 163 (approved 21 May 1933)." # From Arthur David Olson (2011-01-19): # The following is from "Laws of the Territory of Hawaii Passed by the # Seventeenth Legislature: Regular Session 1933," available (as of # 2011-01-19) at American University's Pence Law Library. Page 85: "Act # 90...At 2 o'clock ante meridian of the last Sunday in April of each # year, the standard time of this Territory shall be advanced one # hour...This Act shall take effect upon its approval. Approved this 26th # day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of # Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is # hereby repealed...This Act shall take effect upon its approval, upon # which date the standard time of this Territory shall be restored to # that existing immediately prior to the taking effect of said Act 90. # Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor # of the Territory of Hawaii." # # Note that 1933-05-21 was a Sunday. # We're left to guess the time of day when Act 163 was approved; guess noon. Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 #Schmitt&Cox -10:30 - HST 1933 Apr 30 2:00 #Laws 1933 -10:30 1:00 HDT 1933 May 21 12:00 #Laws 1933+12 -10:30 - HST 1942 Feb 09 2:00 #Schmitt&Cox+2 -10:30 1:00 HDT 1945 Sep 30 2:00 #Schmitt&Cox+2 -10:30 - HST 1947 Jun 8 2:00 #Schmitt&Cox+2 -10:00 - HST Link Pacific/Honolulu Pacific/Johnston # Now we turn to US areas that have diverged from the consensus since 1970. # Arizona mostly uses MST. # From Paul Eggert (2002-10-20): # # The information in the rest of this paragraph is derived from the # Daylight Saving Time web page # (2002-01-23) # maintained by the Arizona State Library, Archives and Public Records. # Between 1944-01-01 and 1944-04-01 the State of Arizona used standard # time, but by federal law railroads, airlines, bus lines, military # personnel, and some engaged in interstate commerce continued to # observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix # Gazette says that was the date the law changed, and that 04-01 was # the date the state's clocks would change. In 1945 the State of # Arizona used standard time all year, again with exceptions only as # mandated by federal law. Arizona observed DST in 1967, but Arizona # Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. # # Shanks says the 1944 experiment came to an end on 1944-03-17. # Go with the Arizona State Library instead. Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 -7:00 US M%sT 1944 Jan 1 00:01 -7:00 - MST 1944 Apr 1 00:01 -7:00 US M%sT 1944 Oct 1 00:01 -7:00 - MST 1967 -7:00 US M%sT 1968 Mar 21 -7:00 - MST # From Arthur David Olson (1988-02-13): # A writer from the Inter Tribal Council of Arizona, Inc., # notes in private correspondence dated 1987-12-28 that "Presently, only the # Navajo Nation participates in the Daylight Saving Time policy, due to its # large size and location in three states." (The "only" means that other # tribal nations don't use DST.) # # From Paul Eggert (2013-08-26): # See America/Denver for a zone appropriate for the Navajo Nation. # Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, # Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, # Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, # Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, # Teton, Twin Falls, Valley, Washington counties, and the southern # quarter of Idaho county) and eastern Oregon (most of Malheur County) # switched four weeks late in 1974. # # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 -8:00 US P%sT 1923 May 13 2:00 -7:00 US M%sT 1974 -7:00 - MST 1974 Feb 3 2:00 -7:00 US M%sT # Indiana # # For a map of Indiana's time zone regions, see: # What time is it in Indiana? (2006-03-01) # # # From Paul Eggert (2007-08-17): # Since 1970, most of Indiana has been like America/Indiana/Indianapolis, # with the following exceptions: # # - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, # Vanderburgh, and Warrick counties have been like America/Chicago. # # - Dearborn and Ohio counties have been like America/New_York. # # - Clark, Floyd, and Harrison counties have been like # America/Kentucky/Louisville. # # - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, # and Switzerland counties have their own time zone histories as noted below. # # Shanks partitioned Indiana into 345 regions, each with its own time history, # and wrote "Even newspaper reports present contradictory information." # Those Hoosiers! Such a flighty and changeable people! # Fortunately, most of the complexity occurred before our cutoff date of 1970. # # Other than Indianapolis, the Indiana place names are so nondescript # that they would be ambiguous if we left them at the 'America' level. # So we reluctantly put them all in a subdirectory 'America/Indiana'. # From Paul Eggert (2005-08-16): # http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006. # From Paul Eggert (2014-06-26): # https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana # says "DOT is relocating the time zone boundary in Indiana to move Starke, # Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the # Eastern Time Zone to the Central Time Zone.... The effective date of # this rule is 2 a.m. EST Sunday, April 2, 2006, which is the # changeover date from standard time to Daylight Saving Time." # Strictly speaking, this meant the affected counties changed their # clocks twice that night, but this obviously was in error. The intent # was that 01:59:59 EST be followed by 02:00:00 CDT. # From Gwillim Law (2007-02-10): # The Associated Press has been reporting that Pulaski County, Indiana is # going to switch from Central to Eastern Time on March 11, 2007.... # http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 -6:00 US C%sT 1920 -6:00 Indianapolis C%sT 1942 -6:00 US C%sT 1946 -6:00 Indianapolis C%sT 1955 Apr 24 2:00 -5:00 - EST 1957 Sep 29 2:00 -6:00 - CST 1958 Apr 27 2:00 -5:00 - EST 1969 -5:00 US E%sT 1971 -5:00 - EST 2006 -5:00 US E%sT # # Eastern Crawford County, Indiana, left its clocks alone in 1974, # as well as from 1976 through 2005. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D Rule Marengo 1951 only - Sep lastSun 2:00 0 S Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 -6:00 US C%sT 1951 -6:00 Marengo C%sT 1961 Apr 30 2:00 -5:00 - EST 1969 -5:00 US E%sT 1974 Jan 6 2:00 -6:00 1:00 CDT 1974 Oct 27 2:00 -5:00 US E%sT 1976 -5:00 - EST 2006 -5:00 US E%sT # # Daviess, Dubois, Knox, and Martin Counties, Indiana, # switched from eastern to central time in April 2006, then switched back # in November 2007. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D Rule Vincennes 1946 only - Sep lastSun 2:00 0 S Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S Rule Vincennes 1955 only - May 1 0:00 1:00 D Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D Rule Vincennes 1960 only - Oct lastSun 2:00 0 S Rule Vincennes 1961 only - Sep lastSun 2:00 0 S Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 -6:00 US C%sT 1946 -6:00 Vincennes C%sT 1964 Apr 26 2:00 -5:00 - EST 1969 -5:00 US E%sT 1971 -5:00 - EST 2006 Apr 2 2:00 -6:00 US C%sT 2007 Nov 4 2:00 -5:00 US E%sT # # Perry County, Indiana, switched from eastern to central time in April 2006. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Perry 1946 only - Apr lastSun 2:00 1:00 D Rule Perry 1946 only - Sep lastSun 2:00 0 S Rule Perry 1953 1954 - Apr lastSun 2:00 1:00 D Rule Perry 1953 1959 - Sep lastSun 2:00 0 S Rule Perry 1955 only - May 1 0:00 1:00 D Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D Rule Perry 1960 only - Oct lastSun 2:00 0 S Rule Perry 1961 only - Sep lastSun 2:00 0 S Rule Perry 1962 1963 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 -6:00 US C%sT 1946 -6:00 Perry C%sT 1964 Apr 26 2:00 -5:00 - EST 1969 -5:00 US E%sT 1971 -5:00 - EST 2006 Apr 2 2:00 -6:00 US C%sT # # Pike County, Indiana moved from central to eastern time in 1977, # then switched back in 2006, then switched back again in 2007. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Pike 1955 only - May 1 0:00 1:00 D Rule Pike 1955 1960 - Sep lastSun 2:00 0 S Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D Rule Pike 1961 1964 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 -6:00 US C%sT 1955 -6:00 Pike C%sT 1965 Apr 25 2:00 -5:00 - EST 1966 Oct 30 2:00 -6:00 US C%sT 1977 Oct 30 2:00 -5:00 - EST 2006 Apr 2 2:00 -6:00 US C%sT 2007 Nov 4 2:00 -5:00 US E%sT # # Starke County, Indiana moved from central to eastern time in 1991, # then switched back in 2006. # From Arthur David Olson (1991-10-28): # An article on page A3 of the Sunday, 1991-10-27 Washington Post # notes that Starke County switched from Central time to Eastern time as of # 1991-10-27. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D Rule Starke 1947 1954 - Sep lastSun 2:00 0 S Rule Starke 1955 1956 - Oct lastSun 2:00 0 S Rule Starke 1957 1958 - Sep lastSun 2:00 0 S Rule Starke 1959 1961 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 -6:00 US C%sT 1947 -6:00 Starke C%sT 1962 Apr 29 2:00 -5:00 - EST 1963 Oct 27 2:00 -6:00 US C%sT 1991 Oct 27 2:00 -5:00 - EST 2006 Apr 2 2:00 -6:00 US C%sT # # Pulaski County, Indiana, switched from eastern to central time in # April 2006 and then switched back in March 2007. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 -6:00 US C%sT 1946 -6:00 Pulaski C%sT 1961 Apr 30 2:00 -5:00 - EST 1969 -5:00 US E%sT 1971 -5:00 - EST 2006 Apr 2 2:00 -6:00 US C%sT 2007 Mar 11 2:00 -5:00 US E%sT # # Switzerland County, Indiana, did not observe DST from 1973 through 2005. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 -6:00 US C%sT 1954 Apr 25 2:00 -5:00 - EST 1969 -5:00 US E%sT 1973 -5:00 - EST 2006 -5:00 US E%sT # Part of Kentucky left its clocks alone in 1974. # This also includes Clark, Floyd, and Harrison counties in Indiana. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Louisville 1921 only - May 1 2:00 1:00 D Rule Louisville 1921 only - Sep 1 2:00 0 S Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D Rule Louisville 1941 only - Sep lastSun 2:00 0 S Rule Louisville 1946 only - Jun 2 2:00 0 S Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 -6:00 US C%sT 1921 -6:00 Louisville C%sT 1942 -6:00 US C%sT 1946 -6:00 Louisville C%sT 1961 Jul 23 2:00 -5:00 - EST 1968 -5:00 US E%sT 1974 Jan 6 2:00 -6:00 1:00 CDT 1974 Oct 27 2:00 -5:00 US E%sT # # Wayne County, Kentucky # # From Lake Cumberland LIFE # # (1999-01-29) via WKYM-101.7: # Clinton County has joined Wayne County in asking the DoT to change from # the Central to the Eastern time zone.... The Wayne County government made # the same request in December. And while Russell County officials have not # taken action, the majority of respondents to a poll conducted there in # August indicated they would like to change to "fast time" also. # The three Lake Cumberland counties are the farthest east of any U.S. # location in the Central time zone. # # From Rich Wales (2000-08-29): # After prolonged debate, and despite continuing deep differences of opinion, # Wayne County (central Kentucky) is switching from Central (-0600) to Eastern # (-0500) time. They won't "fall back" this year. See Sara Shipley, # The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). # # From Paul Eggert (2001-07-16): # The final rule was published in the # Federal Register 65, 160 (2000-08-17), pp 50154-50158. # # Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 -6:00 US C%sT 1946 -6:00 - CST 1968 -6:00 US C%sT 2000 Oct 29 2:00 -5:00 US E%sT # From Rives McDow (2000-08-30): # Here ... are all the changes in the US since 1985. # Kearny County, KS (put all of county on central; # previously split between MST and CST) ... 1990-10 # Starke County, IN (from CST to EST) ... 1991-10 # Oliver County, ND (from MST to CST) ... 1992-10 # West Wendover, NV (from PST TO MST) ... 1999-10 # Wayne County, KY (from CST to EST) ... 2000-10 # # From Paul Eggert (2001-07-17): # We don't know where the line used to be within Kearny County, KS, # so omit that change for now. # See America/Indiana/Knox for the Starke County, IN change. # See America/North_Dakota/Center for the Oliver County, ND change. # West Wendover, NV officially switched from Pacific to mountain time on # 1999-10-31. See the # Federal Register 64, 203 (1999-10-21), pp 56705-56707. # # However, the Federal Register says that West Wendover already operated # on mountain time, and the rule merely made this official; # hence a separate tz entry is not needed. # Michigan # # From Bob Devine (1988-01-28): # Michigan didn't observe DST from 1968 to 1973. # # From Paul Eggert (1999-03-31): # Shanks writes that Michigan started using standard time on 1885-09-18, # but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) # that Detroit kept # # local time until 1900 when the City Council decreed that clocks should # be put back twenty-eight minutes to Central Standard Time. Half the # city obeyed, half refused. After considerable debate, the decision # was rescinded and the city reverted to Sun time. A derisive offer to # erect a sundial in front of the city hall was referred to the # Committee on Sewers. Then, in 1905, Central time was adopted # by city vote. # # This story is too entertaining to be false, so go with Howse over Shanks. # # From Paul Eggert (2001-03-06): # Garland (1927) writes "Cleveland and Detroit advanced their clocks # one hour in 1914." This change is not in Shanks. We have no more # info, so omit this for now. # # Most of Michigan observed DST from 1973 on, but was a bit late in 1975. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D Rule Detroit 1948 only - Sep lastSun 2:00 0 S Rule Detroit 1967 only - Jun 14 2:00 1:00 D Rule Detroit 1967 only - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Detroit -5:32:11 - LMT 1905 -6:00 - CST 1915 May 15 2:00 -5:00 - EST 1942 -5:00 US E%sT 1946 -5:00 Detroit E%sT 1973 -5:00 US E%sT 1975 -5:00 - EST 1975 Apr 27 2:00 -5:00 US E%sT # # Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, # switched from EST to CST/CDT in 1973. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D Rule Menominee 1946 only - Sep lastSun 2:00 0 S Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D Rule Menominee 1966 only - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 -6:00 US C%sT 1946 -6:00 Menominee C%sT 1969 Apr 27 2:00 -5:00 - EST 1973 Apr 29 2:00 -6:00 US C%sT # Navassa # administered by the US Fish and Wildlife Service # claimed by US under the provisions of the 1856 Guano Islands Act # also claimed by Haiti # occupied 1857/1900 by the Navassa Phosphate Co # US lighthouse 1917/1996-09 # currently uninhabited # see Mark Fineman, "An Isle Rich in Guano and Discord", # _Los Angeles Times_ (1998-11-10), A1, A10; it cites # Jimmy Skaggs, _The Great Guano Rush_ (1994). ################################################################################ # From Paul Eggert (2006-03-22): # A good source for time zone historical data outside the U.S. is # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), # San Diego: ACS Publications, Inc. (2003). # # Gwillim Law writes that a good source # for recent time zone data is the International Air Transport # Association's Standard Schedules Information Manual (IATA SSIM), # published semiannually. Law sent in several helpful summaries # of the IATA's data after 1990. # # Except where otherwise noted, Shanks & Pottenger is the source for # entries through 1990, and IATA SSIM is the source for entries afterwards. # # Other sources occasionally used include: # # Edward W. Whitman, World Time Differences, # Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), # which I found in the UCLA library. # # William Willett, The Waste of Daylight, 19th edition # # [PDF] (1914-03) # # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 # . # # See the 'europe' file for Greenland. # Canada # From Alain LaBonté (1994-11-14): # I post here the time zone abbreviations standardized in Canada # for both English and French in the CAN/CSA-Z234.4-89 standard.... # # UTC Standard time Daylight saving time # offset French English French English # -2:30 - - HAT NDT # -3 - - HAA ADT # -3:30 HNT NST - - # -4 HNA AST HAE EDT # -5 HNE EST HAC CDT # -6 HNC CST HAR MDT # -7 HNR MST HAP PDT # -8 HNP PST HAY YDT # -9 HNY YST - - # # HN: Heure Normale ST: Standard Time # HA: Heure Avancée DT: Daylight saving Time # # A: de l'Atlantique Atlantic # C: du Centre Central # E: de l'Est Eastern # M: Mountain # N: Newfoundland # P: du Pacifique Pacific # R: des Rocheuses # T: de Terre-Neuve # Y: du Yukon Yukon # # From Paul Eggert (1994-11-22): # Alas, this sort of thing must be handled by localization software. # Unless otherwise specified, the data for Canada are all from Shanks # & Pottenger. # From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, # 2007-03-01): # The British Columbia government announced yesterday that it will # adjust daylight savings next year to align with changes in the # U.S. and the rest of Canada.... # http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm # ... # Nova Scotia # Daylight saving time will be extended by four weeks starting in 2007.... # http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf # # [For New Brunswick] the new legislation dictates that the time change is to # be done at 02:00 instead of 00:01. # http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf # ... # Manitoba has traditionally changed the clock every fall at 03:00. # As of 2006, the transition is to take place one hour earlier at 02:00. # http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php # ... # [Alberta, Ontario, Quebec] will follow US rules. # http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM # http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm # http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF # ... # P.E.I. will follow US rules.... # http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf # ... # Province of Newfoundland and Labrador.... # http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm # ... # Yukon # http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf # ... # N.W.T. will follow US rules. Whoever maintains the government web site # does not seem to believe in bookmarks. To see the news release, click the # following link and search for "Daylight Savings Time Change". Press the # "Daylight Savings Time Change" link; it will fire off a popup using # JavaScript. # http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive # ... # Nunavut # An amendment to the Interpretation Act was registered on February 19/2007.... # http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf # From Paul Eggert (2006-04-25): # H. David Matthews and Mary Vincent's map # "It's about TIME", _Canadian Geographic_ (September-October 1998) # # contains detailed boundaries for regions observing nonstandard # time and daylight saving time arrangements in Canada circa 1998. # # INMS, the Institute for National Measurement Standards in Ottawa, has # information about standard and daylight saving time zones in Canada. # # (updated periodically). # Its unofficial information is often taken from Matthews and Vincent. # From Paul Eggert (2006-06-27): # For now, assume all of DST-observing Canada will fall into line with the # new US DST rules, # From Chris Walton (2011-12-01) # In the first of Tammy Hardwick's articles # http://www.ilovecreston.com/?p=articles&t=spec&ar=260 # she quotes the Friday November 1/1918 edition of the Creston Review. # The quote includes these two statements: # 'Sunday the CPR went back to the old system of time...' # '... The daylight saving scheme was dropped all over Canada at the same time,' # These statements refer to a transition from daylight time to standard time # that occurred nationally on Sunday October 27/1918. This transition was # also documented in the Saturday October 26/1918 edition of the Toronto Star. # In light of that evidence, we alter the date from the earlier believed # Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day # than Thursday) in all Canadian rulesets. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Canada 1918 only - Apr 14 2:00 1:00 D Rule Canada 1918 only - Oct 27 2:00 0 S Rule Canada 1942 only - Feb 9 2:00 1:00 W # War Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace Rule Canada 1945 only - Sep 30 2:00 0 S Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D Rule Canada 1974 2006 - Oct lastSun 2:00 0 S Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D Rule Canada 2007 max - Nov Sun>=1 2:00 0 S # Newfoundland and Labrador # From Paul Eggert (2000-10-02): # Matthews and Vincent (1998) write that Labrador should use NST/NDT, # but the only part of Labrador that follows the rules is the # southeast corner, including Port Hope Simpson and Mary's Harbour, # but excluding, say, Black Tickle. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule StJohns 1917 only - Apr 8 2:00 1:00 D Rule StJohns 1917 only - Sep 17 2:00 0 S # Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. Rule StJohns 1919 only - May 5 23:00 1:00 D Rule StJohns 1919 only - Aug 12 23:00 0 S # For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S # For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & # Pottenger. Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S # Whitman gives the following transitions: # 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 # but go with Shanks & Pottenger and assume they used Canadian rules. # For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives # Apr 30 - Sep 24; go with Shanks & Pottenger. Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S # From Paul Eggert (2000-10-02): # INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches # at 00:01 local time. For now, assume it started in 1987. # From Michael Pelley (2011-09-12): # We received today, Monday, September 12, 2011, notification that the # changes to the Newfoundland Standard Time Act have been proclaimed. # The change in the Act stipulates that the change from Daylight Savings # Time to Standard Time and from Standard Time to Daylight Savings Time # now occurs at 2:00AM. # ... # http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm # ... # MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery # Office of the Chief Information Officer # Executive Council # Government of Newfoundland & Labrador Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D Rule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D Rule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S # # St John's has an apostrophe, but Posix file names can't have apostrophes. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/St_Johns -3:30:52 - LMT 1884 -3:30:52 StJohns N%sT 1918 -3:30:52 Canada N%sT 1919 -3:30:52 StJohns N%sT 1935 Mar 30 -3:30 StJohns N%sT 1942 May 11 -3:30 Canada N%sT 1946 -3:30 StJohns N%sT 2011 Nov -3:30 Canada N%sT # most of east Labrador # The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay -3:30:52 - NST 1918 -3:30:52 Canada N%sT 1919 -3:30:52 - NST 1935 Mar 30 -3:30 - NST 1936 -3:30 StJohns N%sT 1942 May 11 -3:30 Canada N%sT 1946 -3:30 StJohns N%sT 1966 Mar 15 2:00 -4:00 StJohns A%sT 2011 Nov -4:00 Canada A%sT # west Labrador, Nova Scotia, Prince Edward I # From Paul Eggert (2006-03-22): # Shanks & Pottenger write that since 1970 most of this region has been like # Halifax. Many locales did not observe peacetime DST until 1972; # Glace Bay, NS is the largest that we know of. # Shanks & Pottenger also write that Liverpool, NS was the only town # in Canada to observe DST in 1971 but not 1970; for now we'll assume # this is a typo. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Halifax 1916 only - Apr 1 0:00 1:00 D Rule Halifax 1916 only - Oct 1 0:00 0 S Rule Halifax 1920 only - May 9 0:00 1:00 D Rule Halifax 1920 only - Aug 29 0:00 0 S Rule Halifax 1921 only - May 6 0:00 1:00 D Rule Halifax 1921 1922 - Sep 5 0:00 0 S Rule Halifax 1922 only - Apr 30 0:00 1:00 D Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D Rule Halifax 1923 only - Sep 4 0:00 0 S Rule Halifax 1924 only - Sep 15 0:00 0 S Rule Halifax 1925 only - Sep 28 0:00 0 S Rule Halifax 1926 only - May 16 0:00 1:00 D Rule Halifax 1926 only - Sep 13 0:00 0 S Rule Halifax 1927 only - May 1 0:00 1:00 D Rule Halifax 1927 only - Sep 26 0:00 0 S Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D Rule Halifax 1928 only - Sep 9 0:00 0 S Rule Halifax 1929 only - Sep 3 0:00 0 S Rule Halifax 1930 only - Sep 15 0:00 0 S Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S Rule Halifax 1932 only - May 1 0:00 1:00 D Rule Halifax 1933 only - Apr 30 0:00 1:00 D Rule Halifax 1933 only - Oct 2 0:00 0 S Rule Halifax 1934 only - May 20 0:00 1:00 D Rule Halifax 1934 only - Sep 16 0:00 0 S Rule Halifax 1935 only - Jun 2 0:00 1:00 D Rule Halifax 1935 only - Sep 30 0:00 0 S Rule Halifax 1936 only - Jun 1 0:00 1:00 D Rule Halifax 1936 only - Sep 14 0:00 0 S Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S Rule Halifax 1939 only - May 28 0:00 1:00 D Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Halifax -4:14:24 - LMT 1902 Jun 15 -4:00 Halifax A%sT 1918 -4:00 Canada A%sT 1919 -4:00 Halifax A%sT 1942 Feb 9 2:00s -4:00 Canada A%sT 1946 -4:00 Halifax A%sT 1974 -4:00 Canada A%sT Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 -4:00 Canada A%sT 1953 -4:00 Halifax A%sT 1954 -4:00 - AST 1972 -4:00 Halifax A%sT 1974 -4:00 Canada A%sT # New Brunswick # From Paul Eggert (2007-01-31): # The Time Definition Act # says they changed at 00:01 through 2006, and # makes it # clear that this was the case since at least 1993. # For now, assume it started in 1993. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S Rule Moncton 1939 only - May 27 1:00 1:00 D Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S Rule Moncton 1940 only - May 19 1:00 1:00 D Rule Moncton 1941 only - May 4 1:00 1:00 D Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Moncton -4:19:08 - LMT 1883 Dec 9 -5:00 - EST 1902 Jun 15 -4:00 Canada A%sT 1933 -4:00 Moncton A%sT 1942 -4:00 Canada A%sT 1946 -4:00 Moncton A%sT 1973 -4:00 Canada A%sT 1993 -4:00 Moncton A%sT 2007 -4:00 Canada A%sT # Quebec # From Paul Eggert (2013-08-30): # Since 1970 most of Quebec has been like Toronto. # However, because earlier versions of the tz database mistakenly relied on data # from Shanks & Pottenger saying that Quebec differed from Ontario after 1970, # a separate entry was created for most of Quebec. We're loath to lose # its pre-1970 info, even though the tz database is normally limited to # zones that differ after 1970, so keep this otherwise out-of-scope entry. # Matthews and Vincent (1998) also write that Quebec east of the -63 # meridian is supposed to observe AST, but residents as far east as # Natashquan use EST/EDT, and residents east of Natashquan use AST. # The Quebec department of justice writes in # "The situation in Minganie and Basse-Côte-Nord" # http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm # that the coastal strip from just east of Natashquan to Blanc-Sablon # observes Atlantic standard time all year round. # http://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en # says this common practice was codified into law as of 2007. # For lack of better info, guess this practice began around 1970, contra to # Shanks & Pottenger who have this region observing AST/ADT. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Mont 1917 only - Mar 25 2:00 1:00 D Rule Mont 1917 only - Apr 24 0:00 0 S Rule Mont 1919 only - Mar 31 2:30 1:00 D Rule Mont 1919 only - Oct 25 2:30 0 S Rule Mont 1920 only - May 2 2:30 1:00 D Rule Mont 1920 1922 - Oct Sun>=1 2:30 0 S Rule Mont 1921 only - May 1 2:00 1:00 D Rule Mont 1922 only - Apr 30 2:00 1:00 D Rule Mont 1924 only - May 17 2:00 1:00 D Rule Mont 1924 1926 - Sep lastSun 2:30 0 S Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D # The 1927-to-1937 rules can be expressed more simply as # Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D # Rule Mont 1927 1937 - Sep lastSat 24:00 0 S # The rules below avoid use of 24:00 # (which pre-1998 versions of zic cannot handle). Rule Mont 1927 only - May 1 0:00 1:00 D Rule Mont 1927 1932 - Sep lastSun 0:00 0 S Rule Mont 1928 1931 - Apr lastSun 0:00 1:00 D Rule Mont 1932 only - May 1 0:00 1:00 D Rule Mont 1933 1940 - Apr lastSun 0:00 1:00 D Rule Mont 1933 only - Oct 1 0:00 0 S Rule Mont 1934 1939 - Sep lastSun 0:00 0 S Rule Mont 1946 1973 - Apr lastSun 2:00 1:00 D Rule Mont 1945 1948 - Sep lastSun 2:00 0 S Rule Mont 1949 1950 - Oct lastSun 2:00 0 S Rule Mont 1951 1956 - Sep lastSun 2:00 0 S Rule Mont 1957 1973 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Blanc-Sablon -3:48:28 - LMT 1884 -4:00 Canada A%sT 1970 -4:00 - AST Zone America/Montreal -4:54:16 - LMT 1884 -5:00 Mont E%sT 1918 -5:00 Canada E%sT 1919 -5:00 Mont E%sT 1942 Feb 9 2:00s -5:00 Canada E%sT 1946 -5:00 Mont E%sT 1974 -5:00 Canada E%sT # Ontario # From Paul Eggert (2006-07-09): # Shanks & Pottenger write that since 1970 most of Ontario has been like # Toronto. # Thunder Bay skipped DST in 1973. # Many smaller locales did not observe peacetime DST until 1974; # Nipigon (EST) and Rainy River (CST) are the largest that we know of. # Far west Ontario is like Winnipeg; far east Quebec is like Halifax. # From Mark Brader (2003-07-26): # [According to the Toronto Star] Orillia, Ontario, adopted DST # effective Saturday, 1912-06-22, 22:00; the article mentions that # Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw # have already done so. In Orillia DST was to run until Saturday, # 1912-08-31 (no time mentioned), but it was met with considerable # hostility from certain segments of the public, and was revoked after # only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but # presumably that should be -07-06. (1912-06-19, -07-12; also letters # earlier in June). # # Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). # From Paul Eggert (1997-10-17): # Mark Brader writes that an article in the 1997-10-14 Toronto Star # says that Atikokan, Ontario currently does not observe DST, # but will vote on 11-10 whether to use EST/EDT. # He also writes that the Ontario Time Act (1990, Chapter T.9) # # says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. # Officially Atikokan is therefore on CST/CDT, and most likely this report # concerns a non-official time observed as a matter of local practice. # # From Paul Eggert (2000-10-02): # Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and # New Osnaburgh observe CST all year, that Big Trout Lake observes # CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in # violation of the official Ontario rules. # # From Paul Eggert (2006-07-09): # Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the # 2005-07-21 Chronicle-Journal, which said: # # The clocks in Atikokan stay set on standard time year-round. # This means they spend about half the time on central time and # the other half on eastern time. # # For the most part, the system works, Mayor Dennis Brown said. # # "The majority of businesses in Atikokan deal more with Eastern # Canada, but there are some that deal with Western Canada," he # said. "I don't see any changes happening here." # # Walton also writes "Supposedly Pickle Lake and Mishkeegogamang # [New Osnaburgh] follow the same practice." # From Garry McKinnon (2006-07-14) via Chris Walton: # I chatted with a member of my board who has an outstanding memory # and a long history in Atikokan (and in the telecom industry) and he # can say for certain that Atikokan has been practicing the current # time keeping since 1952, at least. # From Paul Eggert (2006-07-17): # Shanks & Pottenger say that Atikokan has agreed with Rainy River # ever since standard time was introduced, but the information from # McKinnon sounds more authoritative. For now, assume that Atikokan # switched to EST immediately after WWII era daylight saving time # ended. This matches the old (less-populous) America/Coral_Harbour # entry since our cutoff date of 1970, so we can move # America/Coral_Harbour to the 'backward' file. # From Mark Brader (2010-03-06): # # Currently the database has: # # # Ontario # # # From Paul Eggert (2006-07-09): # # Shanks & Pottenger write that since 1970 most of Ontario has been like # # Toronto. # # Thunder Bay skipped DST in 1973. # # Many smaller locales did not observe peacetime DST until 1974; # # Nipigon (EST) and Rainy River (CST) are the largest that we know of. # # In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom # right corner of page 1, it says that Toronto will return to standard # time at 2 am Sunday morning (which agrees with the database), and that: # # The one-hour setback will go into effect throughout most of Ontario, # except in areas like Windsor which remains on standard time all year. # # Windsor is, of course, a lot larger than Nipigon. # # I only came across this incidentally. I don't know if Windsor began # observing DST when Detroit did, or in 1974, or on some other date. # # By the way, the article continues by noting that: # # Some cities in the United States have pushed the deadline back # three weeks and will change over from daylight saving in October. # From Arthur David Olson (2010-07-17): # # "Standard Time and Time Zones in Canada" appeared in # The Journal of The Royal Astronomical Society of Canada, # volume 26, number 2 (February 1932) and, as of 2010-07-17, # was available at # http://adsabs.harvard.edu/full/1932JRASC..26...49S # # It includes the text below (starting on page 57): # # A list of the places in Canada using daylight saving time would # require yearly revision. From information kindly furnished by # the provincial governments and by the postmasters in many cities # and towns, it is found that the following places used daylight sav- # ing in 1930. The information for the province of Quebec is definite, # for the other provinces only approximate: # # Province Daylight saving time used # Prince Edward Island Not used. # Nova Scotia In Halifax only. # New Brunswick In St. John only. # Quebec In the following places: # Montreal Lachine # Quebec Mont-Royal # Lévis Iberville # St. Lambert Cap de la Madelèine # Verdun Loretteville # Westmount Richmond # Outremont St. Jérôme # Longueuil Greenfield Park # Arvida Waterloo # Chambly-Canton Beaulieu # Melbourne La Tuque # St. Théophile Buckingham # Ontario Used generally in the cities and towns along # the southerly part of the province. Not # used in the northwesterly part. # Manitoba Not used. # Saskatchewan In Regina only. # Alberta Not used. # British Columbia Not used. # # With some exceptions, the use of daylight saving may be said to be limited # to those cities and towns lying between Quebec city and Windsor, Ont. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Toronto 1919 only - Mar 30 23:30 1:00 D Rule Toronto 1919 only - Oct 26 0:00 0 S Rule Toronto 1920 only - May 2 2:00 1:00 D Rule Toronto 1920 only - Sep 26 0:00 0 S Rule Toronto 1921 only - May 15 2:00 1:00 D Rule Toronto 1921 only - Sep 15 2:00 0 S Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D # Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" # was meant. Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D # The 1927-to-1939 rules can be expressed more simply as # Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S # Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D # Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D # Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S # The rules below avoid use of Sun>=25 # (which pre-2004 versions of zic cannot handle). Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D Rule Toronto 1932 only - May 1 2:00 1:00 D Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D Rule Toronto 1933 only - Oct 1 2:00 0 S Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S Rule Toronto 1949 only - Nov lastSun 0:00 0 S Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D Rule Toronto 1950 only - Nov lastSun 2:00 0 S Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S # Shanks & Pottenger say Toronto ended DST a week early in 1971, # namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this # is wrong, and that he had confirmed it by checking the 1971-10-30 # Toronto Star, which said that DST was ending 1971-10-31 as usual. Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S # From Paul Eggert (2003-07-27): # Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and # Port Arthur, Ontario, the principle of the Bill has been in # operation for the past three years, and in the City of Moose Jaw, # Saskatchewan, for one year." # From David Bryan via Tory Tronrud, Director/Curator, # Thunder Bay Museum (2003-11-12): # There is some suggestion, however, that, by-law or not, daylight # savings time was being practiced in Fort William and Port Arthur # before 1909.... [I]n 1910, the line between the Eastern and Central # Time Zones was permanently moved about two hundred miles west to # include the Thunder Bay area.... When Canada adopted daylight # savings time in 1916, Fort William and Port Arthur, having done so # already, did not change their clocks.... During the Second World # War,... [t]he cities agreed to implement DST during the summer # months for the remainder of the war years. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Toronto -5:17:32 - LMT 1895 -5:00 Canada E%sT 1919 -5:00 Toronto E%sT 1942 Feb 9 2:00s -5:00 Canada E%sT 1946 -5:00 Toronto E%sT 1974 -5:00 Canada E%sT Zone America/Thunder_Bay -5:57:00 - LMT 1895 -6:00 - CST 1910 -5:00 - EST 1942 -5:00 Canada E%sT 1970 -5:00 Toronto E%sT 1973 -5:00 - EST 1974 -5:00 Canada E%sT Zone America/Nipigon -5:53:04 - LMT 1895 -5:00 Canada E%sT 1940 Sep 29 -5:00 1:00 EDT 1942 Feb 9 2:00s -5:00 Canada E%sT Zone America/Rainy_River -6:18:16 - LMT 1895 -6:00 Canada C%sT 1940 Sep 29 -6:00 1:00 CDT 1942 Feb 9 2:00s -6:00 Canada C%sT Zone America/Atikokan -6:06:28 - LMT 1895 -6:00 Canada C%sT 1940 Sep 29 -6:00 1:00 CDT 1942 Feb 9 2:00s -6:00 Canada C%sT 1945 Sep 30 2:00 -5:00 - EST # Manitoba # From Rob Douglas (2006-04-06): # the old Manitoba Time Act - as amended by Bill 2, assented to # March 27, 1987 ... said ... # "between two o'clock Central Standard Time in the morning of # the first Sunday of April of each year and two o'clock Central # Standard Time in the morning of the last Sunday of October next # following, one hour in advance of Central Standard Time."... # I believe that the English legislation [of the old time act] had # been assented to (March 22, 1967).... # Also, as far as I can tell, there was no order-in-council varying # the time of Daylight Saving Time for 2005 and so the provisions of # the 1987 version would apply - the changeover was at 2:00 Central # Standard Time (i.e. not until 3:00 Central Daylight Time). # From Paul Eggert (2006-04-10): # Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) # starting 1966. Since 02:00s is clearly correct for 1967 on, assume # it was also 02:00s in 1966. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Winn 1916 only - Apr 23 0:00 1:00 D Rule Winn 1916 only - Sep 17 0:00 0 S Rule Winn 1918 only - Apr 14 2:00 1:00 D Rule Winn 1918 only - Oct 27 2:00 0 S Rule Winn 1937 only - May 16 2:00 1:00 D Rule Winn 1937 only - Sep 26 2:00 0 S Rule Winn 1942 only - Feb 9 2:00 1:00 W # War Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace Rule Winn 1945 only - Sep lastSun 2:00 0 S Rule Winn 1946 only - May 12 2:00 1:00 D Rule Winn 1946 only - Oct 13 2:00 0 S Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D Rule Winn 1947 1949 - Sep lastSun 2:00 0 S Rule Winn 1950 only - May 1 2:00 1:00 D Rule Winn 1950 only - Sep 30 2:00 0 S Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D Rule Winn 1951 1958 - Sep lastSun 2:00 0 S Rule Winn 1959 only - Oct lastSun 2:00 0 S Rule Winn 1960 only - Sep lastSun 2:00 0 S Rule Winn 1963 only - Apr lastSun 2:00 1:00 D Rule Winn 1963 only - Sep 22 2:00 0 S Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 -6:00 Winn C%sT 2006 -6:00 Canada C%sT # Saskatchewan # From Mark Brader (2003-07-26): # The first actual adoption of DST in Canada was at the municipal # level. As the [Toronto] Star put it (1912-06-07), "While people # elsewhere have long been talking of legislation to save daylight, # the city of Moose Jaw [Saskatchewan] has acted on its own hook." # DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: # presumably late evening, as below), and would run until "the end of # the summer". The discrepancy between municipal time and railroad # time was noted. # From Paul Eggert (2003-07-27): # Willett (1914-03) notes that DST "has been in operation ... in the # City of Moose Jaw, Saskatchewan, for one year." # From Paul Eggert (2006-03-22): # Shanks & Pottenger say that since 1970 this region has mostly been as Regina. # Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. # Other western towns (e.g. Lloydminster) are like Edmonton. # Matthews and Vincent (1998) write that Denare Beach and Creighton # are like Winnipeg, in violation of Saskatchewan law. # From W. Jones (1992-11-06): # The. . .below is based on information I got from our law library, the # provincial archives, and the provincial Community Services department. # A precise history would require digging through newspaper archives, and # since you didn't say what you wanted, I didn't bother. # # Saskatchewan is split by a time zone meridian (105W) and over the years # the boundary became pretty ragged as communities near it reevaluated # their affiliations in one direction or the other. In 1965 a provincial # referendum favoured legislating common time practices. # # On 15 April 1966 the Time Act (c. T-14, Revised Statutes of # Saskatchewan 1978) was proclaimed, and established that the eastern # part of Saskatchewan would use CST year round, that districts in # northwest Saskatchewan would by default follow CST but could opt to # follow Mountain Time rules (thus 1 hour difference in the winter and # zero in the summer), and that districts in southwest Saskatchewan would # by default follow MT but could opt to follow CST. # # It took a few years for the dust to settle (I know one story of a town # on one time zone having its school in another, such that a mom had to # serve her family lunch in two shifts), but presently it seems that only # a few towns on the border with Alberta (e.g. Lloydminster) follow MT # rules any more; all other districts appear to have used CST year round # since sometime in the 1960s. # From Chris Walton (2006-06-26): # The Saskatchewan time act which was last updated in 1996 is about 30 pages # long and rather painful to read. # http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Regina 1918 only - Apr 14 2:00 1:00 D Rule Regina 1918 only - Oct 27 2:00 0 S Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D Rule Regina 1937 only - Oct Sun>=8 0:00 0 S Rule Regina 1938 only - Oct Sun>=1 0:00 0 S Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S Rule Regina 1942 only - Feb 9 2:00 1:00 W # War Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace Rule Regina 1945 only - Sep lastSun 2:00 0 S Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D Rule Regina 1946 only - Oct Sun>=8 2:00 0 S Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D Rule Regina 1947 1957 - Sep lastSun 2:00 0 S Rule Regina 1959 only - Apr lastSun 2:00 1:00 D Rule Regina 1959 only - Oct lastSun 2:00 0 S # Rule Swift 1957 only - Apr lastSun 2:00 1:00 D Rule Swift 1957 only - Oct lastSun 2:00 0 S Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D Rule Swift 1959 only - Oct lastSun 2:00 0 S Rule Swift 1960 1961 - Sep lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Regina -6:58:36 - LMT 1905 Sep -7:00 Regina M%sT 1960 Apr lastSun 2:00 -6:00 - CST Zone America/Swift_Current -7:11:20 - LMT 1905 Sep -7:00 Canada M%sT 1946 Apr lastSun 2:00 -7:00 Regina M%sT 1950 -7:00 Swift M%sT 1972 Apr lastSun 2:00 -6:00 - CST # Alberta # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D Rule Edm 1918 only - Oct 27 2:00 0 S Rule Edm 1919 only - May 27 2:00 0 S Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D Rule Edm 1920 only - Oct lastSun 2:00 0 S Rule Edm 1921 1923 - Sep lastSun 2:00 0 S Rule Edm 1942 only - Feb 9 2:00 1:00 W # War Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace Rule Edm 1945 only - Sep lastSun 2:00 0 S Rule Edm 1947 only - Apr lastSun 2:00 1:00 D Rule Edm 1947 only - Sep lastSun 2:00 0 S Rule Edm 1967 only - Apr lastSun 2:00 1:00 D Rule Edm 1967 only - Oct lastSun 2:00 0 S Rule Edm 1969 only - Apr lastSun 2:00 1:00 D Rule Edm 1969 only - Oct lastSun 2:00 0 S Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D Rule Edm 1972 2006 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Edmonton -7:33:52 - LMT 1906 Sep -7:00 Edm M%sT 1987 -7:00 Canada M%sT # British Columbia # From Paul Eggert (2006-03-22): # Shanks & Pottenger write that since 1970 most of this region has # been like Vancouver. # Dawson Creek uses MST. Much of east BC is like Edmonton. # Matthews and Vincent (1998) write that Creston is like Dawson Creek. # It seems though that (re: Creston) is not entirely correct: # From Chris Walton (2011-12-01): # There are two areas within the Canadian province of British Columbia # that do not currently observe daylight saving: # a) The Creston Valley (includes the town of Creston and surrounding area) # b) The eastern half of the Peace River Regional District # (includes the cities of Dawson Creek and Fort St. John) # Earlier this year I stumbled across a detailed article about the time # keeping history of Creston; it was written by Tammy Hardwick who is the # manager of the Creston & District Museum. The article was written in May 2009. # http://www.ilovecreston.com/?p=articles&t=spec&ar=260 # According to the article, Creston has not changed its clocks since June 1918. # i.e. Creston has been stuck on UTC-7 for 93 years. # Dawson Creek, on the other hand, changed its clocks as recently as April 1972. # Unfortunately the exact date for the time change in June 1918 remains # unknown and will be difficult to ascertain. I e-mailed Tammy a few months # ago to ask if Sunday June 2 was a reasonable guess. She said it was just # as plausible as any other date (in June). She also said that after writing the # article she had discovered another time change in 1916; this is the subject # of another article which she wrote in October 2010. # http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56 # Here is a summary of the three clock change events in Creston's history: # 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7) # Exact date unknown # 2. Oct 1916: switch to Pacific Standard Time (GMT-8) # Exact date in October unknown; Sunday October 1 is a reasonable guess. # 3. June 1918: switch to Pacific Daylight Time (GMT-7) # Exact date in June unknown; Sunday June 2 is a reasonable guess. # note#1: # On Oct 27/1918 when daylight saving ended in the rest of Canada, # Creston did not change its clocks. # note#2: # During WWII when the Federal Government legislated a mandatory clock change, # Creston did not oblige. # note#3: # There is no guarantee that Creston will remain on Mountain Standard Time # (UTC-7) forever. # The subject was debated at least once this year by the town Council. # http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html # During a period WWII, summer time (Daylight saying) was mandatory in Canada. # In Creston, that was handled by shifting the area to PST (-8:00) then applying # summer time to cause the offset to be -7:00, the same as it had been before # the change. It can be argued that the timezone abbreviation during this # period should be PDT rather than MST, but that doesn't seem important enough # (to anyone) to further complicate the rules. # The transition dates (and times) are guesses. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Vanc 1918 only - Apr 14 2:00 1:00 D Rule Vanc 1918 only - Oct 27 2:00 0 S Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace Rule Vanc 1945 only - Sep 30 2:00 0 S Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D Rule Vanc 1946 only - Oct 13 2:00 0 S Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Vancouver -8:12:28 - LMT 1884 -8:00 Vanc P%sT 1987 -8:00 Canada P%sT Zone America/Dawson_Creek -8:00:56 - LMT 1884 -8:00 Canada P%sT 1947 -8:00 Vanc P%sT 1972 Aug 30 2:00 -7:00 - MST Zone America/Creston -7:46:04 - LMT 1884 -7:00 - MST 1916 Oct 1 -8:00 - PST 1918 Jun 2 -7:00 - MST # Northwest Territories, Nunavut, Yukon # From Paul Eggert (2006-03-22): # Dawson switched to PST in 1973. Inuvik switched to MST in 1979. # Mathew Englander (1996-10-07) gives the following refs: # * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, # c. 7 defines Yukon standard time as UTC-9. This is still valid; # see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). # * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. # * O.I.C. 1980/02 established DST. # * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. # Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go # with Englander. # From Chris Walton (2006-06-26): # Here is a link to the old daylight saving portion of the interpretation # act which was last updated in 1987: # http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf # From Rives McDow (1999-09-04): # Nunavut ... moved ... to incorporate the whole territory into one time zone. # Nunavut moves to single time zone Oct. 31 # # # From Antoine Leca (1999-09-06): # We then need to create a new timezone for the Kitikmeot region of Nunavut # to differentiate it from the Yellowknife region. # From Paul Eggert (1999-09-20): # Basic Facts: The New Territory # # (1999) reports that Pangnirtung operates on eastern time, # and that Coral Harbour does not observe DST. We don't know when # Pangnirtung switched to eastern time; we'll guess 1995. # From Rives McDow (1999-11-08): # On October 31, when the rest of Nunavut went to Central time, # Pangnirtung wobbled. Here is the result of their wobble: # # The following businesses and organizations in Pangnirtung use Central Time: # # First Air, Power Corp, Nunavut Construction, Health Center, RCMP, # Eastern Arctic National Parks, A & D Specialist # # The following businesses and organizations in Pangnirtung use Eastern Time: # # Hamlet office, All other businesses, Both schools, Airport operator # # This has made for an interesting situation there, which warranted the news. # No one there that I spoke with seems concerned, or has plans to # change the local methods of keeping time, as it evidently does not # really interfere with any activities or make things difficult locally. # They plan to celebrate New Year's turn-over twice, one hour apart, # so it appears that the situation will last at least that long. # The Nunavut Intergovernmental Affairs hopes that they will "come to # their senses", but the locals evidently don't see any problem with # the current state of affairs. # From Michaela Rodrigue, writing in the # Nunatsiaq News (1999-11-19) # : # Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, # central - or Nunavut time - for government offices, and eastern time # for municipal offices and schools.... Igloolik [was similar but then] # made the switch to central time on Saturday, Nov. 6. # From Paul Eggert (2000-10-02): # Matthews and Vincent (1998) say the following, but we lack histories # for these potential new Zones. # # The Canadian Forces station at Alert uses Eastern Time while the # handful of residents at the Eureka weather station [in the Central # zone] skip daylight savings. Baffin Island, which is crossed by the # Central, Eastern and Atlantic Time zones only uses Eastern Time. # Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of # Central Time and Southampton Island [in the Central zone] is not # required to use daylight savings. # From # Nunavut now has two time zones (2000-11-10): # The Nunavut government would allow its employees in Kugluktuk and # Cambridge Bay to operate on central time year-round, putting them # one hour behind the rest of Nunavut for six months during the winter. # At the end of October the two communities had rebelled against # Nunavut's unified time zone, refusing to shift to eastern time with # the rest of the territory for the winter. Cambridge Bay remained on # central time, while Kugluktuk, even farther west, reverted to # mountain time, which they had used before the advent of Nunavut's # unified time zone in 1999. # # From Rives McDow (2001-01-20), quoting the Nunavut government: # The preceding decision came into effect at midnight, Saturday Nov 4, 2000. # From Paul Eggert (2000-12-04): # Let's just keep track of the official times for now. # From Rives McDow (2001-03-07): # The premier of Nunavut has issued a ministerial statement advising # that effective 2001-04-01, the territory of Nunavut will revert # back to three time zones (mountain, central, and eastern). Of the # cities in Nunavut, Coral Harbor is the only one that I know of that # has said it will not observe dst, staying on EST year round. I'm # checking for more info, and will get back to you if I come up with # more. # [Also see (2001-03-09).] # From Gwillim Law (2005-05-21): # According to maps at # http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg # http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg # (both dated 2003), and # http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp # (from a 1998 Canadian Geographic article), the de facto and de jure time # for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year # round. Using Google, it's easy to find other websites that confirm this. # I wasn't able to find how far back this time regimen goes, but since it # predates the creation of Nunavut, it probably goes back many years.... # The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. # # From Paul Eggert (2005-07-26): # For lack of better information, assume that Southampton Island observed # daylight saving only during wartime. # From Chris Walton (2007-03-01): # ... the community of Resolute (located on Cornwallis Island in # Nunavut) moved from Central Time to Eastern Time last November. # Basically the community did not change its clocks at the end of # daylight saving.... # http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html # From Chris Walton (2011-03-21): # Back in 2007 I initiated the creation of a new "zone file" for Resolute # Bay. Resolute Bay is a small community located about 900km north of # the Arctic Circle. The zone file was required because Resolute Bay had # decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007. # # According to new information which I received last week, Resolute Bay # went back to using UTC-6 in the winter of 2007-2008... # # On March 11/2007 most of Canada went onto daylight saving. On March # 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I # talked to somebody that was both knowledgeable and helpful. I was able # to confirm that Resolute Bay was still operating on UTC-5. It was # explained to me that Resolute Bay had been on the Eastern Time zone # (EST) in the winter, and was now back on the Central Time zone (CDT). # i.e. the time zone had changed twice in the last year but the clocks # had not moved. The residents had to know which time zone they were in # so they could follow the correct TV schedule... # # On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I # phoned the Resolute Bay hamlet office...[D]ue to the challenging nature # of the phone call, I decided to seek out an alternate source of # information. I found an e-mail address for somebody by the name of # Stephanie Adams whose job was listed as "Inns North Support Officer for # Arctic Co-operatives." I was under the impression that Stephanie lived # and worked in Resolute Bay... # # On March 14/2011 I phoned the hamlet office again. I was told that # Resolute Bay had been using Central Standard Time over the winter of # 2010-2011 and that the clocks had therefore been moved one hour ahead # on March 13/2011. The person I talked to was aware that Resolute Bay # had previously experimented with Eastern Standard Time but he could not # tell me when the practice had stopped. # # On March 17/2011 I searched the Web to find an e-mail address of # somebody that might be able to tell me exactly when Resolute Bay went # off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz # used to be the mayor of Resolute Bay and he apparently owns half the # businesses including "South Camp Inn." This website has some info on # Aziz: # http://www.uphere.ca/node/493 # # I sent Aziz an e-mail asking when Resolute Bay had stopped using # Eastern Standard Time. # # Aziz responded quickly with this: "hi, The time was not changed for the # 1 year only, the following year, the community went back to the old way # of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in # the winter Zulu plus 6 hrs" # # This of course conflicted with everything I had ascertained in November 2008. # # I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz # responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You # may want to check with the weather office in Resolute Bay or do a # search on the weather through Env. Canada. web site" # # If I had realized the Stephanie did not live in Resolute Bay I would # never have contacted her. I now believe that all the information I # obtained in November 2008 should be ignored... # I apologize for reporting incorrect information in 2008. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule NT_YK 1918 only - Apr 14 2:00 1:00 D Rule NT_YK 1918 only - Oct 27 2:00 0 S Rule NT_YK 1919 only - May 25 2:00 1:00 D Rule NT_YK 1919 only - Nov 1 0:00 0 S Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace Rule NT_YK 1945 only - Sep 30 2:00 0 S Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD Rule NT_YK 1965 only - Oct lastSun 2:00 0 S Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D # Zone NAME GMTOFF RULES FORMAT [UNTIL] # aka Panniqtuuq Zone America/Pangnirtung 0 - zzz 1921 # trading post est. -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 -5:00 Canada E%sT 1999 Oct 31 2:00 -6:00 Canada C%sT 2000 Oct 29 2:00 -5:00 Canada E%sT # formerly Frobisher Bay Zone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est. -5:00 NT_YK E%sT 1999 Oct 31 2:00 -6:00 Canada C%sT 2000 Oct 29 2:00 -5:00 Canada E%sT # aka Qausuittuq Zone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded -6:00 NT_YK C%sT 2000 Oct 29 2:00 -5:00 - EST 2001 Apr 1 3:00 -6:00 Canada C%sT 2006 Oct 29 2:00 -5:00 - EST 2007 Mar 11 3:00 -6:00 Canada C%sT # aka Kangiqiniq Zone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded -6:00 NT_YK C%sT 2000 Oct 29 2:00 -5:00 - EST 2001 Apr 1 3:00 -6:00 Canada C%sT # aka Iqaluktuuttiaq Zone America/Cambridge_Bay 0 - zzz 1920 # trading post est.? -7:00 NT_YK M%sT 1999 Oct 31 2:00 -6:00 Canada C%sT 2000 Oct 29 2:00 -5:00 - EST 2000 Nov 5 0:00 -6:00 - CST 2001 Apr 1 3:00 -7:00 Canada M%sT Zone America/Yellowknife 0 - zzz 1935 # Yellowknife founded? -7:00 NT_YK M%sT 1980 -7:00 Canada M%sT Zone America/Inuvik 0 - zzz 1953 # Inuvik founded -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 -7:00 NT_YK M%sT 1980 -7:00 Canada M%sT Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 -9:00 NT_YK Y%sT 1966 Jul 1 2:00 -8:00 NT_YK P%sT 1980 -8:00 Canada P%sT Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 -9:00 NT_YK Y%sT 1973 Oct 28 0:00 -8:00 NT_YK P%sT 1980 -8:00 Canada P%sT ############################################################################### # Mexico # From Paul Eggert (2001-03-05): # The Investigation and Analysis Service of the # Mexican Library of Congress (MLoC) has published a # history of Mexican local time (in Spanish) # . # # Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. # (In all cases we go with the MLoC.) # S&P report that Baja was at -8:00 in 1922/1923. # S&P say the 1930 transition in Baja was 1930-11-16. # S&P report no DST during summer 1931. # S&P report a transition at 1932-03-30 23:00, not 1932-04-01. # From Gwillim Law (2001-02-20): # There are some other discrepancies between the Decrees page and the # tz database. I think they can best be explained by supposing that # the researchers who prepared the Decrees page failed to find some of # the relevant documents. # From Alan Perry (1996-02-15): # A guy from our Mexico subsidiary finally found the Presidential Decree # outlining the timezone changes in Mexico. # # ------------- Begin Forwarded Message ------------- # # I finally got my hands on the Official Presidential Decree that sets up the # rules for the DST changes. The rules are: # # 1. The country is divided in 3 timezones: # - Baja California Norte (the Mexico/BajaNorte TZ) # - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) # - The rest of the country (the Mexico/General TZ) # # 2. From the first Sunday in April at 2:00 AM to the last Sunday in October # at 2:00 AM, the times in each zone are as follows: # BajaNorte: GMT+7 # BajaSur: GMT+6 # General: GMT+5 # # 3. The rest of the year, the times are as follows: # BajaNorte: GMT+8 # BajaSur: GMT+7 # General: GMT+6 # # The Decree was published in Mexico's Official Newspaper on January 4th. # # -------------- End Forwarded Message -------------- # From Paul Eggert (1996-06-12): # For an English translation of the decree, see # "Diario Oficial: Time Zone Changeover" (1996-01-04) # . # From Rives McDow (1998-10-08): # The State of Quintana Roo has reverted back to central STD and DST times # (i.e. UTC -0600 and -0500 as of 1998-08-02). # From Rives McDow (2000-01-10): # Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time # zone 5 hours from the International Date Line, and will not observe daylight # savings time so as to stay on the same time zone as the southern part of # Arizona year round. # From Jesper Nørgaard, translating # (2001-01-17): # In Oaxaca, the 55.000 teachers from the Section 22 of the National # Syndicate of Education Workers, refuse to apply daylight saving each # year, so that the more than 10,000 schools work at normal hour the # whole year. # From Gwillim Law (2001-01-19): # ... says # (translated):... # January 17, 2000 - The Energy Secretary, Ernesto Martens, announced # that Summer Time will be reduced from seven to five months, starting # this year.... # # [translated], says "summer time will ... take effect on the first Sunday # in May, and end on the last Sunday of September. # From Arthur David Olson (2001-01-25): # The 2001-01-24 traditional Washington Post contained the page one # story "Timely Issue Divides Mexicans."... # http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html # ... Mexico City Mayor López Obrador "...is threatening to keep # Mexico City and its 20 million residents on a different time than # the rest of the country..." In particular, López Obrador would abolish # observation of Daylight Saving Time. # Official statute published by the Energy Department # # (2001-02-01) shows Baja and Chihauhua as still using US DST rules, # and Sonora with no DST. This was reported by Jesper Nørgaard (2001-02-03). # From Paul Eggert (2001-03-03): # # # James F. Smith writes in today's LA Times # * Sonora will continue to observe standard time. # * Last week Mexico City's mayor Andrés Manuel López Obrador decreed that # the Federal District will not adopt DST. # * 4 of 16 district leaders announced they'll ignore the decree. # * The decree does not affect federal-controlled facilities including # the airport, banks, hospitals, and schools. # # For now we'll assume that the Federal District will bow to federal rules. # From Jesper Nørgaard (2001-04-01): # I found some references to the Mexican application of daylight # saving, which modifies what I had already sent you, stating earlier # that a number of northern Mexican states would go on daylight # saving. The modification reverts this to only cover Baja California # (Norte), while all other states (except Sonora, who has no daylight # saving all year) will follow the original decree of president # Vicente Fox, starting daylight saving May 6, 2001 and ending # September 30, 2001. # References: "Diario de Monterrey" # Palabra (2001-03-31) # From Reuters (2001-09-04): # Mexico's Supreme Court on Tuesday declared that daylight savings was # unconstitutional in Mexico City, creating the possibility the # capital will be in a different time zone from the rest of the nation # next year.... The Supreme Court's ruling takes effect at 2:00 # a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to # standard time. "This is so residents of the Federal District are not # subject to unexpected time changes," a statement from the court said. # From Jesper Nørgaard Welen (2002-03-12): # ... consulting my local grocery store(!) and my coworkers, they all insisted # that a new decision had been made to reinstate US style DST in Mexico.... # http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) # confirms this. Sonora as usual is the only state where DST is not applied. # From Steffen Thorsen (2009-12-28): # # Steffen Thorsen wrote: # > Mexico's House of Representatives has approved a proposal for northern # > Mexico's border cities to share the same daylight saving schedule as # > the United States. # Now this has passed both the Congress and the Senate, so starting from # 2010, some border regions will be the same: # http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ # http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 # (Spanish) # # Could not find the new law text, but the proposed law text changes are here: # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf # (Gaceta Parlamentaria) # # There is also a list of the votes here: # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html # # Our page: # http://www.timeanddate.com/news/time/north-mexico-dst-change.html # From Arthur David Olson (2010-01-20): # The page # http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 # includes this text: # En los municipios fronterizos de Tijuana y Mexicali en Baja California; # Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila; # Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en # Tamaulipas, la aplicación de este horario estacional surtirá efecto # desde las dos horas del segundo domingo de marzo y concluirá a las dos # horas del primer domingo de noviembre. # En los municipios fronterizos que se encuentren ubicados en la franja # fronteriza norte en el territorio comprendido entre la línea # internacional y la línea paralela ubicada a una distancia de veinte # kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el # interior del país, la aplicación de este horario estacional surtirá # efecto desde las dos horas del segundo domingo de marzo y concluirá a # las dos horas del primer domingo de noviembre. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Mexico 1939 only - Feb 5 0:00 1:00 D Rule Mexico 1939 only - Jun 25 0:00 0 S Rule Mexico 1940 only - Dec 9 0:00 1:00 D Rule Mexico 1941 only - Apr 1 0:00 0 S Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War Rule Mexico 1944 only - May 1 0:00 0 S Rule Mexico 1950 only - Feb 12 0:00 1:00 D Rule Mexico 1950 only - Jul 30 0:00 0 S Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D Rule Mexico 2001 only - Sep lastSun 2:00 0 S Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D Rule Mexico 2002 max - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] # Quintana Roo; represented by Cancún Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 -6:00 - CST 1981 Dec 23 -5:00 Mexico E%sT 1998 Aug 2 2:00 -6:00 Mexico C%sT # Campeche, Yucatán; represented by Mérida Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 -6:00 - CST 1981 Dec 23 -5:00 - EST 1982 Dec 2 -6:00 Mexico C%sT # Coahuila, Durango, Nuevo León, Tamaulipas (near US border) Zone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 -6:00 - CST 1988 -6:00 US C%sT 1989 -6:00 Mexico C%sT 2010 -6:00 US C%sT # Coahuila, Durango, Nuevo León, Tamaulipas (away from US border) Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 -6:00 - CST 1988 -6:00 US C%sT 1989 -6:00 Mexico C%sT # Central Mexico Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 -7:00 - MST 1927 Jun 10 23:00 -6:00 - CST 1930 Nov 15 -7:00 - MST 1931 May 1 23:00 -6:00 - CST 1931 Oct -7:00 - MST 1932 Apr 1 -6:00 Mexico C%sT 2001 Sep 30 02:00 -6:00 - CST 2002 Feb 20 -6:00 Mexico C%sT # Chihuahua (near US border) Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 -7:00 - MST 1927 Jun 10 23:00 -6:00 - CST 1930 Nov 15 -7:00 - MST 1931 May 1 23:00 -6:00 - CST 1931 Oct -7:00 - MST 1932 Apr 1 -6:00 - CST 1996 -6:00 Mexico C%sT 1998 -6:00 - CST 1998 Apr Sun>=1 3:00 -7:00 Mexico M%sT 2010 -7:00 US M%sT # Chihuahua (away from US border) Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 -7:00 - MST 1927 Jun 10 23:00 -6:00 - CST 1930 Nov 15 -7:00 - MST 1931 May 1 23:00 -6:00 - CST 1931 Oct -7:00 - MST 1932 Apr 1 -6:00 - CST 1996 -6:00 Mexico C%sT 1998 -6:00 - CST 1998 Apr Sun>=1 3:00 -7:00 Mexico M%sT # Sonora Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 -7:00 - MST 1927 Jun 10 23:00 -6:00 - CST 1930 Nov 15 -7:00 - MST 1931 May 1 23:00 -6:00 - CST 1931 Oct -7:00 - MST 1932 Apr 1 -6:00 - CST 1942 Apr 24 -7:00 - MST 1949 Jan 14 -8:00 - PST 1970 -7:00 Mexico M%sT 1999 -7:00 - MST # From Alexander Krivenyshev (2010-04-21): # According to news, Bahía de Banderas (Mexican state of Nayarit) # changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to # share the same time zone as nearby city Puerto Vallarta, Jalisco). # # (Spanish) # Bahía de Banderas homologa su horario al del centro del # país, a partir de este domingo # http://www.nayarit.gob.mx/notes.asp?id=20748 # # Bahía de Banderas homologa su horario con el del Centro del # País # http://www.bahiadebanderas.gob.mx/principal/index.php?option=com_content&view=article&id=261:bahia-de-banderas-homologa-su-horario-con-el-del-centro-del-pais&catid=42:comunicacion-social&Itemid=50 # # (English) # Puerto Vallarta and Bahía de Banderas: One Time Zone # http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml # http://www.worldtimezone.com/dst_news/dst_news_mexico08.html # # "Mexico's Senate approved the amendments to the Mexican Schedule System that # will allow Bahía de Banderas and Puerto Vallarta to share the same time # zone ..." # Baja California Sur, Nayarit, Sinaloa # From Arthur David Olson (2010-05-01): # Use "Bahia_Banderas" to keep the name to fourteen characters. # Mazatlán Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 -7:00 - MST 1927 Jun 10 23:00 -6:00 - CST 1930 Nov 15 -7:00 - MST 1931 May 1 23:00 -6:00 - CST 1931 Oct -7:00 - MST 1932 Apr 1 -6:00 - CST 1942 Apr 24 -7:00 - MST 1949 Jan 14 -8:00 - PST 1970 -7:00 Mexico M%sT # Bahía de Banderas Zone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00 -7:00 - MST 1927 Jun 10 23:00 -6:00 - CST 1930 Nov 15 -7:00 - MST 1931 May 1 23:00 -6:00 - CST 1931 Oct -7:00 - MST 1932 Apr 1 -6:00 - CST 1942 Apr 24 -7:00 - MST 1949 Jan 14 -8:00 - PST 1970 -7:00 Mexico M%sT 2010 Apr 4 2:00 -6:00 Mexico C%sT # Baja California (near US border) Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 -7:00 - MST 1924 -8:00 - PST 1927 Jun 10 23:00 -7:00 - MST 1930 Nov 15 -8:00 - PST 1931 Apr 1 -8:00 1:00 PDT 1931 Sep 30 -8:00 - PST 1942 Apr 24 -8:00 1:00 PWT 1945 Aug 14 23:00u -8:00 1:00 PPT 1945 Nov 12 # Peace -8:00 - PST 1948 Apr 5 -8:00 1:00 PDT 1949 Jan 14 -8:00 - PST 1954 -8:00 CA P%sT 1961 -8:00 - PST 1976 -8:00 US P%sT 1996 -8:00 Mexico P%sT 2001 -8:00 US P%sT 2002 Feb 20 -8:00 Mexico P%sT 2010 -8:00 US P%sT # Baja California (away from US border) Zone America/Santa_Isabel -7:39:28 - LMT 1922 Jan 1 0:20:32 -7:00 - MST 1924 -8:00 - PST 1927 Jun 10 23:00 -7:00 - MST 1930 Nov 15 -8:00 - PST 1931 Apr 1 -8:00 1:00 PDT 1931 Sep 30 -8:00 - PST 1942 Apr 24 -8:00 1:00 PWT 1945 Aug 14 23:00u -8:00 1:00 PPT 1945 Nov 12 # Peace -8:00 - PST 1948 Apr 5 -8:00 1:00 PDT 1949 Jan 14 -8:00 - PST 1954 -8:00 CA P%sT 1961 -8:00 - PST 1976 -8:00 US P%sT 1996 -8:00 Mexico P%sT 2001 -8:00 US P%sT 2002 Feb 20 -8:00 Mexico P%sT # From Paul Eggert (2006-03-22): # Formerly there was an America/Ensenada zone, which differed from # America/Tijuana only in that it did not observe DST from 1976 # through 1995. This was as per Shanks (1999). But Shanks & Pottenger say # Ensenada did not observe DST from 1948 through 1975. Guy Harris reports # that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and # Tijuana observe DST," which agrees with Shanks & Pottenger but implies that # DST-observance was a town-by-town matter back then. This concerns # data after 1970 so most likely there should be at least one Zone # other than America/Tijuana for Baja, but it's not clear yet what its # name or contents should be. # # Revillagigedo Is # no information ############################################################################### # Anguilla # See America/Port_of_Spain. # Antigua and Barbuda # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Antigua -4:07:12 - LMT 1912 Mar 2 -5:00 - EST 1951 -4:00 - AST # Bahamas # # For 1899 Milne gives -5:09:29.5; round that. # # From Sue Williams (2006-12-07): # The Bahamas announced about a month ago that they plan to change their DST # rules to sync with the U.S. starting in 2007.... # http://www.jonesbahamas.com/?c=45&a=10412 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Nassau -5:09:30 - LMT 1912 Mar 2 -5:00 Bahamas E%sT 1976 -5:00 US E%sT # Barbados # For 1899 Milne gives -3:58:29.2; round that. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Barb 1977 only - Jun 12 2:00 1:00 D Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D Rule Barb 1979 only - Sep 30 2:00 0 S Rule Barb 1980 only - Sep 25 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Barbados -3:58:29 - LMT 1924 # Bridgetown -3:58:29 - BMT 1932 # Bridgetown Mean Time -4:00 Barb A%sT # Belize # Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S Rule Belize 1973 only - Dec 5 0:00 1:00 D Rule Belize 1974 only - Feb 9 0:00 0 S Rule Belize 1982 only - Dec 18 0:00 1:00 D Rule Belize 1983 only - Feb 12 0:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Belize -5:52:48 - LMT 1912 Apr -6:00 Belize C%sT # Bermuda # For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower, # Bermuda dockyard, Ireland I; round that. # From Dan Jones, reporting in The Royal Gazette (2006-06-26): # Next year, however, clocks in the US will go forward on the second Sunday # in March, until the first Sunday in November. And, after the Time Zone # (Seasonal Variation) Bill 2006 was passed in the House of Assembly on # Friday, the same thing will happen in Bermuda. # http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton -4:00 - AST 1974 Apr 28 2:00 -4:00 Canada A%sT 1976 -4:00 US A%sT # Cayman Is # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown -5:07:11 - KMT 1912 Feb # Kingston Mean Time -5:00 - EST # Costa Rica # Milne gives -5:36:13.3 as San José mean time; round to nearest. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D # IATA SSIM (1991-09) says the following was at 1:00; # go with Shanks & Pottenger. Rule CR 1991 only - Jul 1 0:00 0 S Rule CR 1992 only - Mar 15 0:00 0 S # There are too many San Josés elsewhere, so we'll use 'Costa Rica'. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Costa_Rica -5:36:13 - LMT 1890 # San José -5:36:13 - SJMT 1921 Jan 15 # San José Mean Time -6:00 CR C%sT # Coco # no information; probably like America/Costa_Rica # Cuba # From Paul Eggert (2013-02-21): # Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57 # for the port, and -5:30 for meteorological observations. # For now, stick with Shanks & Pottenger. # From Arthur David Olson (1999-03-29): # The 1999-03-28 exhibition baseball game held in Havana, Cuba, between # the Cuban National Team and the Baltimore Orioles was carried live on # the Orioles Radio Network, including affiliate WTOP in Washington, DC. # During the game, play-by-play announcer Jim Hunter noted that # "We'll be losing two hours of sleep...Cuba switched to Daylight Saving # Time today." (The "two hour" remark referred to losing one hour of # sleep on 1999-03-28 - when the announcers were in Cuba as it switched # to DST - and one more hour on 1999-04-04 - when the announcers will have # returned to Baltimore, which switches on that date.) # From Steffen Thorsen (2013-11-11): # DST start in Cuba in 2004 ... does not follow the same rules as the # years before. The correct date should be Sunday 2004-03-28 00:00 ... # https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html # From Evert van der Veer via Steffen Thorsen (2004-10-28): # Cuba is not going back to standard time this year. # From Paul Eggert (2006-03-22): # http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html # says that it's due to a problem at the Antonio Guiteras # thermoelectric plant, and says "This October there will be no return # to normal hours (after daylight saving time)". # For now, let's assume that it's a temporary measure. # From Carlos A. Carnero Delgado (2005-11-12): # This year (just like in 2004-2005) there's no change in time zone # adjustment in Cuba. We will stay in daylight saving time: # http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html # From Jesper Nørgaard Welen (2006-10-21): # An article in GRANMA INTERNACIONAL claims that Cuba will end # the 3 years of permanent DST next weekend, see # http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html # "On Saturday night, October 28 going into Sunday, October 29, at 01:00, # watches should be set back one hour - going back to 00:00 hours - returning # to the normal schedule.... # From Paul Eggert (2007-03-02): # , dated yesterday, # says Cuban clocks will advance at midnight on March 10. # For lack of better information, assume Cuba will use US rules, # except that it switches at midnight standard time as usual. # # From Steffen Thorsen (2007-10-25): # Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week # earlier - on the last Sunday of October, just like in 2006. # # He supplied these references: # # http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES # http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm # # From Alex Krivenyshev (2007-10-25): # Here is also article from Granma (Cuba): # # Regirá el Horario Normal desde el próximo domingo 28 de octubre # http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html # # http://www.worldtimezone.com/dst_news/dst_news_cuba03.html # From Arthur David Olson (2008-03-09): # I'm in Maryland which is now observing United States Eastern Daylight # Time. At 9:44 local time I used RealPlayer to listen to # http://media.enet.cu/radioreloj # a Cuban information station, and heard # the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), # indicating that Cuba is still on standard time. # From Steffen Thorsen (2008-03-12): # It seems that Cuba will start DST on Sunday, 2007-03-16... # It was announced yesterday, according to this source (in Spanish): # http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm # # Some more background information is posted here: # http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html # # The article also says that Cuba has been observing DST since 1963, # while Shanks (and tzdata) has 1965 as the first date (except in the # 1940's). Many other web pages in Cuba also claim that it has been # observed since 1963, but with the exception of 1970 - an exception # which is not present in tzdata/Shanks. So there is a chance we need to # change some historic records as well. # # One example: # http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm # From Jesper Nørgaard Welen (2008-03-13): # The Cuban time change has just been confirmed on the most authoritative # web site, the Granma. Please check out # http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html # # Basically as expected after Steffen Thorsen's information, the change # will take place midnight between Saturday and Sunday. # From Arthur David Olson (2008-03-12): # Assume Sun>=15 (third Sunday) going forward. # From Alexander Krivenyshev (2009-03-04) # According to the Radio Reloj - Cuba will start Daylight Saving Time on # midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- # not on midnight March 14 / March 15 as previously thought. # # http://www.worldtimezone.com/dst_news/dst_news_cuba05.html # (in Spanish) # From Arthur David Olson (2009-03-09) # I listened over the Internet to # http://media.enet.cu/readioreloj # this morning; when it was 10:05 a. m. here in Bethesda, Maryland the # the time was announced as "diez cinco" - the same time as here, indicating # that has indeed switched to DST. Assume second Sunday from 2009 forward. # From Steffen Thorsen (2011-03-08): # Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00 # this year. Nothing about the end date known so far (if that has # changed at all). # # Source: # http://granma.co.cu/2011/03/08/nacional/artic01.html # # Our info: # http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html # # From Steffen Thorsen (2011-10-30) # Cuba will end DST two weeks later this year. Instead of going back # tonight, it has been delayed to 2011-11-13 at 01:00. # # One source (Spanish) # http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html # # Our page: # http://www.timeanddate.com/news/time/cuba-time-changes-2011.html # # From Steffen Thorsen (2012-03-01) # According to Radio Reloj, Cuba will start DST on Midnight between March # 31 and April 1. # # Radio Reloj has the following info (Spanish): # http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril # # Our info on it: # http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html # From Steffen Thorsen (2012-11-03): # Radio Reloj and many other sources report that Cuba is changing back # to standard time on 2012-11-04: # http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre # From Paul Eggert (2012-11-03): # For now, assume the future rule is first Sunday in November. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Cuba 1928 only - Jun 10 0:00 1:00 D Rule Cuba 1928 only - Oct 10 0:00 0 S Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S Rule Cuba 1965 only - Jun 1 0:00 1:00 D Rule Cuba 1965 only - Sep 30 0:00 0 S Rule Cuba 1966 only - May 29 0:00 1:00 D Rule Cuba 1966 only - Oct 2 0:00 0 S Rule Cuba 1967 only - Apr 8 0:00 1:00 D Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S Rule Cuba 1968 only - Apr 14 0:00 1:00 D Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S Rule Cuba 1972 1974 - Oct 8 0:00 0 S Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S Rule Cuba 1978 only - May 7 0:00 1:00 D Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S Rule Cuba 1996 only - Oct 6 0:00s 0 S Rule Cuba 1997 only - Oct 12 0:00s 0 S Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S Rule Cuba 2000 2003 - Apr Sun>=1 0:00s 1:00 D Rule Cuba 2004 only - Mar lastSun 0:00s 1:00 D Rule Cuba 2006 2010 - Oct lastSun 0:00s 0 S Rule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D Rule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D Rule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D Rule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D Rule Cuba 2011 only - Nov 13 0:00s 0 S Rule Cuba 2012 only - Apr 1 0:00s 1:00 D Rule Cuba 2012 max - Nov Sun>=1 0:00s 0 S Rule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Havana -5:29:28 - LMT 1890 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT -5:00 Cuba C%sT # Dominica # See America/Port_of_Spain. # Dominican Republic # From Steffen Thorsen (2000-10-30): # Enrique Morales reported to me that the Dominican Republic has changed the # time zone to Eastern Standard Time as of Sunday 29 at 2 am.... # http://www.listin.com.do/antes/261000/republica/princi.html # From Paul Eggert (2000-12-04): # That URL (2000-10-26, in Spanish) says they planned to use US-style DST. # From Rives McDow (2000-12-01): # Dominican Republic changed its mind and presidential decree on Tuesday, # November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the # Dominican Republic will be reverting to 8 hours from the International Date # Line, and will not be using DST in the foreseeable future. The reason they # decided to use DST was to be in synch with Puerto Rico, who was also going # to implement DST. When Puerto Rico didn't implement DST, the president # decided to revert. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule DR 1966 only - Oct 30 0:00 1:00 D Rule DR 1967 only - Feb 28 0:00 0 S Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD Rule DR 1970 only - Feb 21 0:00 0 S Rule DR 1971 only - Jan 20 0:00 0 S Rule DR 1972 1974 - Jan 21 0:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Santo_Domingo -4:39:36 - LMT 1890 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT -5:00 DR E%sT 1974 Oct 27 -4:00 - AST 2000 Oct 29 02:00 -5:00 US E%sT 2000 Dec 3 01:00 -4:00 - AST # El Salvador # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D Rule Salv 1987 1988 - Sep lastSun 0:00 0 S # There are too many San Salvadors elsewhere, so use America/El_Salvador # instead of America/San_Salvador. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador -6:00 Salv C%sT # Grenada # Guadeloupe # St Barthélemy # St Martin (French part) # See America/Port_of_Spain. # Guatemala # # From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: # Diario Co Latino, at # , # says in an article dated 2006-04-19 that the Guatemalan government had # decided on that date to advance official time by 60 minutes, to lessen the # impact of the elevated cost of oil.... Daylight saving time will last from # 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). # From Paul Eggert (2006-06-22): # The Ministry of Energy and Mines, press release CP-15/2006 # (2006-04-19), says DST ends at 24:00. See # . # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Guat 1973 only - Nov 25 0:00 1:00 D Rule Guat 1974 only - Feb 24 0:00 0 S Rule Guat 1983 only - May 21 0:00 1:00 D Rule Guat 1983 only - Sep 22 0:00 0 S Rule Guat 1991 only - Mar 23 0:00 1:00 D Rule Guat 1991 only - Sep 7 0:00 0 S Rule Guat 2006 only - Apr 30 0:00 1:00 D Rule Guat 2006 only - Oct 1 0:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5 -6:00 Guat C%sT # Haiti # From Gwillim Law (2005-04-15): # Risto O. Nykänen wrote me that Haiti is now on DST. # I searched for confirmation, and I found a press release # on the Web page of the Haitian Consulate in Chicago (2005-03-31), # . Translated from French, it says: # # "The Prime Minister's Communication Office notifies the public in general # and the press in particular that, following a decision of the Interior # Ministry and the Territorial Collectivities [I suppose that means the # provinces], Haiti will move to Eastern Daylight Time in the night from next # Saturday the 2nd to Sunday the 3rd. # # "Consequently, the Prime Minister's Communication Office wishes to inform # the population that the country's clocks will be set forward one hour # starting at midnight. This provision will hold until the last Saturday in # October 2005. # # "Port-au-Prince, March 31, 2005" # # From Steffen Thorsen (2006-04-04): # I have been informed by users that Haiti observes DST this year like # last year, so the current "only" rule for 2005 might be changed to a # "max" rule or to last until 2006. (Who knows if they will observe DST # next year or if they will extend their DST like US/Canada next year). # # I have found this article about it (in French): # http://www.haitipressnetwork.com/news.cfm?articleID=7612 # # The reason seems to be an energy crisis. # From Stephen Colebourne (2007-02-22): # Some IATA info: Haiti won't be having DST in 2007. # From Steffen Thorsen (2012-03-11): # According to several news sources, Haiti will observe DST this year, # apparently using the same start and end date as USA/Canada. # So this means they have already changed their time. # # http://www.alterpresse.org/spip.php?article12510 # http://radiovision2000haiti.net/home/?p=13253 # # From Arthur David Olson (2012-03-11): # The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to # 3:00 a.m. rather than the traditional Haitian jump at midnight. # Assume a US-style fall back as well. # From Steffen Thorsen (2013-03-10): # It appears that Haiti is observing DST this year as well, same rules # as US/Canada. They did it last year as well, and it looks like they # are going to observe DST every year now... # # http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/ # http://www.canalplushaiti.net/?p=6714 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Haiti 1983 only - May 8 0:00 1:00 D Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S # Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. # Go with IATA. Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S Rule Haiti 2012 max - Mar Sun>=8 2:00 1:00 D Rule Haiti 2012 max - Nov Sun>=1 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Port-au-Prince -4:49:20 - LMT 1890 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT -5:00 Haiti E%sT # Honduras # Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. # From Paul Eggert (2006-05-05): # worldtimezone.com reports a 2006-05-02 Spanish-language AP article # saying Honduras will start using DST midnight Saturday, effective 4 # months until September. La Tribuna reported today # that Manuel Zelaya, the president # of Honduras, refused to back down on this. # From Jesper Nørgaard Welen (2006-08-08): # It seems that Honduras has returned from DST to standard time this Monday at # 00:00 hours (prolonging Sunday to 25 hours duration). # http://www.worldtimezone.com/dst_news/dst_news_honduras04.html # From Paul Eggert (2006-08-08): # Also see Diario El Heraldo, The country returns to standard time (2006-08-08) # . # It mentions executive decree 18-2006. # From Steffen Thorsen (2006-08-17): # Honduras will observe DST from 2007 to 2009, exact dates are not # published, I have located this authoritative source: # http://www.presidencia.gob.hn/noticia.aspx?nId=47 # From Steffen Thorsen (2007-03-30): # http://www.laprensahn.com/pais_nota.php?id04962=7386 # So it seems that Honduras will not enter DST this year.... # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D Rule Hond 1987 1988 - Sep lastSun 0:00 0 S Rule Hond 2006 only - May Sun>=1 0:00 1:00 D Rule Hond 2006 only - Aug Mon>=1 0:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr -6:00 Hond C%sT # # Great Swan I ceded by US to Honduras in 1972 # Jamaica # Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an # unspecified official document, and says "This time is used throughout the # island". Go with Milne. Round to the nearest second as required by zic. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Jamaica -5:07:11 - LMT 1890 # Kingston -5:07:11 - KMT 1912 Feb # Kingston Mean Time -5:00 - EST 1974 Apr 28 2:00 -5:00 US E%sT 1984 -5:00 - EST # Martinique # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France -4:04:20 - FFMT 1911 May # Fort-de-France MT -4:00 - AST 1980 Apr 6 -4:00 1:00 ADT 1980 Sep 28 -4:00 - AST # Montserrat # See America/Port_of_Spain. # Nicaragua # # This uses Shanks & Pottenger for times before 2005. # # From Steffen Thorsen (2005-04-12): # I've got reports from 8 different people that Nicaragua just started # DST on Sunday 2005-04-10, in order to save energy because of # expensive petroleum. The exact end date for DST is not yet # announced, only "September" but some sites also say "mid-September". # Some background information is available on the President's official site: # http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm # The Decree, no 23-2005 is available here: # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2005/Decreto%2023-2005%20Se%20adelanta%20en%20una%20hora%20en%20todo%20el%20territorio%20nacional%20apartir%20de%20las%2024horas%20del%2009%20de%20Abril.pdf # # From Paul Eggert (2005-05-01): # The decree doesn't say anything about daylight saving, but for now let's # assume that it is daylight saving.... # # From Gwillim Law (2005-04-21): # The Associated Press story on the time change, which can be found at # http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html # and elsewhere, says (fifth paragraph, translated from Spanish): "The last # time that a change of clocks was applied to save energy was in the year 2000 # during the Arnoldo Alemán administration."... # The northamerica file says that Nicaragua has been on UTC-6 continuously # since December 1998. I wasn't able to find any details of Nicaraguan time # changes in 2000. Perhaps a note could be added to the northamerica file, to # the effect that we have indirect evidence that DST was observed in 2000. # # From Jesper Nørgaard Welen (2005-11-02): # Nicaragua left DST the 2005-10-02 at 00:00 (local time). # http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm # (2005-09-26) # # From Jesper Nørgaard Welen (2006-05-05): # http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 # (my informal translation) # By order of the president of the republic, Enrique Bolaños, Nicaragua # advanced by sixty minutes their official time, yesterday at 2 in the # morning, and will stay that way until 30th of September. # # From Jesper Nørgaard Welen (2006-09-30): # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf # My informal translation runs: # The natural sun time is restored in all the national territory, in that the # time is returned one hour at 01:00 am of October 1 of 2006. # # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S Rule Nic 2005 only - Apr 10 0:00 1:00 D Rule Nic 2005 only - Oct Sun>=1 0:00 0 S Rule Nic 2006 only - Apr 30 2:00 1:00 D Rule Nic 2006 only - Oct Sun>=1 1:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Managua -5:45:08 - LMT 1890 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? -6:00 - CST 1973 May -5:00 - EST 1975 Feb 16 -6:00 Nic C%sT 1992 Jan 1 4:00 -5:00 - EST 1992 Sep 24 -6:00 - CST 1993 -5:00 - EST 1997 -6:00 Nic C%sT # Panama # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Panama -5:18:08 - LMT 1890 -5:19:36 - CMT 1908 Apr 22 # Colón Mean Time -5:00 - EST # Puerto Rico # There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan -4:00 - AST 1942 May 3 -4:00 US A%sT 1946 -4:00 - AST # St Kitts-Nevis # St Lucia # See America/Port_of_Spain. # St Pierre and Miquelon # There are too many St Pierres elsewhere, so we'll use 'Miquelon'. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre -4:00 - AST 1980 May -3:00 - PMST 1987 # Pierre & Miquelon Time -3:00 Canada PM%sT # St Vincent and the Grenadines # See America/Port_of_Spain. # Turks and Caicos # # From Chris Dunn in # # (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the # daylight saving dates for time changes have been adjusted to match # the recent U.S. change of dates. # # From Brian Inglis (2007-04-28): # http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] # there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three # rows before that there is an out of date entry for Oct: # "Eastern Standard Times Begins 2007 # Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" # indicating that the normal ET rules are followed. # # From Paul Eggert (2006-05-01): # Shanks & Pottenger say they use US DST rules, but IATA SSIM (1991/1998) # says they switch at midnight. Go with Shanks & Pottenger. # # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule TC 1979 1986 - Apr lastSun 2:00 1:00 D Rule TC 1979 2006 - Oct lastSun 2:00 0 S Rule TC 1987 2006 - Apr Sun>=1 2:00 1:00 D Rule TC 2007 max - Mar Sun>=8 2:00 1:00 D Rule TC 2007 max - Nov Sun>=1 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Grand_Turk -4:44:32 - LMT 1890 -5:07:11 - KMT 1912 Feb # Kingston Mean Time -5:00 TC E%sT # British Virgin Is # Virgin Is # See America/Port_of_Spain. # Local Variables: # coding: utf-8 # End: @ 1.1.1.1.2.1 log @file northamerica was added on branch tls-earlyentropy on 2014-08-10 06:51:01 +0000 @ text @d1 3148 @ 1.1.1.1.2.2 log @Rebase. @ text @a0 3148 # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. # also includes Central America and the Caribbean # This data is by no means authoritative; if you think you know better, # go ahead and edit the file (and please send any changes to # tz@@iana.org for general use in the future). # From Paul Eggert (1999-03-22): # A reliable and entertaining source about time zones is # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). ############################################################################### # United States # From Paul Eggert (1999-03-31): # Howse writes (pp 121-125) that time zones were invented by # Professor Charles Ferdinand Dowd (1825-1904), # Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). # His pamphlet "A System of National Time for Railroads" (1870) # was the result of his proposals at the Convention of Railroad Trunk Lines # in New York City (1869-10). His 1870 proposal was based on Washington, DC, # but in 1872-05 he moved the proposed origin to Greenwich. # His proposal was adopted by the railroads on 1883-11-18 at 12:00, # and the most of the country soon followed suit. # From Paul Eggert (2005-04-16): # That 1883 transition occurred at 12:00 new time, not at 12:00 old time. # See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). # From Paul Eggert (2006-03-22): # A good source for time zone historical data in the US is # Thomas G. Shanks, The American Atlas (5th edition), # San Diego: ACS Publications, Inc. (1991). # Make sure you have the errata sheet; the book is somewhat useless without it. # It is the source for most of the pre-1991 US entries below. # From Paul Eggert (2001-03-06): # Daylight Saving Time was first suggested as a joke by Benjamin Franklin # in his whimsical essay "An Economical Project for Diminishing the Cost # of Light" published in the Journal de Paris (1784-04-26). # Not everyone is happy with the results: # # I don't really care how time is reckoned so long as there is some # agreement about it, but I object to being told that I am saving # daylight when my reason tells me that I am doing nothing of the kind. # I even object to the implication that I am wasting something # valuable if I stay in bed after the sun has risen. As an admirer # of moonlight I resent the bossy insistence of those who want to # reduce my time for enjoying it. At the back of the Daylight Saving # scheme I detect the bony, blue-fingered hand of Puritanism, eager # to push people into bed earlier, and get them up earlier, to make # them healthy, wealthy and wise in spite of themselves. # # -- Robertson Davies, The diary of Samuel Marchbanks, # Clarke, Irwin (1947), XIX, Sunday # # For more about the first ten years of DST in the United States, see # Robert Garland, Ten years of daylight saving from the Pittsburgh standpoint # (Carnegie Library of Pittsburgh, 1927) # . # # Shanks says that DST was called "War Time" in the US in 1918 and 1919. # However, DST was imposed by the Standard Time Act of 1918, which # was the first nationwide legal time standard, and apparently # time was just called "Standard Time" or "Daylight Saving Time". # From Arthur David Olson: # US Daylight Saving Time ended on the last Sunday of *October* in 1974. # See, for example, the front page of the Saturday, 1974-10-26 # and Sunday, 1974-10-27 editions of the Washington Post. # From Arthur David Olson: # Before the Uniform Time Act of 1966 took effect in 1967, observance of # Daylight Saving Time in the US was by local option, except during wartime. # From Arthur David Olson (2000-09-25): # Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. # In the introduction, Oboler spoke of "Eastern Peace Time." # An AltaVista search turned up # : # "When the time is announced over the radio now, it is 'Eastern Peace # Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." # (August 1945) by way of confirmation. # From Joseph Gallant citing # George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): # At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set # to switch to London for Attlee's address, but the American people # never got to hear his speech live. According to one press account, # CBS' Bob Trout was first to announce the word of Japan's surrender, # but a few seconds later, NBC, ABC and Mutual also flashed the word # of surrender, all of whom interrupting the bells of Big Ben in # London which were to precede Mr. Attlee's speech. # From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From # Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: # # ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. # Any announcement from Asia would reach St. John's New York newsroom on a # wire service teletype machine, which had prescribed signals for major news. # Associated Press, for example, would ring five bells before spewing out # typed copy of an important story, and 10 bells for news "of transcendental # importance." # # On Aug. 14, stalling while talking steadily into the NBC networks' open # microphone, St. John heard five bells and waited only to hear a sixth bell, # before announcing confidently: "Ladies and gentlemen, World War II is over. # The Japanese have agreed to our surrender terms." # # He had scored a 20-second scoop on other broadcasters. # From Arthur David Olson (2005-08-22): # Paul has been careful to use the "US" rules only in those locations # that are part of the United States; this reflects the real scope of # U.S. government action. So even though the "US" rules have changed # in the latest release, other countries won't be affected. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule US 1918 1919 - Mar lastSun 2:00 1:00 D Rule US 1918 1919 - Oct lastSun 2:00 0 S Rule US 1942 only - Feb 9 2:00 1:00 W # War Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace Rule US 1945 only - Sep 30 2:00 0 S Rule US 1967 2006 - Oct lastSun 2:00 0 S Rule US 1967 1973 - Apr lastSun 2:00 1:00 D Rule US 1974 only - Jan 6 2:00 1:00 D Rule US 1975 only - Feb 23 2:00 1:00 D Rule US 1976 1986 - Apr lastSun 2:00 1:00 D Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D Rule US 2007 max - Mar Sun>=8 2:00 1:00 D Rule US 2007 max - Nov Sun>=1 2:00 0 S # From Arthur David Olson, 2005-12-19 # We generate the files specified below to guard against old files with # obsolete information being left in the time zone binary directory. # We limit the list to names that have appeared in previous versions of # this time zone package. # We do these as separate Zones rather than as Links to avoid problems if # a particular place changes whether it observes DST. # We put these specifications here in the northamerica file both to # increase the chances that they'll actually get compiled and to # avoid the need to duplicate the US rules in another file. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone EST -5:00 - EST Zone MST -7:00 - MST Zone HST -10:00 - HST Zone EST5EDT -5:00 US E%sT Zone CST6CDT -6:00 US C%sT Zone MST7MDT -7:00 US M%sT Zone PST8PDT -8:00 US P%sT # From Bob Devine (1988-01-28): # ...Alaska (and Hawaii) had the timezone names changed in 1967. # old new # Pacific Standard Time(PST) -same- # Yukon Standard Time(YST) -same- # Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) # Nome Standard Time (NT) Bering Standard Time (BST) # # ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. # The YST zone now covers nearly all of the state, AHST just part # of the Aleutian islands. No DST. # From Paul Eggert (1995-12-19): # The tables below use 'NST', not 'NT', for Nome Standard Time. # I invented 'CAWT' for Central Alaska War Time. # From U. S. Naval Observatory (1989-01-19): # USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON # USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 # USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON # USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 # USA MOUNTAIN 7 H BEHIND UTC DENVER # USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 # USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO # USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 # USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) # USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) # USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W # USA " 9 H BEHIND UTC APR 3 - OCT 30 # USA HAWAII 10 H BEHIND UTC # USA BERING 11 H BEHIND UTC SAMOA, MIDWAY # From Arthur David Olson (1989-01-21): # The above dates are for 1988. # Note the "AKST" and "AKDT" abbreviations, the claim that there's # no DST in Samoa, and the claim that there is DST in Alaska and the # Aleutians. # From Arthur David Olson (1988-02-13): # Legal standard time zone names, from United States Code (1982 Edition and # Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names # up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 # took effect), as explained in sections 263 and 261: # (none) # United States standard eastern time # United States standard mountain time # United States standard central time # United States standard Pacific time # (none) # United States standard Alaska time # (none) # Next, names from 1967-04-01 until 1983-11-30 (the date for # public law 98-181): # Atlantic standard time # eastern standard time # central standard time # mountain standard time # Pacific standard time # Yukon standard time # Alaska-Hawaii standard time # Bering standard time # And after 1983-11-30: # Atlantic standard time # eastern standard time # central standard time # mountain standard time # Pacific standard time # Alaska standard time # Hawaii-Aleutian standard time # Samoa standard time # The law doesn't give abbreviations. # # From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: # Public law 106-564 (2000-12-23) introduced the abbreviation # "Chamorro Standard Time" for time in Guam and the Northern Marianas. # See the file "australasia". # From Arthur David Olson, 2005-08-09 # The following was signed into law on 2005-08-08. # # H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. # (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15 # U.S.C. 260a(a)) is amended-- # (1) by striking "first Sunday of April" and inserting "second # Sunday of March"; and # (2) by striking "last Sunday of October" and inserting "first # Sunday of November'. # (b) Effective Date.--Subsection (a) shall take effect 1 year after the # date of enactment of this Act or March 1, 2007, whichever is later. # (c) Report to Congress.--Not later than 9 months after the effective # date stated in subsection (b), the Secretary shall report to Congress # on the impact of this section on energy consumption in the United # States. # (d) Right to Revert.--Congress retains the right to revert the # Daylight Saving Time back to the 2005 time schedules once the # Department study is complete. # US eastern time, represented by New York # Connecticut, Delaware, District of Columbia, most of Florida, # Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky # (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, # New Hampshire, New Jersey, New York, North Carolina, Ohio, # Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, # Vermont, Virginia, West Virginia # From Dave Cantor (2004-11-02): # Early this summer I had the occasion to visit the Mount Washington # Observatory weather station atop (of course!) Mount Washington [, NH].... # One of the staff members said that the station was on Eastern Standard Time # and didn't change their clocks for Daylight Saving ... so that their # reports will always have times which are 5 hours behind UTC. # From Paul Eggert (2005-08-26): # According to today's Huntsville Times # # a few towns on Alabama's "eastern border with Georgia, such as Phenix City # in Russell County, Lanett in Chambers County and some towns in Lee County, # set their watches and clocks on Eastern time." It quotes H.H. "Bubba" # Roberts, city administrator in Phenix City. as saying "We are in the Central # time zone, but we do go by the Eastern time zone because so many people work # in Columbus." # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule NYC 1920 only - Mar lastSun 2:00 1:00 D Rule NYC 1920 only - Oct lastSun 2:00 0 S Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D Rule NYC 1921 1954 - Sep lastSun 2:00 0 S Rule NYC 1955 1966 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 -5:00 US E%sT 1920 -5:00 NYC E%sT 1942 -5:00 US E%sT 1946 -5:00 NYC E%sT 1967 -5:00 US E%sT # US central time, represented by Chicago # Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, # Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and # Washington counties), Illinois, western Indiana # (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, # Vanderburgh, and Warrick counties), Iowa, most of Kansas, western # Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern # Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, # western Tennessee, most of Texas, Wisconsin # From Larry M. Smith (2006-04-26) re Wisconsin: # http://www.legis.state.wi.us/statutes/Stat0175.pdf ... # is currently enforced at the 01:00 time of change. Because the local # "bar time" in the state corresponds to 02:00, a number of citations # are issued for the "sale of class 'B' alcohol after prohibited # hours" within the deviated hour of this change every year.... # # From Douglas R. Bomberg (2007-03-12): # Wisconsin has enacted (nearly eleventh-hour) legislation to get WI # Statue 175 closer in synch with the US Congress' intent.... # http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Chicago 1920 only - Jun 13 2:00 1:00 D Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 -6:00 US C%sT 1920 -6:00 Chicago C%sT 1936 Mar 1 2:00 -5:00 - EST 1936 Nov 15 2:00 -6:00 Chicago C%sT 1942 -6:00 US C%sT 1946 -6:00 Chicago C%sT 1967 -6:00 US C%sT # Oliver County, ND switched from mountain to central time on 1992-10-25. Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 -7:00 US M%sT 1992 Oct 25 02:00 -6:00 US C%sT # Morton County, ND, switched from mountain to central time on # 2003-10-26, except for the area around Mandan which was already central time. # See . # Officially this switch also included part of Sioux County, and # Jones, Mellette, and Todd Counties in South Dakota; # but in practice these other counties were already observing central time. # See . Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 -7:00 US M%sT 2003 Oct 26 02:00 -6:00 US C%sT # From Josh Findley (2011-01-21): # ...it appears that Mercer County, North Dakota, changed from the # mountain time zone to the central time zone at the last transition from # daylight-saving to standard time (on Nov. 7, 2010): # http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm # http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html # From Andy Lipscomb (2011-01-24): # ...according to the Census Bureau, the largest city is Beulah (although # it's commonly referred to as Beulah-Hazen, with Hazen being the next # largest city in Mercer County). Google Maps places Beulah's city hall # at 47 degrees 15' 51" N, 101 degrees 46' 40" W, which yields an offset # of 6h47'07". Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53 -7:00 US M%sT 2010 Nov 7 2:00 -6:00 US C%sT # US mountain time, represented by Denver # # Colorado, far western Kansas, Montana, western # Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), # New Mexico, southwestern North Dakota, # western South Dakota, far western Texas (El Paso County, Hudspeth County, # and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming # # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D Rule Denver 1920 only - Oct lastSun 2:00 0 S Rule Denver 1921 only - May 22 2:00 0 S Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D Rule Denver 1965 1966 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 -7:00 US M%sT 1920 -7:00 Denver M%sT 1942 -7:00 US M%sT 1946 -7:00 Denver M%sT 1967 -7:00 US M%sT # US Pacific time, represented by Los Angeles # # California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, # Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county # north of the Salmon River, and the towns of Burgdorf and Warren), # Nevada (except West Wendover), Oregon (except the northern 3/4 of # Malheur county), and Washington # # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule CA 1948 only - Mar 14 2:00 1:00 D Rule CA 1949 only - Jan 1 2:00 0 S Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D Rule CA 1950 1961 - Sep lastSun 2:00 0 S Rule CA 1962 1966 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 -8:00 US P%sT 1946 -8:00 CA P%sT 1967 -8:00 US P%sT # Alaska # AK%sT is the modern abbreviation for -9:00 per USNO. # # From Paul Eggert (2001-05-30): # Howse writes that Alaska switched from the Julian to the Gregorian calendar, # and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. # This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, # also a Friday. Include only the time zone part of this transition, # ignoring the switch from Julian to Gregorian, since we can't represent # the Julian calendar. # # As far as we know, none of the exact locations mentioned below were # permanently inhabited in 1867 by anyone using either calendar. # (Yakutat was colonized by the Russians in 1799, but the settlement # was destroyed in 1805 by a Yakutat-kon war party.) However, there # were nearby inhabitants in some cases and for our purposes perhaps # it's best to simply use the official transition. # From Paul Eggert (2014-07-18): # One opinion of the early-1980s turmoil in Alaska over time zones and # daylight saving time appeared as graffiti on a Juneau airport wall: # "Welcome to Juneau. Please turn your watch back to the 19th century." # See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01. # http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html # # Steve Ferguson (2011-01-31) referred to the following source: # Norris F. Keeping time in Alaska: national directives, local response. # Alaska History 2001;16(1-2). # http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/keeping-time-in-alaska/ # From Arthur David Olson (2011-02-01): # Here's database-relevant material from the 2001 "Alaska History" article: # # On September 20 [1979]...DOT...officials decreed that on April 27, # 1980, Juneau and other nearby communities would move to Yukon Time. # Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on # Pacific Time. # # ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the # Department's September 1979 decision. Juneau and other communities in # northern Southeast reverted to Pacific Time on October 26. # # On October 28 [1983]...the Metlakatla Indian Community Council voted # unanimously to keep the reservation on Pacific Time. # # According to DOT official Joanne Petrie, Indian reservations are not # bound to follow time zones imposed by neighboring jurisdictions. # # (The last is consistent with how the database now handles the Navajo # Nation.) # From Arthur David Olson (2011-02-09): # I just spoke by phone with a staff member at the Metlakatla Indian # Community office (using contact information available at # http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla # It's shortly after 1:00 here on the east coast of the United States; # the staffer said it was shortly after 10:00 there. When I asked whether # that meant they were on Pacific time, they said no - they were on their # own time. I asked about daylight saving; they said it wasn't used. I # did not inquire about practices in the past. # From Arthur David Olson (2011-08-17): # For lack of better information, assume that Metlakatla's # abandonment of use of daylight saving resulted from the 1983 vote. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Juneau 15:02:19 - LMT 1867 Oct 18 -8:57:41 - LMT 1900 Aug 20 12:00 -8:00 - PST 1942 -8:00 US P%sT 1946 -8:00 - PST 1969 -8:00 US P%sT 1980 Apr 27 2:00 -9:00 US Y%sT 1980 Oct 26 2:00 -8:00 US P%sT 1983 Oct 30 2:00 -9:00 US Y%sT 1983 Nov 30 -9:00 US AK%sT Zone America/Sitka 14:58:47 - LMT 1867 Oct 18 -9:01:13 - LMT 1900 Aug 20 12:00 -8:00 - PST 1942 -8:00 US P%sT 1946 -8:00 - PST 1969 -8:00 US P%sT 1983 Oct 30 2:00 -9:00 US Y%sT 1983 Nov 30 -9:00 US AK%sT Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 18 -8:46:18 - LMT 1900 Aug 20 12:00 -8:00 - PST 1942 -8:00 US P%sT 1946 -8:00 - PST 1969 -8:00 US P%sT 1983 Oct 30 2:00 -8:00 - PST Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18 -9:18:55 - LMT 1900 Aug 20 12:00 -9:00 - YST 1942 -9:00 US Y%sT 1946 -9:00 - YST 1969 -9:00 US Y%sT 1983 Nov 30 -9:00 US AK%sT Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18 -9:59:36 - LMT 1900 Aug 20 12:00 -10:00 - CAT 1942 -10:00 US CAT/CAWT 1945 Aug 14 23:00u -10:00 US CAT/CAPT 1946 # Peace -10:00 - CAT 1967 Apr -10:00 - AHST 1969 -10:00 US AH%sT 1983 Oct 30 2:00 -9:00 US Y%sT 1983 Nov 30 -9:00 US AK%sT Zone America/Nome 12:58:21 - LMT 1867 Oct 18 -11:01:38 - LMT 1900 Aug 20 12:00 -11:00 - NST 1942 -11:00 US N%sT 1946 -11:00 - NST 1967 Apr -11:00 - BST 1969 -11:00 US B%sT 1983 Oct 30 2:00 -9:00 US Y%sT 1983 Nov 30 -9:00 US AK%sT Zone America/Adak 12:13:21 - LMT 1867 Oct 18 -11:46:38 - LMT 1900 Aug 20 12:00 -11:00 - NST 1942 -11:00 US N%sT 1946 -11:00 - NST 1967 Apr -11:00 - BST 1969 -11:00 US B%sT 1983 Oct 30 2:00 -10:00 US AH%sT 1983 Nov 30 -10:00 US HA%sT # The following switches don't quite make our 1970 cutoff. # # Shanks writes that part of southwest Alaska (e.g. Aniak) # switched from -11:00 to -10:00 on 1968-09-22 at 02:00, # and another part (e.g. Akiak) made the same switch five weeks later. # # From David Flater (2004-11-09): # In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska # Historic Preservation Commission, provided this information, which # suggests that Unalaska deviated from statutory time from early 1967 # possibly until 1983: # # Minutes of the Unalaska City Council Meeting, January 10, 1967: # "Except for St. Paul and Akutan, Unalaska is the only important # location not on Alaska Standard Time. The following resolution was # made by William Robinson and seconded by Henry Swanson: Be it # resolved that the City of Unalaska hereby goes to Alaska Standard # Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, # January 14, Alaska Standard Time.) This resolution was passed with # three votes for and one against." # Hawaii # From Arthur David Olson (2010-12-09): # "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225 # of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09, # the article is available at # http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf # and indicates that standard time was adopted effective noon, January # 13, 1896 (page 218), that in "1933, the Legislature decreed daylight # saving for the period between the last Sunday of each April and the # last Sunday of each September, but less than a month later repealed the # act," (page 220), that year-round daylight saving time was in effect # from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for # when clocks changed) and that clocks were changed by 30 minutes # effective the second Sunday of June, 1947 (page 219, with no time of # day given for when clocks changed). A footnote for the 1933 changes # cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933) # and Act 163 (approved 21 May 1933)." # From Arthur David Olson (2011-01-19): # The following is from "Laws of the Territory of Hawaii Passed by the # Seventeenth Legislature: Regular Session 1933," available (as of # 2011-01-19) at American University's Pence Law Library. Page 85: "Act # 90...At 2 o'clock ante meridian of the last Sunday in April of each # year, the standard time of this Territory shall be advanced one # hour...This Act shall take effect upon its approval. Approved this 26th # day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of # Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is # hereby repealed...This Act shall take effect upon its approval, upon # which date the standard time of this Territory shall be restored to # that existing immediately prior to the taking effect of said Act 90. # Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor # of the Territory of Hawaii." # # Note that 1933-05-21 was a Sunday. # We're left to guess the time of day when Act 163 was approved; guess noon. Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 #Schmitt&Cox -10:30 - HST 1933 Apr 30 2:00 #Laws 1933 -10:30 1:00 HDT 1933 May 21 12:00 #Laws 1933+12 -10:30 - HST 1942 Feb 09 2:00 #Schmitt&Cox+2 -10:30 1:00 HDT 1945 Sep 30 2:00 #Schmitt&Cox+2 -10:30 - HST 1947 Jun 8 2:00 #Schmitt&Cox+2 -10:00 - HST Link Pacific/Honolulu Pacific/Johnston # Now we turn to US areas that have diverged from the consensus since 1970. # Arizona mostly uses MST. # From Paul Eggert (2002-10-20): # # The information in the rest of this paragraph is derived from the # Daylight Saving Time web page # (2002-01-23) # maintained by the Arizona State Library, Archives and Public Records. # Between 1944-01-01 and 1944-04-01 the State of Arizona used standard # time, but by federal law railroads, airlines, bus lines, military # personnel, and some engaged in interstate commerce continued to # observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix # Gazette says that was the date the law changed, and that 04-01 was # the date the state's clocks would change. In 1945 the State of # Arizona used standard time all year, again with exceptions only as # mandated by federal law. Arizona observed DST in 1967, but Arizona # Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. # # Shanks says the 1944 experiment came to an end on 1944-03-17. # Go with the Arizona State Library instead. Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 -7:00 US M%sT 1944 Jan 1 00:01 -7:00 - MST 1944 Apr 1 00:01 -7:00 US M%sT 1944 Oct 1 00:01 -7:00 - MST 1967 -7:00 US M%sT 1968 Mar 21 -7:00 - MST # From Arthur David Olson (1988-02-13): # A writer from the Inter Tribal Council of Arizona, Inc., # notes in private correspondence dated 1987-12-28 that "Presently, only the # Navajo Nation participates in the Daylight Saving Time policy, due to its # large size and location in three states." (The "only" means that other # tribal nations don't use DST.) # # From Paul Eggert (2013-08-26): # See America/Denver for a zone appropriate for the Navajo Nation. # Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, # Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, # Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, # Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, # Teton, Twin Falls, Valley, Washington counties, and the southern # quarter of Idaho county) and eastern Oregon (most of Malheur County) # switched four weeks late in 1974. # # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 -8:00 US P%sT 1923 May 13 2:00 -7:00 US M%sT 1974 -7:00 - MST 1974 Feb 3 2:00 -7:00 US M%sT # Indiana # # For a map of Indiana's time zone regions, see: # What time is it in Indiana? (2006-03-01) # # # From Paul Eggert (2007-08-17): # Since 1970, most of Indiana has been like America/Indiana/Indianapolis, # with the following exceptions: # # - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, # Vanderburgh, and Warrick counties have been like America/Chicago. # # - Dearborn and Ohio counties have been like America/New_York. # # - Clark, Floyd, and Harrison counties have been like # America/Kentucky/Louisville. # # - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, # and Switzerland counties have their own time zone histories as noted below. # # Shanks partitioned Indiana into 345 regions, each with its own time history, # and wrote "Even newspaper reports present contradictory information." # Those Hoosiers! Such a flighty and changeable people! # Fortunately, most of the complexity occurred before our cutoff date of 1970. # # Other than Indianapolis, the Indiana place names are so nondescript # that they would be ambiguous if we left them at the 'America' level. # So we reluctantly put them all in a subdirectory 'America/Indiana'. # From Paul Eggert (2005-08-16): # http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006. # From Paul Eggert (2014-06-26): # https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana # says "DOT is relocating the time zone boundary in Indiana to move Starke, # Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the # Eastern Time Zone to the Central Time Zone.... The effective date of # this rule is 2 a.m. EST Sunday, April 2, 2006, which is the # changeover date from standard time to Daylight Saving Time." # Strictly speaking, this meant the affected counties changed their # clocks twice that night, but this obviously was in error. The intent # was that 01:59:59 EST be followed by 02:00:00 CDT. # From Gwillim Law (2007-02-10): # The Associated Press has been reporting that Pulaski County, Indiana is # going to switch from Central to Eastern Time on March 11, 2007.... # http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 -6:00 US C%sT 1920 -6:00 Indianapolis C%sT 1942 -6:00 US C%sT 1946 -6:00 Indianapolis C%sT 1955 Apr 24 2:00 -5:00 - EST 1957 Sep 29 2:00 -6:00 - CST 1958 Apr 27 2:00 -5:00 - EST 1969 -5:00 US E%sT 1971 -5:00 - EST 2006 -5:00 US E%sT # # Eastern Crawford County, Indiana, left its clocks alone in 1974, # as well as from 1976 through 2005. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D Rule Marengo 1951 only - Sep lastSun 2:00 0 S Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 -6:00 US C%sT 1951 -6:00 Marengo C%sT 1961 Apr 30 2:00 -5:00 - EST 1969 -5:00 US E%sT 1974 Jan 6 2:00 -6:00 1:00 CDT 1974 Oct 27 2:00 -5:00 US E%sT 1976 -5:00 - EST 2006 -5:00 US E%sT # # Daviess, Dubois, Knox, and Martin Counties, Indiana, # switched from eastern to central time in April 2006, then switched back # in November 2007. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D Rule Vincennes 1946 only - Sep lastSun 2:00 0 S Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S Rule Vincennes 1955 only - May 1 0:00 1:00 D Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D Rule Vincennes 1960 only - Oct lastSun 2:00 0 S Rule Vincennes 1961 only - Sep lastSun 2:00 0 S Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 -6:00 US C%sT 1946 -6:00 Vincennes C%sT 1964 Apr 26 2:00 -5:00 - EST 1969 -5:00 US E%sT 1971 -5:00 - EST 2006 Apr 2 2:00 -6:00 US C%sT 2007 Nov 4 2:00 -5:00 US E%sT # # Perry County, Indiana, switched from eastern to central time in April 2006. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Perry 1946 only - Apr lastSun 2:00 1:00 D Rule Perry 1946 only - Sep lastSun 2:00 0 S Rule Perry 1953 1954 - Apr lastSun 2:00 1:00 D Rule Perry 1953 1959 - Sep lastSun 2:00 0 S Rule Perry 1955 only - May 1 0:00 1:00 D Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D Rule Perry 1960 only - Oct lastSun 2:00 0 S Rule Perry 1961 only - Sep lastSun 2:00 0 S Rule Perry 1962 1963 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 -6:00 US C%sT 1946 -6:00 Perry C%sT 1964 Apr 26 2:00 -5:00 - EST 1969 -5:00 US E%sT 1971 -5:00 - EST 2006 Apr 2 2:00 -6:00 US C%sT # # Pike County, Indiana moved from central to eastern time in 1977, # then switched back in 2006, then switched back again in 2007. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Pike 1955 only - May 1 0:00 1:00 D Rule Pike 1955 1960 - Sep lastSun 2:00 0 S Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D Rule Pike 1961 1964 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 -6:00 US C%sT 1955 -6:00 Pike C%sT 1965 Apr 25 2:00 -5:00 - EST 1966 Oct 30 2:00 -6:00 US C%sT 1977 Oct 30 2:00 -5:00 - EST 2006 Apr 2 2:00 -6:00 US C%sT 2007 Nov 4 2:00 -5:00 US E%sT # # Starke County, Indiana moved from central to eastern time in 1991, # then switched back in 2006. # From Arthur David Olson (1991-10-28): # An article on page A3 of the Sunday, 1991-10-27 Washington Post # notes that Starke County switched from Central time to Eastern time as of # 1991-10-27. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D Rule Starke 1947 1954 - Sep lastSun 2:00 0 S Rule Starke 1955 1956 - Oct lastSun 2:00 0 S Rule Starke 1957 1958 - Sep lastSun 2:00 0 S Rule Starke 1959 1961 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 -6:00 US C%sT 1947 -6:00 Starke C%sT 1962 Apr 29 2:00 -5:00 - EST 1963 Oct 27 2:00 -6:00 US C%sT 1991 Oct 27 2:00 -5:00 - EST 2006 Apr 2 2:00 -6:00 US C%sT # # Pulaski County, Indiana, switched from eastern to central time in # April 2006 and then switched back in March 2007. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 -6:00 US C%sT 1946 -6:00 Pulaski C%sT 1961 Apr 30 2:00 -5:00 - EST 1969 -5:00 US E%sT 1971 -5:00 - EST 2006 Apr 2 2:00 -6:00 US C%sT 2007 Mar 11 2:00 -5:00 US E%sT # # Switzerland County, Indiana, did not observe DST from 1973 through 2005. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 -6:00 US C%sT 1954 Apr 25 2:00 -5:00 - EST 1969 -5:00 US E%sT 1973 -5:00 - EST 2006 -5:00 US E%sT # Part of Kentucky left its clocks alone in 1974. # This also includes Clark, Floyd, and Harrison counties in Indiana. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Louisville 1921 only - May 1 2:00 1:00 D Rule Louisville 1921 only - Sep 1 2:00 0 S Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D Rule Louisville 1941 only - Sep lastSun 2:00 0 S Rule Louisville 1946 only - Jun 2 2:00 0 S Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 -6:00 US C%sT 1921 -6:00 Louisville C%sT 1942 -6:00 US C%sT 1946 -6:00 Louisville C%sT 1961 Jul 23 2:00 -5:00 - EST 1968 -5:00 US E%sT 1974 Jan 6 2:00 -6:00 1:00 CDT 1974 Oct 27 2:00 -5:00 US E%sT # # Wayne County, Kentucky # # From Lake Cumberland LIFE # # (1999-01-29) via WKYM-101.7: # Clinton County has joined Wayne County in asking the DoT to change from # the Central to the Eastern time zone.... The Wayne County government made # the same request in December. And while Russell County officials have not # taken action, the majority of respondents to a poll conducted there in # August indicated they would like to change to "fast time" also. # The three Lake Cumberland counties are the farthest east of any U.S. # location in the Central time zone. # # From Rich Wales (2000-08-29): # After prolonged debate, and despite continuing deep differences of opinion, # Wayne County (central Kentucky) is switching from Central (-0600) to Eastern # (-0500) time. They won't "fall back" this year. See Sara Shipley, # The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). # # From Paul Eggert (2001-07-16): # The final rule was published in the # Federal Register 65, 160 (2000-08-17), pp 50154-50158. # # Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 -6:00 US C%sT 1946 -6:00 - CST 1968 -6:00 US C%sT 2000 Oct 29 2:00 -5:00 US E%sT # From Rives McDow (2000-08-30): # Here ... are all the changes in the US since 1985. # Kearny County, KS (put all of county on central; # previously split between MST and CST) ... 1990-10 # Starke County, IN (from CST to EST) ... 1991-10 # Oliver County, ND (from MST to CST) ... 1992-10 # West Wendover, NV (from PST TO MST) ... 1999-10 # Wayne County, KY (from CST to EST) ... 2000-10 # # From Paul Eggert (2001-07-17): # We don't know where the line used to be within Kearny County, KS, # so omit that change for now. # See America/Indiana/Knox for the Starke County, IN change. # See America/North_Dakota/Center for the Oliver County, ND change. # West Wendover, NV officially switched from Pacific to mountain time on # 1999-10-31. See the # Federal Register 64, 203 (1999-10-21), pp 56705-56707. # # However, the Federal Register says that West Wendover already operated # on mountain time, and the rule merely made this official; # hence a separate tz entry is not needed. # Michigan # # From Bob Devine (1988-01-28): # Michigan didn't observe DST from 1968 to 1973. # # From Paul Eggert (1999-03-31): # Shanks writes that Michigan started using standard time on 1885-09-18, # but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) # that Detroit kept # # local time until 1900 when the City Council decreed that clocks should # be put back twenty-eight minutes to Central Standard Time. Half the # city obeyed, half refused. After considerable debate, the decision # was rescinded and the city reverted to Sun time. A derisive offer to # erect a sundial in front of the city hall was referred to the # Committee on Sewers. Then, in 1905, Central time was adopted # by city vote. # # This story is too entertaining to be false, so go with Howse over Shanks. # # From Paul Eggert (2001-03-06): # Garland (1927) writes "Cleveland and Detroit advanced their clocks # one hour in 1914." This change is not in Shanks. We have no more # info, so omit this for now. # # Most of Michigan observed DST from 1973 on, but was a bit late in 1975. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D Rule Detroit 1948 only - Sep lastSun 2:00 0 S Rule Detroit 1967 only - Jun 14 2:00 1:00 D Rule Detroit 1967 only - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Detroit -5:32:11 - LMT 1905 -6:00 - CST 1915 May 15 2:00 -5:00 - EST 1942 -5:00 US E%sT 1946 -5:00 Detroit E%sT 1973 -5:00 US E%sT 1975 -5:00 - EST 1975 Apr 27 2:00 -5:00 US E%sT # # Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, # switched from EST to CST/CDT in 1973. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D Rule Menominee 1946 only - Sep lastSun 2:00 0 S Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D Rule Menominee 1966 only - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 -6:00 US C%sT 1946 -6:00 Menominee C%sT 1969 Apr 27 2:00 -5:00 - EST 1973 Apr 29 2:00 -6:00 US C%sT # Navassa # administered by the US Fish and Wildlife Service # claimed by US under the provisions of the 1856 Guano Islands Act # also claimed by Haiti # occupied 1857/1900 by the Navassa Phosphate Co # US lighthouse 1917/1996-09 # currently uninhabited # see Mark Fineman, "An Isle Rich in Guano and Discord", # _Los Angeles Times_ (1998-11-10), A1, A10; it cites # Jimmy Skaggs, _The Great Guano Rush_ (1994). ################################################################################ # From Paul Eggert (2006-03-22): # A good source for time zone historical data outside the U.S. is # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), # San Diego: ACS Publications, Inc. (2003). # # Gwillim Law writes that a good source # for recent time zone data is the International Air Transport # Association's Standard Schedules Information Manual (IATA SSIM), # published semiannually. Law sent in several helpful summaries # of the IATA's data after 1990. # # Except where otherwise noted, Shanks & Pottenger is the source for # entries through 1990, and IATA SSIM is the source for entries afterwards. # # Other sources occasionally used include: # # Edward W. Whitman, World Time Differences, # Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), # which I found in the UCLA library. # # William Willett, The Waste of Daylight, 19th edition # # [PDF] (1914-03) # # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 # . # # See the 'europe' file for Greenland. # Canada # From Alain LaBonté (1994-11-14): # I post here the time zone abbreviations standardized in Canada # for both English and French in the CAN/CSA-Z234.4-89 standard.... # # UTC Standard time Daylight saving time # offset French English French English # -2:30 - - HAT NDT # -3 - - HAA ADT # -3:30 HNT NST - - # -4 HNA AST HAE EDT # -5 HNE EST HAC CDT # -6 HNC CST HAR MDT # -7 HNR MST HAP PDT # -8 HNP PST HAY YDT # -9 HNY YST - - # # HN: Heure Normale ST: Standard Time # HA: Heure Avancée DT: Daylight saving Time # # A: de l'Atlantique Atlantic # C: du Centre Central # E: de l'Est Eastern # M: Mountain # N: Newfoundland # P: du Pacifique Pacific # R: des Rocheuses # T: de Terre-Neuve # Y: du Yukon Yukon # # From Paul Eggert (1994-11-22): # Alas, this sort of thing must be handled by localization software. # Unless otherwise specified, the data for Canada are all from Shanks # & Pottenger. # From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, # 2007-03-01): # The British Columbia government announced yesterday that it will # adjust daylight savings next year to align with changes in the # U.S. and the rest of Canada.... # http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm # ... # Nova Scotia # Daylight saving time will be extended by four weeks starting in 2007.... # http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf # # [For New Brunswick] the new legislation dictates that the time change is to # be done at 02:00 instead of 00:01. # http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf # ... # Manitoba has traditionally changed the clock every fall at 03:00. # As of 2006, the transition is to take place one hour earlier at 02:00. # http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php # ... # [Alberta, Ontario, Quebec] will follow US rules. # http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM # http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm # http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF # ... # P.E.I. will follow US rules.... # http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf # ... # Province of Newfoundland and Labrador.... # http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm # ... # Yukon # http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf # ... # N.W.T. will follow US rules. Whoever maintains the government web site # does not seem to believe in bookmarks. To see the news release, click the # following link and search for "Daylight Savings Time Change". Press the # "Daylight Savings Time Change" link; it will fire off a popup using # JavaScript. # http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive # ... # Nunavut # An amendment to the Interpretation Act was registered on February 19/2007.... # http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf # From Paul Eggert (2006-04-25): # H. David Matthews and Mary Vincent's map # "It's about TIME", _Canadian Geographic_ (September-October 1998) # # contains detailed boundaries for regions observing nonstandard # time and daylight saving time arrangements in Canada circa 1998. # # INMS, the Institute for National Measurement Standards in Ottawa, has # information about standard and daylight saving time zones in Canada. # # (updated periodically). # Its unofficial information is often taken from Matthews and Vincent. # From Paul Eggert (2006-06-27): # For now, assume all of DST-observing Canada will fall into line with the # new US DST rules, # From Chris Walton (2011-12-01) # In the first of Tammy Hardwick's articles # http://www.ilovecreston.com/?p=articles&t=spec&ar=260 # she quotes the Friday November 1/1918 edition of the Creston Review. # The quote includes these two statements: # 'Sunday the CPR went back to the old system of time...' # '... The daylight saving scheme was dropped all over Canada at the same time,' # These statements refer to a transition from daylight time to standard time # that occurred nationally on Sunday October 27/1918. This transition was # also documented in the Saturday October 26/1918 edition of the Toronto Star. # In light of that evidence, we alter the date from the earlier believed # Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day # than Thursday) in all Canadian rulesets. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Canada 1918 only - Apr 14 2:00 1:00 D Rule Canada 1918 only - Oct 27 2:00 0 S Rule Canada 1942 only - Feb 9 2:00 1:00 W # War Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace Rule Canada 1945 only - Sep 30 2:00 0 S Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D Rule Canada 1974 2006 - Oct lastSun 2:00 0 S Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D Rule Canada 2007 max - Nov Sun>=1 2:00 0 S # Newfoundland and Labrador # From Paul Eggert (2000-10-02): # Matthews and Vincent (1998) write that Labrador should use NST/NDT, # but the only part of Labrador that follows the rules is the # southeast corner, including Port Hope Simpson and Mary's Harbour, # but excluding, say, Black Tickle. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule StJohns 1917 only - Apr 8 2:00 1:00 D Rule StJohns 1917 only - Sep 17 2:00 0 S # Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. Rule StJohns 1919 only - May 5 23:00 1:00 D Rule StJohns 1919 only - Aug 12 23:00 0 S # For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S # For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & # Pottenger. Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S # Whitman gives the following transitions: # 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 # but go with Shanks & Pottenger and assume they used Canadian rules. # For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives # Apr 30 - Sep 24; go with Shanks & Pottenger. Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S # From Paul Eggert (2000-10-02): # INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches # at 00:01 local time. For now, assume it started in 1987. # From Michael Pelley (2011-09-12): # We received today, Monday, September 12, 2011, notification that the # changes to the Newfoundland Standard Time Act have been proclaimed. # The change in the Act stipulates that the change from Daylight Savings # Time to Standard Time and from Standard Time to Daylight Savings Time # now occurs at 2:00AM. # ... # http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm # ... # MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery # Office of the Chief Information Officer # Executive Council # Government of Newfoundland & Labrador Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D Rule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D Rule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S # # St John's has an apostrophe, but Posix file names can't have apostrophes. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/St_Johns -3:30:52 - LMT 1884 -3:30:52 StJohns N%sT 1918 -3:30:52 Canada N%sT 1919 -3:30:52 StJohns N%sT 1935 Mar 30 -3:30 StJohns N%sT 1942 May 11 -3:30 Canada N%sT 1946 -3:30 StJohns N%sT 2011 Nov -3:30 Canada N%sT # most of east Labrador # The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay -3:30:52 - NST 1918 -3:30:52 Canada N%sT 1919 -3:30:52 - NST 1935 Mar 30 -3:30 - NST 1936 -3:30 StJohns N%sT 1942 May 11 -3:30 Canada N%sT 1946 -3:30 StJohns N%sT 1966 Mar 15 2:00 -4:00 StJohns A%sT 2011 Nov -4:00 Canada A%sT # west Labrador, Nova Scotia, Prince Edward I # From Paul Eggert (2006-03-22): # Shanks & Pottenger write that since 1970 most of this region has been like # Halifax. Many locales did not observe peacetime DST until 1972; # Glace Bay, NS is the largest that we know of. # Shanks & Pottenger also write that Liverpool, NS was the only town # in Canada to observe DST in 1971 but not 1970; for now we'll assume # this is a typo. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Halifax 1916 only - Apr 1 0:00 1:00 D Rule Halifax 1916 only - Oct 1 0:00 0 S Rule Halifax 1920 only - May 9 0:00 1:00 D Rule Halifax 1920 only - Aug 29 0:00 0 S Rule Halifax 1921 only - May 6 0:00 1:00 D Rule Halifax 1921 1922 - Sep 5 0:00 0 S Rule Halifax 1922 only - Apr 30 0:00 1:00 D Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D Rule Halifax 1923 only - Sep 4 0:00 0 S Rule Halifax 1924 only - Sep 15 0:00 0 S Rule Halifax 1925 only - Sep 28 0:00 0 S Rule Halifax 1926 only - May 16 0:00 1:00 D Rule Halifax 1926 only - Sep 13 0:00 0 S Rule Halifax 1927 only - May 1 0:00 1:00 D Rule Halifax 1927 only - Sep 26 0:00 0 S Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D Rule Halifax 1928 only - Sep 9 0:00 0 S Rule Halifax 1929 only - Sep 3 0:00 0 S Rule Halifax 1930 only - Sep 15 0:00 0 S Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S Rule Halifax 1932 only - May 1 0:00 1:00 D Rule Halifax 1933 only - Apr 30 0:00 1:00 D Rule Halifax 1933 only - Oct 2 0:00 0 S Rule Halifax 1934 only - May 20 0:00 1:00 D Rule Halifax 1934 only - Sep 16 0:00 0 S Rule Halifax 1935 only - Jun 2 0:00 1:00 D Rule Halifax 1935 only - Sep 30 0:00 0 S Rule Halifax 1936 only - Jun 1 0:00 1:00 D Rule Halifax 1936 only - Sep 14 0:00 0 S Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S Rule Halifax 1939 only - May 28 0:00 1:00 D Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Halifax -4:14:24 - LMT 1902 Jun 15 -4:00 Halifax A%sT 1918 -4:00 Canada A%sT 1919 -4:00 Halifax A%sT 1942 Feb 9 2:00s -4:00 Canada A%sT 1946 -4:00 Halifax A%sT 1974 -4:00 Canada A%sT Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 -4:00 Canada A%sT 1953 -4:00 Halifax A%sT 1954 -4:00 - AST 1972 -4:00 Halifax A%sT 1974 -4:00 Canada A%sT # New Brunswick # From Paul Eggert (2007-01-31): # The Time Definition Act # says they changed at 00:01 through 2006, and # makes it # clear that this was the case since at least 1993. # For now, assume it started in 1993. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S Rule Moncton 1939 only - May 27 1:00 1:00 D Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S Rule Moncton 1940 only - May 19 1:00 1:00 D Rule Moncton 1941 only - May 4 1:00 1:00 D Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Moncton -4:19:08 - LMT 1883 Dec 9 -5:00 - EST 1902 Jun 15 -4:00 Canada A%sT 1933 -4:00 Moncton A%sT 1942 -4:00 Canada A%sT 1946 -4:00 Moncton A%sT 1973 -4:00 Canada A%sT 1993 -4:00 Moncton A%sT 2007 -4:00 Canada A%sT # Quebec # From Paul Eggert (2013-08-30): # Since 1970 most of Quebec has been like Toronto. # However, because earlier versions of the tz database mistakenly relied on data # from Shanks & Pottenger saying that Quebec differed from Ontario after 1970, # a separate entry was created for most of Quebec. We're loath to lose # its pre-1970 info, even though the tz database is normally limited to # zones that differ after 1970, so keep this otherwise out-of-scope entry. # Matthews and Vincent (1998) also write that Quebec east of the -63 # meridian is supposed to observe AST, but residents as far east as # Natashquan use EST/EDT, and residents east of Natashquan use AST. # The Quebec department of justice writes in # "The situation in Minganie and Basse-Côte-Nord" # http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm # that the coastal strip from just east of Natashquan to Blanc-Sablon # observes Atlantic standard time all year round. # http://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en # says this common practice was codified into law as of 2007. # For lack of better info, guess this practice began around 1970, contra to # Shanks & Pottenger who have this region observing AST/ADT. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Mont 1917 only - Mar 25 2:00 1:00 D Rule Mont 1917 only - Apr 24 0:00 0 S Rule Mont 1919 only - Mar 31 2:30 1:00 D Rule Mont 1919 only - Oct 25 2:30 0 S Rule Mont 1920 only - May 2 2:30 1:00 D Rule Mont 1920 1922 - Oct Sun>=1 2:30 0 S Rule Mont 1921 only - May 1 2:00 1:00 D Rule Mont 1922 only - Apr 30 2:00 1:00 D Rule Mont 1924 only - May 17 2:00 1:00 D Rule Mont 1924 1926 - Sep lastSun 2:30 0 S Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D # The 1927-to-1937 rules can be expressed more simply as # Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D # Rule Mont 1927 1937 - Sep lastSat 24:00 0 S # The rules below avoid use of 24:00 # (which pre-1998 versions of zic cannot handle). Rule Mont 1927 only - May 1 0:00 1:00 D Rule Mont 1927 1932 - Sep lastSun 0:00 0 S Rule Mont 1928 1931 - Apr lastSun 0:00 1:00 D Rule Mont 1932 only - May 1 0:00 1:00 D Rule Mont 1933 1940 - Apr lastSun 0:00 1:00 D Rule Mont 1933 only - Oct 1 0:00 0 S Rule Mont 1934 1939 - Sep lastSun 0:00 0 S Rule Mont 1946 1973 - Apr lastSun 2:00 1:00 D Rule Mont 1945 1948 - Sep lastSun 2:00 0 S Rule Mont 1949 1950 - Oct lastSun 2:00 0 S Rule Mont 1951 1956 - Sep lastSun 2:00 0 S Rule Mont 1957 1973 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Blanc-Sablon -3:48:28 - LMT 1884 -4:00 Canada A%sT 1970 -4:00 - AST Zone America/Montreal -4:54:16 - LMT 1884 -5:00 Mont E%sT 1918 -5:00 Canada E%sT 1919 -5:00 Mont E%sT 1942 Feb 9 2:00s -5:00 Canada E%sT 1946 -5:00 Mont E%sT 1974 -5:00 Canada E%sT # Ontario # From Paul Eggert (2006-07-09): # Shanks & Pottenger write that since 1970 most of Ontario has been like # Toronto. # Thunder Bay skipped DST in 1973. # Many smaller locales did not observe peacetime DST until 1974; # Nipigon (EST) and Rainy River (CST) are the largest that we know of. # Far west Ontario is like Winnipeg; far east Quebec is like Halifax. # From Mark Brader (2003-07-26): # [According to the Toronto Star] Orillia, Ontario, adopted DST # effective Saturday, 1912-06-22, 22:00; the article mentions that # Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw # have already done so. In Orillia DST was to run until Saturday, # 1912-08-31 (no time mentioned), but it was met with considerable # hostility from certain segments of the public, and was revoked after # only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but # presumably that should be -07-06. (1912-06-19, -07-12; also letters # earlier in June). # # Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). # From Paul Eggert (1997-10-17): # Mark Brader writes that an article in the 1997-10-14 Toronto Star # says that Atikokan, Ontario currently does not observe DST, # but will vote on 11-10 whether to use EST/EDT. # He also writes that the Ontario Time Act (1990, Chapter T.9) # # says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. # Officially Atikokan is therefore on CST/CDT, and most likely this report # concerns a non-official time observed as a matter of local practice. # # From Paul Eggert (2000-10-02): # Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and # New Osnaburgh observe CST all year, that Big Trout Lake observes # CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in # violation of the official Ontario rules. # # From Paul Eggert (2006-07-09): # Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the # 2005-07-21 Chronicle-Journal, which said: # # The clocks in Atikokan stay set on standard time year-round. # This means they spend about half the time on central time and # the other half on eastern time. # # For the most part, the system works, Mayor Dennis Brown said. # # "The majority of businesses in Atikokan deal more with Eastern # Canada, but there are some that deal with Western Canada," he # said. "I don't see any changes happening here." # # Walton also writes "Supposedly Pickle Lake and Mishkeegogamang # [New Osnaburgh] follow the same practice." # From Garry McKinnon (2006-07-14) via Chris Walton: # I chatted with a member of my board who has an outstanding memory # and a long history in Atikokan (and in the telecom industry) and he # can say for certain that Atikokan has been practicing the current # time keeping since 1952, at least. # From Paul Eggert (2006-07-17): # Shanks & Pottenger say that Atikokan has agreed with Rainy River # ever since standard time was introduced, but the information from # McKinnon sounds more authoritative. For now, assume that Atikokan # switched to EST immediately after WWII era daylight saving time # ended. This matches the old (less-populous) America/Coral_Harbour # entry since our cutoff date of 1970, so we can move # America/Coral_Harbour to the 'backward' file. # From Mark Brader (2010-03-06): # # Currently the database has: # # # Ontario # # # From Paul Eggert (2006-07-09): # # Shanks & Pottenger write that since 1970 most of Ontario has been like # # Toronto. # # Thunder Bay skipped DST in 1973. # # Many smaller locales did not observe peacetime DST until 1974; # # Nipigon (EST) and Rainy River (CST) are the largest that we know of. # # In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom # right corner of page 1, it says that Toronto will return to standard # time at 2 am Sunday morning (which agrees with the database), and that: # # The one-hour setback will go into effect throughout most of Ontario, # except in areas like Windsor which remains on standard time all year. # # Windsor is, of course, a lot larger than Nipigon. # # I only came across this incidentally. I don't know if Windsor began # observing DST when Detroit did, or in 1974, or on some other date. # # By the way, the article continues by noting that: # # Some cities in the United States have pushed the deadline back # three weeks and will change over from daylight saving in October. # From Arthur David Olson (2010-07-17): # # "Standard Time and Time Zones in Canada" appeared in # The Journal of The Royal Astronomical Society of Canada, # volume 26, number 2 (February 1932) and, as of 2010-07-17, # was available at # http://adsabs.harvard.edu/full/1932JRASC..26...49S # # It includes the text below (starting on page 57): # # A list of the places in Canada using daylight saving time would # require yearly revision. From information kindly furnished by # the provincial governments and by the postmasters in many cities # and towns, it is found that the following places used daylight sav- # ing in 1930. The information for the province of Quebec is definite, # for the other provinces only approximate: # # Province Daylight saving time used # Prince Edward Island Not used. # Nova Scotia In Halifax only. # New Brunswick In St. John only. # Quebec In the following places: # Montreal Lachine # Quebec Mont-Royal # Lévis Iberville # St. Lambert Cap de la Madelèine # Verdun Loretteville # Westmount Richmond # Outremont St. Jérôme # Longueuil Greenfield Park # Arvida Waterloo # Chambly-Canton Beaulieu # Melbourne La Tuque # St. Théophile Buckingham # Ontario Used generally in the cities and towns along # the southerly part of the province. Not # used in the northwesterly part. # Manitoba Not used. # Saskatchewan In Regina only. # Alberta Not used. # British Columbia Not used. # # With some exceptions, the use of daylight saving may be said to be limited # to those cities and towns lying between Quebec city and Windsor, Ont. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Toronto 1919 only - Mar 30 23:30 1:00 D Rule Toronto 1919 only - Oct 26 0:00 0 S Rule Toronto 1920 only - May 2 2:00 1:00 D Rule Toronto 1920 only - Sep 26 0:00 0 S Rule Toronto 1921 only - May 15 2:00 1:00 D Rule Toronto 1921 only - Sep 15 2:00 0 S Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D # Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" # was meant. Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D # The 1927-to-1939 rules can be expressed more simply as # Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S # Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D # Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D # Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S # The rules below avoid use of Sun>=25 # (which pre-2004 versions of zic cannot handle). Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D Rule Toronto 1932 only - May 1 2:00 1:00 D Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D Rule Toronto 1933 only - Oct 1 2:00 0 S Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S Rule Toronto 1949 only - Nov lastSun 0:00 0 S Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D Rule Toronto 1950 only - Nov lastSun 2:00 0 S Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S # Shanks & Pottenger say Toronto ended DST a week early in 1971, # namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this # is wrong, and that he had confirmed it by checking the 1971-10-30 # Toronto Star, which said that DST was ending 1971-10-31 as usual. Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S # From Paul Eggert (2003-07-27): # Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and # Port Arthur, Ontario, the principle of the Bill has been in # operation for the past three years, and in the City of Moose Jaw, # Saskatchewan, for one year." # From David Bryan via Tory Tronrud, Director/Curator, # Thunder Bay Museum (2003-11-12): # There is some suggestion, however, that, by-law or not, daylight # savings time was being practiced in Fort William and Port Arthur # before 1909.... [I]n 1910, the line between the Eastern and Central # Time Zones was permanently moved about two hundred miles west to # include the Thunder Bay area.... When Canada adopted daylight # savings time in 1916, Fort William and Port Arthur, having done so # already, did not change their clocks.... During the Second World # War,... [t]he cities agreed to implement DST during the summer # months for the remainder of the war years. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Toronto -5:17:32 - LMT 1895 -5:00 Canada E%sT 1919 -5:00 Toronto E%sT 1942 Feb 9 2:00s -5:00 Canada E%sT 1946 -5:00 Toronto E%sT 1974 -5:00 Canada E%sT Zone America/Thunder_Bay -5:57:00 - LMT 1895 -6:00 - CST 1910 -5:00 - EST 1942 -5:00 Canada E%sT 1970 -5:00 Toronto E%sT 1973 -5:00 - EST 1974 -5:00 Canada E%sT Zone America/Nipigon -5:53:04 - LMT 1895 -5:00 Canada E%sT 1940 Sep 29 -5:00 1:00 EDT 1942 Feb 9 2:00s -5:00 Canada E%sT Zone America/Rainy_River -6:18:16 - LMT 1895 -6:00 Canada C%sT 1940 Sep 29 -6:00 1:00 CDT 1942 Feb 9 2:00s -6:00 Canada C%sT Zone America/Atikokan -6:06:28 - LMT 1895 -6:00 Canada C%sT 1940 Sep 29 -6:00 1:00 CDT 1942 Feb 9 2:00s -6:00 Canada C%sT 1945 Sep 30 2:00 -5:00 - EST # Manitoba # From Rob Douglas (2006-04-06): # the old Manitoba Time Act - as amended by Bill 2, assented to # March 27, 1987 ... said ... # "between two o'clock Central Standard Time in the morning of # the first Sunday of April of each year and two o'clock Central # Standard Time in the morning of the last Sunday of October next # following, one hour in advance of Central Standard Time."... # I believe that the English legislation [of the old time act] had # been assented to (March 22, 1967).... # Also, as far as I can tell, there was no order-in-council varying # the time of Daylight Saving Time for 2005 and so the provisions of # the 1987 version would apply - the changeover was at 2:00 Central # Standard Time (i.e. not until 3:00 Central Daylight Time). # From Paul Eggert (2006-04-10): # Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) # starting 1966. Since 02:00s is clearly correct for 1967 on, assume # it was also 02:00s in 1966. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Winn 1916 only - Apr 23 0:00 1:00 D Rule Winn 1916 only - Sep 17 0:00 0 S Rule Winn 1918 only - Apr 14 2:00 1:00 D Rule Winn 1918 only - Oct 27 2:00 0 S Rule Winn 1937 only - May 16 2:00 1:00 D Rule Winn 1937 only - Sep 26 2:00 0 S Rule Winn 1942 only - Feb 9 2:00 1:00 W # War Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace Rule Winn 1945 only - Sep lastSun 2:00 0 S Rule Winn 1946 only - May 12 2:00 1:00 D Rule Winn 1946 only - Oct 13 2:00 0 S Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D Rule Winn 1947 1949 - Sep lastSun 2:00 0 S Rule Winn 1950 only - May 1 2:00 1:00 D Rule Winn 1950 only - Sep 30 2:00 0 S Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D Rule Winn 1951 1958 - Sep lastSun 2:00 0 S Rule Winn 1959 only - Oct lastSun 2:00 0 S Rule Winn 1960 only - Sep lastSun 2:00 0 S Rule Winn 1963 only - Apr lastSun 2:00 1:00 D Rule Winn 1963 only - Sep 22 2:00 0 S Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 -6:00 Winn C%sT 2006 -6:00 Canada C%sT # Saskatchewan # From Mark Brader (2003-07-26): # The first actual adoption of DST in Canada was at the municipal # level. As the [Toronto] Star put it (1912-06-07), "While people # elsewhere have long been talking of legislation to save daylight, # the city of Moose Jaw [Saskatchewan] has acted on its own hook." # DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: # presumably late evening, as below), and would run until "the end of # the summer". The discrepancy between municipal time and railroad # time was noted. # From Paul Eggert (2003-07-27): # Willett (1914-03) notes that DST "has been in operation ... in the # City of Moose Jaw, Saskatchewan, for one year." # From Paul Eggert (2006-03-22): # Shanks & Pottenger say that since 1970 this region has mostly been as Regina. # Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. # Other western towns (e.g. Lloydminster) are like Edmonton. # Matthews and Vincent (1998) write that Denare Beach and Creighton # are like Winnipeg, in violation of Saskatchewan law. # From W. Jones (1992-11-06): # The. . .below is based on information I got from our law library, the # provincial archives, and the provincial Community Services department. # A precise history would require digging through newspaper archives, and # since you didn't say what you wanted, I didn't bother. # # Saskatchewan is split by a time zone meridian (105W) and over the years # the boundary became pretty ragged as communities near it reevaluated # their affiliations in one direction or the other. In 1965 a provincial # referendum favoured legislating common time practices. # # On 15 April 1966 the Time Act (c. T-14, Revised Statutes of # Saskatchewan 1978) was proclaimed, and established that the eastern # part of Saskatchewan would use CST year round, that districts in # northwest Saskatchewan would by default follow CST but could opt to # follow Mountain Time rules (thus 1 hour difference in the winter and # zero in the summer), and that districts in southwest Saskatchewan would # by default follow MT but could opt to follow CST. # # It took a few years for the dust to settle (I know one story of a town # on one time zone having its school in another, such that a mom had to # serve her family lunch in two shifts), but presently it seems that only # a few towns on the border with Alberta (e.g. Lloydminster) follow MT # rules any more; all other districts appear to have used CST year round # since sometime in the 1960s. # From Chris Walton (2006-06-26): # The Saskatchewan time act which was last updated in 1996 is about 30 pages # long and rather painful to read. # http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Regina 1918 only - Apr 14 2:00 1:00 D Rule Regina 1918 only - Oct 27 2:00 0 S Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D Rule Regina 1937 only - Oct Sun>=8 0:00 0 S Rule Regina 1938 only - Oct Sun>=1 0:00 0 S Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S Rule Regina 1942 only - Feb 9 2:00 1:00 W # War Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace Rule Regina 1945 only - Sep lastSun 2:00 0 S Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D Rule Regina 1946 only - Oct Sun>=8 2:00 0 S Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D Rule Regina 1947 1957 - Sep lastSun 2:00 0 S Rule Regina 1959 only - Apr lastSun 2:00 1:00 D Rule Regina 1959 only - Oct lastSun 2:00 0 S # Rule Swift 1957 only - Apr lastSun 2:00 1:00 D Rule Swift 1957 only - Oct lastSun 2:00 0 S Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D Rule Swift 1959 only - Oct lastSun 2:00 0 S Rule Swift 1960 1961 - Sep lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Regina -6:58:36 - LMT 1905 Sep -7:00 Regina M%sT 1960 Apr lastSun 2:00 -6:00 - CST Zone America/Swift_Current -7:11:20 - LMT 1905 Sep -7:00 Canada M%sT 1946 Apr lastSun 2:00 -7:00 Regina M%sT 1950 -7:00 Swift M%sT 1972 Apr lastSun 2:00 -6:00 - CST # Alberta # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D Rule Edm 1918 only - Oct 27 2:00 0 S Rule Edm 1919 only - May 27 2:00 0 S Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D Rule Edm 1920 only - Oct lastSun 2:00 0 S Rule Edm 1921 1923 - Sep lastSun 2:00 0 S Rule Edm 1942 only - Feb 9 2:00 1:00 W # War Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace Rule Edm 1945 only - Sep lastSun 2:00 0 S Rule Edm 1947 only - Apr lastSun 2:00 1:00 D Rule Edm 1947 only - Sep lastSun 2:00 0 S Rule Edm 1967 only - Apr lastSun 2:00 1:00 D Rule Edm 1967 only - Oct lastSun 2:00 0 S Rule Edm 1969 only - Apr lastSun 2:00 1:00 D Rule Edm 1969 only - Oct lastSun 2:00 0 S Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D Rule Edm 1972 2006 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Edmonton -7:33:52 - LMT 1906 Sep -7:00 Edm M%sT 1987 -7:00 Canada M%sT # British Columbia # From Paul Eggert (2006-03-22): # Shanks & Pottenger write that since 1970 most of this region has # been like Vancouver. # Dawson Creek uses MST. Much of east BC is like Edmonton. # Matthews and Vincent (1998) write that Creston is like Dawson Creek. # It seems though that (re: Creston) is not entirely correct: # From Chris Walton (2011-12-01): # There are two areas within the Canadian province of British Columbia # that do not currently observe daylight saving: # a) The Creston Valley (includes the town of Creston and surrounding area) # b) The eastern half of the Peace River Regional District # (includes the cities of Dawson Creek and Fort St. John) # Earlier this year I stumbled across a detailed article about the time # keeping history of Creston; it was written by Tammy Hardwick who is the # manager of the Creston & District Museum. The article was written in May 2009. # http://www.ilovecreston.com/?p=articles&t=spec&ar=260 # According to the article, Creston has not changed its clocks since June 1918. # i.e. Creston has been stuck on UTC-7 for 93 years. # Dawson Creek, on the other hand, changed its clocks as recently as April 1972. # Unfortunately the exact date for the time change in June 1918 remains # unknown and will be difficult to ascertain. I e-mailed Tammy a few months # ago to ask if Sunday June 2 was a reasonable guess. She said it was just # as plausible as any other date (in June). She also said that after writing the # article she had discovered another time change in 1916; this is the subject # of another article which she wrote in October 2010. # http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56 # Here is a summary of the three clock change events in Creston's history: # 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7) # Exact date unknown # 2. Oct 1916: switch to Pacific Standard Time (GMT-8) # Exact date in October unknown; Sunday October 1 is a reasonable guess. # 3. June 1918: switch to Pacific Daylight Time (GMT-7) # Exact date in June unknown; Sunday June 2 is a reasonable guess. # note#1: # On Oct 27/1918 when daylight saving ended in the rest of Canada, # Creston did not change its clocks. # note#2: # During WWII when the Federal Government legislated a mandatory clock change, # Creston did not oblige. # note#3: # There is no guarantee that Creston will remain on Mountain Standard Time # (UTC-7) forever. # The subject was debated at least once this year by the town Council. # http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html # During a period WWII, summer time (Daylight saying) was mandatory in Canada. # In Creston, that was handled by shifting the area to PST (-8:00) then applying # summer time to cause the offset to be -7:00, the same as it had been before # the change. It can be argued that the timezone abbreviation during this # period should be PDT rather than MST, but that doesn't seem important enough # (to anyone) to further complicate the rules. # The transition dates (and times) are guesses. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Vanc 1918 only - Apr 14 2:00 1:00 D Rule Vanc 1918 only - Oct 27 2:00 0 S Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace Rule Vanc 1945 only - Sep 30 2:00 0 S Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D Rule Vanc 1946 only - Oct 13 2:00 0 S Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Vancouver -8:12:28 - LMT 1884 -8:00 Vanc P%sT 1987 -8:00 Canada P%sT Zone America/Dawson_Creek -8:00:56 - LMT 1884 -8:00 Canada P%sT 1947 -8:00 Vanc P%sT 1972 Aug 30 2:00 -7:00 - MST Zone America/Creston -7:46:04 - LMT 1884 -7:00 - MST 1916 Oct 1 -8:00 - PST 1918 Jun 2 -7:00 - MST # Northwest Territories, Nunavut, Yukon # From Paul Eggert (2006-03-22): # Dawson switched to PST in 1973. Inuvik switched to MST in 1979. # Mathew Englander (1996-10-07) gives the following refs: # * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, # c. 7 defines Yukon standard time as UTC-9. This is still valid; # see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). # * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. # * O.I.C. 1980/02 established DST. # * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. # Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go # with Englander. # From Chris Walton (2006-06-26): # Here is a link to the old daylight saving portion of the interpretation # act which was last updated in 1987: # http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf # From Rives McDow (1999-09-04): # Nunavut ... moved ... to incorporate the whole territory into one time zone. # Nunavut moves to single time zone Oct. 31 # # # From Antoine Leca (1999-09-06): # We then need to create a new timezone for the Kitikmeot region of Nunavut # to differentiate it from the Yellowknife region. # From Paul Eggert (1999-09-20): # Basic Facts: The New Territory # # (1999) reports that Pangnirtung operates on eastern time, # and that Coral Harbour does not observe DST. We don't know when # Pangnirtung switched to eastern time; we'll guess 1995. # From Rives McDow (1999-11-08): # On October 31, when the rest of Nunavut went to Central time, # Pangnirtung wobbled. Here is the result of their wobble: # # The following businesses and organizations in Pangnirtung use Central Time: # # First Air, Power Corp, Nunavut Construction, Health Center, RCMP, # Eastern Arctic National Parks, A & D Specialist # # The following businesses and organizations in Pangnirtung use Eastern Time: # # Hamlet office, All other businesses, Both schools, Airport operator # # This has made for an interesting situation there, which warranted the news. # No one there that I spoke with seems concerned, or has plans to # change the local methods of keeping time, as it evidently does not # really interfere with any activities or make things difficult locally. # They plan to celebrate New Year's turn-over twice, one hour apart, # so it appears that the situation will last at least that long. # The Nunavut Intergovernmental Affairs hopes that they will "come to # their senses", but the locals evidently don't see any problem with # the current state of affairs. # From Michaela Rodrigue, writing in the # Nunatsiaq News (1999-11-19) # : # Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, # central - or Nunavut time - for government offices, and eastern time # for municipal offices and schools.... Igloolik [was similar but then] # made the switch to central time on Saturday, Nov. 6. # From Paul Eggert (2000-10-02): # Matthews and Vincent (1998) say the following, but we lack histories # for these potential new Zones. # # The Canadian Forces station at Alert uses Eastern Time while the # handful of residents at the Eureka weather station [in the Central # zone] skip daylight savings. Baffin Island, which is crossed by the # Central, Eastern and Atlantic Time zones only uses Eastern Time. # Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of # Central Time and Southampton Island [in the Central zone] is not # required to use daylight savings. # From # Nunavut now has two time zones (2000-11-10): # The Nunavut government would allow its employees in Kugluktuk and # Cambridge Bay to operate on central time year-round, putting them # one hour behind the rest of Nunavut for six months during the winter. # At the end of October the two communities had rebelled against # Nunavut's unified time zone, refusing to shift to eastern time with # the rest of the territory for the winter. Cambridge Bay remained on # central time, while Kugluktuk, even farther west, reverted to # mountain time, which they had used before the advent of Nunavut's # unified time zone in 1999. # # From Rives McDow (2001-01-20), quoting the Nunavut government: # The preceding decision came into effect at midnight, Saturday Nov 4, 2000. # From Paul Eggert (2000-12-04): # Let's just keep track of the official times for now. # From Rives McDow (2001-03-07): # The premier of Nunavut has issued a ministerial statement advising # that effective 2001-04-01, the territory of Nunavut will revert # back to three time zones (mountain, central, and eastern). Of the # cities in Nunavut, Coral Harbor is the only one that I know of that # has said it will not observe dst, staying on EST year round. I'm # checking for more info, and will get back to you if I come up with # more. # [Also see (2001-03-09).] # From Gwillim Law (2005-05-21): # According to maps at # http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg # http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg # (both dated 2003), and # http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp # (from a 1998 Canadian Geographic article), the de facto and de jure time # for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year # round. Using Google, it's easy to find other websites that confirm this. # I wasn't able to find how far back this time regimen goes, but since it # predates the creation of Nunavut, it probably goes back many years.... # The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. # # From Paul Eggert (2005-07-26): # For lack of better information, assume that Southampton Island observed # daylight saving only during wartime. # From Chris Walton (2007-03-01): # ... the community of Resolute (located on Cornwallis Island in # Nunavut) moved from Central Time to Eastern Time last November. # Basically the community did not change its clocks at the end of # daylight saving.... # http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html # From Chris Walton (2011-03-21): # Back in 2007 I initiated the creation of a new "zone file" for Resolute # Bay. Resolute Bay is a small community located about 900km north of # the Arctic Circle. The zone file was required because Resolute Bay had # decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007. # # According to new information which I received last week, Resolute Bay # went back to using UTC-6 in the winter of 2007-2008... # # On March 11/2007 most of Canada went onto daylight saving. On March # 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I # talked to somebody that was both knowledgeable and helpful. I was able # to confirm that Resolute Bay was still operating on UTC-5. It was # explained to me that Resolute Bay had been on the Eastern Time zone # (EST) in the winter, and was now back on the Central Time zone (CDT). # i.e. the time zone had changed twice in the last year but the clocks # had not moved. The residents had to know which time zone they were in # so they could follow the correct TV schedule... # # On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I # phoned the Resolute Bay hamlet office...[D]ue to the challenging nature # of the phone call, I decided to seek out an alternate source of # information. I found an e-mail address for somebody by the name of # Stephanie Adams whose job was listed as "Inns North Support Officer for # Arctic Co-operatives." I was under the impression that Stephanie lived # and worked in Resolute Bay... # # On March 14/2011 I phoned the hamlet office again. I was told that # Resolute Bay had been using Central Standard Time over the winter of # 2010-2011 and that the clocks had therefore been moved one hour ahead # on March 13/2011. The person I talked to was aware that Resolute Bay # had previously experimented with Eastern Standard Time but he could not # tell me when the practice had stopped. # # On March 17/2011 I searched the Web to find an e-mail address of # somebody that might be able to tell me exactly when Resolute Bay went # off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz # used to be the mayor of Resolute Bay and he apparently owns half the # businesses including "South Camp Inn." This website has some info on # Aziz: # http://www.uphere.ca/node/493 # # I sent Aziz an e-mail asking when Resolute Bay had stopped using # Eastern Standard Time. # # Aziz responded quickly with this: "hi, The time was not changed for the # 1 year only, the following year, the community went back to the old way # of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in # the winter Zulu plus 6 hrs" # # This of course conflicted with everything I had ascertained in November 2008. # # I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz # responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You # may want to check with the weather office in Resolute Bay or do a # search on the weather through Env. Canada. web site" # # If I had realized the Stephanie did not live in Resolute Bay I would # never have contacted her. I now believe that all the information I # obtained in November 2008 should be ignored... # I apologize for reporting incorrect information in 2008. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule NT_YK 1918 only - Apr 14 2:00 1:00 D Rule NT_YK 1918 only - Oct 27 2:00 0 S Rule NT_YK 1919 only - May 25 2:00 1:00 D Rule NT_YK 1919 only - Nov 1 0:00 0 S Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace Rule NT_YK 1945 only - Sep 30 2:00 0 S Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD Rule NT_YK 1965 only - Oct lastSun 2:00 0 S Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D # Zone NAME GMTOFF RULES FORMAT [UNTIL] # aka Panniqtuuq Zone America/Pangnirtung 0 - zzz 1921 # trading post est. -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 -5:00 Canada E%sT 1999 Oct 31 2:00 -6:00 Canada C%sT 2000 Oct 29 2:00 -5:00 Canada E%sT # formerly Frobisher Bay Zone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est. -5:00 NT_YK E%sT 1999 Oct 31 2:00 -6:00 Canada C%sT 2000 Oct 29 2:00 -5:00 Canada E%sT # aka Qausuittuq Zone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded -6:00 NT_YK C%sT 2000 Oct 29 2:00 -5:00 - EST 2001 Apr 1 3:00 -6:00 Canada C%sT 2006 Oct 29 2:00 -5:00 - EST 2007 Mar 11 3:00 -6:00 Canada C%sT # aka Kangiqiniq Zone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded -6:00 NT_YK C%sT 2000 Oct 29 2:00 -5:00 - EST 2001 Apr 1 3:00 -6:00 Canada C%sT # aka Iqaluktuuttiaq Zone America/Cambridge_Bay 0 - zzz 1920 # trading post est.? -7:00 NT_YK M%sT 1999 Oct 31 2:00 -6:00 Canada C%sT 2000 Oct 29 2:00 -5:00 - EST 2000 Nov 5 0:00 -6:00 - CST 2001 Apr 1 3:00 -7:00 Canada M%sT Zone America/Yellowknife 0 - zzz 1935 # Yellowknife founded? -7:00 NT_YK M%sT 1980 -7:00 Canada M%sT Zone America/Inuvik 0 - zzz 1953 # Inuvik founded -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 -7:00 NT_YK M%sT 1980 -7:00 Canada M%sT Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 -9:00 NT_YK Y%sT 1966 Jul 1 2:00 -8:00 NT_YK P%sT 1980 -8:00 Canada P%sT Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 -9:00 NT_YK Y%sT 1973 Oct 28 0:00 -8:00 NT_YK P%sT 1980 -8:00 Canada P%sT ############################################################################### # Mexico # From Paul Eggert (2001-03-05): # The Investigation and Analysis Service of the # Mexican Library of Congress (MLoC) has published a # history of Mexican local time (in Spanish) # . # # Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. # (In all cases we go with the MLoC.) # S&P report that Baja was at -8:00 in 1922/1923. # S&P say the 1930 transition in Baja was 1930-11-16. # S&P report no DST during summer 1931. # S&P report a transition at 1932-03-30 23:00, not 1932-04-01. # From Gwillim Law (2001-02-20): # There are some other discrepancies between the Decrees page and the # tz database. I think they can best be explained by supposing that # the researchers who prepared the Decrees page failed to find some of # the relevant documents. # From Alan Perry (1996-02-15): # A guy from our Mexico subsidiary finally found the Presidential Decree # outlining the timezone changes in Mexico. # # ------------- Begin Forwarded Message ------------- # # I finally got my hands on the Official Presidential Decree that sets up the # rules for the DST changes. The rules are: # # 1. The country is divided in 3 timezones: # - Baja California Norte (the Mexico/BajaNorte TZ) # - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) # - The rest of the country (the Mexico/General TZ) # # 2. From the first Sunday in April at 2:00 AM to the last Sunday in October # at 2:00 AM, the times in each zone are as follows: # BajaNorte: GMT+7 # BajaSur: GMT+6 # General: GMT+5 # # 3. The rest of the year, the times are as follows: # BajaNorte: GMT+8 # BajaSur: GMT+7 # General: GMT+6 # # The Decree was published in Mexico's Official Newspaper on January 4th. # # -------------- End Forwarded Message -------------- # From Paul Eggert (1996-06-12): # For an English translation of the decree, see # "Diario Oficial: Time Zone Changeover" (1996-01-04) # . # From Rives McDow (1998-10-08): # The State of Quintana Roo has reverted back to central STD and DST times # (i.e. UTC -0600 and -0500 as of 1998-08-02). # From Rives McDow (2000-01-10): # Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time # zone 5 hours from the International Date Line, and will not observe daylight # savings time so as to stay on the same time zone as the southern part of # Arizona year round. # From Jesper Nørgaard, translating # (2001-01-17): # In Oaxaca, the 55.000 teachers from the Section 22 of the National # Syndicate of Education Workers, refuse to apply daylight saving each # year, so that the more than 10,000 schools work at normal hour the # whole year. # From Gwillim Law (2001-01-19): # ... says # (translated):... # January 17, 2000 - The Energy Secretary, Ernesto Martens, announced # that Summer Time will be reduced from seven to five months, starting # this year.... # # [translated], says "summer time will ... take effect on the first Sunday # in May, and end on the last Sunday of September. # From Arthur David Olson (2001-01-25): # The 2001-01-24 traditional Washington Post contained the page one # story "Timely Issue Divides Mexicans."... # http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html # ... Mexico City Mayor López Obrador "...is threatening to keep # Mexico City and its 20 million residents on a different time than # the rest of the country..." In particular, López Obrador would abolish # observation of Daylight Saving Time. # Official statute published by the Energy Department # # (2001-02-01) shows Baja and Chihauhua as still using US DST rules, # and Sonora with no DST. This was reported by Jesper Nørgaard (2001-02-03). # From Paul Eggert (2001-03-03): # # # James F. Smith writes in today's LA Times # * Sonora will continue to observe standard time. # * Last week Mexico City's mayor Andrés Manuel López Obrador decreed that # the Federal District will not adopt DST. # * 4 of 16 district leaders announced they'll ignore the decree. # * The decree does not affect federal-controlled facilities including # the airport, banks, hospitals, and schools. # # For now we'll assume that the Federal District will bow to federal rules. # From Jesper Nørgaard (2001-04-01): # I found some references to the Mexican application of daylight # saving, which modifies what I had already sent you, stating earlier # that a number of northern Mexican states would go on daylight # saving. The modification reverts this to only cover Baja California # (Norte), while all other states (except Sonora, who has no daylight # saving all year) will follow the original decree of president # Vicente Fox, starting daylight saving May 6, 2001 and ending # September 30, 2001. # References: "Diario de Monterrey" # Palabra (2001-03-31) # From Reuters (2001-09-04): # Mexico's Supreme Court on Tuesday declared that daylight savings was # unconstitutional in Mexico City, creating the possibility the # capital will be in a different time zone from the rest of the nation # next year.... The Supreme Court's ruling takes effect at 2:00 # a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to # standard time. "This is so residents of the Federal District are not # subject to unexpected time changes," a statement from the court said. # From Jesper Nørgaard Welen (2002-03-12): # ... consulting my local grocery store(!) and my coworkers, they all insisted # that a new decision had been made to reinstate US style DST in Mexico.... # http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) # confirms this. Sonora as usual is the only state where DST is not applied. # From Steffen Thorsen (2009-12-28): # # Steffen Thorsen wrote: # > Mexico's House of Representatives has approved a proposal for northern # > Mexico's border cities to share the same daylight saving schedule as # > the United States. # Now this has passed both the Congress and the Senate, so starting from # 2010, some border regions will be the same: # http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ # http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 # (Spanish) # # Could not find the new law text, but the proposed law text changes are here: # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf # (Gaceta Parlamentaria) # # There is also a list of the votes here: # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html # # Our page: # http://www.timeanddate.com/news/time/north-mexico-dst-change.html # From Arthur David Olson (2010-01-20): # The page # http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 # includes this text: # En los municipios fronterizos de Tijuana y Mexicali en Baja California; # Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila; # Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en # Tamaulipas, la aplicación de este horario estacional surtirá efecto # desde las dos horas del segundo domingo de marzo y concluirá a las dos # horas del primer domingo de noviembre. # En los municipios fronterizos que se encuentren ubicados en la franja # fronteriza norte en el territorio comprendido entre la línea # internacional y la línea paralela ubicada a una distancia de veinte # kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el # interior del país, la aplicación de este horario estacional surtirá # efecto desde las dos horas del segundo domingo de marzo y concluirá a # las dos horas del primer domingo de noviembre. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Mexico 1939 only - Feb 5 0:00 1:00 D Rule Mexico 1939 only - Jun 25 0:00 0 S Rule Mexico 1940 only - Dec 9 0:00 1:00 D Rule Mexico 1941 only - Apr 1 0:00 0 S Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War Rule Mexico 1944 only - May 1 0:00 0 S Rule Mexico 1950 only - Feb 12 0:00 1:00 D Rule Mexico 1950 only - Jul 30 0:00 0 S Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D Rule Mexico 2001 only - Sep lastSun 2:00 0 S Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D Rule Mexico 2002 max - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] # Quintana Roo; represented by Cancún Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 -6:00 - CST 1981 Dec 23 -5:00 Mexico E%sT 1998 Aug 2 2:00 -6:00 Mexico C%sT # Campeche, Yucatán; represented by Mérida Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 -6:00 - CST 1981 Dec 23 -5:00 - EST 1982 Dec 2 -6:00 Mexico C%sT # Coahuila, Durango, Nuevo León, Tamaulipas (near US border) Zone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 -6:00 - CST 1988 -6:00 US C%sT 1989 -6:00 Mexico C%sT 2010 -6:00 US C%sT # Coahuila, Durango, Nuevo León, Tamaulipas (away from US border) Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 -6:00 - CST 1988 -6:00 US C%sT 1989 -6:00 Mexico C%sT # Central Mexico Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 -7:00 - MST 1927 Jun 10 23:00 -6:00 - CST 1930 Nov 15 -7:00 - MST 1931 May 1 23:00 -6:00 - CST 1931 Oct -7:00 - MST 1932 Apr 1 -6:00 Mexico C%sT 2001 Sep 30 02:00 -6:00 - CST 2002 Feb 20 -6:00 Mexico C%sT # Chihuahua (near US border) Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 -7:00 - MST 1927 Jun 10 23:00 -6:00 - CST 1930 Nov 15 -7:00 - MST 1931 May 1 23:00 -6:00 - CST 1931 Oct -7:00 - MST 1932 Apr 1 -6:00 - CST 1996 -6:00 Mexico C%sT 1998 -6:00 - CST 1998 Apr Sun>=1 3:00 -7:00 Mexico M%sT 2010 -7:00 US M%sT # Chihuahua (away from US border) Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 -7:00 - MST 1927 Jun 10 23:00 -6:00 - CST 1930 Nov 15 -7:00 - MST 1931 May 1 23:00 -6:00 - CST 1931 Oct -7:00 - MST 1932 Apr 1 -6:00 - CST 1996 -6:00 Mexico C%sT 1998 -6:00 - CST 1998 Apr Sun>=1 3:00 -7:00 Mexico M%sT # Sonora Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 -7:00 - MST 1927 Jun 10 23:00 -6:00 - CST 1930 Nov 15 -7:00 - MST 1931 May 1 23:00 -6:00 - CST 1931 Oct -7:00 - MST 1932 Apr 1 -6:00 - CST 1942 Apr 24 -7:00 - MST 1949 Jan 14 -8:00 - PST 1970 -7:00 Mexico M%sT 1999 -7:00 - MST # From Alexander Krivenyshev (2010-04-21): # According to news, Bahía de Banderas (Mexican state of Nayarit) # changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to # share the same time zone as nearby city Puerto Vallarta, Jalisco). # # (Spanish) # Bahía de Banderas homologa su horario al del centro del # país, a partir de este domingo # http://www.nayarit.gob.mx/notes.asp?id=20748 # # Bahía de Banderas homologa su horario con el del Centro del # País # http://www.bahiadebanderas.gob.mx/principal/index.php?option=com_content&view=article&id=261:bahia-de-banderas-homologa-su-horario-con-el-del-centro-del-pais&catid=42:comunicacion-social&Itemid=50 # # (English) # Puerto Vallarta and Bahía de Banderas: One Time Zone # http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml # http://www.worldtimezone.com/dst_news/dst_news_mexico08.html # # "Mexico's Senate approved the amendments to the Mexican Schedule System that # will allow Bahía de Banderas and Puerto Vallarta to share the same time # zone ..." # Baja California Sur, Nayarit, Sinaloa # From Arthur David Olson (2010-05-01): # Use "Bahia_Banderas" to keep the name to fourteen characters. # Mazatlán Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 -7:00 - MST 1927 Jun 10 23:00 -6:00 - CST 1930 Nov 15 -7:00 - MST 1931 May 1 23:00 -6:00 - CST 1931 Oct -7:00 - MST 1932 Apr 1 -6:00 - CST 1942 Apr 24 -7:00 - MST 1949 Jan 14 -8:00 - PST 1970 -7:00 Mexico M%sT # Bahía de Banderas Zone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00 -7:00 - MST 1927 Jun 10 23:00 -6:00 - CST 1930 Nov 15 -7:00 - MST 1931 May 1 23:00 -6:00 - CST 1931 Oct -7:00 - MST 1932 Apr 1 -6:00 - CST 1942 Apr 24 -7:00 - MST 1949 Jan 14 -8:00 - PST 1970 -7:00 Mexico M%sT 2010 Apr 4 2:00 -6:00 Mexico C%sT # Baja California (near US border) Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 -7:00 - MST 1924 -8:00 - PST 1927 Jun 10 23:00 -7:00 - MST 1930 Nov 15 -8:00 - PST 1931 Apr 1 -8:00 1:00 PDT 1931 Sep 30 -8:00 - PST 1942 Apr 24 -8:00 1:00 PWT 1945 Aug 14 23:00u -8:00 1:00 PPT 1945 Nov 12 # Peace -8:00 - PST 1948 Apr 5 -8:00 1:00 PDT 1949 Jan 14 -8:00 - PST 1954 -8:00 CA P%sT 1961 -8:00 - PST 1976 -8:00 US P%sT 1996 -8:00 Mexico P%sT 2001 -8:00 US P%sT 2002 Feb 20 -8:00 Mexico P%sT 2010 -8:00 US P%sT # Baja California (away from US border) Zone America/Santa_Isabel -7:39:28 - LMT 1922 Jan 1 0:20:32 -7:00 - MST 1924 -8:00 - PST 1927 Jun 10 23:00 -7:00 - MST 1930 Nov 15 -8:00 - PST 1931 Apr 1 -8:00 1:00 PDT 1931 Sep 30 -8:00 - PST 1942 Apr 24 -8:00 1:00 PWT 1945 Aug 14 23:00u -8:00 1:00 PPT 1945 Nov 12 # Peace -8:00 - PST 1948 Apr 5 -8:00 1:00 PDT 1949 Jan 14 -8:00 - PST 1954 -8:00 CA P%sT 1961 -8:00 - PST 1976 -8:00 US P%sT 1996 -8:00 Mexico P%sT 2001 -8:00 US P%sT 2002 Feb 20 -8:00 Mexico P%sT # From Paul Eggert (2006-03-22): # Formerly there was an America/Ensenada zone, which differed from # America/Tijuana only in that it did not observe DST from 1976 # through 1995. This was as per Shanks (1999). But Shanks & Pottenger say # Ensenada did not observe DST from 1948 through 1975. Guy Harris reports # that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and # Tijuana observe DST," which agrees with Shanks & Pottenger but implies that # DST-observance was a town-by-town matter back then. This concerns # data after 1970 so most likely there should be at least one Zone # other than America/Tijuana for Baja, but it's not clear yet what its # name or contents should be. # # Revillagigedo Is # no information ############################################################################### # Anguilla # See America/Port_of_Spain. # Antigua and Barbuda # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Antigua -4:07:12 - LMT 1912 Mar 2 -5:00 - EST 1951 -4:00 - AST # Bahamas # # For 1899 Milne gives -5:09:29.5; round that. # # From Sue Williams (2006-12-07): # The Bahamas announced about a month ago that they plan to change their DST # rules to sync with the U.S. starting in 2007.... # http://www.jonesbahamas.com/?c=45&a=10412 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Nassau -5:09:30 - LMT 1912 Mar 2 -5:00 Bahamas E%sT 1976 -5:00 US E%sT # Barbados # For 1899 Milne gives -3:58:29.2; round that. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Barb 1977 only - Jun 12 2:00 1:00 D Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D Rule Barb 1979 only - Sep 30 2:00 0 S Rule Barb 1980 only - Sep 25 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Barbados -3:58:29 - LMT 1924 # Bridgetown -3:58:29 - BMT 1932 # Bridgetown Mean Time -4:00 Barb A%sT # Belize # Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S Rule Belize 1973 only - Dec 5 0:00 1:00 D Rule Belize 1974 only - Feb 9 0:00 0 S Rule Belize 1982 only - Dec 18 0:00 1:00 D Rule Belize 1983 only - Feb 12 0:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Belize -5:52:48 - LMT 1912 Apr -6:00 Belize C%sT # Bermuda # For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower, # Bermuda dockyard, Ireland I; round that. # From Dan Jones, reporting in The Royal Gazette (2006-06-26): # Next year, however, clocks in the US will go forward on the second Sunday # in March, until the first Sunday in November. And, after the Time Zone # (Seasonal Variation) Bill 2006 was passed in the House of Assembly on # Friday, the same thing will happen in Bermuda. # http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton -4:00 - AST 1974 Apr 28 2:00 -4:00 Canada A%sT 1976 -4:00 US A%sT # Cayman Is # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown -5:07:11 - KMT 1912 Feb # Kingston Mean Time -5:00 - EST # Costa Rica # Milne gives -5:36:13.3 as San José mean time; round to nearest. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D # IATA SSIM (1991-09) says the following was at 1:00; # go with Shanks & Pottenger. Rule CR 1991 only - Jul 1 0:00 0 S Rule CR 1992 only - Mar 15 0:00 0 S # There are too many San Josés elsewhere, so we'll use 'Costa Rica'. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Costa_Rica -5:36:13 - LMT 1890 # San José -5:36:13 - SJMT 1921 Jan 15 # San José Mean Time -6:00 CR C%sT # Coco # no information; probably like America/Costa_Rica # Cuba # From Paul Eggert (2013-02-21): # Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57 # for the port, and -5:30 for meteorological observations. # For now, stick with Shanks & Pottenger. # From Arthur David Olson (1999-03-29): # The 1999-03-28 exhibition baseball game held in Havana, Cuba, between # the Cuban National Team and the Baltimore Orioles was carried live on # the Orioles Radio Network, including affiliate WTOP in Washington, DC. # During the game, play-by-play announcer Jim Hunter noted that # "We'll be losing two hours of sleep...Cuba switched to Daylight Saving # Time today." (The "two hour" remark referred to losing one hour of # sleep on 1999-03-28 - when the announcers were in Cuba as it switched # to DST - and one more hour on 1999-04-04 - when the announcers will have # returned to Baltimore, which switches on that date.) # From Steffen Thorsen (2013-11-11): # DST start in Cuba in 2004 ... does not follow the same rules as the # years before. The correct date should be Sunday 2004-03-28 00:00 ... # https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html # From Evert van der Veer via Steffen Thorsen (2004-10-28): # Cuba is not going back to standard time this year. # From Paul Eggert (2006-03-22): # http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html # says that it's due to a problem at the Antonio Guiteras # thermoelectric plant, and says "This October there will be no return # to normal hours (after daylight saving time)". # For now, let's assume that it's a temporary measure. # From Carlos A. Carnero Delgado (2005-11-12): # This year (just like in 2004-2005) there's no change in time zone # adjustment in Cuba. We will stay in daylight saving time: # http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html # From Jesper Nørgaard Welen (2006-10-21): # An article in GRANMA INTERNACIONAL claims that Cuba will end # the 3 years of permanent DST next weekend, see # http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html # "On Saturday night, October 28 going into Sunday, October 29, at 01:00, # watches should be set back one hour - going back to 00:00 hours - returning # to the normal schedule.... # From Paul Eggert (2007-03-02): # , dated yesterday, # says Cuban clocks will advance at midnight on March 10. # For lack of better information, assume Cuba will use US rules, # except that it switches at midnight standard time as usual. # # From Steffen Thorsen (2007-10-25): # Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week # earlier - on the last Sunday of October, just like in 2006. # # He supplied these references: # # http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES # http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm # # From Alex Krivenyshev (2007-10-25): # Here is also article from Granma (Cuba): # # Regirá el Horario Normal desde el próximo domingo 28 de octubre # http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html # # http://www.worldtimezone.com/dst_news/dst_news_cuba03.html # From Arthur David Olson (2008-03-09): # I'm in Maryland which is now observing United States Eastern Daylight # Time. At 9:44 local time I used RealPlayer to listen to # http://media.enet.cu/radioreloj # a Cuban information station, and heard # the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), # indicating that Cuba is still on standard time. # From Steffen Thorsen (2008-03-12): # It seems that Cuba will start DST on Sunday, 2007-03-16... # It was announced yesterday, according to this source (in Spanish): # http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm # # Some more background information is posted here: # http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html # # The article also says that Cuba has been observing DST since 1963, # while Shanks (and tzdata) has 1965 as the first date (except in the # 1940's). Many other web pages in Cuba also claim that it has been # observed since 1963, but with the exception of 1970 - an exception # which is not present in tzdata/Shanks. So there is a chance we need to # change some historic records as well. # # One example: # http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm # From Jesper Nørgaard Welen (2008-03-13): # The Cuban time change has just been confirmed on the most authoritative # web site, the Granma. Please check out # http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html # # Basically as expected after Steffen Thorsen's information, the change # will take place midnight between Saturday and Sunday. # From Arthur David Olson (2008-03-12): # Assume Sun>=15 (third Sunday) going forward. # From Alexander Krivenyshev (2009-03-04) # According to the Radio Reloj - Cuba will start Daylight Saving Time on # midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- # not on midnight March 14 / March 15 as previously thought. # # http://www.worldtimezone.com/dst_news/dst_news_cuba05.html # (in Spanish) # From Arthur David Olson (2009-03-09) # I listened over the Internet to # http://media.enet.cu/readioreloj # this morning; when it was 10:05 a. m. here in Bethesda, Maryland the # the time was announced as "diez cinco" - the same time as here, indicating # that has indeed switched to DST. Assume second Sunday from 2009 forward. # From Steffen Thorsen (2011-03-08): # Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00 # this year. Nothing about the end date known so far (if that has # changed at all). # # Source: # http://granma.co.cu/2011/03/08/nacional/artic01.html # # Our info: # http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html # # From Steffen Thorsen (2011-10-30) # Cuba will end DST two weeks later this year. Instead of going back # tonight, it has been delayed to 2011-11-13 at 01:00. # # One source (Spanish) # http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html # # Our page: # http://www.timeanddate.com/news/time/cuba-time-changes-2011.html # # From Steffen Thorsen (2012-03-01) # According to Radio Reloj, Cuba will start DST on Midnight between March # 31 and April 1. # # Radio Reloj has the following info (Spanish): # http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril # # Our info on it: # http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html # From Steffen Thorsen (2012-11-03): # Radio Reloj and many other sources report that Cuba is changing back # to standard time on 2012-11-04: # http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre # From Paul Eggert (2012-11-03): # For now, assume the future rule is first Sunday in November. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Cuba 1928 only - Jun 10 0:00 1:00 D Rule Cuba 1928 only - Oct 10 0:00 0 S Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S Rule Cuba 1965 only - Jun 1 0:00 1:00 D Rule Cuba 1965 only - Sep 30 0:00 0 S Rule Cuba 1966 only - May 29 0:00 1:00 D Rule Cuba 1966 only - Oct 2 0:00 0 S Rule Cuba 1967 only - Apr 8 0:00 1:00 D Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S Rule Cuba 1968 only - Apr 14 0:00 1:00 D Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S Rule Cuba 1972 1974 - Oct 8 0:00 0 S Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S Rule Cuba 1978 only - May 7 0:00 1:00 D Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S Rule Cuba 1996 only - Oct 6 0:00s 0 S Rule Cuba 1997 only - Oct 12 0:00s 0 S Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S Rule Cuba 2000 2003 - Apr Sun>=1 0:00s 1:00 D Rule Cuba 2004 only - Mar lastSun 0:00s 1:00 D Rule Cuba 2006 2010 - Oct lastSun 0:00s 0 S Rule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D Rule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D Rule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D Rule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D Rule Cuba 2011 only - Nov 13 0:00s 0 S Rule Cuba 2012 only - Apr 1 0:00s 1:00 D Rule Cuba 2012 max - Nov Sun>=1 0:00s 0 S Rule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Havana -5:29:28 - LMT 1890 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT -5:00 Cuba C%sT # Dominica # See America/Port_of_Spain. # Dominican Republic # From Steffen Thorsen (2000-10-30): # Enrique Morales reported to me that the Dominican Republic has changed the # time zone to Eastern Standard Time as of Sunday 29 at 2 am.... # http://www.listin.com.do/antes/261000/republica/princi.html # From Paul Eggert (2000-12-04): # That URL (2000-10-26, in Spanish) says they planned to use US-style DST. # From Rives McDow (2000-12-01): # Dominican Republic changed its mind and presidential decree on Tuesday, # November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the # Dominican Republic will be reverting to 8 hours from the International Date # Line, and will not be using DST in the foreseeable future. The reason they # decided to use DST was to be in synch with Puerto Rico, who was also going # to implement DST. When Puerto Rico didn't implement DST, the president # decided to revert. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule DR 1966 only - Oct 30 0:00 1:00 D Rule DR 1967 only - Feb 28 0:00 0 S Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD Rule DR 1970 only - Feb 21 0:00 0 S Rule DR 1971 only - Jan 20 0:00 0 S Rule DR 1972 1974 - Jan 21 0:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Santo_Domingo -4:39:36 - LMT 1890 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT -5:00 DR E%sT 1974 Oct 27 -4:00 - AST 2000 Oct 29 02:00 -5:00 US E%sT 2000 Dec 3 01:00 -4:00 - AST # El Salvador # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D Rule Salv 1987 1988 - Sep lastSun 0:00 0 S # There are too many San Salvadors elsewhere, so use America/El_Salvador # instead of America/San_Salvador. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador -6:00 Salv C%sT # Grenada # Guadeloupe # St Barthélemy # St Martin (French part) # See America/Port_of_Spain. # Guatemala # # From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: # Diario Co Latino, at # , # says in an article dated 2006-04-19 that the Guatemalan government had # decided on that date to advance official time by 60 minutes, to lessen the # impact of the elevated cost of oil.... Daylight saving time will last from # 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). # From Paul Eggert (2006-06-22): # The Ministry of Energy and Mines, press release CP-15/2006 # (2006-04-19), says DST ends at 24:00. See # . # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Guat 1973 only - Nov 25 0:00 1:00 D Rule Guat 1974 only - Feb 24 0:00 0 S Rule Guat 1983 only - May 21 0:00 1:00 D Rule Guat 1983 only - Sep 22 0:00 0 S Rule Guat 1991 only - Mar 23 0:00 1:00 D Rule Guat 1991 only - Sep 7 0:00 0 S Rule Guat 2006 only - Apr 30 0:00 1:00 D Rule Guat 2006 only - Oct 1 0:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5 -6:00 Guat C%sT # Haiti # From Gwillim Law (2005-04-15): # Risto O. Nykänen wrote me that Haiti is now on DST. # I searched for confirmation, and I found a press release # on the Web page of the Haitian Consulate in Chicago (2005-03-31), # . Translated from French, it says: # # "The Prime Minister's Communication Office notifies the public in general # and the press in particular that, following a decision of the Interior # Ministry and the Territorial Collectivities [I suppose that means the # provinces], Haiti will move to Eastern Daylight Time in the night from next # Saturday the 2nd to Sunday the 3rd. # # "Consequently, the Prime Minister's Communication Office wishes to inform # the population that the country's clocks will be set forward one hour # starting at midnight. This provision will hold until the last Saturday in # October 2005. # # "Port-au-Prince, March 31, 2005" # # From Steffen Thorsen (2006-04-04): # I have been informed by users that Haiti observes DST this year like # last year, so the current "only" rule for 2005 might be changed to a # "max" rule or to last until 2006. (Who knows if they will observe DST # next year or if they will extend their DST like US/Canada next year). # # I have found this article about it (in French): # http://www.haitipressnetwork.com/news.cfm?articleID=7612 # # The reason seems to be an energy crisis. # From Stephen Colebourne (2007-02-22): # Some IATA info: Haiti won't be having DST in 2007. # From Steffen Thorsen (2012-03-11): # According to several news sources, Haiti will observe DST this year, # apparently using the same start and end date as USA/Canada. # So this means they have already changed their time. # # http://www.alterpresse.org/spip.php?article12510 # http://radiovision2000haiti.net/home/?p=13253 # # From Arthur David Olson (2012-03-11): # The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to # 3:00 a.m. rather than the traditional Haitian jump at midnight. # Assume a US-style fall back as well. # From Steffen Thorsen (2013-03-10): # It appears that Haiti is observing DST this year as well, same rules # as US/Canada. They did it last year as well, and it looks like they # are going to observe DST every year now... # # http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/ # http://www.canalplushaiti.net/?p=6714 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Haiti 1983 only - May 8 0:00 1:00 D Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S # Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. # Go with IATA. Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S Rule Haiti 2012 max - Mar Sun>=8 2:00 1:00 D Rule Haiti 2012 max - Nov Sun>=1 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Port-au-Prince -4:49:20 - LMT 1890 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT -5:00 Haiti E%sT # Honduras # Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. # From Paul Eggert (2006-05-05): # worldtimezone.com reports a 2006-05-02 Spanish-language AP article # saying Honduras will start using DST midnight Saturday, effective 4 # months until September. La Tribuna reported today # that Manuel Zelaya, the president # of Honduras, refused to back down on this. # From Jesper Nørgaard Welen (2006-08-08): # It seems that Honduras has returned from DST to standard time this Monday at # 00:00 hours (prolonging Sunday to 25 hours duration). # http://www.worldtimezone.com/dst_news/dst_news_honduras04.html # From Paul Eggert (2006-08-08): # Also see Diario El Heraldo, The country returns to standard time (2006-08-08) # . # It mentions executive decree 18-2006. # From Steffen Thorsen (2006-08-17): # Honduras will observe DST from 2007 to 2009, exact dates are not # published, I have located this authoritative source: # http://www.presidencia.gob.hn/noticia.aspx?nId=47 # From Steffen Thorsen (2007-03-30): # http://www.laprensahn.com/pais_nota.php?id04962=7386 # So it seems that Honduras will not enter DST this year.... # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D Rule Hond 1987 1988 - Sep lastSun 0:00 0 S Rule Hond 2006 only - May Sun>=1 0:00 1:00 D Rule Hond 2006 only - Aug Mon>=1 0:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr -6:00 Hond C%sT # # Great Swan I ceded by US to Honduras in 1972 # Jamaica # Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an # unspecified official document, and says "This time is used throughout the # island". Go with Milne. Round to the nearest second as required by zic. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Jamaica -5:07:11 - LMT 1890 # Kingston -5:07:11 - KMT 1912 Feb # Kingston Mean Time -5:00 - EST 1974 Apr 28 2:00 -5:00 US E%sT 1984 -5:00 - EST # Martinique # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France -4:04:20 - FFMT 1911 May # Fort-de-France MT -4:00 - AST 1980 Apr 6 -4:00 1:00 ADT 1980 Sep 28 -4:00 - AST # Montserrat # See America/Port_of_Spain. # Nicaragua # # This uses Shanks & Pottenger for times before 2005. # # From Steffen Thorsen (2005-04-12): # I've got reports from 8 different people that Nicaragua just started # DST on Sunday 2005-04-10, in order to save energy because of # expensive petroleum. The exact end date for DST is not yet # announced, only "September" but some sites also say "mid-September". # Some background information is available on the President's official site: # http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm # The Decree, no 23-2005 is available here: # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2005/Decreto%2023-2005%20Se%20adelanta%20en%20una%20hora%20en%20todo%20el%20territorio%20nacional%20apartir%20de%20las%2024horas%20del%2009%20de%20Abril.pdf # # From Paul Eggert (2005-05-01): # The decree doesn't say anything about daylight saving, but for now let's # assume that it is daylight saving.... # # From Gwillim Law (2005-04-21): # The Associated Press story on the time change, which can be found at # http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html # and elsewhere, says (fifth paragraph, translated from Spanish): "The last # time that a change of clocks was applied to save energy was in the year 2000 # during the Arnoldo Alemán administration."... # The northamerica file says that Nicaragua has been on UTC-6 continuously # since December 1998. I wasn't able to find any details of Nicaraguan time # changes in 2000. Perhaps a note could be added to the northamerica file, to # the effect that we have indirect evidence that DST was observed in 2000. # # From Jesper Nørgaard Welen (2005-11-02): # Nicaragua left DST the 2005-10-02 at 00:00 (local time). # http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm # (2005-09-26) # # From Jesper Nørgaard Welen (2006-05-05): # http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 # (my informal translation) # By order of the president of the republic, Enrique Bolaños, Nicaragua # advanced by sixty minutes their official time, yesterday at 2 in the # morning, and will stay that way until 30th of September. # # From Jesper Nørgaard Welen (2006-09-30): # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf # My informal translation runs: # The natural sun time is restored in all the national territory, in that the # time is returned one hour at 01:00 am of October 1 of 2006. # # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S Rule Nic 2005 only - Apr 10 0:00 1:00 D Rule Nic 2005 only - Oct Sun>=1 0:00 0 S Rule Nic 2006 only - Apr 30 2:00 1:00 D Rule Nic 2006 only - Oct Sun>=1 1:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Managua -5:45:08 - LMT 1890 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? -6:00 - CST 1973 May -5:00 - EST 1975 Feb 16 -6:00 Nic C%sT 1992 Jan 1 4:00 -5:00 - EST 1992 Sep 24 -6:00 - CST 1993 -5:00 - EST 1997 -6:00 Nic C%sT # Panama # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Panama -5:18:08 - LMT 1890 -5:19:36 - CMT 1908 Apr 22 # Colón Mean Time -5:00 - EST # Puerto Rico # There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan -4:00 - AST 1942 May 3 -4:00 US A%sT 1946 -4:00 - AST # St Kitts-Nevis # St Lucia # See America/Port_of_Spain. # St Pierre and Miquelon # There are too many St Pierres elsewhere, so we'll use 'Miquelon'. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre -4:00 - AST 1980 May -3:00 - PMST 1987 # Pierre & Miquelon Time -3:00 Canada PM%sT # St Vincent and the Grenadines # See America/Port_of_Spain. # Turks and Caicos # # From Chris Dunn in # # (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the # daylight saving dates for time changes have been adjusted to match # the recent U.S. change of dates. # # From Brian Inglis (2007-04-28): # http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] # there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three # rows before that there is an out of date entry for Oct: # "Eastern Standard Times Begins 2007 # Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" # indicating that the normal ET rules are followed. # # From Paul Eggert (2006-05-01): # Shanks & Pottenger say they use US DST rules, but IATA SSIM (1991/1998) # says they switch at midnight. Go with Shanks & Pottenger. # # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule TC 1979 1986 - Apr lastSun 2:00 1:00 D Rule TC 1979 2006 - Oct lastSun 2:00 0 S Rule TC 1987 2006 - Apr Sun>=1 2:00 1:00 D Rule TC 2007 max - Mar Sun>=8 2:00 1:00 D Rule TC 2007 max - Nov Sun>=1 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Grand_Turk -4:44:32 - LMT 1890 -5:07:11 - KMT 1912 Feb # Kingston Mean Time -5:00 TC E%sT # British Virgin Is # Virgin Is # See America/Port_of_Spain. # Local Variables: # coding: utf-8 # End: @