Lines Matching +full:hall +full:- +full:effect
4 # 2009-05-17 by Arthur David Olson.
13 # From Paul Eggert (1999-03-22):
21 # From Paul Eggert (1999-03-31):
22 # Howse writes (pp 121-125) that time zones were invented by
23 # Professor Charles Ferdinand Dowd (1825-1904),
27 # in New York City (1869-10). His 1870 proposal was based on Washington, DC,
28 # but in 1872-05 he moved the proposed origin to Greenwich.
30 # From Paul Eggert (2018-03-20):
33 # work in the US was William Frederick Allen - railway engineer,
38 # to the General Time Convention on 1883-04-11, saying that his plan
39 # meant "local time would be practically abolished" - a plus for
40 # railway scheduling. By the next convention on 1883-10-11 nearly all
41 # railroads had agreed and it took effect on 1883-11-18. That Sunday
47 # Observatory ... the time-ball made its rapid descent, the chimes
52 # Bartky IR. The adoption of standard time. Technol Cult 1989 Jan;30(1):25-56.
55 # From Paul Eggert (2005-04-16):
59 # From Paul Eggert (2006-03-22):
64 # It is the source for most of the pre-1991 US entries below.
66 # From Paul Eggert (2001-03-06):
69 # of Light" published in the Journal de Paris (1784-04-26).
79 # scheme I detect the bony, blue-fingered hand of Puritanism, eager
83 # -- Robertson Davies, The diary of Samuel Marchbanks,
96 # From Paul Eggert (2019-06-04):
98 # * Public Law 65-106 (1918-03-19) implemented standard and daylight saving
101 # https://www.loc.gov/law/help/statutes-at-large/65th-congress/session-2/c65s2ch24.pdf
102 # * Public Law 66-40 (1919-08-20) repealed DST on October 1919's last Sunday.
103 # https://www.loc.gov/law/help/statutes-at-large/66th-congress/session-1/c66s1ch51.pdf
104 # * Public Law 77-403 (1942-01-20) started wartime DST on 1942-02-09.
105 # https://www.loc.gov/law/help/statutes-at-large/77th-congress/session-2/c77s2ch7.pdf
106 # * Public Law 79-187 (1945-09-25) ended wartime DST on 1945-09-30.
107 # https://www.loc.gov/law/help/statutes-at-large/79th-congress/session-1/c79s1ch388.pdf
108 # * Public Law 89-387 (1966-04-13) reinstituted a national standard for DST,
110 # https://www.govinfo.gov/content/pkg/STATUTE-80/pdf/STATUTE-80-Pg107.pdf
111 # * Public Law 93-182 (1973-12-15) moved the 1974 spring-forward to 01-06.
112 # https://www.govinfo.gov/content/pkg/STATUTE-87/pdf/STATUTE-87-Pg707.pdf
113 # * Public Law 93-434 (1974-10-05) moved the 1975 spring-forward to
115 # https://www.govinfo.gov/content/pkg/STATUTE-88/pdf/STATUTE-88-Pg1209.pdf
116 # * Public Law 99-359 (1986-07-08) moved the spring-forward to April's first
118 # https://www.govinfo.gov/content/pkg/STATUTE-100/pdf/STATUTE-100-Pg764.pdf
119 # * Public Law 109-58 (2005-08-08), effective 2007, moved the spring-forward
120 # to March's second Sunday and the fall-back to November's first Sunday.
121 # https://www.govinfo.gov/content/pkg/PLAW-109publ58/pdf/PLAW-109publ58.pdf
125 # Before the Uniform Time Act of 1966 took effect in 1967, observance of
128 # From Arthur David Olson (2000-09-25):
137 # From Paul Eggert (2017-09-23):
138 # This was the V-J Day issue of the Clamdigger, a Rowayton, CT newsletter.
142 # At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set
150 # From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From
153 # ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender.
165 # He had scored a 20-second scoop on other broadcasters.
167 # From Arthur David Olson (2005-08-22):
173 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
174 Rule US 1918 1919 - Mar lastSun 2:00 1:00 D
175 Rule US 1918 1919 - Oct lastSun 2:00 0 S
176 Rule US 1942 only - Feb 9 2:00 1:00 W # War
177 Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace
178 Rule US 1945 only - Sep 30 2:00 0 S
179 Rule US 1967 2006 - Oct lastSun 2:00 0 S
180 Rule US 1967 1973 - Apr lastSun 2:00 1:00 D
181 Rule US 1974 only - Jan 6 2:00 1:00 D
182 Rule US 1975 only - Feb lastSun 2:00 1:00 D
183 Rule US 1976 1986 - Apr lastSun 2:00 1:00 D
184 Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D
185 Rule US 2007 max - Mar Sun>=8 2:00 1:00 D
186 Rule US 2007 max - Nov Sun>=1 2:00 0 S
188 # From U. S. Naval Observatory (1989-01-19):
190 # USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30
192 # USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30
194 # USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30
196 # USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30
198 # USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT)
200 # USA " 9 H BEHIND UTC APR 3 - OCT 30
204 # From Arthur David Olson (1989-01-21):
210 # From Arthur David Olson (1988-02-13):
213 # up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966
214 # took effect), as explained in sections 263 and 261:
223 # Next, names from 1967-04-01 until 1983-11-30 (the date for
224 # public law 98-181):
231 # Alaska-Hawaii standard time
233 # And after 1983-11-30:
240 # Hawaii-Aleutian standard time
244 # From Paul Eggert (2016-12-19):
254 # -08 Standard Pacific Time (PST) Pacific standard time (PST)
255 # -09 (unofficial) Yukon (YST) Yukon standard time (YST)
256 # -10 Standard Alaska Time (AST) Alaska-Hawaii standard time (AHST)
257 # -11 (unofficial) Nome (NST) Bering standard time (BST)
259 # From Paul Eggert (2023-01-23), from a 2001-01-08 heads-up from Rives McDow:
260 # Public law 106-564 (2000-12-23) introduced "Chamorro standard time"
264 # From Paul Eggert (2015-04-17):
265 # HST and HDT are standardized abbreviations for Hawaii-Aleutian
268 # https://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf
270 # From Arthur David Olson, 2005-08-09
271 # The following was signed into law on 2005-08-08.
274 # (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15
275 # U.S.C. 260a(a)) is amended--
280 # (b) Effective Date.--Subsection (a) shall take effect 1 year after the
282 # (c) Report to Congress.--Not later than 9 months after the effective
286 # (d) Right to Revert.--Congress retains the right to revert the
299 # From Dave Cantor (2004-11-02):
306 # From Paul Eggert (2005-08-26):
316 # From Paul Eggert (2017-02-22):
322 # Alabama towns are in a different time zone? al.com 2017-02-06.
325 # From Paul Eggert (2014-09-06):
326 # Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208
327 # says that New York City Hall time was 3 minutes 58.4 seconds fast of
328 # Eastern time (i.e., -4:56:01.6) just before the 1883 switch.
330 # Rule NAME FROM TO - IN ON AT SAVE LETTER
331 Rule NYC 1920 only - Mar lastSun 2:00 1:00 D
332 Rule NYC 1920 only - Oct lastSun 2:00 0 S
333 Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D
334 Rule NYC 1921 1954 - Sep lastSun 2:00 0 S
335 Rule NYC 1955 1966 - Oct lastSun 2:00 0 S
337 #STDOFF -4:56:01.6
338 Zone America/New_York -4:56:02 - LMT 1883 Nov 18 17:00u
339 -5:00 US E%sT 1920
340 -5:00 NYC E%sT 1942
341 -5:00 US E%sT 1946
342 -5:00 NYC E%sT 1967
343 -5:00 US E%sT
356 # From Paul Eggert (2018-01-07):
359 # Dearborn Observatory (on the University of Chicago campus) to City Hall,
365 # Moser M. How Chicago gave America its time zones. Chicago. 2018-01-04.
366 # http://www.chicagomag.com/city-life/January-2018/How-Chicago-Gave-America-Its-Time-Zones/
368 # From Larry M. Smith (2006-04-26) re Wisconsin:
375 # From Douglas R. Bomberg (2007-03-12):
376 # Wisconsin has enacted (nearly eleventh-hour) legislation to get WI
380 # From an email administrator of the City of Fort Pierre, SD (2015-12-21):
387 # From Paul Eggert (2015-12-25):
390 # From Paul Eggert (2015-04-06):
405 # but the time of day - and last week they couldn't agree on that.'
407 # "It was all too true. The clock on the front of the building had two faces -
412 # The Tennessean 2007-05-11, republished 2015-04-06.
413 …essean.com/story/insider/extras/2015/04/06/archives-seigenthaler-for-100-years-the-tennessean-had-…
415 # Rule NAME FROM TO - IN ON AT SAVE LETTER
416 Rule Chicago 1920 only - Jun 13 2:00 1:00 D
417 Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S
418 Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D
419 Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D
420 Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S
421 Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S
423 Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 18:00u
424 -6:00 US C%sT 1920
425 -6:00 Chicago C%sT 1936 Mar 1 2:00
426 -5:00 - EST 1936 Nov 15 2:00
427 -6:00 Chicago C%sT 1942
428 -6:00 US C%sT 1946
429 -6:00 Chicago C%sT 1967
430 -6:00 US C%sT
431 # Oliver County, ND switched from mountain to central time on 1992-10-25.
432 Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 19:00u
433 -7:00 US M%sT 1992 Oct 25 2:00
434 -6:00 US C%sT
436 # 2003-10-26, except for the area around Mandan which was already central time.
441 # See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>.
442 Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 19:00u
443 -7:00 US M%sT 2003 Oct 26 2:00
444 -6:00 US C%sT
446 # From Josh Findley (2011-01-21):
449 # daylight-saving to standard time (on Nov. 7, 2010):
450 # https://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm
451 # http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html
453 # From Andy Lipscomb (2011-01-24):
455 # it's commonly referred to as Beulah-Hazen, with Hazen being the next
456 # largest city in Mercer County). Google Maps places Beulah's city hall
459 Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 19:00u
460 -7:00 US M%sT 2010 Nov 7 2:00
461 -6:00 US C%sT
471 # From Paul Eggert (2018-10-25):
472 # On 1921-03-04 federal law placed all of Texas into the central time zone.
477 # 1970-04-10 to match what El Paso was actually doing. Although
481 # El Paso Times. 2018-10-24 06:40 -06.
482 …s://www.elpasotimes.com/story/news/local/el-paso/2018/10/24/el-pasoans-were-time-rebels-fought-sta…
484 # Rule NAME FROM TO - IN ON AT SAVE LETTER
485 Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D
486 Rule Denver 1920 only - Oct lastSun 2:00 0 S
487 Rule Denver 1921 only - May 22 2:00 0 S
488 Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D
489 Rule Denver 1965 1966 - Oct lastSun 2:00 0 S
491 Zone America/Denver -6:59:56 - LMT 1883 Nov 18 19:00u
492 -7:00 US M%sT 1920
493 -7:00 Denver M%sT 1942
494 -7:00 US M%sT 1946
495 -7:00 Denver M%sT 1967
496 -7:00 US M%sT
506 # From Paul Eggert (2016-08-20):
513 # 1973-11. https://escholarship.org/uc/item/8x22k30c
515 # In another measure to save electricity, DST was instituted from 1948-03-14
516 # at 02:01 to 1949-01-16 at 02:00, with the governor having the option to move
517 # the fallback transition earlier. See pages 3-4 of:
524 # factor in the defeat of the Dewey-Warren Presidential ticket in California.
525 # -- Ross, p 25
528 # (LA Times 1948-12-09). The transition time was 02:00 (LA Times 1949-01-01).
533 # the fall-back date to October's last Sunday. See:
537 # Rule NAME FROM TO - IN ON AT SAVE LETTER
538 Rule CA 1948 only - Mar 14 2:01 1:00 D
539 Rule CA 1949 only - Jan 1 2:00 0 S
540 Rule CA 1950 1966 - Apr lastSun 1:00 1:00 D
541 Rule CA 1950 1961 - Sep lastSun 2:00 0 S
542 Rule CA 1962 1966 - Oct lastSun 2:00 0 S
544 Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 20:00u
545 -8:00 US P%sT 1946
546 -8:00 CA P%sT 1967
547 -8:00 US P%sT
550 # AK%sT is the modern abbreviation for -09 per USNO.
552 # From Paul Eggert (2017-06-15):
554 # and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.
555 # On Friday, 1867-10-18 (Gregorian), at precisely 15:30 local time, the
557 # formal transfer. See the Sacramento Daily Union (1867-11-14), p 3, col 2.
558 # https://cdnc.ucr.edu/cgi-bin/cdnc?a=d&d=SDU18671114.2.12.1
559 # Sitka workers did not change their calendars until Sunday, 1867-10-20,
561 # From the memoirs of a Finnish workman. Alaska History. 2006 Fall;21(2):1-25.
562 # http://alaskahistoricalsociety.org/wp-content/uploads/2016/12/Ahllund-2006-Memoirs-of-a-Finnish-W…
569 # destroyed in 1805 by a Yakutat-kon war party.) Many of Alaska's inhabitants
571 # time change. However, the Russian-influenced part of Alaska did observe
574 # salute as a somewhat-arbitrary time for the formal transfer of control for
575 # all of Alaska. Sitka's UTC offset is -9:01:13; adjust its 15:30 to the
578 # From Paul Eggert (2014-07-18):
582 # See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01.
583 # http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html
585 # Steve Ferguson (2011-01-31) referred to the following source:
587 # Alaska History 2001;16(1-2).
588 # http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/keeping-time-in-alaska/
590 # From Arthur David Olson (2011-02-01):
591 # Here's database-relevant material from the 2001 "Alaska History" article:
611 # From Arthur David Olson (2011-02-09):
617 # that meant they were on Pacific time, they said no - they were on their
621 # From Arthur David Olson (2011-08-17):
625 # From Steffen Thorsen (2015-11-09):
629 # https://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/
631 # From Ryan Stanley (2018-11-06):
634 # They will be gmtoff=-28800 year-round.
635 # https://www.facebook.com/141055983004923/photos/pb.141055983004923.-2207520000.1541465673./569081…
637 # From Paul Eggert (2018-12-16):
638 # In a 2018-12-11 special election, Metlakatla voted to go back to
640 # https://www.krbd.org/2018/12/12/metlakatla-to-follow-alaska-standard-time-allow-liquor-sales/
642 # From Ryan Stanley (2019-01-11):
644 # From Tim Parenti (2019-01-11):
646 # "fall back" will be on Sunday 2019-01-20 at 02:00:
648 # So they won't be waiting for Alaska to join them on 2019-03-10, but will
651 # From Paul Eggert (2023-01-23):
656 Zone America/Juneau 15:02:19 - LMT 1867 Oct 19 15:33:32
657 -8:57:41 - LMT 1900 Aug 20 12:00
658 -8:00 - PST 1942
659 -8:00 US P%sT 1946
660 -8:00 - PST 1969
661 -8:00 US P%sT 1980 Apr 27 2:00
662 -9:00 US Y%sT 1980 Oct 26 2:00
663 -8:00 US P%sT 1983 Oct 30 2:00
664 -9:00 US Y%sT 1983 Nov 30
665 -9:00 US AK%sT
666 Zone America/Sitka 14:58:47 - LMT 1867 Oct 19 15:30
667 -9:01:13 - LMT 1900 Aug 20 12:00
668 -8:00 - PST 1942
669 -8:00 US P%sT 1946
670 -8:00 - PST 1969
671 -8:00 US P%sT 1983 Oct 30 2:00
672 -9:00 US Y%sT 1983 Nov 30
673 -9:00 US AK%sT
674 Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 19 15:44:55
675 -8:46:18 - LMT 1900 Aug 20 12:00
676 -8:00 - PST 1942
677 -8:00 US P%sT 1946
678 -8:00 - PST 1969
679 -8:00 US P%sT 1983 Oct 30 2:00
680 -8:00 - PST 2015 Nov 1 2:00
681 -9:00 US AK%sT 2018 Nov 4 2:00
682 -8:00 - PST 2019 Jan 20 2:00
683 -9:00 US AK%sT
684 Zone America/Yakutat 14:41:05 - LMT 1867 Oct 19 15:12:18
685 -9:18:55 - LMT 1900 Aug 20 12:00
686 -9:00 - YST 1942
687 -9:00 US Y%sT 1946
688 -9:00 - YST 1969
689 -9:00 US Y%sT 1983 Nov 30
690 -9:00 US AK%sT
691 Zone America/Anchorage 14:00:24 - LMT 1867 Oct 19 14:31:37
692 -9:59:36 - LMT 1900 Aug 20 12:00
693 -10:00 - AST 1942
694 -10:00 US A%sT 1967 Apr
695 -10:00 - AHST 1969
696 -10:00 US AH%sT 1983 Oct 30 2:00
697 -9:00 US Y%sT 1983 Nov 30
698 -9:00 US AK%sT
699 Zone America/Nome 12:58:22 - LMT 1867 Oct 19 13:29:35
700 -11:01:38 - LMT 1900 Aug 20 12:00
701 -11:00 - NST 1942
702 -11:00 US N%sT 1946
703 -11:00 - NST 1967 Apr
704 -11:00 - BST 1969
705 -11:00 US B%sT 1983 Oct 30 2:00
706 -9:00 US Y%sT 1983 Nov 30
707 -9:00 US AK%sT
708 Zone America/Adak 12:13:22 - LMT 1867 Oct 19 12:44:35
709 -11:46:38 - LMT 1900 Aug 20 12:00
710 -11:00 - NST 1942
711 -11:00 US N%sT 1946
712 -11:00 - NST 1967 Apr
713 -11:00 - BST 1969
714 -11:00 US B%sT 1983 Oct 30 2:00
715 -10:00 US AH%sT 1983 Nov 30
716 -10:00 US H%sT
720 # 1942-06-06 to 1943-07-29, and similarly for Attu from 1942-06-07 to
721 # 1943-05-29 (all dates American). Both islands are now uninhabited.
724 # switched from -11:00 to -10:00 on 1968-09-22 at 02:00,
727 # From David Flater (2004-11-09):
728 # In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska
744 # From Arthur David Olson (2010-12-09):
745 # "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225
746 # of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09,
753 # act," (page 220), that year-round daylight saving time was in effect
754 # from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for
761 # From Arthur David Olson (2011-01-19):
764 # 2011-01-19) at American University's Pence Law Library. Page 85: "Act
767 # hour...This Act shall take effect upon its approval. Approved this 26th
770 # hereby repealed...This Act shall take effect upon its approval, upon
772 # that existing immediately prior to the taking effect of said Act 90.
776 # Note that 1933-05-21 was a Sunday.
780 Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00
781 -10:30 - HST 1933 Apr 30 2:00
782 -10:30 1:00 HDT 1933 May 21 12:00
783 -10:30 US H%sT 1947 Jun 8 2:00
784 -10:00 - HST
790 # From Paul Eggert (2002-10-20):
794 # <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23)
796 # Between 1944-01-01 and 1944-04-01 the State of Arizona used standard
799 # observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix
800 # Gazette says that was the date the law changed, and that 04-01 was
804 # Laws 1968, ch. 183 (effective 1968-03-21) repealed DST.
806 # Shanks says the 1944 experiment came to an end on 1944-03-17.
810 Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 19:00u
811 -7:00 US M%sT 1944 Jan 1 0:01
812 -7:00 - MST 1944 Apr 1 0:01
813 -7:00 US M%sT 1944 Oct 1 0:01
814 -7:00 - MST 1967
815 -7:00 US M%sT 1968 Mar 21
816 -7:00 - MST
818 # From Arthur David Olson (1988-02-13):
820 # notes in private correspondence dated 1987-12-28 that "Presently, only the
825 # From Paul Eggert (2013-08-26):
837 Zone America/Boise -7:44:49 - LMT 1883 Nov 18 20:00u
838 -8:00 US P%sT 1923 May 13 2:00
839 -7:00 US M%sT 1974
840 -7:00 - MST 1974 Feb 3 2:00
841 -7:00 US M%sT
848 # From Paul Eggert (2018-11-30):
854 # R-Madison, leans over the gallery railing and forces the official clock
859 # is simply ignored by fast-time communities."
860 # How Indiana went from 'God's time' to split zones and daylight-saving.
861 # Indianapolis Star. 2018-11-27 14:58 -05.
862 …om/story/news/politics/2018/11/27/indianapolis-indiana-time-zone-history-central-eastern-daylight-…
864 # From Paul Eggert (2007-08-17):
868 # - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
871 # - Dearborn and Ohio counties have been like America/New_York.
873 # - Clark, Floyd, and Harrison counties have been like
876 # - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke,
888 # From Paul Eggert (2014-06-26):
889 …tps://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-…
899 # From Gwillim Law (2007-02-10):
904 # Rule NAME FROM TO - IN ON AT SAVE LETTER
905 Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D
906 Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S
907 Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D
909 Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 18:00u
910 -6:00 US C%sT 1920
911 -6:00 Indianapolis C%sT 1942
912 -6:00 US C%sT 1946
913 -6:00 Indianapolis C%sT 1955 Apr 24 2:00
914 -5:00 - EST 1957 Sep 29 2:00
915 -6:00 - CST 1958 Apr 27 2:00
916 -5:00 - EST 1969
917 -5:00 US E%sT 1971
918 -5:00 - EST 2006
919 -5:00 US E%sT
923 # Rule NAME FROM TO - IN ON AT SAVE LETTER
924 Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D
925 Rule Marengo 1951 only - Sep lastSun 2:00 0 S
926 Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D
927 Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S
929 Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 18:00u
930 -6:00 US C%sT 1951
931 -6:00 Marengo C%sT 1961 Apr 30 2:00
932 -5:00 - EST 1969
933 -5:00 US E%sT 1974 Jan 6 2:00
934 -6:00 1:00 CDT 1974 Oct 27 2:00
935 -5:00 US E%sT 1976
936 -5:00 - EST 2006
937 -5:00 US E%sT
942 # Rule NAME FROM TO - IN ON AT SAVE LETTER
943 Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D
944 Rule Vincennes 1946 only - Sep lastSun 2:00 0 S
945 Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D
946 Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S
947 Rule Vincennes 1955 only - May 1 0:00 1:00 D
948 Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D
949 Rule Vincennes 1960 only - Oct lastSun 2:00 0 S
950 Rule Vincennes 1961 only - Sep lastSun 2:00 0 S
951 Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S
953 Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 18:00u
954 -6:00 US C%sT 1946
955 -6:00 Vincennes C%sT 1964 Apr 26 2:00
956 -5:00 - EST 1969
957 -5:00 US E%sT 1971
958 -5:00 - EST 2006 Apr 2 2:00
959 -6:00 US C%sT 2007 Nov 4 2:00
960 -5:00 US E%sT
963 # From Alois Treindl (2019-07-09):
967 # Rule NAME FROM TO - IN ON AT SAVE LETTER
968 Rule Perry 1955 only - May 1 0:00 1:00 D
969 Rule Perry 1955 1960 - Sep lastSun 2:00 0 S
970 Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D
971 Rule Perry 1961 1963 - Oct lastSun 2:00 0 S
973 Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 18:00u
974 -6:00 US C%sT 1946
975 -6:00 Perry C%sT 1964 Apr 26 2:00
976 -5:00 - EST 1967 Oct 29 2:00
977 -6:00 US C%sT 1969 Apr 27 2:00
978 -5:00 US E%sT 1971
979 -5:00 - EST 2006 Apr 2 2:00
980 -6:00 US C%sT
984 # Rule NAME FROM TO - IN ON AT SAVE LETTER
985 Rule Pike 1955 only - May 1 0:00 1:00 D
986 Rule Pike 1955 1960 - Sep lastSun 2:00 0 S
987 Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D
988 Rule Pike 1961 1964 - Oct lastSun 2:00 0 S
990 Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 18:00u
991 -6:00 US C%sT 1955
992 -6:00 Pike C%sT 1965 Apr 25 2:00
993 -5:00 - EST 1966 Oct 30 2:00
994 -6:00 US C%sT 1977 Oct 30 2:00
995 -5:00 - EST 2006 Apr 2 2:00
996 -6:00 US C%sT 2007 Nov 4 2:00
997 -5:00 US E%sT
1001 # From Arthur David Olson (1991-10-28):
1002 # An article on page A3 of the Sunday, 1991-10-27 Washington Post
1004 # 1991-10-27.
1005 # Rule NAME FROM TO - IN ON AT SAVE LETTER
1006 Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D
1007 Rule Starke 1947 1954 - Sep lastSun 2:00 0 S
1008 Rule Starke 1955 1956 - Oct lastSun 2:00 0 S
1009 Rule Starke 1957 1958 - Sep lastSun 2:00 0 S
1010 Rule Starke 1959 1961 - Oct lastSun 2:00 0 S
1012 Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 18:00u
1013 -6:00 US C%sT 1947
1014 -6:00 Starke C%sT 1962 Apr 29 2:00
1015 -5:00 - EST 1963 Oct 27 2:00
1016 -6:00 US C%sT 1991 Oct 27 2:00
1017 -5:00 - EST 2006 Apr 2 2:00
1018 -6:00 US C%sT
1022 # Rule NAME FROM TO - IN ON AT SAVE LETTER
1023 Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D
1024 Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S
1025 Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S
1026 Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S
1028 Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 18:00u
1029 -6:00 US C%sT 1946
1030 -6:00 Pulaski C%sT 1961 Apr 30 2:00
1031 -5:00 - EST 1969
1032 -5:00 US E%sT 1971
1033 -5:00 - EST 2006 Apr 2 2:00
1034 -6:00 US C%sT 2007 Mar 11 2:00
1035 -5:00 US E%sT
1039 Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 18:00u
1040 -6:00 US C%sT 1954 Apr 25 2:00
1041 -5:00 - EST 1969
1042 -5:00 US E%sT 1973
1043 -5:00 - EST 2006
1044 -5:00 US E%sT
1046 # From Paul Eggert (2018-03-20):
1047 # The Louisville & Nashville Railroad's 1883-11-18 change occurred at
1053 # From Michael Deckers (2019-08-06):
1055 # the switch in Louisville on 1946-04-28 was on 00:01
1056 # From Paul Eggert (2019-08-26):
1057 # That source was the Louisville Courier-Journal, 1946-04-27, p 4.
1058 # Shanks gives 02:00 for all 20th-century transition times in Louisville.
1064 # Rule NAME FROM TO - IN ON AT SAVE LETTER
1065 Rule Louisville 1921 only - May 1 2:00 1:00 D
1066 Rule Louisville 1921 only - Sep 1 2:00 0 S
1067 Rule Louisville 1941 only - Apr lastSun 2:00 1:00 D
1068 Rule Louisville 1941 only - Sep lastSun 2:00 0 S
1069 Rule Louisville 1946 only - Apr lastSun 0:01 1:00 D
1070 Rule Louisville 1946 only - Jun 2 2:00 0 S
1071 Rule Louisville 1950 1961 - Apr lastSun 2:00 1:00 D
1072 Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S
1073 Rule Louisville 1956 1961 - Oct lastSun 2:00 0 S
1075 Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 18:00u
1076 -6:00 US C%sT 1921
1077 -6:00 Louisville C%sT 1942
1078 -6:00 US C%sT 1946
1079 -6:00 Louisville C%sT 1961 Jul 23 2:00
1080 -5:00 - EST 1968
1081 -5:00 US E%sT 1974 Jan 6 2:00
1082 -6:00 1:00 CDT 1974 Oct 27 2:00
1083 -5:00 US E%sT
1088 # http://www.lake-cumberland.com/life/archive/news990129time.shtml
1089 # (1999-01-29) via WKYM-101.7:
1098 # From Rich Wales (2000-08-29):
1100 # Wayne County (central Kentucky) is switching from Central (-0600) to Eastern
1101 # (-0500) time. They won't "fall back" this year. See Sara Shipley,
1102 # The difference an hour makes, Nando Times (2000-08-29 15:33 -0400).
1104 # From Paul Eggert (2001-07-16):
1106 # Federal Register 65, 160 (2000-08-17), pp 50154-50158.
1107 # https://www.gpo.gov/fdsys/pkg/FR-2000-08-17/html/00-20854.htm
1109 Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 18:00u
1110 -6:00 US C%sT 1946
1111 -6:00 - CST 1968
1112 -6:00 US C%sT 2000 Oct 29 2:00
1113 -5:00 US E%sT
1116 # From Rives McDow (2000-08-30):
1119 # previously split between MST and CST) ... 1990-10
1120 # Starke County, IN (from CST to EST) ... 1991-10
1121 # Oliver County, ND (from MST to CST) ... 1992-10
1122 # West Wendover, NV (from PST TO MST) ... 1999-10
1123 # Wayne County, KY (from CST to EST) ... 2000-10
1125 # From Paul Eggert (2001-07-17):
1131 # 1999-10-31. See the
1132 # Federal Register 64, 203 (1999-10-21), pp 56705-56707.
1133 # https://www.gpo.gov/fdsys/pkg/FR-1999-10-21/html/99-27240.htm
1140 # From Bob Devine (1988-01-28):
1143 # From Paul Eggert (1999-03-31):
1144 # Shanks writes that Michigan started using standard time on 1885-09-18,
1145 # but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01)
1149 # be put back twenty-eight minutes to Central Standard Time. Half the
1152 # erect a sundial in front of the city hall was referred to the
1158 # From Paul Eggert (2001-03-06):
1163 # From Paul Eggert (2019-07-06):
1168 # 1967-06-14, in an article "State Adjusting to Switch to Fast Time"
1171 # observed DST until 1967-10-29 00:01, that time of day seems to be
1178 # Rule NAME FROM TO - IN ON AT SAVE LETTER
1179 Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D
1180 Rule Detroit 1948 only - Sep lastSun 2:00 0 S
1182 Zone America/Detroit -5:32:11 - LMT 1905
1183 -6:00 - CST 1915 May 15 2:00
1184 -5:00 - EST 1942
1185 -5:00 US E%sT 1946
1186 -5:00 Detroit E%sT 1967 Jun 14 0:01
1187 -5:00 US E%sT 1969
1188 -5:00 - EST 1973
1189 -5:00 US E%sT 1975
1190 -5:00 - EST 1975 Apr 27 2:00
1191 -5:00 US E%sT
1195 # Rule NAME FROM TO - IN ON AT SAVE LETTER
1196 Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D
1197 Rule Menominee 1946 only - Sep lastSun 2:00 0 S
1198 Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D
1199 Rule Menominee 1966 only - Oct lastSun 2:00 0 S
1201 Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00
1202 -6:00 US C%sT 1946
1203 -6:00 Menominee C%sT 1969 Apr 27 2:00
1204 -5:00 - EST 1973 Apr 29 2:00
1205 -6:00 US C%sT
1212 # US lighthouse 1917/1996-09
1215 # _Los Angeles Times_ (1998-11-10), A1, A10; it cites
1221 # From Paul Eggert (2017-02-10):
1237 # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94
1241 # Australian Ebook Publisher. 2017. ISBN 978-1-925516-96-8.
1248 # <http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf>
1249 # [PDF] (1914-03)
1259 # From Alain LaBonté (1994-11-14):
1261 # for both English and French in the CAN/CSA-Z234.4-89 standard....
1265 # -2:30 - - HAT NDT
1266 # -3 - - HAA ADT
1267 # -3:30 HNT NST - -
1268 # -4 HNA AST HAE EDT
1269 # -5 HNE EST HAC CDT
1270 # -6 HNC CST HAR MDT
1271 # -7 HNR MST HAP PDT
1272 # -8 HNP PST HAY YDT
1273 # -9 HNY YST - -
1285 # T: de Terre-Neuve
1288 # From Paul Eggert (1994-11-22):
1294 # From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31,
1295 # 2007-03-01):
1299 # https://archive.news.gov.bc.ca/releases/news_releases_2005-2009/2006AG0014-000330.htm
1307 # https://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf
1315 # http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm
1319 # http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf
1336 # http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf
1338 # From Paul Eggert (2014-10-18):
1340 # "It's about TIME", _Canadian Geographic_ (September-October 1998)
1346 # https://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html
1347 # https://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5
1350 # From Paul Eggert (2006-06-27):
1351 # For now, assume all of DST-observing Canada will fall into line with the
1354 # From Chris Walton (2011-12-01)
1369 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
1370 Rule Canada 1918 only - Apr 14 2:00 1:00 D
1371 Rule Canada 1918 only - Oct 27 2:00 0 S
1372 Rule Canada 1942 only - Feb 9 2:00 1:00 W # War
1373 Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace
1374 Rule Canada 1945 only - Sep 30 2:00 0 S
1375 Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D
1376 Rule Canada 1974 2006 - Oct lastSun 2:00 0 S
1377 Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D
1378 Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D
1379 Rule Canada 2007 max - Nov Sun>=1 2:00 0 S
1384 # From Paul Eggert (2017-10-14):
1386 # McLeod J. Labrador time - legal or not? St. John's Telegram, 2017-10-07
1387 # http://www.thetelegram.com/news/local/labrador-time--legal-or-not-154860/
1392 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
1393 Rule StJohns 1917 only - Apr 8 2:00 1:00 D
1394 Rule StJohns 1917 only - Sep 17 2:00 0 S
1396 Rule StJohns 1919 only - May 5 23:00 1:00 D
1397 Rule StJohns 1919 only - Aug 12 23:00 0 S
1398 # For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger.
1399 Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D
1400 Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S
1401 # For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks &
1403 Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D
1404 Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S
1406 # 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07
1408 # For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives
1409 # Apr 30 - Sep 24; go with Shanks & Pottenger.
1410 Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D
1411 Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S
1412 Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D
1413 Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S
1414 Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S
1415 # From Paul Eggert (2000-10-02):
1416 # INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches
1419 # From Michael Pelley (2011-09-12):
1428 # MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery
1433 Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D
1434 Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S
1435 Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD
1436 Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D
1437 Rule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D
1438 Rule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S
1442 Zone America/St_Johns -3:30:52 - LMT 1884
1443 -3:30:52 StJohns N%sT 1918
1444 -3:30:52 Canada N%sT 1919
1445 -3:30:52 StJohns N%sT 1935 Mar 30
1446 -3:30 StJohns N%sT 1942 May 11
1447 -3:30 Canada N%sT 1946
1448 -3:30 StJohns N%sT 2011 Nov
1449 -3:30 Canada N%sT
1453 # The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'.
1455 Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay
1456 -3:30:52 - NST 1918
1457 -3:30:52 Canada N%sT 1919
1458 -3:30:52 - NST 1935 Mar 30
1459 -3:30 - NST 1936
1460 -3:30 StJohns N%sT 1942 May 11
1461 -3:30 Canada N%sT 1946
1462 -3:30 StJohns N%sT 1966 Mar 15 2:00
1463 -4:00 StJohns A%sT 2011 Nov
1464 -4:00 Canada A%sT
1468 # Îles-de-la-Madeleine, Listuguj reserve
1470 # From Brian Inglis (2015-07-20):
1472 # https://weatherspark.com/history/28351/1971/Sydney-Nova-Scotia-Canada
1478 # From Paul Eggert (2015-07-20):
1487 # From Jeffery Nichols (2020-01-09):
1488 # America/Halifax ... also applies to Îles-de-la-Madeleine and the Listuguj
1489 # reserve in Quebec. Officially, this came into effect on January 1, 2007
1490 # (Legal Time Act, CQLR c T-5.1), but the legislative debates surrounding that
1492 # regions, which suggests that they have always been in-line with Halifax.
1494 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
1495 Rule Halifax 1916 only - Apr 1 0:00 1:00 D
1496 Rule Halifax 1916 only - Oct 1 0:00 0 S
1497 Rule Halifax 1920 only - May 9 0:00 1:00 D
1498 Rule Halifax 1920 only - Aug 29 0:00 0 S
1499 Rule Halifax 1921 only - May 6 0:00 1:00 D
1500 Rule Halifax 1921 1922 - Sep 5 0:00 0 S
1501 Rule Halifax 1922 only - Apr 30 0:00 1:00 D
1502 Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D
1503 Rule Halifax 1923 only - Sep 4 0:00 0 S
1504 Rule Halifax 1924 only - Sep 15 0:00 0 S
1505 Rule Halifax 1925 only - Sep 28 0:00 0 S
1506 Rule Halifax 1926 only - May 16 0:00 1:00 D
1507 Rule Halifax 1926 only - Sep 13 0:00 0 S
1508 Rule Halifax 1927 only - May 1 0:00 1:00 D
1509 Rule Halifax 1927 only - Sep 26 0:00 0 S
1510 Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D
1511 Rule Halifax 1928 only - Sep 9 0:00 0 S
1512 Rule Halifax 1929 only - Sep 3 0:00 0 S
1513 Rule Halifax 1930 only - Sep 15 0:00 0 S
1514 Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S
1515 Rule Halifax 1932 only - May 1 0:00 1:00 D
1516 Rule Halifax 1933 only - Apr 30 0:00 1:00 D
1517 Rule Halifax 1933 only - Oct 2 0:00 0 S
1518 Rule Halifax 1934 only - May 20 0:00 1:00 D
1519 Rule Halifax 1934 only - Sep 16 0:00 0 S
1520 Rule Halifax 1935 only - Jun 2 0:00 1:00 D
1521 Rule Halifax 1935 only - Sep 30 0:00 0 S
1522 Rule Halifax 1936 only - Jun 1 0:00 1:00 D
1523 Rule Halifax 1936 only - Sep 14 0:00 0 S
1524 Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D
1525 Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S
1526 Rule Halifax 1939 only - May 28 0:00 1:00 D
1527 Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D
1528 Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D
1529 Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S
1530 Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D
1531 Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S
1532 Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D
1533 Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S
1534 Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D
1535 Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S
1537 Zone America/Halifax -4:14:24 - LMT 1902 Jun 15
1538 -4:00 Halifax A%sT 1918
1539 -4:00 Canada A%sT 1919
1540 -4:00 Halifax A%sT 1942 Feb 9 2:00s
1541 -4:00 Canada A%sT 1946
1542 -4:00 Halifax A%sT 1974
1543 -4:00 Canada A%sT
1544 Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15
1545 -4:00 Canada A%sT 1953
1546 -4:00 Halifax A%sT 1954
1547 -4:00 - AST 1972
1548 -4:00 Halifax A%sT 1974
1549 -4:00 Canada A%sT
1553 # From Paul Eggert (2007-01-31):
1554 # The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf>
1556 # <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it
1560 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
1561 Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D
1562 Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S
1563 Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D
1564 Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S
1565 Rule Moncton 1939 only - May 27 1:00 1:00 D
1566 Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S
1567 Rule Moncton 1940 only - May 19 1:00 1:00 D
1568 Rule Moncton 1941 only - May 4 1:00 1:00 D
1569 Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D
1570 Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S
1571 Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S
1572 Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D
1573 Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S
1575 Zone America/Moncton -4:19:08 - LMT 1883 Dec 9
1576 -5:00 - EST 1902 Jun 15
1577 -4:00 Canada A%sT 1933
1578 -4:00 Moncton A%sT 1942
1579 -4:00 Canada A%sT 1946
1580 -4:00 Moncton A%sT 1973
1581 -4:00 Canada A%sT 1993
1582 -4:00 Moncton A%sT 2007
1583 -4:00 Canada A%sT
1587 # From Paul Eggert (2020-01-10):
1594 # From Mark Brader (2003-07-26):
1596 # effective Saturday, 1912-06-22, 22:00; the article mentions that
1599 # 1912-08-31 (no time mentioned), but it was met with considerable
1601 # only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but
1602 # presumably that should be -07-06. (1912-06-19, -07-12; also letters
1605 # Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21).
1607 # From Paul Eggert (2017-07-08):
1609 # time became a comic failure in Orillia. Toronto Star 2017-07-08.
1610 …://www.thestar.com/news/insight/2017/07/08/bold-attempt-at-daylight-saving-time-became-a-comic-fai…
1612 # From Mark Brader (2010-03-06):
1614 # In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom
1618 # The one-hour setback will go into effect throughout most of Ontario,
1629 # From Chris Walton (2024-01-09):
1631 # time instead of midnight.... Toronto Daily Star - ...
1632 # April 2, 1947 - Page 39 ... April 7, 1948 - Page 13 ...
1633 # April 2, 1949 - Page 1 ... April 7, 1949 - Page 24 ...
1634 # November 25, 1949 - Page 52 ... April 21, 1950 - Page 14 ...
1635 # September 19, 1950 - Page 46 ... September 20, 1950 - Page 3 ...
1636 # November 24, 1950 - Page 21
1638 # From Arthur David Olson (2010-07-17):
1642 # volume 26, number 2 (February 1932) and, as of 2010-07-17,
1651 # and towns, it is found that the following places used daylight sav-
1661 # Quebec Mont-Royal
1669 # Chambly-Canton Beaulieu
1683 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
1684 Rule Toronto 1919 only - Mar 30 23:30 1:00 D
1685 Rule Toronto 1919 only - Oct 26 0:00 0 S
1686 Rule Toronto 1920 only - May 2 2:00 1:00 D
1687 Rule Toronto 1920 only - Sep 26 0:00 0 S
1688 Rule Toronto 1921 only - May 15 2:00 1:00 D
1689 Rule Toronto 1921 only - Sep 15 2:00 0 S
1690 Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D
1691 # Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16"
1693 Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S
1694 Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D
1695 Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S
1696 Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D
1697 Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D
1698 Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S
1699 Rule Toronto 1945 1948 - Sep lastSun 2:00 0 S
1700 Rule Toronto 1946 1973 - Apr lastSun 2:00 1:00 D
1701 Rule Toronto 1949 1950 - Nov lastSun 2:00 0 S
1702 Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S
1704 # namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this
1705 # is wrong, and that he had confirmed it by checking the 1971-10-30
1706 # Toronto Star, which said that DST was ending 1971-10-31 as usual.
1707 Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S
1712 Zone America/Toronto -5:17:32 - LMT 1895
1713 -5:00 Canada E%sT 1919
1714 -5:00 Toronto E%sT 1942 Feb 9 2:00s
1715 -5:00 Canada E%sT 1946
1716 -5:00 Toronto E%sT 1974
1717 -5:00 Canada E%sT
1723 # From Rob Douglas (2006-04-06):
1724 # the old Manitoba Time Act - as amended by Bill 2, assented to
1732 # Also, as far as I can tell, there was no order-in-council varying
1734 # the 1987 version would apply - the changeover was at 2:00 Central
1737 # From Paul Eggert (2006-04-10):
1742 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
1743 Rule Winn 1916 only - Apr 23 0:00 1:00 D
1744 Rule Winn 1916 only - Sep 17 0:00 0 S
1745 Rule Winn 1918 only - Apr 14 2:00 1:00 D
1746 Rule Winn 1918 only - Oct 27 2:00 0 S
1747 Rule Winn 1937 only - May 16 2:00 1:00 D
1748 Rule Winn 1937 only - Sep 26 2:00 0 S
1749 Rule Winn 1942 only - Feb 9 2:00 1:00 W # War
1750 Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace
1751 Rule Winn 1945 only - Sep lastSun 2:00 0 S
1752 Rule Winn 1946 only - May 12 2:00 1:00 D
1753 Rule Winn 1946 only - Oct 13 2:00 0 S
1754 Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D
1755 Rule Winn 1947 1949 - Sep lastSun 2:00 0 S
1756 Rule Winn 1950 only - May 1 2:00 1:00 D
1757 Rule Winn 1950 only - Sep 30 2:00 0 S
1758 Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D
1759 Rule Winn 1951 1958 - Sep lastSun 2:00 0 S
1760 Rule Winn 1959 only - Oct lastSun 2:00 0 S
1761 Rule Winn 1960 only - Sep lastSun 2:00 0 S
1762 Rule Winn 1963 only - Apr lastSun 2:00 1:00 D
1763 Rule Winn 1963 only - Sep 22 2:00 0 S
1764 Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D
1765 Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S
1766 Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D
1768 Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16
1769 -6:00 Winn C%sT 2006
1770 -6:00 Canada C%sT
1775 # From Mark Brader (2003-07-26):
1777 # level. As the [Toronto] Star put it (1912-06-07), "While people
1780 # DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned:
1785 # From Paul Eggert (2003-07-27):
1786 # Willett (1914-03) notes that DST "has been in operation ... in the
1789 # From Paul Eggert (2019-07-25):
1790 # Pearce's book says Regina observed DST in 1914-1917. No dates and times,
1795 # From Paul Eggert (2006-03-22):
1802 # From W. Jones (1992-11-06):
1813 # On 15 April 1966 the Time Act (c. T-14, Revised Statutes of
1828 # From Chris Walton (2006-06-26):
1833 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
1834 Rule Regina 1918 only - Apr 14 2:00 1:00 D
1835 Rule Regina 1918 only - Oct 27 2:00 0 S
1836 Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D
1837 Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S
1838 Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D
1839 Rule Regina 1937 only - Oct Sun>=8 0:00 0 S
1840 Rule Regina 1938 only - Oct Sun>=1 0:00 0 S
1841 Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S
1842 Rule Regina 1942 only - Feb 9 2:00 1:00 W # War
1843 Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace
1844 Rule Regina 1945 only - Sep lastSun 2:00 0 S
1845 Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D
1846 Rule Regina 1946 only - Oct Sun>=8 2:00 0 S
1847 Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D
1848 Rule Regina 1947 1957 - Sep lastSun 2:00 0 S
1849 Rule Regina 1959 only - Apr lastSun 2:00 1:00 D
1850 Rule Regina 1959 only - Oct lastSun 2:00 0 S
1852 Rule Swift 1957 only - Apr lastSun 2:00 1:00 D
1853 Rule Swift 1957 only - Oct lastSun 2:00 0 S
1854 Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D
1855 Rule Swift 1959 only - Oct lastSun 2:00 0 S
1856 Rule Swift 1960 1961 - Sep lastSun 2:00 0 S
1858 Zone America/Regina -6:58:36 - LMT 1905 Sep
1859 -7:00 Regina M%sT 1960 Apr lastSun 2:00
1860 -6:00 - CST
1861 Zone America/Swift_Current -7:11:20 - LMT 1905 Sep
1862 -7:00 Canada M%sT 1946 Apr lastSun 2:00
1863 -7:00 Regina M%sT 1950
1864 -7:00 Swift M%sT 1972 Apr lastSun 2:00
1865 -6:00 - CST
1870 # From Alois Treindl (2019-07-19):
1874 # From Paul Eggert (2019-07-25):
1881 # ISBN 978-1459739123.
1883 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
1884 Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D
1885 Rule Edm 1918 only - Oct 27 2:00 0 S
1886 Rule Edm 1919 only - May 27 2:00 0 S
1887 Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D
1888 Rule Edm 1920 only - Oct lastSun 2:00 0 S
1889 Rule Edm 1921 1923 - Sep lastSun 2:00 0 S
1890 Rule Edm 1942 only - Feb 9 2:00 1:00 W # War
1891 Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace
1892 Rule Edm 1945 only - Sep lastSun 2:00 0 S
1893 Rule Edm 1947 only - Apr lastSun 2:00 1:00 D
1894 Rule Edm 1947 only - Sep lastSun 2:00 0 S
1895 Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D
1896 Rule Edm 1972 2006 - Oct lastSun 2:00 0 S
1898 Zone America/Edmonton -7:33:52 - LMT 1906 Sep
1899 -7:00 Edm M%sT 1987
1900 -7:00 Canada M%sT
1905 # From Paul Eggert (2006-03-22):
1910 # From Matt Johnson (2015-09-21):
1914 # http://www.northernrockies.ca/EN/meta/news/archives/2015/northern-rockies-time-change.html
1916 # From Tim Parenti (2015-09-23):
1918 # America/Fort_Nelson. The resolution of 2014-12-08 was reached following a
1919 # 2014-11-15 poll with nearly 75% support. Effectively, the municipality has
1920 # been on MST (-0700) like Dawson Creek since it advanced its clocks on
1921 # 2015-03-08.
1923 # From Paul Eggert (2019-07-25):
1925 # Alois Treindl confirmed this on 07-22, citing the 1946-04-27 Vancouver Daily
1926 # Province. He also cited the 1946-09-28 Victoria Daily Times, which said
1934 # observed DST in 1941 from 07-07 through 09-27; see
1935 …ttps://searcharchives.vancouver.ca/daylight-saving-1918-starts-again-july-7-1941-start-d-s-sept-27…
1938 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
1939 Rule Vanc 1918 only - Apr 14 2:00 1:00 D
1940 Rule Vanc 1918 only - Oct 27 2:00 0 S
1941 Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War
1942 Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace
1943 Rule Vanc 1945 only - Sep 30 2:00 0 S
1944 Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D
1945 Rule Vanc 1946 only - Sep 29 2:00 0 S
1946 Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S
1947 Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S
1949 Zone America/Vancouver -8:12:28 - LMT 1884
1950 -8:00 Vanc P%sT 1987
1951 -8:00 Canada P%sT
1952 Zone America/Dawson_Creek -8:00:56 - LMT 1884
1953 -8:00 Canada P%sT 1947
1954 -8:00 Vanc P%sT 1972 Aug 30 2:00
1955 -7:00 - MST
1956 Zone America/Fort_Nelson -8:10:47 - LMT 1884
1957 -8:00 Vanc P%sT 1946
1958 -8:00 - PST 1947
1959 -8:00 Vanc P%sT 1987
1960 -8:00 Canada P%sT 2015 Mar 8 2:00
1961 -7:00 - MST
1966 # From Chris Walton (2022-11-06):
1967 # Whitehorse Star - Thursday April 22, 1965 - page 1
1974 # Whitehorse Star - Monday October 25, 1965 - page 15 ...
1980 # Whitehorse Star - Thursday Feb 24,1966 - page 2
1983 # America/Whitehorse as a permanent change from UTC-9(YST) to
1984 # UTC-8(PST) at 00:00 on Sunday February 27, 1966....
1986 # Whitehorse Star - Friday April 28,1972 - page 6
1993 # From Paul Eggert (2022-11-06):
1994 # For now, assume Yukon's 1965-04-22 spring forward was 00:00 -> 02:00, as this
1995 # seems likely than 02:00 -> 04:00 and matches "after midnight".
1997 # From Paul Eggert (2006-03-22):
1999 # Mathew Englander (1996-10-07) gives the following refs:
2000 # * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,
2001 # c. 7 defines Yukon standard time as UTC-9....
2002 # see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1).
2003 # [https://www.canlii.org/en/ca/laws/stat/rsc-1985-c-i-21/latest/rsc-1985-c-i-21.html]
2004 # * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00.
2008 # From Brian Inglis (2015-04-14):
2029 # pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS)
2033 # thirty-fifth meridian.
2036 # JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System
2037 # (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1:
2046 # * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance
2050 # Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS)
2052 # Territory Commissioner's Order 1967-59 Interpretation Ordinance ...
2054 # 1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon
2058 # Interpretation Ordinance from and after mid-night on the 28th day of May,
2068 # https://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html
2075 # Act from and after midnight on the twenty-eighth day of October, 1973
2080 # https://mm.icann.org/pipermail/tz/attachments/20201125/d5adc93b/CAYTOIC1980-02DST1980-01-04-000…
2083 # https://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html
2095 # https://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html
2104 # 2. Order-in-Council 1987/56 is revoked.
2109 # https://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html
2111 # From Chris Walton (2022-11-06):
2118 # From Rives McDow (1999-09-04):
2123 # From Paul Eggert (1999-09-20):
2128 # From Paul Eggert (2000-10-02):
2141 # Nunavut now has two time zones (2000-11-10):
2143 # Cambridge Bay to operate on central time year-round, putting them
2152 # From Rives McDow (2001-01-20), quoting the Nunavut government:
2153 # The preceding decision came into effect at midnight, Saturday Nov 4, 2000.
2155 # From Paul Eggert (2000-12-04):
2158 # From Rives McDow (2001-03-07):
2160 # that effective 2001-04-01, the territory of Nunavut will revert
2166 # [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).]
2168 # From Gwillim Law (2005-05-21):
2172 # for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year
2178 # From Paul Eggert (2014-10-17):
2182 # see above for an up-to-date link.
2184 # From Chris Walton (2007-03-01):
2189 # http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html
2191 # From Chris Walton (2011-03-21):
2195 # decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007.
2198 # went back to using UTC-6 in the winter of 2007-2008...
2203 # to confirm that Resolute Bay was still operating on UTC-5. It was
2213 # information. I found an e-mail address for somebody by the name of
2215 # Arctic Co-operatives." I was under the impression that Stephanie lived
2220 # 2010-2011 and that the clocks had therefore been moved one hour ahead
2225 # On March 17/2011 I searched the Web to find an e-mail address of
2233 # I sent Aziz an e-mail asking when Resolute Bay had stopped using
2238 # of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in
2243 # I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz
2253 # From Tim Parenti (2020-03-05):
2256 # will remain on [UTC-07]. ... [The government] found 93 per cent of
2259 # https://www.cbc.ca/news/canada/north/yukon-end-daylight-saving-time-1.5486358
2263 # https://yukon.ca/en/news/yukon-end-seasonal-time-change
2265 # From Andrew G. Smith (2020-09-24):
2266 # Yukon has completed its regulatory change to be on UTC -7 year-round....
2268 # What we have done is re-defined Yukon Standard Time, as we are
2272 # From Paul Eggert (2020-09-24):
2275 # with that, use MST for -07, the new standard time in Yukon effective Nov. 1.
2277 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
2278 Rule NT_YK 1918 only - Apr 14 2:00 1:00 D
2279 Rule NT_YK 1918 only - Oct 27 2:00 0 S
2280 Rule NT_YK 1919 only - May 25 2:00 1:00 D
2281 Rule NT_YK 1919 only - Nov 1 0:00 0 S
2282 Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War
2283 Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace
2284 Rule NT_YK 1945 only - Sep 30 2:00 0 S
2285 Rule NT_YK 1972 1986 - Apr lastSun 2:00 1:00 D
2286 Rule NT_YK 1972 2006 - Oct lastSun 2:00 0 S
2287 Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D
2288 Rule Yukon 1965 only - Apr lastSun 0:00 2:00 DD
2289 Rule Yukon 1965 only - Oct lastSun 2:00 0 S
2292 Zone America/Iqaluit 0 - -00 1942 Aug # Frobisher Bay est.
2293 -5:00 NT_YK E%sT 1999 Oct 31 2:00
2294 -6:00 Canada C%sT 2000 Oct 29 2:00
2295 -5:00 Canada E%sT
2297 Zone America/Resolute 0 - -00 1947 Aug 31 # Resolute founded
2298 -6:00 NT_YK C%sT 2000 Oct 29 2:00
2299 -5:00 - EST 2001 Apr 1 3:00
2300 -6:00 Canada C%sT 2006 Oct 29 2:00
2301 -5:00 - EST 2007 Mar 11 3:00
2302 -6:00 Canada C%sT
2304 Zone America/Rankin_Inlet 0 - -00 1957 # Rankin Inlet founded
2305 -6:00 NT_YK C%sT 2000 Oct 29 2:00
2306 -5:00 - EST 2001 Apr 1 3:00
2307 -6:00 Canada C%sT
2309 Zone America/Cambridge_Bay 0 - -00 1920 # trading post est.?
2310 -7:00 NT_YK M%sT 1999 Oct 31 2:00
2311 -6:00 Canada C%sT 2000 Oct 29 2:00
2312 -5:00 - EST 2000 Nov 5 0:00
2313 -6:00 - CST 2001 Apr 1 3:00
2314 -7:00 Canada M%sT
2315 Zone America/Inuvik 0 - -00 1953 # Inuvik founded
2316 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00
2317 -7:00 NT_YK M%sT 1980
2318 -7:00 Canada M%sT
2319 Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20
2320 -9:00 NT_YK Y%sT 1965
2321 -9:00 Yukon Y%sT 1966 Feb 27 0:00
2322 -8:00 - PST 1980
2323 -8:00 Canada P%sT 2020 Nov 1
2324 -7:00 - MST
2325 Zone America/Dawson -9:17:40 - LMT 1900 Aug 20
2326 -9:00 NT_YK Y%sT 1965
2327 -9:00 Yukon Y%sT 1973 Oct 28 0:00
2328 -8:00 - PST 1980
2329 -8:00 Canada P%sT 2020 Nov 1
2330 -7:00 - MST
2337 # From Paul Eggert (2014-12-07):
2345 # S&P report that Baja was at -8:00 in 1922/1923.
2346 # S&P say the 1930 transition in Baja was 1930-11-16.
2348 # S&P report a transition at 1932-03-30 23:00, not 1932-04-01.
2350 # From Gwillim Law (2001-02-20):
2356 # From Heitor David Pinto (2024-08-04):
2358 # effect on 30 April....
2361 # In 1981, the decree changing Campeche, Yucatán and Quintana Roo to UTC-5
2365 # In 1982, the decree returning Campeche and Yucatán to UTC-6 specified that
2369 # Quintana Roo changed to UTC-6 on 4 January 1983 at 0:00, and again
2370 # to UTC-5 on 26 October 1997 at 2:00....
2374 # Durango, Coahuila, Nuevo León and Tamaulipas were set to UTC-7 on 1 January
2375 # 1922, and changed to UTC-6 on 10 June 1927. Then Durango, Coahuila and
2376 # Nuevo León (but not Tamaulipas) returned to UTC-7 on 15 November 1930,
2377 # observed DST in 1931, and changed again to UTC-6 on 1 April 1932....
2388 # Sinaloa and Nayarit to UTC-7 was published on 24 April, but it said that it
2393 # Baja California Sur, Sonora, Sinaloa and Nayarit never used UTC-8. The ...
2394 # 14 January 1949 ... change [to UTC-8] only occurred in Baja California.
2397 # In 1945, the decree changing Baja California to UTC-8 specified that it
2398 # would take effect on the third day from its publication.
2399 # It was published on 12 November, so it would take effect on 15 November....
2402 # In 1948, the decree changing Baja California to UTC-7 specified that it
2403 # would take effect on "this date". The decree was made on 13 March,
2408 # In 1949, the decree changing Baja California to UTC-8 was published on 13
2413 # Baja California also observed UTC-7 from 1 May to 24 September 1950,
2426 # From Paul Eggert (2024-08-18):
2427 # For now, maintain the slightly-different history for Baja California,
2431 # From Alan Perry (1996-02-15):
2435 # ------------- Begin Forwarded Message -------------
2441 # - Baja California Norte (the Mexico/BajaNorte TZ)
2442 # - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ)
2443 # - The rest of the country (the Mexico/General TZ)
2458 # -------------- End Forwarded Message --------------
2459 # From Paul Eggert (1996-06-12):
2461 # "Diario Oficial: Time Zone Changeover" (1996-01-04).
2462 # http://mexico-travel.com/extra/timezone_eng.html
2464 # From Rives McDow (1998-10-08):
2466 # (i.e. UTC -0600 and -0500 as of 1998-08-02).
2468 # From Rives McDow (2000-01-10):
2475 # <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17):
2481 # From Gwillim Law (2001-01-19):
2484 # January 17, 2000 - The Energy Secretary, Ernesto Martens, announced
2488 # [translated], says "summer time will ... take effect on the first Sunday
2491 # From Arthur David Olson (2001-01-25):
2492 # The 2001-01-24 traditional Washington Post contained the page one
2494 # http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html
2502 # (2001-02-01) shows Baja and Chihauhua as still using US DST rules,
2503 # and Sonora with no DST. This was reported by Jesper Nørgaard (2001-02-03).
2505 # From Paul Eggert (2001-03-03):
2507 # https://www.latimes.com/archives/la-xpm-2001-mar-03-mn-32561-story.html
2513 # * The decree does not affect federal-controlled facilities including
2518 # From Jesper Nørgaard (2001-04-01):
2528 # Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31)
2530 # From Reuters (2001-09-04):
2534 # next year.... The Supreme Court's ruling takes effect at 2:00
2539 # From Jesper Nørgaard Welen (2002-03-12):
2542 # http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20)
2545 # From Steffen Thorsen (2009-12-28):
2553 # http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/
2558 # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf
2562 # http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html
2565 # https://www.timeanddate.com/news/time/north-mexico-dst-change.html
2567 # From Arthur David Olson (2010-01-20):
2585 # From Steffen Thorsen (2014-12-08), translated by Gwillim Law:
2588 …http://www.unioncancun.mx/articulo/2014/12/04/medio-ambiente/congreso-aprueba-una-hora-mas-de-sol-…
2595 # From Steffen Thorsen (2015-01-14), translated by Gwillim Law:
2596 # http://sipse.com/novedades/confirman-aplicacion-de-nueva-zona-horaria-para-quintana-roo-132331.ht…
2597 # "...the new time zone will come into effect at two o'clock on the first Sunday
2602 # From Carlos Raúl Perasso (2015-02-02):
2607 # 1- Zona Centro (Central Zone): Corresponds to longitude 90 W,
2609 # 2- Zona Pacífico (Pacific Zone): Longitude 105 W, includes the
2612 # 3- Zona Noroeste (Northwest Zone): Longitude 120 W, includes the
2614 # 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state
2616 # 5- The islands, reefs and keys shall take their timezone from the
2619 # From Paul Eggert (2022-10-28):
2623 # and in addition changes all of Chihuahua to -06 with no DST.
2625 # From Heitor David Pinto (2022-11-28):
2627 # respective neighboring cities in the US, for example Juárez in UTC-7 with
2628 # DST, matching El Paso, and Ojinaga in UTC-6 with DST, matching Presidio....
2633 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
2634 Rule Mexico 1931 only - April 30 0:00 1:00 D
2635 Rule Mexico 1931 only - Oct 1 0:00 0 S
2636 Rule Mexico 1939 only - Feb 5 0:00 1:00 D
2637 Rule Mexico 1939 only - Jun 25 0:00 0 S
2638 Rule Mexico 1940 only - Dec 9 0:00 1:00 D
2639 Rule Mexico 1941 only - Apr 1 0:00 0 S
2640 Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War
2641 Rule Mexico 1944 only - May 1 0:00 0 S
2642 Rule Mexico 1950 only - Feb 12 0:00 1:00 D
2643 Rule Mexico 1950 only - Jul 30 0:00 0 S
2644 Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D
2645 Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S
2646 Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D
2647 Rule Mexico 2001 only - Sep lastSun 2:00 0 S
2648 Rule Mexico 2002 2022 - Apr Sun>=1 2:00 1:00 D
2649 Rule Mexico 2002 2022 - Oct lastSun 2:00 0 S
2652 Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 6:00u
2653 -6:00 - CST 1981 Dec 26 2:00
2654 -5:00 - EST 1983 Jan 4 0:00
2655 -6:00 Mexico C%sT 1997 Oct 26 2:00
2656 -5:00 Mexico E%sT 1998 Aug 2 2:00
2657 -6:00 Mexico C%sT 2015 Feb 1 2:00
2658 -5:00 - EST
2660 Zone America/Merida -5:58:28 - LMT 1922 Jan 1 6:00u
2661 -6:00 - CST 1981 Dec 26 2:00
2662 -5:00 - EST 1982 Nov 2 2:00
2663 -6:00 Mexico C%sT
2672 Zone America/Matamoros -6:30:00 - LMT 1922 Jan 1 6:00u
2673 -6:00 - CST 1988
2674 -6:00 US C%sT 1989
2675 -6:00 Mexico C%sT 2010
2676 -6:00 US C%sT
2678 Zone America/Monterrey -6:41:16 - LMT 1922 Jan 1 6:00u
2679 -7:00 - MST 1927 Jun 10
2680 -6:00 - CST 1930 Nov 15
2681 -7:00 Mexico M%sT 1932 Apr 1
2682 -6:00 - CST 1988
2683 -6:00 US C%sT 1989
2684 -6:00 Mexico C%sT
2686 Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 7:00u
2687 -7:00 - MST 1927 Jun 10
2688 -6:00 - CST 1930 Nov 15
2689 -7:00 Mexico M%sT 1932 Apr 1
2690 -6:00 Mexico C%sT 2001 Sep 30 2:00
2691 -6:00 - CST 2002 Feb 20
2692 -6:00 Mexico C%sT
2693 # Chihuahua (near US border - western side)
2696 # http://gaceta.diputados.gob.mx/PDF/65/2a022/nov/20221124-VII.pdf
2697 Zone America/Ciudad_Juarez -7:05:56 - LMT 1922 Jan 1 7:00u
2698 -7:00 - MST 1927 Jun 10
2699 -6:00 - CST 1930 Nov 15
2700 -7:00 Mexico M%sT 1932 Apr 1
2701 -6:00 - CST 1996
2702 -6:00 Mexico C%sT 1998
2703 -6:00 - CST 1998 Apr Sun>=1 3:00
2704 -7:00 Mexico M%sT 2010
2705 -7:00 US M%sT 2022 Oct 30 2:00
2706 -6:00 - CST 2022 Nov 30 0:00
2707 -7:00 US M%sT
2708 # Chihuahua (near US border - eastern side)
2711 # http://gaceta.diputados.gob.mx/PDF/65/2a022/nov/20221124-VII.pdf
2712 Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 7:00u
2713 -7:00 - MST 1927 Jun 10
2714 -6:00 - CST 1930 Nov 15
2715 -7:00 Mexico M%sT 1932 Apr 1
2716 -6:00 - CST 1996
2717 -6:00 Mexico C%sT 1998
2718 -6:00 - CST 1998 Apr Sun>=1 3:00
2719 -7:00 Mexico M%sT 2010
2720 -7:00 US M%sT 2022 Oct 30 2:00
2721 -6:00 - CST 2022 Nov 30 0:00
2722 -6:00 US C%sT
2724 Zone America/Chihuahua -7:04:20 - LMT 1922 Jan 1 7:00u
2725 -7:00 - MST 1927 Jun 10
2726 -6:00 - CST 1930 Nov 15
2727 -7:00 Mexico M%sT 1932 Apr 1
2728 -6:00 - CST 1996
2729 -6:00 Mexico C%sT 1998
2730 -6:00 - CST 1998 Apr Sun>=1 3:00
2731 -7:00 Mexico M%sT 2022 Oct 30 2:00
2732 -6:00 - CST
2734 Zone America/Hermosillo -7:23:52 - LMT 1922 Jan 1 7:00u
2735 -7:00 - MST 1927 Jun 10
2736 -6:00 - CST 1930 Nov 15
2737 -7:00 Mexico M%sT 1932 Apr 1
2738 -6:00 - CST 1942 Apr 24
2739 -7:00 - MST 1996
2740 -7:00 Mexico M%sT 1999
2741 -7:00 - MST
2744 Zone America/Mazatlan -7:05:40 - LMT 1922 Jan 1 7:00u
2745 -7:00 - MST 1927 Jun 10
2746 -6:00 - CST 1930 Nov 15
2747 -7:00 Mexico M%sT 1932 Apr 1
2748 -6:00 - CST 1942 Apr 24
2749 -7:00 - MST 1970
2750 -7:00 Mexico M%sT
2754 # From Alexander Krivenyshev (2010-04-21):
2756 # changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to
2766 …m_content&view=article&id=261:bahia-de-banderas-homologa-su-horario-con-el-del-centro-del-pais&cat…
2770 ….com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-…
2778 # From Arthur David Olson (2010-05-01):
2781 Zone America/Bahia_Banderas -7:01:00 - LMT 1922 Jan 1 7:00u
2782 -7:00 - MST 1927 Jun 10
2783 -6:00 - CST 1930 Nov 15
2784 -7:00 Mexico M%sT 1932 Apr 1
2785 -6:00 - CST 1942 Apr 24
2786 -7:00 - MST 1970
2787 -7:00 Mexico M%sT 2010 Apr 4 2:00
2788 -6:00 Mexico C%sT
2791 Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 7:00u
2792 -7:00 - MST 1924
2793 -8:00 - PST 1927 Jun 10
2794 -7:00 - MST 1930 Nov 15
2795 -8:00 - PST 1931 Apr 1
2796 -8:00 1:00 PDT 1931 Sep 30
2797 -8:00 - PST 1942 Apr 24
2798 -8:00 1:00 PWT 1945 Aug 14 23:00u
2799 -8:00 1:00 PPT 1945 Nov 15 # Peace
2800 -8:00 - PST 1948 Apr 5
2801 -8:00 1:00 PDT 1949 Jan 14
2802 -8:00 - PST 1950 May 1
2803 -8:00 1:00 PDT 1950 Sep 24
2804 -8:00 - PST 1951 Apr 29 2:00
2805 -8:00 1:00 PDT 1951 Sep 30 2:00
2806 -8:00 - PST 1952 Apr 27 2:00
2807 -8:00 1:00 PDT 1952 Sep 28 2:00
2808 -8:00 - PST 1954
2809 -8:00 CA P%sT 1961
2810 -8:00 - PST 1976
2811 -8:00 US P%sT 1996
2812 -8:00 Mexico P%sT 2001
2813 -8:00 US P%sT 2002 Feb 20
2814 -8:00 Mexico P%sT 2010
2815 -8:00 US P%sT
2816 # From Paul Eggert (2006-03-22):
2823 # DST-observance was a town-by-town matter back then. This concerns
2828 # From Paul Eggert (2015-10-08):
2834 # From Paul Eggert (2022-10-28):
2846 # For 1899 Milne gives -3:58:29.2.
2848 # From P Chan (2020-12-09 and 2020-12-11):
2849 # Standard time of GMT-4 was adopted in 1911.
2850 # Definition of Time Act, 1911 (1911-7) [1911-08-28]
2855 # DST was observed in 1942-44.
2856 # Defence (Daylight Saving) Regulations, 1942, 1942-04-13
2857 # Defence (Daylight Saving) (Repeal) Regulations, 1942, 1942-08-22
2858 # Defence (Daylight Saving) Regulations, 1943, 1943-04-16
2859 # Defence (Daylight Saving) (Repeal) Regulations, 1943, 1943-09-01
2860 # Defence (Daylight Saving) Regulations, 1944, 1944-03-21
2861 # [Defence (Daylight Saving) (Amendment) Regulations 1944, 1944-03-28]
2862 # Defence (Daylight Saving) (Repeal) Regulations, 1944, 1944-08-30
2864 # 1914-, Subsidiary Legis., Annual Vols. OCLC Number: 226290591
2865 # 1942: Image Nos. 527-528, 555-556
2866 # 1943: Image Nos. 178-179, 198
2867 # 1944: Image Nos. 113-115, 129
2870 # From Tim Parenti (2021-02-20):
2877 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
2878 Rule Barb 1942 only - Apr 19 5:00u 1:00 D
2879 Rule Barb 1942 only - Aug 31 6:00u 0 S
2880 Rule Barb 1943 only - May 2 5:00u 1:00 D
2881 Rule Barb 1943 only - Sep 5 6:00u 0 S
2882 Rule Barb 1944 only - Apr 10 5:00u 0:30 -
2883 Rule Barb 1944 only - Sep 10 6:00u 0 S
2884 Rule Barb 1977 only - Jun 12 2:00 1:00 D
2885 Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S
2886 Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D
2887 Rule Barb 1979 only - Sep 30 2:00 0 S
2888 Rule Barb 1980 only - Sep 25 2:00 0 S
2890 #STDOFF -3:58:29.2
2891 Zone America/Barbados -3:58:29 - LMT 1911 Aug 28 # Bridgetown
2892 -4:00 Barb A%sT 1944
2893 -4:00 Barb AST/-0330 1945
2894 -4:00 Barb A%sT
2898 # From P Chan (2020-11-03):
2901 # Definition of Time Ordinance, 1927 (No.4 of 1927) [1927-04-01]
2902 # Ordinances of British Honduras Passed in the Year 1927, p 19-20
2903 # https://books.google.com/books?id=LqEpAQAAMAAJ&pg=RA3-PA19
2905 # Definition of Time (Amendment) Ordinance, 1942 (No. 5 of 1942) [1942-06-27]
2906 # Ordinances of British Honduras Passed in the Year 1942, p 31-32
2907 # https://books.google.com/books?id=h6MpAQAAMAAJ&pg=RA6-PA95-IA44
2909 # Definition of Time Ordinance, 1945 (No. 19 of 1945) [1945-12-15]
2910 # Ordinances of British Honduras Passed in the Year 1945, p 49-50
2911 # https://books.google.com/books?id=xaMpAQAAMAAJ&pg=RA2-PP1
2913 # Definition of Time Ordinance, 1947 (No. 1 of 1947) [1947-03-11]
2914 # Ordinances of British Honduras Passed in the Year 1947, p 1-2
2915 # https://books.google.com/books?id=xaMpAQAAMAAJ&pg=RA3-PA1
2921 # Time (Definition of) (Amendment) Ordinance, 1968 (No. 13 of 1968) [1968-08-03]
2922 # https://books.google.com/books?id=xij7KEB_58wC&pg=RA1-PA428-IA9
2928 # From Paul Eggert (2020-11-03):
2933 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
2934 Rule Belize 1918 1941 - Oct Sat>=1 24:00 0:30 -0530
2935 Rule Belize 1919 1942 - Feb Sat>=8 24:00 0 CST
2936 Rule Belize 1942 only - Jun 27 24:00 1:00 CWT
2937 Rule Belize 1945 only - Aug 14 23:00u 1:00 CPT
2938 Rule Belize 1945 only - Dec 15 24:00 0 CST
2939 Rule Belize 1947 1967 - Oct Sat>=1 24:00 0:30 -0530
2940 Rule Belize 1948 1968 - Feb Sat>=8 24:00 0 CST
2941 Rule Belize 1973 only - Dec 5 0:00 1:00 CDT
2942 Rule Belize 1974 only - Feb 9 0:00 0 CST
2943 Rule Belize 1982 only - Dec 18 0:00 1:00 CDT
2944 Rule Belize 1983 only - Feb 12 0:00 0 CST
2946 Zone America/Belize -5:52:48 - LMT 1912 Apr 1
2947 -6:00 Belize %s
2951 # From Paul Eggert (2022-07-27):
2952 # For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower,
2956 # The transition to -04 was specified by:
2957 # 1930: The Time Zone Act, 1929 (1929: No. 39) [1929-11-08]
2958 # https://books.google.com/books?id=7tdMAQAAIAAJ&pg=RA54-PP1
2960 # From P Chan (2020-11-20):
2962 # Library - Digital Collection which includes The Royal Gazette (RG) until 1957
2968 # Daylight Saving Act, 1917 (1917 No. 13) [1917-04-02]
2969 # Bermuda Acts and Resolves 1917, p 37-38
2970 # https://books.google.com/books?id=M-lCAQAAMAAJ&pg=PA36-IA2
2971 # RG, 1917-04-04, p 6 [42340] gives the spring forward date.
2974 # Daylight Saving Act, 1918 (1918 No. 9) [1918-04-06]
2976 # https://books.google.com/books?id=K-lCAQAAMAAJ&pg=RA1-PA7
2985 # RG, 1942-01-08, p 2, 1942-10-12, p 2 , 1943-03-06, p 2, 1943-09-03, p 1,
2986 # 1944-02-29, p 6, 1944-09-20, p 2, 1945-02-13, p 2, 1945-11-03, p 1
2989 # RG, 1946-03-16 p 1,1946-04-13 p 1
2994 # RG, 1947-02-27, p 1, 1947-05-15, p 1, 1947-09-13, p 1, 1947-12-30, p 1
2996 # 1948-1952: fourth Sunday in May 02:00 to first Sunday in September 02:00
3002 # RG, 1948-04-13, p 1, 1948-05-22, p 1, 1948-09-04, p 1, 1949-05-21, p1,
3003 # 1949-09-03, p 1, 1950-05-27 p 1, 1950-09-02, p 1, 1951-05-27, p 1,
3004 # 1951-09-01, p 1, 1952-05-23, p 1, 1952-09-26, p 1, 1952-12-21, p 8
3006 # In 1953-1955, the House of Assembly rejected DST each year. [158996],
3007 # [162620], [166720] RG, 1953-05-02, p 1, 1954-04-01 p 1, 1955-03-12, p 1
3010 # Time Zone (Seasonal Variation) Act, 1956 (1956: No.44) [1956-05-25]
3011 # Bermuda Public Acts 1956, p 331-332
3015 # RG, 1956-12-13, p 1
3019 # https://books.google.com/books?id=r9hMAQAAIAAJ&pg=RA23-PA1
3023 # From Dan Jones, reporting in The Royal Gazette (2006-06-26):
3030 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
3031 Rule Bermuda 1917 only - Apr 5 24:00 1:00 -
3032 Rule Bermuda 1917 only - Sep 30 24:00 0 -
3033 Rule Bermuda 1918 only - Apr 13 24:00 1:00 -
3034 Rule Bermuda 1918 only - Sep 15 24:00 0 S
3035 Rule Bermuda 1942 only - Jan 11 2:00 1:00 D
3036 Rule Bermuda 1942 only - Oct 18 2:00 0 S
3037 Rule Bermuda 1943 only - Mar 21 2:00 1:00 D
3038 Rule Bermuda 1943 only - Oct 31 2:00 0 S
3039 Rule Bermuda 1944 1945 - Mar Sun>=8 2:00 1:00 D
3040 Rule Bermuda 1944 1945 - Nov Sun>=1 2:00 0 S
3041 Rule Bermuda 1947 only - May Sun>=15 2:00 1:00 D
3042 Rule Bermuda 1947 only - Sep Sun>=8 2:00 0 S
3043 Rule Bermuda 1948 1952 - May Sun>=22 2:00 1:00 D
3044 Rule Bermuda 1948 1952 - Sep Sun>=1 2:00 0 S
3045 Rule Bermuda 1956 only - May Sun>=22 2:00 1:00 D
3046 Rule Bermuda 1956 only - Oct lastSun 2:00 0 S
3049 #STDOFF -4:19:18.3
3050 Zone Atlantic/Bermuda -4:19:18 - LMT 1890 # Hamilton
3051 -4:19:18 Bermuda BMT/BST 1930 Jan 1 2:00
3052 -4:00 Bermuda A%sT 1974 Apr 28 2:00
3053 -4:00 Canada A%sT 1976
3054 -4:00 US A%sT
3058 # Milne gives -5:36:13.3 as San José mean time.
3060 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
3061 Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D
3062 Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S
3063 Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D
3064 # IATA SSIM (1991-09) says the following was at 1:00;
3066 Rule CR 1991 only - Jul 1 0:00 0 S
3067 Rule CR 1992 only - Mar 15 0:00 0 S
3070 #STDOFF -5:36:13.3
3071 Zone America/Costa_Rica -5:36:13 - LMT 1890 # San José
3072 -5:36:13 - SJMT 1921 Jan 15 # San José Mean Time
3073 -6:00 CR C%sT
3079 # From Paul Eggert (2013-02-21):
3080 # Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57
3081 # for the port, and -5:30 for meteorological observations.
3084 # From Arthur David Olson (1999-03-29):
3085 # The 1999-03-28 exhibition baseball game held in Havana, Cuba, between
3088 # During the game, play-by-play announcer Jim Hunter noted that
3091 # sleep on 1999-03-28 - when the announcers were in Cuba as it switched
3092 # to DST - and one more hour on 1999-04-04 - when the announcers will have
3095 # From Steffen Thorsen (2013-11-11):
3097 # years before. The correct date should be Sunday 2004-03-28 00:00 ...
3100 # From Evert van der Veer via Steffen Thorsen (2004-10-28):
3102 # From Paul Eggert (2006-03-22):
3103 # http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html
3109 # From Carlos A. Carnero Delgado (2005-11-12):
3110 # This year (just like in 2004-2005) there's no change in time zone
3114 # From Jesper Nørgaard Welen (2006-10-21):
3119 # watches should be set back one hour - going back to 00:00 hours - returning
3122 # From Paul Eggert (2007-03-02):
3128 # From Steffen Thorsen (2007-10-25):
3130 # earlier - on the last Sunday of October, just like in 2006.
3134 # http://www.prensalatina.com.mx/article.asp?ID={4CC32C1B-A9F7-42FB-8A07-8631AFC923AF}&language=ES
3137 # From Alex Krivenyshev (2007-10-25):
3145 # From Arthur David Olson (2008-03-09):
3150 # the time announced as "ocho cuarenta y cuatro" ("eight forty-four"),
3153 # From Steffen Thorsen (2008-03-12):
3154 # It seems that Cuba will start DST on Sunday, 2007-03-16...
3156 # http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm
3159 # https://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html
3164 # observed since 1963, but with the exception of 1970 - an exception
3171 # From Jesper Nørgaard Welen (2008-03-13):
3179 # From Arthur David Olson (2008-03-12):
3182 # From Alexander Krivenyshev (2009-03-04)
3183 # According to the Radio Reloj - Cuba will start Daylight Saving Time on
3184 # midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009-
3190 # From Arthur David Olson (2009-03-09)
3194 # the time was announced as "diez cinco" - the same time as here, indicating
3197 # From Steffen Thorsen (2011-03-08):
3198 # Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00
3206 # https://www.timeanddate.com/news/time/cuba-starts-dst-2011.html
3208 # From Steffen Thorsen (2011-10-30)
3210 # tonight, it has been delayed to 2011-11-13 at 01:00.
3213 # http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-green…
3216 # https://www.timeanddate.com/news/time/cuba-time-changes-2011.html
3218 # From Steffen Thorsen (2012-03-01)
3223 …ww.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-ve…
3226 # https://www.timeanddate.com/news/time/cuba-starts-dst-2012.html
3228 # From Steffen Thorsen (2012-11-03):
3230 # to standard time on 2012-11-04:
3231 …radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desd…
3232 # From Paul Eggert (2012-11-03):
3235 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
3236 Rule Cuba 1928 only - Jun 10 0:00 1:00 D
3237 Rule Cuba 1928 only - Oct 10 0:00 0 S
3238 Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D
3239 Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S
3240 Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D
3241 Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S
3242 Rule Cuba 1965 only - Jun 1 0:00 1:00 D
3243 Rule Cuba 1965 only - Sep 30 0:00 0 S
3244 Rule Cuba 1966 only - May 29 0:00 1:00 D
3245 Rule Cuba 1966 only - Oct 2 0:00 0 S
3246 Rule Cuba 1967 only - Apr 8 0:00 1:00 D
3247 Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S
3248 Rule Cuba 1968 only - Apr 14 0:00 1:00 D
3249 Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D
3250 Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S
3251 Rule Cuba 1972 1974 - Oct 8 0:00 0 S
3252 Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S
3253 Rule Cuba 1978 only - May 7 0:00 1:00 D
3254 Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S
3255 Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D
3256 Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D
3257 Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D
3258 Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D
3259 Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S
3260 Rule Cuba 1996 only - Oct 6 0:00s 0 S
3261 Rule Cuba 1997 only - Oct 12 0:00s 0 S
3262 Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D
3263 Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S
3264 Rule Cuba 2000 2003 - Apr Sun>=1 0:00s 1:00 D
3265 Rule Cuba 2004 only - Mar lastSun 0:00s 1:00 D
3266 Rule Cuba 2006 2010 - Oct lastSun 0:00s 0 S
3267 Rule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D
3268 Rule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D
3269 Rule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D
3270 Rule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D
3271 Rule Cuba 2011 only - Nov 13 0:00s 0 S
3272 Rule Cuba 2012 only - Apr 1 0:00s 1:00 D
3273 Rule Cuba 2012 max - Nov Sun>=1 0:00s 0 S
3274 Rule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D
3277 Zone America/Havana -5:29:28 - LMT 1890
3278 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT
3279 -5:00 Cuba C%sT
3283 # From Steffen Thorsen (2000-10-30):
3288 # From Paul Eggert (2000-12-04):
3289 # That URL (2000-10-26, in Spanish) says they planned to use US-style DST.
3291 # From Rives McDow (2000-12-01):
3301 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
3302 Rule DR 1966 only - Oct 30 0:00 1:00 EDT
3303 Rule DR 1967 only - Feb 28 0:00 0 EST
3304 Rule DR 1969 1973 - Oct lastSun 0:00 0:30 -0430
3305 Rule DR 1970 only - Feb 21 0:00 0 EST
3306 Rule DR 1971 only - Jan 20 0:00 0 EST
3307 Rule DR 1972 1974 - Jan 21 0:00 0 EST
3309 Zone America/Santo_Domingo -4:39:36 - LMT 1890
3310 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT
3311 -5:00 DR %s 1974 Oct 27
3312 -4:00 - AST 2000 Oct 29 2:00
3313 -5:00 US E%sT 2000 Dec 3 1:00
3314 -4:00 - AST
3318 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
3319 Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D
3320 Rule Salv 1987 1988 - Sep lastSun 0:00 0 S
3324 Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador
3325 -6:00 Salv C%sT
3329 # From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen:
3332 # says in an article dated 2006-04-19 that the Guatemalan government had
3335 # 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified).
3336 # From Paul Eggert (2006-06-22):
3337 # The Ministry of Energy and Mines, press release CP-15/2006
3338 # (2006-04-19), says DST ends at 24:00. See
3341 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
3342 Rule Guat 1973 only - Nov 25 0:00 1:00 D
3343 Rule Guat 1974 only - Feb 24 0:00 0 S
3344 Rule Guat 1983 only - May 21 0:00 1:00 D
3345 Rule Guat 1983 only - Sep 22 0:00 0 S
3346 Rule Guat 1991 only - Mar 23 0:00 1:00 D
3347 Rule Guat 1991 only - Sep 7 0:00 0 S
3348 Rule Guat 2006 only - Apr 30 0:00 1:00 D
3349 Rule Guat 2006 only - Oct 1 0:00 0 S
3351 Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5
3352 -6:00 Guat C%sT
3355 # From Gwillim Law (2005-04-15):
3358 # on the Web page of the Haitian Consulate in Chicago (2005-03-31),
3372 # "Port-au-Prince, March 31, 2005"
3374 # From Steffen Thorsen (2006-04-04):
3385 # From Stephen Colebourne (2007-02-22):
3388 # From Steffen Thorsen (2012-03-11):
3396 # From Arthur David Olson (2012-03-11):
3397 # The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to
3399 # Assume a US-style fall back as well.
3401 # From Steffen Thorsen (2013-03-10):
3406 # http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/
3409 # From Steffen Thorsen (2016-03-12):
3410 # Jean Antoine, editor of www.haiti-reference.com informed us that Haiti
3413 # https://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/
3414 # http://news.anmwe.com/haiti-lheure-nationale-ne-sera-ni-avancee-ni-reculee-cette-annee/
3416 # From Steffen Thorsen (2017-03-12):
3420 # https://www.haitilibre.com/en/news-20319-haiti-notices-time-change-in-haiti.html
3422 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
3423 Rule Haiti 1983 only - May 8 0:00 1:00 D
3424 Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D
3425 Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S
3428 Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D
3429 Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S
3430 Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D
3431 Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S
3432 Rule Haiti 2012 2015 - Mar Sun>=8 2:00 1:00 D
3433 Rule Haiti 2012 2015 - Nov Sun>=1 2:00 0 S
3434 Rule Haiti 2017 max - Mar Sun>=8 2:00 1:00 D
3435 Rule Haiti 2017 max - Nov Sun>=1 2:00 0 S
3437 Zone America/Port-au-Prince -4:49:20 - LMT 1890
3438 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT
3439 -5:00 Haiti E%sT
3444 # From Paul Eggert (2006-05-05):
3445 # worldtimezone.com reports a 2006-05-02 Spanish-language AP article
3451 # From Jesper Nørgaard Welen (2006-08-08):
3456 # From Paul Eggert (2006-08-08):
3457 # Also see Diario El Heraldo, The country returns to standard time (2006-08-08).
3459 # It mentions executive decree 18-2006.
3461 # From Steffen Thorsen (2006-08-17):
3466 # From Steffen Thorsen (2007-03-30):
3470 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
3471 Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D
3472 Rule Hond 1987 1988 - Sep lastSun 0:00 0 S
3473 Rule Hond 2006 only - May Sun>=1 0:00 1:00 D
3474 Rule Hond 2006 only - Aug Mon>=1 0:00 0 S
3476 Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr
3477 -6:00 Hond C%sT
3482 # Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an
3486 # Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but
3493 # Neita L. The politician in all of us. Jamaica Observer 2014-09-20
3494 # http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647
3497 #STDOFF -5:07:10.41
3498 Zone America/Jamaica -5:07:10 - LMT 1890 # Kingston
3499 -5:07:10 - KMT 1912 Feb # Kingston Mean Time
3500 -5:00 - EST 1974
3501 -5:00 US E%sT 1984
3502 -5:00 - EST
3506 Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France
3507 -4:04:20 - FFMT 1911 May 1 # Fort-de-France MT
3508 -4:00 - AST 1980 Apr 6
3509 -4:00 1:00 ADT 1980 Sep 28
3510 -4:00 - AST
3516 # From Steffen Thorsen (2005-04-12):
3518 # DST on Sunday 2005-04-10, in order to save energy because of
3520 # announced, only "September" but some sites also say "mid-September".
3522 …retaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06ab…
3523 # The Decree, no 23-2005 is available here:
3524 # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2005/Decreto%2023-2005%20Se%20adelanta%…
3526 # From Paul Eggert (2005-05-01):
3530 # From Gwillim Law (2005-04-21):
3536 # The northamerica file says that Nicaragua has been on UTC-6 continuously
3539 # the effect that we have indirect evidence that DST was observed in 2000.
3541 # From Jesper Nørgaard Welen (2005-11-02):
3542 # Nicaragua left DST the 2005-10-02 at 00:00 (local time).
3543 ….gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm
3544 # (2005-09-26)
3546 # From Jesper Nørgaard Welen (2006-05-05):
3553 # From Jesper Nørgaard Welen (2006-09-30):
3554 # http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf
3559 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S
3560 Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D
3561 Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S
3562 Rule Nic 2005 only - Apr 10 0:00 1:00 D
3563 Rule Nic 2005 only - Oct Sun>=1 0:00 0 S
3564 Rule Nic 2006 only - Apr 30 2:00 1:00 D
3565 Rule Nic 2006 only - Oct Sun>=1 1:00 0 S
3567 Zone America/Managua -5:45:08 - LMT 1890
3568 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time?
3569 -6:00 - CST 1973 May
3570 -5:00 - EST 1975 Feb 16
3571 -6:00 Nic C%sT 1992 Jan 1 4:00
3572 -5:00 - EST 1992 Sep 24
3573 -6:00 - CST 1993
3574 -5:00 - EST 1997
3575 -6:00 Nic C%sT
3582 Zone America/Panama -5:18:08 - LMT 1890
3583 -5:19:36 - CMT 1908 Apr 22 # Colón Mean Time
3584 -5:00 - EST
3597 # St Kitts-Nevis
3606 Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan
3607 -4:00 - AST 1942 May 3
3608 -4:00 US A%sT 1946
3609 -4:00 - AST
3614 Zone America/Miquelon -3:44:40 - LMT 1911 Jun 15 # St Pierre
3615 -4:00 - AST 1980 May
3616 -3:00 - %z 1987
3617 -3:00 Canada %z
3623 # (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the
3627 # From Brian Inglis (2007-04-28):
3628 # http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26]
3635 # From Paul Eggert (2014-08-19):
3636 # The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round. See:
3637 # http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm
3639 # From Chris Walton (2014-11-04):
3642 # http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm
3644 # From the Turks & Caicos Cabinet (2017-07-20), heads-up from Steffen Thorsen:
3647 # Time, during the winter months with effect from April 2018 ...
3648 # https://www.gov.uk/government/news/turks-and-caicos-post-cabinet-meeting-statement--3
3649 # From Paul Eggert (2017-08-26):
3650 # The date of effect of the spring 2018 change appears to be March 11,
3652 # by March 2018 for TCI. Magnetic Media. 2017-08-25.
3653 # http://magneticmediatv.com/2017/08/time-change-back-by-march-2018-for-tci/
3655 # From P Chan (2020-11-27):
3662 # From Tim Parenti (2020-12-05):
3670 # 02:00 -04, and thus the declared implementation time, it was still 01:00 EST
3671 # (-05), as DST in the Eastern US would not start until an hour later.
3675 # effect once clocks in the Eastern US had sprung forward, from 03:00 -04.
3677 # intervening hour, not wall clock times, as -04 was maintained throughout.
3680 Zone America/Grand_Turk -4:44:32 - LMT 1890
3681 #STDOFF -5:07:10.41
3682 -5:07:10 - KMT 1912 Feb # Kingston Mean Time
3683 -5:00 - EST 1979
3684 -5:00 US E%sT 2015 Mar 8 2:00
3685 -4:00 - AST 2018 Mar 11 3:00
3686 -5:00 US E%sT
3689 # coding: utf-8