Branch: Tag:

2012-05-18

2012-05-18 16:17:32 by Henrik Grubbström (Grubba) <grubba@grubba.org>

Updated to tzdata2012c.

1:   # <pre> - # @(#)northamerica 8.49 + # @(#)northamerica 8.54   # This file is in the public domain, so clarified as of   # 2009-05-17 by Arthur David Olson.   
1120:   # 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 + # <a href="http://www.ilovecreston.com/?p=articles&t=spec&ar=260"> + # http://www.ilovecreston.com/?p=articles&t=spec&ar=260 + # </a> + # 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 31 2:00 0 S + 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
1645:   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 31 2:00 0 S + 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
1728:      # 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 31 2:00 0 S + 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
1765:      # 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 31 2:00 0 S + 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
1795:   # 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. + # <a href="http://www.ilovecreston.com/?p=articles&t=spec&ar=260"> + # http://www.ilovecreston.com/?p=articles&t=spec&ar=260 + # </a> + # 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. + # <a href="http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56"> + # http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56 + # </a> +  + # 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. + # <a href="http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html"> + # http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html + # </a> +  + # 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 31 2:00 0 S + 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
1813:    -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):
2690:   # <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html">   # http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html   # </a> + # + # 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) + # <a href="http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html"> + # http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html + # </a> + # + # Our page: + # <a href="http://www.timeanddate.com/news/time/cuba-time-changes-2011.html"> + # http://www.timeanddate.com/news/time/cuba-time-changes-2011.html + # </a> + # + # 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): + # <a href="http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril"> + # http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril + # </a> + # + # Our info on it: + # <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html"> + # http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html + # </a>      # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S   Rule Cuba 1928 only - Jun 10 0:00 1:00 D
2721:   Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D   Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S   Rule Cuba 2000 2004 - Apr Sun>=1 0:00s 1:00 D - Rule Cuba 2006 max - Oct lastSun 0:00s 0 S + 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 2012 max - Mar Sun>=8 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 - Oct lastSun 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
2860:   # 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. + # + # (Sources in French): + # <a href="http://www.alterpresse.org/spip.php?article12510"> + # http://www.alterpresse.org/spip.php?article12510 + # </a> + # <a href="http://radiovision2000haiti.net/home/?p=13253"> + # http://radiovision2000haiti.net/home/?p=13253 + # </a> + # + # Our coverage: + # <a href="http://www.timeanddate.com/news/time/haiti-dst-2012.html"> + # http://www.timeanddate.com/news/time/haiti-dst-2012.html + # </a>    -  + # 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 XXX. + # Do not yet assume that the change carries forward past 2012 XXX. +    # 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
2871:   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 only - Mar Sun>=8 2:00 1:00 D + Rule Haiti 2012 only - 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