"Gwillim Law" <RLAW@nc.rr.com> writes:
A correspondent, Risto O. Nykanen, wrote me that Haiti is now on DST.
Thanks for the heads-up. It's interesting that they don't address the issue of whether this is a permanent change, or is just for this one year. For now, I'll assume the latter. Here is a proposed change to the northamerica file that will correct the error for today's timestamps in the current tzdata for Haiti. This change also fixes the transitions for the United States in 1883, improves some references, and removes my email address from that file (due to spam concerns). This patch assumes the patch that I circulated a few days ago on this list, which addressed our current problems with Nicaraguan time stamps. --- northamerica 2005/04/12 08:11:31 2005.5.0.1 +++ northamerica 2005/04/17 06:29:46 2005.5.0.2 @@ -5,7 +5,7 @@ # go ahead and edit the file (and please send any changes to # tz@elsie.nci.nih.gov for general use in the future). -# From Paul Eggert <eggert@twinsun.com> (1999-03-22): +# From Paul Eggert (1999-03-22): # A reliable and entertaining source about time zones is # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). @@ -24,12 +24,16 @@ # His proposal was adopted by the railroads on 1883-11-18 at 12:00, # and the most of the country soon followed suit. -# From Paul Eggert <eggert@twinsun.com> (1995-12-19): +# From Paul Eggert (2005-04-16): +# That 1883 transition occurred at 12:00 new time, not at 12:00 old time. +# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). + +# From Paul Eggert (1995-12-19): # A good source for time zone historical data in the US is # Thomas G. Shanks, The American Atlas (5th edition), # San Diego: ACS Publications, Inc. (1991). # Make sure you have the errata sheet; the book is somewhat useless without it. -# It is the source for the US and Puerto Rico entries below. +# It is the source for most of the pre-1991 US and Puerto Rico entries below. # From Paul Eggert (2001-03-06): # Daylight Saving Time was first suggested as a joke by Benjamin Franklin @@ -48,7 +52,8 @@ # to push people into bed earlier, and get them up earlier, to make # them healthy, wealthy and wise in spite of themselves. # -# -- Robertson Davies, The Diary of Samuel Marchbanks (1947), XIX, Sunday +# -- Robertson Davies, The diary of Samuel Marchbanks, +# Clarke, Irwin (1947), XIX, Sunday # # For more about the first ten years of DST in the United States, see # Robert Garland's <a href="http://www.clpgh.org/exhibit/dst.html"> @@ -222,7 +227,7 @@ Rule NYC 1921 1966 - Apr lastSun 2:00 1: Rule NYC 1921 1954 - Sep lastSun 2:00 0 S Rule NYC 1955 1966 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:00 +Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 -5:00 US E%sT 1920 -5:00 NYC E%sT 1942 -5:00 US E%sT 1946 @@ -248,7 +253,7 @@ Rule Chicago 1922 1966 - Apr lastSun 2:0 Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:00 +Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 -6:00 US C%sT 1920 -6:00 Chicago C%sT 1936 Mar 1 2:00 -5:00 - EST 1936 Nov 15 2:00 @@ -257,7 +262,7 @@ Zone America/Chicago -5:50:36 - LMT 1883 -6:00 Chicago C%sT 1967 -6:00 US C%sT # Oliver County, ND switched from mountain to central time on 1992-10-25. -Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:00 +Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 -7:00 US M%sT 1992 Oct 25 02:00 -6:00 US C%sT @@ -276,7 +281,7 @@ Rule Denver 1921 only - May 22 2:00 0 S Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D Rule Denver 1965 1966 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00 +Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 -7:00 US M%sT 1920 -7:00 Denver M%sT 1942 -7:00 US M%sT 1946 @@ -296,7 +301,7 @@ Rule CA 1950 1966 - Apr lastSun 2:00 1:0 Rule CA 1950 1961 - Sep lastSun 2:00 0 S Rule CA 1962 1966 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:00 +Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 -8:00 US P%sT 1946 -8:00 CA P%sT 1967 -8:00 US P%sT @@ -423,7 +428,7 @@ Zone Pacific/Honolulu -10:31:26 - LMT 19 # Shanks says the 1944 experiment came to an end on 1944-03-17. # Go with the Arizona State Library instead. -Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 12:00 +Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 -7:00 US M%sT 1944 Jan 1 00:01 -7:00 - MST 1944 Apr 1 00:01 -7:00 US M%sT 1944 Oct 1 00:01 @@ -447,7 +452,7 @@ Link America/Denver America/Shiprock # switched four weeks late in 1974. # # Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:00 +Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 -8:00 US P%sT 1923 May 13 2:00 -7:00 US M%sT 1974 -7:00 - MST 1974 Feb 3 2:00 @@ -491,7 +496,7 @@ Rule Indianapolis 1941 only - Jun 22 2:0 Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D # Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:00 +Zone America/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 -6:00 US C%sT 1920 -6:00 Indianapolis C%sT 1942 -6:00 US C%sT 1946 @@ -511,7 +516,7 @@ Rule Marengo 1951 only - Sep lastSun 2:0 Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:00 +Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 -6:00 US C%sT 1951 -6:00 Marengo C%sT 1961 Apr 30 2:00 -5:00 - EST 1969 @@ -532,7 +537,7 @@ Rule Starke 1955 1956 - Oct lastSun 2:00 Rule Starke 1957 1958 - Sep lastSun 2:00 0 S Rule Starke 1959 1961 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:00 +Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 -6:00 US C%sT 1947 -6:00 Starke C%sT 1962 Apr 29 2:00 -5:00 - EST 1963 Oct 27 2:00 @@ -541,7 +546,7 @@ Zone America/Indiana/Knox -5:46:30 - LMT # # Switzerland County, Indiana, last observed DST in 1972. # Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:00 +Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 -6:00 US C%sT 1954 Apr 25 2:00 -5:00 - EST 1969 -5:00 US E%sT 1973 @@ -558,7 +563,7 @@ Rule Louisville 1946 only - Jun 2 2:00 0 Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Louisville -5:43:02 - LMT 1883 Nov 18 12:00 +Zone America/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 -6:00 US C%sT 1921 -6:00 Louisville C%sT 1942 -6:00 US C%sT 1946 @@ -595,7 +600,7 @@ Link America/Louisville America/Kentucky # Federal Register 65, 160 (2000-08-17), page 50154-50158. # </a> # -Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:00 +Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 -6:00 US C%sT 1946 -6:00 - CST 1968 -6:00 US C%sT 2000 Oct 29 2:00 @@ -704,7 +709,7 @@ Link Pacific/Honolulu HST ################################################################################ -# From Paul Eggert <eggert@twinsun.com> (1999-10-29): +# From Paul Eggert (1999-10-29): # A good source for time zone historical data outside the US is # Thomas G. Shanks, The International Atlas (5th edition), # San Diego: ACS Publications, Inc. (1999). @@ -761,7 +766,7 @@ Link Pacific/Honolulu HST # T: de Terre-Neuve # Y: du Yukon Yukon # -# From Paul Eggert <eggert@twinsun.com> (1994-11-22): +# From Paul Eggert (1994-11-22): # Alas, this sort of thing must be handled by localization software. # Unless otherwise specified, the data for Canada are all from Shanks. @@ -1873,6 +1878,26 @@ Zone America/Guatemala -6:02:04 - LMT 19 -6:00 Guat C%sT # Haiti +# From Gwillim Law (2005-04-15): +# Risto O. Nykanen wrote me that Haiti is now on DST. +# I searched for confirmation, and I found a +# <a href="http://www.haitianconsulate.org/time.doc"> press release +# on the Web page of the Haitian Consulate in Chicago (2005-03-31), +# </a>. Translated from French, it says: +# +# "The Prime Minister's Communication Office notifies the public in general +# and the press in particular that, following a decision of the Interior +# Ministry and the Territorial Collectivities [I suppose that means the +# provinces], Haiti will move to Eastern Daylight Time in the night from next +# Saturday the 2nd to Sunday the 3rd. +# +# "Consequently, the Prime Minister's Communication Office wishes to inform +# the population that the country's clocks will be set forward one hour +# starting at midnight. This provision will hold until the last Saturday in +# October 2005. +# +# "Port-au-Prince, March 31, 2005" + # 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 @@ -1880,6 +1905,8 @@ Rule Haiti 1983 1987 - Oct lastSun 0:00 # Shanks says AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. Go with IATA. Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S +Rule Haiti 2005 only - Apr Sun>=1 0:00 1:00 D +Rule Haiti 2005 only - Oct lastSun 0:00 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