diff options
Diffstat (limited to 'timezone/northamerica')
| -rw-r--r-- | timezone/northamerica | 614 |
1 files changed, 416 insertions, 198 deletions
diff --git a/timezone/northamerica b/timezone/northamerica index 73e2470e0b..3d80c5e3c2 100644 --- a/timezone/northamerica +++ b/timezone/northamerica @@ -1,4 +1,4 @@ -# @(#)northamerica 8.1 +# @(#)northamerica 8.10 # <pre> # also includes Central America and the Caribbean @@ -30,12 +30,12 @@ # 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): +# From Paul Eggert (2006-03-22): # A good source for time zone historical data in the US is # Thomas G. Shanks, The American Atlas (5th edition), # San Diego: ACS Publications, Inc. (1991). # Make sure you have the errata sheet; the book is somewhat useless without it. -# It is the source for most of the pre-1991 US and Puerto Rico entries below. +# It is the source for most of the pre-1991 US entries below. # From Paul Eggert (2001-03-06): # Daylight Saving Time was first suggested as a joke by Benjamin Franklin @@ -229,7 +229,7 @@ Zone PST8PDT -8:00 US P%sT # Public law 106-564 (2000-12-23) introduced the abbreviation # "Chamorro Standard Time" for time in Guam and the Northern Marianas. # See the file "australasia". - + # From Arthur David Olson, 2005-08-09 # The following was signed into law on 2005-08-08. # @@ -274,7 +274,7 @@ Zone PST8PDT -8:00 US P%sT # set their watches and clocks on Eastern time." It quotes H.H. "Bubba" # Roberts, city administrator in Phenix City. as saying "We are in the Central # time zone, but we do go by the Eastern time zone because so many people work -# in Columbus." +# in Columbus." # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule NYC 1920 only - Mar lastSun 2:00 1:00 D @@ -301,6 +301,13 @@ Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 # Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, # western Tennessee, most of Texas, Wisconsin +# From Larry M. Smith (2006-04-26) re Wisconsin: +# http://www.legis.state.wi.us/statutes/Stat0175.pdf ... +# is currently enforced at the 01:00 time of change. Because the local +# "bar time" in the state corresponds to 02:00, a number of citations +# are issued for the "sale of class 'B' alcohol after prohibited +# hours" within the deviated hour of this change every year.... + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Chicago 1920 only - Jun 13 2:00 1:00 D Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S @@ -321,14 +328,16 @@ Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 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 -# From Paul Eggert (2006-01-20): -# The following is not implemented yet. -# What is the most populous city in that area? -# From http://www.statoids.com/tus.html (2006-01-20): -# 2003-10-26 02:00: All of Morton County, ND, and the part of Sioux -# County, ND east of ND route 31 moved from MT to CT. (The area -# around Fort Yates in Sioux County and the area around Mandan in -# Morton County were already in CT.) +# Morton County, ND, switched from mountain to central time on +# 2003-10-26, except for the area around Mandan which was already central time. +# See <http://dmses.dot.gov/docimages/p63/135818.pdf>. +# Officially this switch also included part of Sioux County, and +# Jones, Mellette, and Todd Counties in South Dakota; +# but in practice these other counties were already observing central time. +# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. +Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 + -7:00 US M%sT 2003 Oct 26 02:00 + -6:00 US C%sT # US mountain time, represented by Denver # @@ -407,7 +416,8 @@ Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18 Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18 -9:59:36 - LMT 1900 Aug 20 12:00 -10:00 - CAT 1942 - -10:00 US CAT/CAWT 1946 + -10:00 US CAT/CAWT 1945 Aug 14 23:00u + -10:00 US CAT/CAPT 1946 # Peace -10:00 - CAT 1967 Apr -10:00 - AHST 1969 -10:00 US AH%sT 1983 Oct 30 2:00 @@ -527,9 +537,9 @@ Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 # For a map of Indiana's time zone regions, see: # <a href="http://www.mccsc.edu/time.html"> # What time is it in Indiana? -# </a> (2005-10-30) +# </a> (2006-03-01) # -# From Paul Eggert (2006-01-20): +# From Paul Eggert (2006-03-22): # Since 1970, most of Indiana has been like America/Indiana/Indianapolis, # with the following exceptions: # @@ -549,6 +559,7 @@ Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 # # Shanks partitioned Indiana into 345 regions, each with its own time history, # and wrote ``Even newspaper reports present contradictory information.'' +# Those Hoosiers! Such a flighty and changeable people! # Fortunately, most of the complexity occurred before our cutoff date of 1970. # # Other than Indianapolis, the Indiana place names are so nondescript @@ -558,8 +569,10 @@ Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 # From Paul Eggert (2005-08-16): # http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006. +# From Nathan Stratton Treadway (2006-03-30): +# http://www.dot.gov/affairs/dot0406.htm [3705 B] # From Deborah Goldsmith (2006-01-18): -# http://dmses.dot.gov/docimages/pdf95/382329_web.pdf +# http://dmses.dot.gov/docimages/pdf95/382329_web.pdf [2.9 MB] # From Paul Eggert (2006-01-20): # It says "DOT is relocating the time zone boundary in Indiana to move Starke, # Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the @@ -625,7 +638,7 @@ Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 -5:00 US E%sT 1971 -5:00 - EST 2006 Apr 2 2:00 -6:00 US C%sT -# +# # Pike County, Indiana moved from central to eastern time in 1977, # then switched back in 2006. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER @@ -818,10 +831,10 @@ Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 ################################################################################ -# 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). +# From Paul Eggert (2006-03-22): +# A good source for time zone historical data outside the U.S. is +# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), +# San Diego: ACS Publications, Inc. (2003). # # Gwillim Law writes that a good source # for recent time zone data is the International Air Transport @@ -829,8 +842,8 @@ Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 # published semiannually. Law sent in several helpful summaries # of the IATA's data after 1990. # -# Except where otherwise noted, Shanks is the source for entries through 1990, -# and IATA SSIM is the source for entries after 1990. +# Except where otherwise noted, Shanks & Pottenger is the source for +# entries through 1990, and IATA SSIM is the source for entries afterwards. # # Other sources occasionally used include: # @@ -878,9 +891,51 @@ Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 # 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. - -# From Paul Eggert (2005-12-21): +# Unless otherwise specified, the data for Canada are all from Shanks +# & Pottenger. + +# From Chris Walton (2006-04-01): +# The British Columbia government announced yesterday that it will +# adjust daylight savings next year to align with changes in the +# U.S. and the rest of Canada.... +# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm + +# From Chris Walton (2006-04-25): +# Daylight saving time will be extended by four weeks starting in 2007.... +# Here is a news release which was issued today by the Nova Scotia government: +# http://www.gov.ns.ca/news/details.asp?id=20060425004 + +# From Chris Walton (2006-06-26): +# [For New Brunswick] the new legislation dictates that the time change is to +# be done at 02:00 instead of 00:01. +# http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf +# ... +# Manitoba has traditionally changed the clock every fall at 03:00. +# As of 2006, the transition is to take place one hour earlier at 02:00. +# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php +# ... +# [Alberta, Ontario, Quebec] will follow US rules. +# http://www.qp.gov.ab.ca/documents/Acts/2006CH03_UNPR.cfm?frm_isbn=0779744934 +# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm +# http://www.assnat.qc.ca/eng/37legislature2/Projets-loi/Publics/06-a002.htm +# ... +# P.E.I. will follow US rules. The new legislation is not law yet. +# It passed first reading on April 20.... +# http://www.assembly.pe.ca/bills/pdf_first/62/3/bill-101.pdf +# ... +# Province of Newfoundland and Labrador.... The change is being considered. +# http://www.releases.gov.nl.ca/releases/2006/mpa/0331n01.htm +# ... +# N.W.T. will follow US rules. Whoever maintains the government web site +# does not seem to believe in bookmarks. To see the news release, click the +# following link and search for "Daylight Savings Time Change". Press the +# "Daylight Savings Time Change" link; it will fire off a popup using +# JavaScript. +# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive + + + +# From Paul Eggert (2006-04-25): # H. David Matthews and Mary Vincent's map # <a href="http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp"> # "It's about TIME", _Canadian Geographic_ (September-October 1998) @@ -892,25 +947,10 @@ Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 # information about standard and daylight saving time zones in Canada. # </a> (updated periodically). # Its unofficial information is often taken from Matthews and Vincent. -# -# CBC News reported that Ontario and Manitoba have announced plans to -# follow the US change, and that Nova Scotia is considering it; see -# <http://www.cbc.ca/news/background/daylightsavingtime/> (2005-10-21). -# CBC news also reported that Prince Edward Island is the first -# province in Atlantic Canada to follow the US change, and that Quebec -# had agreed; see <http://www.cbc.ca/pei/story/pe_daylight_20051207.html> -# (2005-12-07). -# -# To reflect all this, the Canada and Winn rules have been adjusted to -# agree with the 2007 US change. This means we assume most of Canada -# will fall into line. However, Alberta, British Columbia, -# Newfoundland, Northwest Territories, and Yukon already have separate -# rules in our database, so for now we'll leave them alone, which -# means that we currently assume these regions will not change their -# rules and will disagree with the US starting in 2007. This -# assumption is probably incorrect, with the possible exception of -# Newfoundland. We plan to adjust the Edm, Vanc, StJohns, and NT_YK -# rules as the corresponding provinces make their announcements. + +# From Paul Eggert (2006-06-27): +# For now, assume all of DST-observing Canada will fall into line with the +# new US DST rules, # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Canada 1918 only - Apr 14 2:00 1:00 D @@ -925,7 +965,7 @@ Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D Rule Canada 2007 max - Nov Sun>=1 2:00 0 S -# Newfoundland (and far southeast Labrador) +# Newfoundland and Labrador # From Paul Eggert (2000-10-02): # Matthews and Vincent (1998) write that Labrador should use NST/NDT, @@ -936,20 +976,21 @@ Rule Canada 2007 max - Nov Sun>=1 2:00 0 S # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule StJohns 1917 only - Apr 8 2:00 1:00 D Rule StJohns 1917 only - Sep 17 2:00 0 S -# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks. +# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. Rule StJohns 1919 only - May 5 23:00 1:00 D Rule StJohns 1919 only - Aug 12 23:00 0 S -# For 1931-1935 Whitman gives Apr same date; go with Shanks. +# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S -# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks. +# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & +# Pottenger. Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S # Whitman gives the following transitions: # 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 -# but go with Shanks and assume they used Canadian rules. +# but go with Shanks & Pottenger and assume they used Canadian rules. # For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives -# Apr 30 - Sep 24; go with Shanks. +# Apr 30 - Sep 24; go with Shanks & Pottenger. Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D @@ -959,9 +1000,12 @@ Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S # INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches # at 00:01 local time. For now, assume it started in 1987. Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D -Rule StJohns 1987 max - Oct lastSun 0:01 0 S +Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD -Rule StJohns 1989 max - Apr Sun>=1 0:01 1:00 D +Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D +Rule StJohns 2007 max - Mar Sun>=8 0:01 1:00 D +Rule StJohns 2007 max - Nov Sun>=1 0:01 0 S +# # St John's has an apostrophe, but Posix file names can't have apostrophes. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/St_Johns -3:30:52 - LMT 1884 @@ -989,12 +1033,13 @@ Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay # west Labrador, Nova Scotia, Prince Edward I -# From Paul Eggert (1996-06-12): -# Shanks writes that since 1970 most of this region has been like Halifax. -# Many locales did not observe peacetime DST until 1972; +# From Paul Eggert (2006-03-22): +# Shanks & Pottenger write that since 1970 most of this region has been like +# Halifax. Many locales did not observe peacetime DST until 1972; # Glace Bay, NS is the largest that we know of. -# Shanks also writes that Liverpool, NS was the only town in Canada to observe -# DST in 1971 but not 1970; for now we'll assume this is a typo. +# Shanks & Pottenger also write that Liverpool, NS was the only town +# in Canada to observe DST in 1971 but not 1970; for now we'll assume +# this is a typo. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Halifax 1916 only - Apr 1 0:00 1:00 D @@ -1060,10 +1105,7 @@ Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 # <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> says they change at 00:01, and # <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it # clear that this has been the case since at least 1993. -# For now, assume it started in 1993. The Office of the Premier announced -# <http://www.gnb.ca/cnb/news/pre/2005e1737pr.htm> (2005-12-23) -# that they will bring forward proposed amendments to harmonize with the US; -# for now assume that this will happen, but they'll still switch at 00:01. +# For now, assume it started in 1993. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D @@ -1076,11 +1118,9 @@ Rule Moncton 1940 only - May 19 1:00 1:00 D Rule Moncton 1941 only - May 4 1:00 1:00 D Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S -Rule Moncton 1956 1972 - Oct lastSun 2:00 0 S +Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S -Rule Moncton 2007 max - Mar Sun>=8 0:01 1:00 D -Rule Moncton 2007 max - Nov Sun>=1 0:01 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Moncton -4:19:08 - LMT 1883 Dec 9 -5:00 - EST 1902 Jun 15 @@ -1089,13 +1129,79 @@ Zone America/Moncton -4:19:08 - LMT 1883 Dec 9 -4:00 Canada A%sT 1946 -4:00 Moncton A%sT 1973 -4:00 Canada A%sT 1993 - -4:00 Moncton A%sT + -4:00 Moncton A%sT 2007 + -4:00 Canada A%sT -# Ontario, Quebec +# Quebec + +# From Paul Eggert (2006-07-09): +# Shanks & Pottenger write that since 1970 most of Quebec has been +# like Montreal. + +# From Paul Eggert (2006-06-27): +# Matthews and Vincent (1998) also write that Quebec east of the -63 +# meridian is supposed to observe AST, but residents as far east as +# Natashquan use EST/EDT, and residents east of Natashquan use AST. +# In "Official time in Quebec" the Quebec department of justice writes in +# http://www.justice.gouv.qc.ca/english/publications/generale/temps-regl-1-a.htm +# that "The residents of the Municipality of the +# Cote-Nord-du-Golfe-Saint-Laurent and the municipalities of Saint-Augustin, +# Bonne-Esperance and Blanc-Sablon apply the Official Time Act as it is +# written and use Atlantic standard time all year round. The same applies to +# the residents of the Native facilities along the lower North Shore." +# <http://www.assnat.qc.ca/eng/37legislature2/Projets-loi/Publics/06-a002.htm> +# says this common practice was codified into law as of 2007. +# For lack of better info, guess this practice began around 1970, contra to +# Shanks & Pottenger who have this region observing AST/ADT. -# From Paul Eggert (1996-06-12): -# Shanks writes that since 1970 most of Ontario has been like Toronto, -# and most of Quebec has been like Montreal. +# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S +Rule Mont 1917 only - Mar 25 2:00 1:00 D +Rule Mont 1917 only - Apr 24 0:00 0 S +Rule Mont 1919 only - Mar 31 2:30 1:00 D +Rule Mont 1919 only - Oct 25 2:30 0 S +Rule Mont 1920 only - May 2 2:30 1:00 D +Rule Mont 1920 1922 - Oct Sun>=1 2:30 0 S +Rule Mont 1921 only - May 1 2:00 1:00 D +Rule Mont 1922 only - Apr 30 2:00 1:00 D +Rule Mont 1924 only - May 17 2:00 1:00 D +Rule Mont 1924 1926 - Sep lastSun 2:30 0 S +Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D +# The 1927-to-1937 rules can be expressed more simply as +# Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D +# Rule Mont 1927 1937 - Sep lastSat 24:00 0 S +# The rules below avoid use of 24:00 +# (which pre-1998 versions of zic cannot handle). +Rule Mont 1927 only - May 1 0:00 1:00 D +Rule Mont 1927 1932 - Sep lastSun 0:00 0 S +Rule Mont 1928 1931 - Apr lastSun 0:00 1:00 D +Rule Mont 1932 only - May 1 0:00 1:00 D +Rule Mont 1933 1940 - Apr lastSun 0:00 1:00 D +Rule Mont 1933 only - Oct 1 0:00 0 S +Rule Mont 1934 1939 - Sep lastSun 0:00 0 S +Rule Mont 1946 1973 - Apr lastSun 2:00 1:00 D +Rule Mont 1945 1948 - Sep lastSun 2:00 0 S +Rule Mont 1949 1950 - Oct lastSun 2:00 0 S +Rule Mont 1951 1956 - Sep lastSun 2:00 0 S +Rule Mont 1957 1973 - Oct lastSun 2:00 0 S + +# Zone NAME GMTOFF RULES FORMAT [UNTIL] +Zone America/Blanc-Sablon -3:48:28 - LMT 1884 + -4:00 Canada A%sT 1970 + -4:00 - AST +Zone America/Montreal -4:54:16 - LMT 1884 + -5:00 Mont E%sT 1918 + -5:00 Canada E%sT 1919 + -5:00 Mont E%sT 1942 Feb 9 2:00s + -5:00 Canada E%sT 1946 + -5:00 Mont E%sT 1974 + -5:00 Canada E%sT + + +# Ontario + +# From Paul Eggert (2006-07-09): +# Shanks & Pottenger write that since 1970 most of Ontario has been like +# Toronto. # Thunder Bay skipped DST in 1973. # Many smaller locales did not observe peacetime DST until 1974; # Nipigon (EST) and Rainy River (CST) are the largest that we know of. @@ -1125,50 +1231,46 @@ Zone America/Moncton -4:19:08 - LMT 1883 Dec 9 # says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. # Officially Atikokan is therefore on CST/CDT, and most likely this report # concerns a non-official time observed as a matter of local practice. -# For what it's worth, Shanks says that Atikokan has agreed with -# Rainy River ever since standard time was introduced. - +# # From Paul Eggert (2000-10-02): # Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and # New Osnaburgh observe CST all year, that Big Trout Lake observes # CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in # violation of the official Ontario rules. -# They also write that Quebec east of the -63 meridian is supposed to -# observe AST, but residents as far east as Natashquan use EST/EDT, -# and residents east of Natashquan use AST. -# We probably need Zones for far east Quebec and for Atikokan, -# but we don't know when their practices started. +# +# From Paul Eggert (2006-07-09): +# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the +# 2005-07-21 Chronicle-Journal, which said: +# +# The clocks in Atikokan stay set on standard time year-round. +# This means they spend about half the time on central time and +# the other half on eastern time. +# +# For the most part, the system works, Mayor Dennis Brown said. +# +# "The majority of businesses in Atikokan deal more with Eastern +# Canada, but there are some that deal with Western Canada," he +# said. "I don't see any changes happening here." +# +# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang +# [New Osnaburgh] follow the same practice." -# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule Mont 1917 only - Mar 25 2:00 1:00 D -Rule Mont 1917 only - Apr 24 0:00 0 S -Rule Mont 1919 only - Mar 31 2:30 1:00 D -Rule Mont 1919 only - Oct 25 2:30 0 S -Rule Mont 1920 only - May 2 2:30 1:00 D -Rule Mont 1920 1922 - Oct Sun>=1 2:30 0 S -Rule Mont 1921 only - May 1 2:00 1:00 D -Rule Mont 1922 only - Apr 30 2:00 1:00 D -Rule Mont 1924 only - May 17 2:00 1:00 D -Rule Mont 1924 1926 - Sep lastSun 2:30 0 S -Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D -# The 1927-to-1937 rules can be expressed more simply as -# Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D -# Rule Mont 1927 1937 - Sep lastSat 24:00 0 S -# The rules below avoid use of 24:00 -# (which pre-1998 versions of zic cannot handle). -Rule Mont 1927 only - May 1 0:00 1:00 D -Rule Mont 1927 1932 - Sep lastSun 0:00 0 S -Rule Mont 1928 1931 - Apr lastSun 0:00 1:00 D -Rule Mont 1932 only - May 1 0:00 1:00 D -Rule Mont 1933 1940 - Apr lastSun 0:00 1:00 D -Rule Mont 1933 only - Oct 1 0:00 0 S -Rule Mont 1934 1939 - Sep lastSun 0:00 0 S -Rule Mont 1946 1973 - Apr lastSun 2:00 1:00 D -Rule Mont 1945 1948 - Sep lastSun 2:00 0 S -Rule Mont 1949 1950 - Oct lastSun 2:00 0 S -Rule Mont 1951 1956 - Sep lastSun 2:00 0 S -Rule Mont 1957 1973 - Oct lastSun 2:00 0 S +# From Garry McKinnon (2006-07-14) via Chris Walton: +# I chatted with a member of my board who has an outstanding memory +# and a long history in Atikokan (and in the telecom industry) and he +# can say for certain that Atikokan has been practicing the current +# time keeping since 1952, at least. +# From Paul Eggert (2006-07-17): +# Shanks & Pottenger say that Atikokan has agreed with Rainy River +# ever since standard time was introduced, but the information from +# McKinnon sounds more authoritative. For now, assume that Atikokan +# switched to EST immediately after WWII era daylight saving time +# ended. This matches the old (less-populous) America/Coral_Harbour +# entry since our cutoff date of 1970, so we can move +# America/Coral_Harbour to the 'backward' file. + +# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Toronto 1919 only - Mar 30 23:30 1:00 D Rule Toronto 1919 only - Oct 26 0:00 0 S Rule Toronto 1920 only - May 2 2:00 1:00 D @@ -1176,7 +1278,8 @@ Rule Toronto 1920 only - Sep 26 0:00 0 S Rule Toronto 1921 only - May 15 2:00 1:00 D Rule Toronto 1921 only - Sep 15 2:00 0 S Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D -# Shanks says 1923-09-19; assume it's a typo and that "-16" was meant. +# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" +# was meant. Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D # The 1927-to-1939 rules can be expressed more simply as @@ -1200,9 +1303,10 @@ Rule Toronto 1949 only - Nov lastSun 0:00 0 S Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D Rule Toronto 1950 only - Nov lastSun 2:00 0 S Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S -# Shanks says Toronto ended DST a week early in 1971, namely on 1971-10-24, -# but Mark Brader wrote (2003-05-31) that he checked the 1971-10-30 issue -# of the Toronto Star, and it said that DST ended 1971-10-31 as usual. +# Shanks & Pottenger say Toronto ended DST a week early in 1971, +# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this +# is wrong, and that he had confirmed it by checking the 1971-10-30 +# Toronto Star, which said that DST was ending 1971-10-31 as usual. Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S # From Paul Eggert (2003-07-27): @@ -1224,13 +1328,6 @@ Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S # months for the remainder of the war years. # Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Montreal -4:54:16 - LMT 1884 - -5:00 Mont E%sT 1918 - -5:00 Canada E%sT 1919 - -5:00 Mont E%sT 1942 Feb 9 2:00s - -5:00 Canada E%sT 1946 - -5:00 Mont E%sT 1974 - -5:00 Canada E%sT Zone America/Toronto -5:17:32 - LMT 1895 -5:00 Canada E%sT 1919 -5:00 Toronto E%sT 1942 Feb 9 2:00s @@ -1248,14 +1345,38 @@ Zone America/Nipigon -5:53:04 - LMT 1895 -5:00 Canada E%sT 1940 Sep 29 -5:00 1:00 EDT 1942 Feb 9 2:00s -5:00 Canada E%sT -Zone America/Rainy_River -6:17:56 - LMT 1895 +Zone America/Rainy_River -6:18:16 - LMT 1895 -6:00 Canada C%sT 1940 Sep 29 -6:00 1:00 CDT 1942 Feb 9 2:00s -6:00 Canada C%sT +Zone America/Atikokan -6:06:28 - LMT 1895 + -6:00 Canada C%sT 1940 Sep 29 + -6:00 1:00 CDT 1942 Feb 9 2:00s + -6:00 Canada C%sT 1945 Sep 30 2:00 + -5:00 - EST # Manitoba +# From Rob Douglas (2006-04-06): +# the old Manitoba Time Act - as amended by Bill 2, assented to +# March 27, 1987 ... said ... +# "between two o'clock Central Standard Time in the morning of +# the first Sunday of April of each year and two o'clock Central +# Standard Time in the morning of the last Sunday of October next +# following, one hour in advance of Central Standard Time."... +# I believe that the English legislation [of the old time act] had = +# been assented to (March 22, 1967).... +# Also, as far as I can tell, there was no order-in-council varying +# the time of Daylight Saving Time for 2005 and so the provisions of +# the 1987 version would apply - the changeover was at 2:00 Central +# Standard Time (i.e. not until 3:00 Central Daylight Time). + +# From Paul Eggert (2006-04-10): +# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) +# starting 1966. Since 02:00s is clearly correct for 1967 on, assume +# it was also 02:00s in 1966. + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Winn 1916 only - Apr 23 0:00 1:00 D Rule Winn 1916 only - Sep 17 0:00 0 S @@ -1278,18 +1399,13 @@ Rule Winn 1959 only - Oct lastSun 2:00 0 S Rule Winn 1960 only - Sep lastSun 2:00 0 S Rule Winn 1963 only - Apr lastSun 2:00 1:00 D Rule Winn 1963 only - Sep 22 2:00 0 S -Rule Winn 1966 1986 - Apr lastSun 2:00 1:00 D -Rule Winn 1966 1986 - Oct lastSun 2:00 0 S -Rule Winn 1987 2006 - Apr Sun>=1 2:00s 1:00 D -# From Paul Eggert (2000-10-02): -# INMS (2000-09-12) says that, since 1988 at least, Manitoba switches from -# DST at 03:00 local time. For now, assume it started in 1987. -Rule Winn 1987 2006 - Oct lastSun 2:00s 0 S -Rule Winn 2007 max - Mar Sun>=8 2:00s 1:00 D -Rule Winn 2007 max - Nov Sun>=1 2:00s 0 S +Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D +Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S +Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 - -6:00 Winn C%sT + -6:00 Winn C%sT 2006 + -6:00 Canada C%sT # Saskatchewan @@ -1308,8 +1424,8 @@ Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 # Willett (1914-03) notes that DST "has been in operation ... in the # City of Moose Jaw, Saskatchewan, for one year." -# From Paul Eggert (2000-10-02): -# Shanks writes that since 1970 most of this region has been like Regina. +# From Paul Eggert (2006-03-22): +# Shanks & Pottenger say that since 1970 this region has mostly been as Regina. # Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. # Other western towns (e.g. Lloydminster) are like Edmonton. # Matthews and Vincent (1998) write that Denare Beach and Creighton @@ -1341,6 +1457,11 @@ Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 # rules any more; all other districts appear to have used CST year round # since sometime in the 1960s. +# From Chris Walton (2006-06-26): +# The Saskatchewan time act which was last updated in 1996 is about 30 pages +# long and rather painful to read. +# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Regina 1918 only - Apr 14 2:00 1:00 D Rule Regina 1918 only - Oct 31 2:00 0 S @@ -1395,17 +1516,18 @@ Rule Edm 1967 only - Oct lastSun 2:00 0 S Rule Edm 1969 only - Apr lastSun 2:00 1:00 D Rule Edm 1969 only - Oct lastSun 2:00 0 S Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D -Rule Edm 1972 max - Oct lastSun 2:00 0 S -Rule Edm 1987 max - Apr Sun>=1 2:00 1:00 D +Rule Edm 1972 2006 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Edmonton -7:33:52 - LMT 1906 Sep - -7:00 Edm M%sT + -7:00 Edm M%sT 1987 + -7:00 Canada M%sT # British Columbia -# From Paul Eggert (2000-10-02): -# Shanks writes that since 1970 most of this region has been like Vancouver. +# From Paul Eggert (2006-03-22): +# Shanks & Pottenger write that since 1970 most of this region has +# been like Vancouver. # Dawson Creek uses MST. Much of east BC is like Edmonton. # Matthews and Vincent (1998) write that Creston is like Dawson Creek. @@ -1418,11 +1540,11 @@ Rule Vanc 1945 only - Sep 30 2:00 0 S Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D Rule Vanc 1946 only - Oct 13 2:00 0 S Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S -Rule Vanc 1962 max - Oct lastSun 2:00 0 S -Rule Vanc 1987 max - Apr Sun>=1 2:00 1:00 D +Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Vancouver -8:12:28 - LMT 1884 - -8:00 Vanc P%sT + -8:00 Vanc P%sT 1987 + -8:00 Canada P%sT Zone America/Dawson_Creek -8:00:56 - LMT 1884 -8:00 Canada P%sT 1947 -8:00 Vanc P%sT 1972 Aug 30 2:00 @@ -1431,7 +1553,7 @@ Zone America/Dawson_Creek -8:00:56 - LMT 1884 # Northwest Territories, Nunavut, Yukon -# From Paul Eggert (1999-10-29): +# From Paul Eggert (2006-03-22): # Dawson switched to PST in 1973. Inuvik switched to MST in 1979. # Mathew Englander (1996-10-07) gives the following refs: # * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, @@ -1440,7 +1562,12 @@ Zone America/Dawson_Creek -8:00:56 - LMT 1884 # * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. # * O.I.C. 1980/02 established DST. # * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. -# Shanks says Yukon's 1973-10-28 switch was at 2:00; go with Englander. +# Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go +# with Englander. +# From Chris Walton (2006-06-26): +# Here is a link to the old daylight saving portion of the interpretation +# act which was last updated in 1987: +# http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf # From Rives McDow (1999-09-04): # Nunavut ... moved ... to incorporate the whole territory into one time zone. @@ -1549,6 +1676,10 @@ Zone America/Dawson_Creek -8:00:56 - LMT 1884 # For lack of better information, assume that Southampton Island observed # daylight saving only during wartime. +# From Chris Walton (2006-07-19): +# The government of Yukon Territory ... recently announced it will extend +# daylight saving in 2007.... http://www.gov.yk.ca/news/2006/06-164.html + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule NT_YK 1918 only - Apr 14 2:00 1:00 D Rule NT_YK 1918 only - Oct 27 2:00 0 S @@ -1560,8 +1691,8 @@ Rule NT_YK 1945 only - Sep 30 2:00 0 S Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD Rule NT_YK 1965 only - Oct lastSun 2:00 0 S Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D -Rule NT_YK 1980 max - Oct lastSun 2:00 0 S -Rule NT_YK 1987 max - Apr Sun>=1 2:00 1:00 D +Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S +Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Pangnirtung -4:22:56 - LMT 1884 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 @@ -1572,10 +1703,11 @@ Zone America/Iqaluit -4:33:52 - LMT 1884 # Frobisher Bay before 1987 -5:00 NT_YK E%sT 1999 Oct 31 2:00 -6:00 Canada C%sT 2000 Oct 29 2:00 -5:00 Canada E%sT -Zone America/Coral_Harbour -5:32:40 - LMT 1884 - -5:00 NT_YK E%sT 1946 - -5:00 - EST -Zone America/Rankin_Inlet -6:08:40 - LMT 1884 +# Now subsumed by America/Atikokan. +#Zone America/Coral_Harbour -5:32:40 - LMT 1884 +# -5:00 NT_YK E%sT 1946 +# -5:00 - EST +Zone America/Rankin_Inlet -6:08:20 - LMT 1884 -6:00 NT_YK C%sT 2000 Oct 29 2:00 -5:00 - EST 2001 Apr 1 3:00 -6:00 Canada C%sT @@ -1586,16 +1718,20 @@ Zone America/Cambridge_Bay -7:00:20 - LMT 1884 -6:00 - CST 2001 Apr 1 3:00 -7:00 Canada M%sT Zone America/Yellowknife -7:37:24 - LMT 1884 - -7:00 NT_YK M%sT -Zone America/Inuvik -8:54:00 - LMT 1884 + -7:00 NT_YK M%sT 1980 + -7:00 Canada M%sT +Zone America/Inuvik -8:54:52 - LMT 1884 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 - -7:00 NT_YK M%sT + -7:00 NT_YK M%sT 1980 + -7:00 Canada M%sT Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 -9:00 NT_YK Y%sT 1966 Jul 1 2:00 - -8:00 NT_YK P%sT + -8:00 NT_YK P%sT 1980 + -8:00 Canada P%sT Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 -9:00 NT_YK Y%sT 1973 Oct 28 0:00 - -8:00 NT_YK P%sT + -8:00 NT_YK P%sT 1980 + -8:00 Canada P%sT ############################################################################### @@ -1609,16 +1745,12 @@ Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 # history of Mexican local time (in Spanish) # </a>. # -# Here are the discrepancies between Shanks and the MLoC. +# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. # (In all cases we go with the MLoC.) -# Shanks reports that Baja was at -8:00 in 1922/1923. -# Shanks says the 1930 transition in Baja was 1930-11-16. -# Shanks reports no DST during summer 1931. -# Shanks reports a transition at 1932-03-30 23:00, not 1932-04-01. -# Shanks does not report transitions for Baja in 1945 or 1948. -# Shanks reports southern Mexico transitions on 1981-12-01, not 12-23. -# Shanks says Quintana Roo switched to -6:00 on 1982-12-02, and to -5:00 -# on 1997-10-26 at 02:00. +# S&P report that Baja was at -8:00 in 1922/1923. +# S&P say the 1930 transition in Baja was 1930-11-16. +# S&P report no DST during summer 1931. +# S&P report a transition at 1932-03-30 23:00, not 1932-04-01. # From Gwillim Law (2001-02-20): # There are some other discrepancies between the Decrees page and the @@ -1626,10 +1758,6 @@ Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 # the researchers who prepared the Decrees page failed to find some of # the relevant documents. -# From Paul Eggert (2000-07-26): -# Shanks gives 1942-04-01 instead of 1942-04-24, and omits the 1981 -# and 1988 DST experiments. Go with spin.com.mx. - # From Alan Perry (1996-02-15): # A guy from our Mexico subsidiary finally found the Presidential Decree # outlining the timezone changes in Mexico. @@ -1829,7 +1957,8 @@ Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 -8:00 - PST 1931 Apr 1 -8:00 1:00 PDT 1931 Sep 30 -8:00 - PST 1942 Apr 24 - -8:00 1:00 PWT 1945 Nov 12 + -8:00 1:00 PWT 1945 Aug 14 23:00u + -8:00 1:00 PPT 1945 Nov 12 # Peace -8:00 - PST 1948 Apr 5 -8:00 1:00 PDT 1949 Jan 14 -8:00 - PST 1954 @@ -1839,12 +1968,13 @@ Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 -8:00 Mexico P%sT 2001 -8:00 US P%sT 2002 Feb 20 -8:00 Mexico P%sT -# From Paul Eggert (2001-03-05): +# From Paul Eggert (2006-03-22): # Formerly there was an America/Ensenada zone, which differed from # America/Tijuana only in that it did not observe DST from 1976 -# through 1995. This was as per Shanks. However, Guy Harris reports +# through 1995. This was as per Shanks (1999). But Shanks & Pottenger say +# Ensenada did not observe DST from 1948 through 1975. Guy Harris reports # that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and -# Tijuana observe DST," which contradicts Shanks but does imply that +# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that # DST-observance was a town-by-town matter back then. This concerns # data after 1970 so most likely there should be at least one Zone # other than America/Tijuana for Baja, but it's not clear yet what its @@ -1888,7 +2018,7 @@ Zone America/Barbados -3:58:28 - LMT 1924 # Bridgetown -4:00 Barb A%sT # Belize -# Whitman entirely disagrees with Shanks; go with Shanks. +# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S @@ -1901,10 +2031,20 @@ Zone America/Belize -5:52:48 - LMT 1912 Apr -6:00 Belize C%sT # Bermuda + +# From Dan Jones, reporting in The Royal Gazette (2006-06-26): + +# Next year, however, clocks in the US will go forward on the second Sunday +# in March, until the first Sunday in November. And, after the Time Zone +# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on +# Friday, the same thing will happen in Bermuda. +# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 + # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Atlantic/Bermuda -4:19:04 - LMT 1930 Jan 1 2:00 # Hamilton -4:00 - AST 1974 Apr 28 2:00 - -4:00 Bahamas A%sT + -4:00 Bahamas A%sT 1976 + -4:00 US A%sT # Cayman Is # Zone NAME GMTOFF RULES FORMAT [UNTIL] @@ -1917,7 +2057,8 @@ Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D -# IATA SSIM (1991-09) says the following was at 1:00; go with Shanks. +# IATA SSIM (1991-09) says the following was at 1:00; +# go with Shanks & Pottenger. Rule CR 1991 only - Jul 1 0:00 0 S Rule CR 1992 only - Mar 15 0:00 0 S # There are too many San Joses elsewhere, so we'll use `Costa Rica'. @@ -1943,18 +2084,26 @@ Zone America/Costa_Rica -5:36:20 - LMT 1890 # San Jose # From Evert van der Veer via Steffen Thorsen (2004-10-28): # Cuba is not going back to standard time this year. -# From Paul Eggert (2004-10-28): +# From Paul Eggert (2006-03-22): # http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html # says that it's due to a problem at the Antonio Guiteras # thermoelectric plant, and says "This October there will be no return # to normal hours (after daylight saving time)". -# For now, let's assume that it's a one-year temporary measure. +# For now, let's assume that it's a temporary measure. # From Carlos A. Carnero Delgado (2005-11-12): # This year (just like in 2004-2005) there's no change in time zone # adjustment in Cuba. We will stay in daylight saving time: # http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html +# From Jesper Norgaard Welen (2006-10-21): +# An article in GRANMA INTERNACIONAL claims that Cuba will end +# the 3 years of permanent DST next weekend, see +# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html +# "On Saturday night, October 28 going into Sunday, October 29, at 01:00, +# watches should be set back one hour -- going back to 00:00 hours -- returning +# to the normal schedule.... + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Cuba 1928 only - Jun 10 0:00 1:00 D Rule Cuba 1928 only - Oct 10 0:00 0 S @@ -2033,6 +2182,7 @@ Zone America/Santo_Domingo -4:39:36 - LMT 1890 -4:00 - AST # El Salvador + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D Rule Salv 1987 1988 - Sep lastSun 0:00 0 S @@ -2053,6 +2203,19 @@ Zone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre -4:00 - AST # Guatemala +# +# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: +# Diario Co Latino, at +# http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079, +# says in an article dated 2006-04-19 that the Guatemalan government had +# decided on that date to advance official time by 60 minutes, to lessen the +# impact of the elevated cost of oil.... Daylight saving time will last from +# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). +# From Paul Eggert (2006-06-22): +# The Ministry of Energy and Mines, press release CP-15/2006 +# (2006-04-19), says DST ends at 24:00. See +# <http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf>. + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Guat 1973 only - Nov 25 0:00 1:00 D Rule Guat 1974 only - Feb 24 0:00 0 S @@ -2060,6 +2223,8 @@ Rule Guat 1983 only - May 21 0:00 1:00 D Rule Guat 1983 only - Sep 22 0:00 0 S Rule Guat 1991 only - Mar 23 0:00 1:00 D Rule Guat 1991 only - Sep 7 0:00 0 S +Rule Guat 2006 only - Apr 30 0:00 1:00 D +Rule Guat 2006 only - Oct 1 0:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5 -6:00 Guat C%sT @@ -2084,26 +2249,67 @@ Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5 # October 2005. # # "Port-au-Prince, March 31, 2005" +# +# From Steffen Thorsen (2006-04-04): +# I have been informed by users that Haiti observes DST this year like +# last year, so the current "only" rule for 2005 might be changed to a +# "max" rule or to last until 2006. (Who knows if they will observe DST +# next year or if they will extend their DST like US/Canada next year). +# +# I have found this article about it (in French): +# http://www.haitipressnetwork.com/news.cfm?articleID=7612 +# +# The reason seems to be an energy crisis. + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Haiti 1983 only - May 8 0:00 1:00 D Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S -# Shanks says AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. Go with IATA. +# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. +# Go with IATA. Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S -Rule Haiti 2005 only - Apr Sun>=1 0:00 1:00 D -Rule Haiti 2005 only - Oct lastSun 0:00 0 S +Rule Haiti 2005 max - Apr Sun>=1 0:00 1:00 D +Rule Haiti 2005 max - 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 -5:00 Haiti E%sT # Honduras -# Shanks says 1921 Jan 1; go with Whitman's more precise Apr 1. +# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. + +# From Paul Eggert (2006-05-05): +# worldtimezone.com reports a 2006-05-02 Spanish-language AP article +# saying Honduras will start using DST midnight Saturday, effective 4 +# months until September. La Tribuna reported today +# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president +# of Honduras, refused to back down on this. + +# From Jesper Norgaard Welen (2006-08-08): +# It seems that Honduras has returned from DST to standard time this Monday at +# 00:00 hours (prolonging Sunday to 25 hours duration). +# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html + +# From Paul Eggert (2006-08-08): +# Also see Diario El Heraldo, The country returns to standard time (2006-08-08) +# <http://www.elheraldo.hn/nota.php?nid=54941&sec=12>. +# It mentions executive decree 18-2006. + +# From Steffen Thorsen (2006-08-17): +# Honduras will observe DST from 2007 to 2009, exact dates are not +# published, I have located this authoritative source: +# http://www.presidencia.gob.hn/noticia.aspx?nId=47 + +# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S +Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D +Rule Hond 1987 1988 - Sep lastSun 0:00 0 S +Rule Hond 2006 2009 - May Sun>=1 0:00 1:00 D +Rule Hond 2006 2009 - Aug Mon>=1 0:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr - -6:00 Salv C%sT + -6:00 Hond C%sT # # Great Swan I ceded by US to Honduras in 1972 @@ -2115,7 +2321,7 @@ Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr # From U. S. Naval Observatory (1989-01-19): # JAMAICA 5 H BEHIND UTC -# From Shanks: +# From Shanks & Pottenger: # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Jamaica -5:07:12 - LMT 1890 # Kingston -5:07:12 - KMT 1912 Feb # Kingston Mean Time @@ -2132,18 +2338,16 @@ Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France -4:00 - AST # Montserrat -# From Paul Eggert (1997-08-31): -# Recent volcanic eruptions have forced evacuation of Plymouth, the capital. -# Luckily, Olveston, the current de facto capital, has the same longitude. +# From Paul Eggert (2006-03-22): +# In 1995 volcanic eruptions forced evacuation of Plymouth, the capital. +# world.gazetteer.com says Cork Hill is the most populous location now. # Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Olveston +Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Cork Hill -4:00 - AST # Nicaragua # -# From Steffen Thorsen (1998-12-29): -# Nicaragua seems to be back at -6:00 but I have not been able to find when -# they changed from -5:00. +# This uses Shanks & Pottenger for times before 2005. # # From Steffen Thorsen (2005-04-12): # I've got reports from 8 different people that Nicaragua just started @@ -2157,8 +2361,7 @@ Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Olveston # # From Paul Eggert (2005-05-01): # The decree doesn't say anything about daylight saving, but for now let's -# assume that it is daylight saving and that they'll switch back on the -# 3rd Sunday in September. +# assume that it is daylight saving.... # # From Gwillim Law (2005-04-21): # The Associated Press story on the time change, which can be found at @@ -2176,20 +2379,35 @@ Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Olveston # http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm # (2005-09-26) # +# From Jesper Norgaard Welen (2006-05-05): +# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 +# (my informal translation) +# By order of the president of the republic, Enrique Bolanos, Nicaragua +# advanced by sixty minutes their official time, yesterday at 2 in the +# morning, and will stay that way until 30.th. of september. +# +# From Jesper Norgaard Welen (2006-09-30): +# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf +# My informal translation runs: +# The natural sun time is restored in all the national territory, in that the +# time is returned one hour at 01:00 am of October 1 of 2006. +# # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S -Rule Nic 1992 only - Jan 1 4:00 1:00 D -Rule Nic 1992 only - Sep 24 0:00 0 S Rule Nic 2005 only - Apr 10 0:00 1:00 D -Rule Nic 2005 only - Oct 2 0:00 0 S +Rule Nic 2005 only - Oct Sun>=1 0:00 0 S +Rule Nic 2006 only - Apr 30 2:00 1:00 D +Rule Nic 2006 only - Oct Sun>=1 1:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Managua -5:45:08 - LMT 1890 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? -6:00 - CST 1973 May -5:00 - EST 1975 Feb 16 - -6:00 Nic C%sT 1993 Jan 1 4:00 - -5:00 - EST 1998 Dec + -6:00 Nic C%sT 1992 Jan 1 4:00 + -5:00 - EST 1992 Sep 24 + -6:00 - CST 1993 + -5:00 - EST 1997 -6:00 Nic C%sT # Panama @@ -2203,7 +2421,7 @@ Zone America/Panama -5:18:08 - LMT 1890 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan -4:00 - AST 1942 May 3 - -4:00 1:00 AWT 1945 Sep 30 2:00 + -4:00 US A%sT 1946 -4:00 - AST # St Kitts-Nevis @@ -2232,8 +2450,8 @@ Zone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown -4:00 - AST # Turks and Caicos -# From Paul Eggert (1998-08-06): -# Shanks says they use US DST rules, but IATA SSIM (1991/1998) +# From Paul Eggert (2006-03-22): +# Shanks & Pottenger say they use US DST rules, but IATA SSIM (1991/1998) # says they switch at midnight. Go with IATA SSIM. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule TC 1979 1986 - Apr lastSun 0:00 1:00 D |