107 # importance."
108 #
109 # On Aug. 14, stalling while talking steadily into the NBC networks' open
110 # microphone, St. John heard five bells and waited only to hear a sixth bell,
111 # before announcing confidently: "Ladies and gentlemen, World War II is over.
112 # The Japanese have agreed to our surrender terms."
113 #
114 # He had scored a 20-second scoop on other broadcasters.
115
116 # From Arthur David Olson (2005-08-22):
117 # Paul has been careful to use the "US" rules only in those locations
118 # that are part of the United States; this reflects the real scope of
119 # U.S. government action. So even though the "US" rules have changed
120 # in the latest release, other countries won't be affected.
121
122 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
123 Rule US 1918 1919 - Mar lastSun 2:00 1:00 D
124 Rule US 1918 1919 - Oct lastSun 2:00 0 S
125 Rule US 1942 only - Feb 9 2:00 1:00 W # War
126 Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace
127 Rule US 1945 only - Sep 30 2:00 0 S
128 Rule US 1967 2006 - Oct lastSun 2:00 0 S
129 Rule US 1967 1973 - Apr lastSun 2:00 1:00 D
130 Rule US 1974 only - Jan 6 2:00 1:00 D
131 Rule US 1975 only - Feb 23 2:00 1:00 D
132 Rule US 1976 1986 - Apr lastSun 2:00 1:00 D
133 Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D
134 Rule US 2007 max - Mar Sun>=8 2:00 1:00 D
135 Rule US 2007 max - Nov Sun>=1 2:00 0 S
136
137 # From Arthur David Olson, 2005-12-19
138 # We generate the files specified below to guard against old files with
139 # obsolete information being left in the time zone binary directory.
140 # We limit the list to names that have appeared in previous versions of
141 # this time zone package.
142 # We do these as separate Zones rather than as Links to avoid problems if
143 # a particular place changes whether it observes DST.
144 # We put these specifications here in the northamerica file both to
145 # increase the chances that they'll actually get compiled and to
146 # avoid the need to duplicate the US rules in another file.
147
260 # Pennsylvania, Rhode Island, South Carolina, eastern Tennessee,
261 # Vermont, Virginia, West Virginia
262
263 # From Dave Cantor (2004-11-02):
264 # Early this summer I had the occasion to visit the Mount Washington
265 # Observatory weather station atop (of course!) Mount Washington [, NH]....
266 # One of the staff members said that the station was on Eastern Standard Time
267 # and didn't change their clocks for Daylight Saving ... so that their
268 # reports will always have times which are 5 hours behind UTC.
269
270 # From Paul Eggert (2005-08-26):
271 # According to today's Huntsville Times
272 # http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1
273 # a few towns on Alabama's "eastern border with Georgia, such as Phenix City
274 # in Russell County, Lanett in Chambers County and some towns in Lee County,
275 # set their watches and clocks on Eastern time." It quotes H.H. "Bubba"
276 # Roberts, city administrator in Phenix City. as saying "We are in the Central
277 # time zone, but we do go by the Eastern time zone because so many people work
278 # in Columbus."
279
280 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
281 Rule NYC 1920 only - Mar lastSun 2:00 1:00 D
282 Rule NYC 1920 only - Oct lastSun 2:00 0 S
283 Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D
284 Rule NYC 1921 1954 - Sep lastSun 2:00 0 S
285 Rule NYC 1955 1966 - Oct lastSun 2:00 0 S
286 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
287 Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58
288 -5:00 US E%sT 1920
289 -5:00 NYC E%sT 1942
290 -5:00 US E%sT 1946
291 -5:00 NYC E%sT 1967
292 -5:00 US E%sT
293
294 # US central time, represented by Chicago
295
296 # Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia,
297 # Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and
298 # Washington counties), Illinois, western Indiana
299 # (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
968 Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00
969 -6:00 US C%sT 1946
970 -6:00 Menominee C%sT 1969 Apr 27 2:00
971 -5:00 - EST 1973 Apr 29 2:00
972 -6:00 US C%sT
973
974 # Navassa
975 # administered by the US Fish and Wildlife Service
976 # claimed by US under the provisions of the 1856 Guano Islands Act
977 # also claimed by Haiti
978 # occupied 1857/1900 by the Navassa Phosphate Co
979 # US lighthouse 1917/1996-09
980 # currently uninhabited
981 # see Mark Fineman, "An Isle Rich in Guano and Discord",
982 # _Los Angeles Times_ (1998-11-10), A1, A10; it cites
983 # Jimmy Skaggs, _The Great Guano Rush_ (1994).
984
985 ################################################################################
986
987
988 # From Paul Eggert (2006-03-22):
989 # A good source for time zone historical data outside the U.S. is
990 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
991 # San Diego: ACS Publications, Inc. (2003).
992 #
993 # Gwillim Law writes that a good source
994 # for recent time zone data is the International Air Transport
995 # Association's Standard Schedules Information Manual (IATA SSIM),
996 # published semiannually. Law sent in several helpful summaries
997 # of the IATA's data after 1990.
998 #
999 # Except where otherwise noted, Shanks & Pottenger is the source for
1000 # entries through 1990, and IATA SSIM is the source for entries afterwards.
1001 #
1002 # Other sources occasionally used include:
1003 #
1004 # Edward W. Whitman, World Time Differences,
1005 # Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated),
1006 # which I found in the UCLA library.
1007 #
1008 # William Willett, The Waste of Daylight, 19th edition
1009 # <http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf>
1010 # [PDF] (1914-03)
1011 #
1012 # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94
1013 # <http://www.jstor.org/stable/1774359>.
1014 #
1015 # See the 'europe' file for Greenland.
1016
1017 # Canada
1018
1019 # From Alain LaBonté (1994-11-14):
1020 # I post here the time zone abbreviations standardized in Canada
1021 # for both English and French in the CAN/CSA-Z234.4-89 standard....
1078 # P.E.I. will follow US rules....
1079 # http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf
1080 # ...
1081 # Province of Newfoundland and Labrador....
1082 # http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm
1083 # ...
1084 # Yukon
1085 # http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf
1086 # ...
1087 # N.W.T. will follow US rules. Whoever maintains the government web site
1088 # does not seem to believe in bookmarks. To see the news release, click the
1089 # following link and search for "Daylight Savings Time Change". Press the
1090 # "Daylight Savings Time Change" link; it will fire off a popup using
1091 # JavaScript.
1092 # http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive
1093 # ...
1094 # Nunavut
1095 # An amendment to the Interpretation Act was registered on February 19/2007....
1096 # http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf
1097
1098 # From Paul Eggert (2006-04-25):
1099 # H. David Matthews and Mary Vincent's map
1100 # "It's about TIME", _Canadian Geographic_ (September-October 1998)
1101 # http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp
1102 # contains detailed boundaries for regions observing nonstandard
1103 # time and daylight saving time arrangements in Canada circa 1998.
1104 #
1105 # INMS, the Institute for National Measurement Standards in Ottawa, has
1106 # information about standard and daylight saving time zones in Canada.
1107 # http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php
1108 # (updated periodically).
1109 # Its unofficial information is often taken from Matthews and Vincent.
1110
1111 # From Paul Eggert (2006-06-27):
1112 # For now, assume all of DST-observing Canada will fall into line with the
1113 # new US DST rules,
1114
1115 # From Chris Walton (2011-12-01)
1116 # In the first of Tammy Hardwick's articles
1117 # http://www.ilovecreston.com/?p=articles&t=spec&ar=260
1118 # she quotes the Friday November 1/1918 edition of the Creston Review.
1119 # The quote includes these two statements:
1120 # 'Sunday the CPR went back to the old system of time...'
1121 # '... The daylight saving scheme was dropped all over Canada at the same time,'
1122 # These statements refer to a transition from daylight time to standard time
1123 # that occurred nationally on Sunday October 27/1918. This transition was
1124 # also documented in the Saturday October 26/1918 edition of the Toronto Star.
1125
1126 # In light of that evidence, we alter the date from the earlier believed
1127 # Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day
1128 # than Thursday) in all Canadian rulesets.
1953 # mountain time, which they had used before the advent of Nunavut's
1954 # unified time zone in 1999.
1955 #
1956 # From Rives McDow (2001-01-20), quoting the Nunavut government:
1957 # The preceding decision came into effect at midnight, Saturday Nov 4, 2000.
1958
1959 # From Paul Eggert (2000-12-04):
1960 # Let's just keep track of the official times for now.
1961
1962 # From Rives McDow (2001-03-07):
1963 # The premier of Nunavut has issued a ministerial statement advising
1964 # that effective 2001-04-01, the territory of Nunavut will revert
1965 # back to three time zones (mountain, central, and eastern). Of the
1966 # cities in Nunavut, Coral Harbor is the only one that I know of that
1967 # has said it will not observe dst, staying on EST year round. I'm
1968 # checking for more info, and will get back to you if I come up with
1969 # more.
1970 # [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).]
1971
1972 # From Gwillim Law (2005-05-21):
1973 # According to maps at
1974 # http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg
1975 # http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg
1976 # (both dated 2003), and
1977 # http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp
1978 # (from a 1998 Canadian Geographic article), the de facto and de jure time
1979 # for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year
1980 # round. Using Google, it's easy to find other websites that confirm this.
1981 # I wasn't able to find how far back this time regimen goes, but since it
1982 # predates the creation of Nunavut, it probably goes back many years....
1983 # The Inuktitut name of Coral Harbour is Sallit, but it's rarely used.
1984 #
1985 # From Paul Eggert (2005-07-26):
1986 # For lack of better information, assume that Southampton Island observed
1987 # daylight saving only during wartime.
1988
1989 # From Chris Walton (2007-03-01):
1990 # ... the community of Resolute (located on Cornwallis Island in
1991 # Nunavut) moved from Central Time to Eastern Time last November.
1992 # Basically the community did not change its clocks at the end of
1993 # daylight saving....
1994 # http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html
1995
1996 # From Chris Walton (2011-03-21):
1997 # Back in 2007 I initiated the creation of a new "zone file" for Resolute
1998 # Bay. Resolute Bay is a small community located about 900km north of
1999 # the Arctic Circle. The zone file was required because Resolute Bay had
2000 # decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007.
2001 #
2002 # According to new information which I received last week, Resolute Bay
2003 # went back to using UTC-6 in the winter of 2007-2008...
2004 #
2005 # On March 11/2007 most of Canada went onto daylight saving. On March
2006 # 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I
2007 # talked to somebody that was both knowledgeable and helpful. I was able
2103 -7:00 NT_YK M%sT 1980
2104 -7:00 Canada M%sT
2105 Zone America/Inuvik 0 - zzz 1953 # Inuvik founded
2106 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00
2107 -7:00 NT_YK M%sT 1980
2108 -7:00 Canada M%sT
2109 Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20
2110 -9:00 NT_YK Y%sT 1966 Jul 1 2:00
2111 -8:00 NT_YK P%sT 1980
2112 -8:00 Canada P%sT
2113 Zone America/Dawson -9:17:40 - LMT 1900 Aug 20
2114 -9:00 NT_YK Y%sT 1973 Oct 28 0:00
2115 -8:00 NT_YK P%sT 1980
2116 -8:00 Canada P%sT
2117
2118
2119 ###############################################################################
2120
2121 # Mexico
2122
2123 # From Paul Eggert (2001-03-05):
2124 # The Investigation and Analysis Service of the
2125 # Mexican Library of Congress (MLoC) has published a
2126 # history of Mexican local time (in Spanish)
2127 # http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/
2128 #
2129 # Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC.
2130 # (In all cases we go with the MLoC.)
2131 # S&P report that Baja was at -8:00 in 1922/1923.
2132 # S&P say the 1930 transition in Baja was 1930-11-16.
2133 # S&P report no DST during summer 1931.
2134 # S&P report a transition at 1932-03-30 23:00, not 1932-04-01.
2135
2136 # From Gwillim Law (2001-02-20):
2137 # There are some other discrepancies between the Decrees page and the
2138 # tz database. I think they can best be explained by supposing that
2139 # the researchers who prepared the Decrees page failed to find some of
2140 # the relevant documents.
2141
2142 # From Alan Perry (1996-02-15):
2143 # A guy from our Mexico subsidiary finally found the Presidential Decree
2144 # outlining the timezone changes in Mexico.
2145 #
2146 # ------------- Begin Forwarded Message -------------
2147 #
2276 # http://www.timeanddate.com/news/time/north-mexico-dst-change.html
2277
2278 # From Arthur David Olson (2010-01-20):
2279 # The page
2280 # http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010
2281 # includes this text:
2282 # En los municipios fronterizos de Tijuana y Mexicali en Baja California;
2283 # Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila;
2284 # Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en
2285 # Tamaulipas, la aplicación de este horario estacional surtirá efecto
2286 # desde las dos horas del segundo domingo de marzo y concluirá a las dos
2287 # horas del primer domingo de noviembre.
2288 # En los municipios fronterizos que se encuentren ubicados en la franja
2289 # fronteriza norte en el territorio comprendido entre la línea
2290 # internacional y la línea paralela ubicada a una distancia de veinte
2291 # kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el
2292 # interior del país, la aplicación de este horario estacional surtirá
2293 # efecto desde las dos horas del segundo domingo de marzo y concluirá a
2294 # las dos horas del primer domingo de noviembre.
2295
2296 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2297 Rule Mexico 1939 only - Feb 5 0:00 1:00 D
2298 Rule Mexico 1939 only - Jun 25 0:00 0 S
2299 Rule Mexico 1940 only - Dec 9 0:00 1:00 D
2300 Rule Mexico 1941 only - Apr 1 0:00 0 S
2301 Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War
2302 Rule Mexico 1944 only - May 1 0:00 0 S
2303 Rule Mexico 1950 only - Feb 12 0:00 1:00 D
2304 Rule Mexico 1950 only - Jul 30 0:00 0 S
2305 Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D
2306 Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S
2307 Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D
2308 Rule Mexico 2001 only - Sep lastSun 2:00 0 S
2309 Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D
2310 Rule Mexico 2002 max - Oct lastSun 2:00 0 S
2311 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2312 # Quintana Roo; represented by Cancún
2313 Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56
2314 -6:00 - CST 1981 Dec 23
2315 -5:00 Mexico E%sT 1998 Aug 2 2:00
2316 -6:00 Mexico C%sT
2317 # Campeche, Yucatán; represented by Mérida
2318 Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32
2319 -6:00 - CST 1981 Dec 23
2320 -5:00 - EST 1982 Dec 2
2321 -6:00 Mexico C%sT
2322 # Coahuila, Durango, Nuevo León, Tamaulipas (near US border)
2323 Zone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00
2324 -6:00 - CST 1988
2325 -6:00 US C%sT 1989
2326 -6:00 Mexico C%sT 2010
2327 -6:00 US C%sT
2328 # Coahuila, Durango, Nuevo León, Tamaulipas (away from US border)
2329 Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44
2330 -6:00 - CST 1988
2331 -6:00 US C%sT 1989
2332 -6:00 Mexico C%sT
2333 # Central Mexico
2334 Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24
2335 -7:00 - MST 1927 Jun 10 23:00
2336 -6:00 - CST 1930 Nov 15
2968
2969 # From Steffen Thorsen (2007-03-30):
2970 # http://www.laprensahn.com/pais_nota.php?id04962=7386
2971 # So it seems that Honduras will not enter DST this year....
2972
2973 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2974 Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D
2975 Rule Hond 1987 1988 - Sep lastSun 0:00 0 S
2976 Rule Hond 2006 only - May Sun>=1 0:00 1:00 D
2977 Rule Hond 2006 only - Aug Mon>=1 0:00 0 S
2978 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2979 Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr
2980 -6:00 Hond C%sT
2981 #
2982 # Great Swan I ceded by US to Honduras in 1972
2983
2984 # Jamaica
2985 # Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an
2986 # unspecified official document, and says "This time is used throughout the
2987 # island". Go with Milne. Round to the nearest second as required by zic.
2988 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2989 Zone America/Jamaica -5:07:11 - LMT 1890 # Kingston
2990 -5:07:11 - KMT 1912 Feb # Kingston Mean Time
2991 -5:00 - EST 1974 Apr 28 2:00
2992 -5:00 US E%sT 1984
2993 -5:00 - EST
2994
2995 # Martinique
2996 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2997 Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France
2998 -4:04:20 - FFMT 1911 May # Fort-de-France MT
2999 -4:00 - AST 1980 Apr 6
3000 -4:00 1:00 ADT 1980 Sep 28
3001 -4:00 - AST
3002
3003 # Montserrat
3004 # See America/Port_of_Spain.
3005
3006 # Nicaragua
3007 #
3008 # This uses Shanks & Pottenger for times before 2005.
3009 #
3010 # From Steffen Thorsen (2005-04-12):
3011 # I've got reports from 8 different people that Nicaragua just started
3099
3100 # Turks and Caicos
3101 #
3102 # From Chris Dunn in
3103 # http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007
3104 # (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the
3105 # daylight saving dates for time changes have been adjusted to match
3106 # the recent U.S. change of dates.
3107 #
3108 # From Brian Inglis (2007-04-28):
3109 # http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26]
3110 # there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three
3111 # rows before that there is an out of date entry for Oct:
3112 # "Eastern Standard Times Begins 2007
3113 # Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time"
3114 # indicating that the normal ET rules are followed.
3115 #
3116 # From Paul Eggert (2014-08-19):
3117 # The 2014-08-13 Cabinet meeting decided to stay on UTC-4 year-round. See:
3118 # http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm
3119 # Model this as a switch from EST/EDT to AST on 2014-11-02 at 02:00.
3120 #
3121 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3122 Zone America/Grand_Turk -4:44:32 - LMT 1890
3123 -5:07:11 - KMT 1912 Feb # Kingston Mean Time
3124 -5:00 - EST 1979
3125 -5:00 US E%sT 2014 Nov 2 2:00
3126 -4:00 - AST
3127
3128 # British Virgin Is
3129 # Virgin Is
3130 # See America/Port_of_Spain.
3131
3132
3133 # Local Variables:
3134 # coding: utf-8
3135 # End:
|
107 # importance."
108 #
109 # On Aug. 14, stalling while talking steadily into the NBC networks' open
110 # microphone, St. John heard five bells and waited only to hear a sixth bell,
111 # before announcing confidently: "Ladies and gentlemen, World War II is over.
112 # The Japanese have agreed to our surrender terms."
113 #
114 # He had scored a 20-second scoop on other broadcasters.
115
116 # From Arthur David Olson (2005-08-22):
117 # Paul has been careful to use the "US" rules only in those locations
118 # that are part of the United States; this reflects the real scope of
119 # U.S. government action. So even though the "US" rules have changed
120 # in the latest release, other countries won't be affected.
121
122 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
123 Rule US 1918 1919 - Mar lastSun 2:00 1:00 D
124 Rule US 1918 1919 - Oct lastSun 2:00 0 S
125 Rule US 1942 only - Feb 9 2:00 1:00 W # War
126 Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace
127 Rule US 1945 only - Sep lastSun 2:00 0 S
128 Rule US 1967 2006 - Oct lastSun 2:00 0 S
129 Rule US 1967 1973 - Apr lastSun 2:00 1:00 D
130 Rule US 1974 only - Jan 6 2:00 1:00 D
131 Rule US 1975 only - Feb 23 2:00 1:00 D
132 Rule US 1976 1986 - Apr lastSun 2:00 1:00 D
133 Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D
134 Rule US 2007 max - Mar Sun>=8 2:00 1:00 D
135 Rule US 2007 max - Nov Sun>=1 2:00 0 S
136
137 # From Arthur David Olson, 2005-12-19
138 # We generate the files specified below to guard against old files with
139 # obsolete information being left in the time zone binary directory.
140 # We limit the list to names that have appeared in previous versions of
141 # this time zone package.
142 # We do these as separate Zones rather than as Links to avoid problems if
143 # a particular place changes whether it observes DST.
144 # We put these specifications here in the northamerica file both to
145 # increase the chances that they'll actually get compiled and to
146 # avoid the need to duplicate the US rules in another file.
147
260 # Pennsylvania, Rhode Island, South Carolina, eastern Tennessee,
261 # Vermont, Virginia, West Virginia
262
263 # From Dave Cantor (2004-11-02):
264 # Early this summer I had the occasion to visit the Mount Washington
265 # Observatory weather station atop (of course!) Mount Washington [, NH]....
266 # One of the staff members said that the station was on Eastern Standard Time
267 # and didn't change their clocks for Daylight Saving ... so that their
268 # reports will always have times which are 5 hours behind UTC.
269
270 # From Paul Eggert (2005-08-26):
271 # According to today's Huntsville Times
272 # http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1
273 # a few towns on Alabama's "eastern border with Georgia, such as Phenix City
274 # in Russell County, Lanett in Chambers County and some towns in Lee County,
275 # set their watches and clocks on Eastern time." It quotes H.H. "Bubba"
276 # Roberts, city administrator in Phenix City. as saying "We are in the Central
277 # time zone, but we do go by the Eastern time zone because so many people work
278 # in Columbus."
279
280 # From Paul Eggert (2014-09-06):
281 # Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208
282 # says that New York City Hall time was 3 minutes 58.4 seconds fast of
283 # Eastern time (i.e., -4:56:01.6) just before the 1883 switch. Round to the
284 # nearest second.
285
286 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
287 Rule NYC 1920 only - Mar lastSun 2:00 1:00 D
288 Rule NYC 1920 only - Oct lastSun 2:00 0 S
289 Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D
290 Rule NYC 1921 1954 - Sep lastSun 2:00 0 S
291 Rule NYC 1955 1966 - Oct lastSun 2:00 0 S
292 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
293 Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58
294 -5:00 US E%sT 1920
295 -5:00 NYC E%sT 1942
296 -5:00 US E%sT 1946
297 -5:00 NYC E%sT 1967
298 -5:00 US E%sT
299
300 # US central time, represented by Chicago
301
302 # Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia,
303 # Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and
304 # Washington counties), Illinois, western Indiana
305 # (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
974 Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00
975 -6:00 US C%sT 1946
976 -6:00 Menominee C%sT 1969 Apr 27 2:00
977 -5:00 - EST 1973 Apr 29 2:00
978 -6:00 US C%sT
979
980 # Navassa
981 # administered by the US Fish and Wildlife Service
982 # claimed by US under the provisions of the 1856 Guano Islands Act
983 # also claimed by Haiti
984 # occupied 1857/1900 by the Navassa Phosphate Co
985 # US lighthouse 1917/1996-09
986 # currently uninhabited
987 # see Mark Fineman, "An Isle Rich in Guano and Discord",
988 # _Los Angeles Times_ (1998-11-10), A1, A10; it cites
989 # Jimmy Skaggs, _The Great Guano Rush_ (1994).
990
991 ################################################################################
992
993
994 # From Paul Eggert (2014-10-31):
995 #
996 # Unless otherwise specified, the source for data through 1990 is:
997 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
998 # San Diego: ACS Publications, Inc. (2003).
999 # Unfortunately this book contains many errors and cites no sources.
1000 #
1001 # Gwillim Law writes that a good source
1002 # for recent time zone data is the International Air Transport
1003 # Association's Standard Schedules Information Manual (IATA SSIM),
1004 # published semiannually. Law sent in several helpful summaries
1005 # of the IATA's data after 1990. Except where otherwise noted,
1006 # IATA SSIM is the source for entries after 1990.
1007 #
1008 # Other sources occasionally used include:
1009 #
1010 # Edward W. Whitman, World Time Differences,
1011 # Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated),
1012 # which I found in the UCLA library.
1013 #
1014 # William Willett, The Waste of Daylight, 19th edition
1015 # <http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf>
1016 # [PDF] (1914-03)
1017 #
1018 # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94
1019 # <http://www.jstor.org/stable/1774359>.
1020 #
1021 # See the 'europe' file for Greenland.
1022
1023 # Canada
1024
1025 # From Alain LaBonté (1994-11-14):
1026 # I post here the time zone abbreviations standardized in Canada
1027 # for both English and French in the CAN/CSA-Z234.4-89 standard....
1084 # P.E.I. will follow US rules....
1085 # http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf
1086 # ...
1087 # Province of Newfoundland and Labrador....
1088 # http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm
1089 # ...
1090 # Yukon
1091 # http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf
1092 # ...
1093 # N.W.T. will follow US rules. Whoever maintains the government web site
1094 # does not seem to believe in bookmarks. To see the news release, click the
1095 # following link and search for "Daylight Savings Time Change". Press the
1096 # "Daylight Savings Time Change" link; it will fire off a popup using
1097 # JavaScript.
1098 # http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive
1099 # ...
1100 # Nunavut
1101 # An amendment to the Interpretation Act was registered on February 19/2007....
1102 # http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf
1103
1104 # From Paul Eggert (2014-10-18):
1105 # H. David Matthews and Mary Vincent's map
1106 # "It's about TIME", _Canadian Geographic_ (September-October 1998)
1107 # http://www.canadiangeographic.ca/Magazine/SO98/alacarte.asp
1108 # contains detailed boundaries for regions observing nonstandard
1109 # time and daylight saving time arrangements in Canada circa 1998.
1110 #
1111 # National Research Council Canada maintains info about time zones and DST.
1112 # http://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html
1113 # http://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5
1114 # Its unofficial information is often taken from Matthews and Vincent.
1115
1116 # From Paul Eggert (2006-06-27):
1117 # For now, assume all of DST-observing Canada will fall into line with the
1118 # new US DST rules,
1119
1120 # From Chris Walton (2011-12-01)
1121 # In the first of Tammy Hardwick's articles
1122 # http://www.ilovecreston.com/?p=articles&t=spec&ar=260
1123 # she quotes the Friday November 1/1918 edition of the Creston Review.
1124 # The quote includes these two statements:
1125 # 'Sunday the CPR went back to the old system of time...'
1126 # '... The daylight saving scheme was dropped all over Canada at the same time,'
1127 # These statements refer to a transition from daylight time to standard time
1128 # that occurred nationally on Sunday October 27/1918. This transition was
1129 # also documented in the Saturday October 26/1918 edition of the Toronto Star.
1130
1131 # In light of that evidence, we alter the date from the earlier believed
1132 # Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day
1133 # than Thursday) in all Canadian rulesets.
1958 # mountain time, which they had used before the advent of Nunavut's
1959 # unified time zone in 1999.
1960 #
1961 # From Rives McDow (2001-01-20), quoting the Nunavut government:
1962 # The preceding decision came into effect at midnight, Saturday Nov 4, 2000.
1963
1964 # From Paul Eggert (2000-12-04):
1965 # Let's just keep track of the official times for now.
1966
1967 # From Rives McDow (2001-03-07):
1968 # The premier of Nunavut has issued a ministerial statement advising
1969 # that effective 2001-04-01, the territory of Nunavut will revert
1970 # back to three time zones (mountain, central, and eastern). Of the
1971 # cities in Nunavut, Coral Harbor is the only one that I know of that
1972 # has said it will not observe dst, staying on EST year round. I'm
1973 # checking for more info, and will get back to you if I come up with
1974 # more.
1975 # [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).]
1976
1977 # From Gwillim Law (2005-05-21):
1978 # According to ...
1979 # http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp
1980 # (from a 1998 Canadian Geographic article), the de facto and de jure time
1981 # for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year
1982 # round. Using Google, it's easy to find other websites that confirm this.
1983 # I wasn't able to find how far back this time regimen goes, but since it
1984 # predates the creation of Nunavut, it probably goes back many years....
1985 # The Inuktitut name of Coral Harbour is Sallit, but it's rarely used.
1986 #
1987 # From Paul Eggert (2014-10-17):
1988 # For lack of better information, assume that Southampton Island observed
1989 # daylight saving only during wartime. Gwillim Law's email also
1990 # mentioned maps now maintained by National Research Council Canada;
1991 # see above for an up-to-date link.
1992
1993 # From Chris Walton (2007-03-01):
1994 # ... the community of Resolute (located on Cornwallis Island in
1995 # Nunavut) moved from Central Time to Eastern Time last November.
1996 # Basically the community did not change its clocks at the end of
1997 # daylight saving....
1998 # http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html
1999
2000 # From Chris Walton (2011-03-21):
2001 # Back in 2007 I initiated the creation of a new "zone file" for Resolute
2002 # Bay. Resolute Bay is a small community located about 900km north of
2003 # the Arctic Circle. The zone file was required because Resolute Bay had
2004 # decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007.
2005 #
2006 # According to new information which I received last week, Resolute Bay
2007 # went back to using UTC-6 in the winter of 2007-2008...
2008 #
2009 # On March 11/2007 most of Canada went onto daylight saving. On March
2010 # 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I
2011 # talked to somebody that was both knowledgeable and helpful. I was able
2107 -7:00 NT_YK M%sT 1980
2108 -7:00 Canada M%sT
2109 Zone America/Inuvik 0 - zzz 1953 # Inuvik founded
2110 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00
2111 -7:00 NT_YK M%sT 1980
2112 -7:00 Canada M%sT
2113 Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20
2114 -9:00 NT_YK Y%sT 1966 Jul 1 2:00
2115 -8:00 NT_YK P%sT 1980
2116 -8:00 Canada P%sT
2117 Zone America/Dawson -9:17:40 - LMT 1900 Aug 20
2118 -9:00 NT_YK Y%sT 1973 Oct 28 0:00
2119 -8:00 NT_YK P%sT 1980
2120 -8:00 Canada P%sT
2121
2122
2123 ###############################################################################
2124
2125 # Mexico
2126
2127 # From Paul Eggert (2014-12-07):
2128 # The Investigation and Analysis Service of the
2129 # Mexican Library of Congress (MLoC) has published a
2130 # history of Mexican local time (in Spanish)
2131 # http://www.diputados.gob.mx/bibliot/publica/inveyana/polisoc/horver/index.htm
2132 #
2133 # Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC.
2134 # (In all cases we go with the MLoC.)
2135 # S&P report that Baja was at -8:00 in 1922/1923.
2136 # S&P say the 1930 transition in Baja was 1930-11-16.
2137 # S&P report no DST during summer 1931.
2138 # S&P report a transition at 1932-03-30 23:00, not 1932-04-01.
2139
2140 # From Gwillim Law (2001-02-20):
2141 # There are some other discrepancies between the Decrees page and the
2142 # tz database. I think they can best be explained by supposing that
2143 # the researchers who prepared the Decrees page failed to find some of
2144 # the relevant documents.
2145
2146 # From Alan Perry (1996-02-15):
2147 # A guy from our Mexico subsidiary finally found the Presidential Decree
2148 # outlining the timezone changes in Mexico.
2149 #
2150 # ------------- Begin Forwarded Message -------------
2151 #
2280 # http://www.timeanddate.com/news/time/north-mexico-dst-change.html
2281
2282 # From Arthur David Olson (2010-01-20):
2283 # The page
2284 # http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010
2285 # includes this text:
2286 # En los municipios fronterizos de Tijuana y Mexicali en Baja California;
2287 # Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila;
2288 # Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en
2289 # Tamaulipas, la aplicación de este horario estacional surtirá efecto
2290 # desde las dos horas del segundo domingo de marzo y concluirá a las dos
2291 # horas del primer domingo de noviembre.
2292 # En los municipios fronterizos que se encuentren ubicados en la franja
2293 # fronteriza norte en el territorio comprendido entre la línea
2294 # internacional y la línea paralela ubicada a una distancia de veinte
2295 # kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el
2296 # interior del país, la aplicación de este horario estacional surtirá
2297 # efecto desde las dos horas del segundo domingo de marzo y concluirá a
2298 # las dos horas del primer domingo de noviembre.
2299
2300 # From Steffen Thorsen (2014-12-08), translated by Gwillim Law:
2301 # The Mexican state of Quintana Roo will likely change to EST in 2015.
2302 #
2303 # http://www.unioncancun.mx/articulo/2014/12/04/medio-ambiente/congreso-aprueba-una-hora-mas-de-sol-en-qroo
2304 # "With this change, the time conflict that has existed between the municipios
2305 # of Quintana Roo and the municipio of Felipe Carrillo Puerto may come to an
2306 # end. The latter declared itself in rebellion 15 years ago when a time change
2307 # was initiated in Mexico, and since then it has refused to change its time
2308 # zone along with the rest of the country."
2309 #
2310 # From Steffen Thorsen (2015-01-14), translated by Gwillim Law:
2311 # http://sipse.com/novedades/confirman-aplicacion-de-nueva-zona-horaria-para-quintana-roo-132331.html
2312 # "...the new time zone will come into effect at two o'clock on the first Sunday
2313 # of February, when we will have to advance the clock one hour from its current
2314 # time..."
2315 #
2316 # Also, the new zone will not use DST.
2317
2318 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2319 Rule Mexico 1939 only - Feb 5 0:00 1:00 D
2320 Rule Mexico 1939 only - Jun 25 0:00 0 S
2321 Rule Mexico 1940 only - Dec 9 0:00 1:00 D
2322 Rule Mexico 1941 only - Apr 1 0:00 0 S
2323 Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War
2324 Rule Mexico 1944 only - May 1 0:00 0 S
2325 Rule Mexico 1950 only - Feb 12 0:00 1:00 D
2326 Rule Mexico 1950 only - Jul 30 0:00 0 S
2327 Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D
2328 Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S
2329 Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D
2330 Rule Mexico 2001 only - Sep lastSun 2:00 0 S
2331 Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D
2332 Rule Mexico 2002 max - Oct lastSun 2:00 0 S
2333 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2334 # Quintana Roo; represented by Cancún
2335 Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56
2336 -6:00 - CST 1981 Dec 23
2337 -5:00 Mexico E%sT 1998 Aug 2 2:00
2338 -6:00 Mexico C%sT 2015 Feb 1 2:00
2339 -5:00 - EST
2340 # Campeche, Yucatán; represented by Mérida
2341 Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32
2342 -6:00 - CST 1981 Dec 23
2343 -5:00 - EST 1982 Dec 2
2344 -6:00 Mexico C%sT
2345 # Coahuila, Durango, Nuevo León, Tamaulipas (near US border)
2346 Zone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00
2347 -6:00 - CST 1988
2348 -6:00 US C%sT 1989
2349 -6:00 Mexico C%sT 2010
2350 -6:00 US C%sT
2351 # Coahuila, Durango, Nuevo León, Tamaulipas (away from US border)
2352 Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44
2353 -6:00 - CST 1988
2354 -6:00 US C%sT 1989
2355 -6:00 Mexico C%sT
2356 # Central Mexico
2357 Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24
2358 -7:00 - MST 1927 Jun 10 23:00
2359 -6:00 - CST 1930 Nov 15
2991
2992 # From Steffen Thorsen (2007-03-30):
2993 # http://www.laprensahn.com/pais_nota.php?id04962=7386
2994 # So it seems that Honduras will not enter DST this year....
2995
2996 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2997 Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D
2998 Rule Hond 1987 1988 - Sep lastSun 0:00 0 S
2999 Rule Hond 2006 only - May Sun>=1 0:00 1:00 D
3000 Rule Hond 2006 only - Aug Mon>=1 0:00 0 S
3001 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3002 Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr
3003 -6:00 Hond C%sT
3004 #
3005 # Great Swan I ceded by US to Honduras in 1972
3006
3007 # Jamaica
3008 # Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an
3009 # unspecified official document, and says "This time is used throughout the
3010 # island". Go with Milne. Round to the nearest second as required by zic.
3011 #
3012 # Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but
3013 # Lance Neita writes that Prime Minister Michael Manley decreed it January 5.
3014 # Assume Neita meant Jan 6 02:00, the same as the US. Neita also writes that
3015 # Manley's supporters associated this act with Manley's nickname "Joshua"
3016 # (recall that in the Bible the sun stood still at Joshua's request),
3017 # and with the Rod of Correction which Manley said he had received from
3018 # Haile Selassie, Emperor of Ethiopia. See:
3019 # Neita L. The politician in all of us. Jamaica Observer 2014-09-20
3020 # http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647
3021 #
3022 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3023 Zone America/Jamaica -5:07:11 - LMT 1890 # Kingston
3024 -5:07:11 - KMT 1912 Feb # Kingston Mean Time
3025 -5:00 - EST 1974
3026 -5:00 US E%sT 1984
3027 -5:00 - EST
3028
3029 # Martinique
3030 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3031 Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France
3032 -4:04:20 - FFMT 1911 May # Fort-de-France MT
3033 -4:00 - AST 1980 Apr 6
3034 -4:00 1:00 ADT 1980 Sep 28
3035 -4:00 - AST
3036
3037 # Montserrat
3038 # See America/Port_of_Spain.
3039
3040 # Nicaragua
3041 #
3042 # This uses Shanks & Pottenger for times before 2005.
3043 #
3044 # From Steffen Thorsen (2005-04-12):
3045 # I've got reports from 8 different people that Nicaragua just started
3133
3134 # Turks and Caicos
3135 #
3136 # From Chris Dunn in
3137 # http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007
3138 # (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the
3139 # daylight saving dates for time changes have been adjusted to match
3140 # the recent U.S. change of dates.
3141 #
3142 # From Brian Inglis (2007-04-28):
3143 # http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26]
3144 # there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three
3145 # rows before that there is an out of date entry for Oct:
3146 # "Eastern Standard Times Begins 2007
3147 # Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time"
3148 # indicating that the normal ET rules are followed.
3149 #
3150 # From Paul Eggert (2014-08-19):
3151 # The 2014-08-13 Cabinet meeting decided to stay on UTC-4 year-round. See:
3152 # http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm
3153 # Model this as a switch from EST/EDT to AST ...
3154 # From Chris Walton (2014-11-04):
3155 # ... the TCI government appears to have delayed the switch to
3156 # "permanent daylight saving time" by one year....
3157 # http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm
3158 #
3159 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
3160 Zone America/Grand_Turk -4:44:32 - LMT 1890
3161 -5:07:11 - KMT 1912 Feb # Kingston Mean Time
3162 -5:00 - EST 1979
3163 -5:00 US E%sT 2015 Nov Sun>=1 2:00
3164 -4:00 - AST
3165
3166 # British Virgin Is
3167 # Virgin Is
3168 # See America/Port_of_Spain.
3169
3170
3171 # Local Variables:
3172 # coding: utf-8
3173 # End:
|