210 # Atlantic standard time
211 # eastern standard time
212 # central standard time
213 # mountain standard time
214 # Pacific standard time
215 # Yukon standard time
216 # Alaska-Hawaii standard time
217 # Bering standard time
218 # And after 1983-11-30:
219 # Atlantic standard time
220 # eastern standard time
221 # central standard time
222 # mountain standard time
223 # Pacific standard time
224 # Alaska standard time
225 # Hawaii-Aleutian standard time
226 # Samoa standard time
227 # The law doesn't give abbreviations.
228 #
229 # From Paul Eggert (2000-01-08), following a heads-up from Rives McDow:
230 # Public law 106-564 (2000-12-23) introduced the abbreviation
231 # "Chamorro Standard Time" for time in Guam and the Northern Marianas.
232 # See the file "australasia".
233
234 # From Arthur David Olson, 2005-08-09
235 # The following was signed into law on 2005-08-08.
236 #
237 # H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS.
238 # (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15
239 # U.S.C. 260a(a)) is amended--
240 # (1) by striking "first Sunday of April" and inserting "second
241 # Sunday of March"; and
242 # (2) by striking "last Sunday of October" and inserting "first
243 # Sunday of November'.
244 # (b) Effective Date.--Subsection (a) shall take effect 1 year after the
245 # date of enactment of this Act or March 1, 2007, whichever is later.
246 # (c) Report to Congress.--Not later than 9 months after the effective
247 # date stated in subsection (b), the Secretary shall report to Congress
248 # on the impact of this section on energy consumption in the United
249 # States.
250 # (d) Right to Revert.--Congress retains the right to revert the
251 # Daylight Saving Time back to the 2005 time schedules once the
252 # Department study is complete.
519 -10:00 US AH%sT 1983 Oct 30 2:00
520 -9:00 US Y%sT 1983 Nov 30
521 -9:00 US AK%sT
522 Zone America/Nome 12:58:21 - LMT 1867 Oct 18
523 -11:01:38 - LMT 1900 Aug 20 12:00
524 -11:00 - NST 1942
525 -11:00 US N%sT 1946
526 -11:00 - NST 1967 Apr
527 -11:00 - BST 1969
528 -11:00 US B%sT 1983 Oct 30 2:00
529 -9:00 US Y%sT 1983 Nov 30
530 -9:00 US AK%sT
531 Zone America/Adak 12:13:21 - LMT 1867 Oct 18
532 -11:46:38 - LMT 1900 Aug 20 12:00
533 -11:00 - NST 1942
534 -11:00 US N%sT 1946
535 -11:00 - NST 1967 Apr
536 -11:00 - BST 1969
537 -11:00 US B%sT 1983 Oct 30 2:00
538 -10:00 US AH%sT 1983 Nov 30
539 -10:00 US HA%sT
540 # The following switches don't quite make our 1970 cutoff.
541 #
542 # Shanks writes that part of southwest Alaska (e.g. Aniak)
543 # switched from -11:00 to -10:00 on 1968-09-22 at 02:00,
544 # and another part (e.g. Akiak) made the same switch five weeks later.
545 #
546 # From David Flater (2004-11-09):
547 # In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska
548 # Historic Preservation Commission, provided this information, which
549 # suggests that Unalaska deviated from statutory time from early 1967
550 # possibly until 1983:
551 #
552 # Minutes of the Unalaska City Council Meeting, January 10, 1967:
553 # "Except for St. Paul and Akutan, Unalaska is the only important
554 # location not on Alaska Standard Time. The following resolution was
555 # made by William Robinson and seconded by Henry Swanson: Be it
556 # resolved that the City of Unalaska hereby goes to Alaska Standard
557 # Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday,
558 # January 14, Alaska Standard Time.) This resolution was passed with
559 # three votes for and one against."
1213 -3:30 Canada N%sT
1214
1215 # most of east Labrador
1216
1217 # The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'.
1218 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1219 Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay
1220 -3:30:52 - NST 1918
1221 -3:30:52 Canada N%sT 1919
1222 -3:30:52 - NST 1935 Mar 30
1223 -3:30 - NST 1936
1224 -3:30 StJohns N%sT 1942 May 11
1225 -3:30 Canada N%sT 1946
1226 -3:30 StJohns N%sT 1966 Mar 15 2:00
1227 -4:00 StJohns A%sT 2011 Nov
1228 -4:00 Canada A%sT
1229
1230
1231 # west Labrador, Nova Scotia, Prince Edward I
1232
1233 # From Paul Eggert (2006-03-22):
1234 # Shanks & Pottenger write that since 1970 most of this region has been like
1235 # Halifax. Many locales did not observe peacetime DST until 1972;
1236 # Glace Bay, NS is the largest that we know of.
1237 # Shanks & Pottenger also write that Liverpool, NS was the only town
1238 # in Canada to observe DST in 1971 but not 1970; for now we'll assume
1239 # this is a typo.
1240
1241 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1242 Rule Halifax 1916 only - Apr 1 0:00 1:00 D
1243 Rule Halifax 1916 only - Oct 1 0:00 0 S
1244 Rule Halifax 1920 only - May 9 0:00 1:00 D
1245 Rule Halifax 1920 only - Aug 29 0:00 0 S
1246 Rule Halifax 1921 only - May 6 0:00 1:00 D
1247 Rule Halifax 1921 1922 - Sep 5 0:00 0 S
1248 Rule Halifax 1922 only - Apr 30 0:00 1:00 D
1249 Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D
1250 Rule Halifax 1923 only - Sep 4 0:00 0 S
1251 Rule Halifax 1924 only - Sep 15 0:00 0 S
1252 Rule Halifax 1925 only - Sep 28 0:00 0 S
1253 Rule Halifax 1926 only - May 16 0:00 1:00 D
1254 Rule Halifax 1926 only - Sep 13 0:00 0 S
1255 Rule Halifax 1927 only - May 1 0:00 1:00 D
1256 Rule Halifax 1927 only - Sep 26 0:00 0 S
1314 Rule Moncton 1940 only - May 19 1:00 1:00 D
1315 Rule Moncton 1941 only - May 4 1:00 1:00 D
1316 Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D
1317 Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S
1318 Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S
1319 Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D
1320 Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S
1321 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1322 Zone America/Moncton -4:19:08 - LMT 1883 Dec 9
1323 -5:00 - EST 1902 Jun 15
1324 -4:00 Canada A%sT 1933
1325 -4:00 Moncton A%sT 1942
1326 -4:00 Canada A%sT 1946
1327 -4:00 Moncton A%sT 1973
1328 -4:00 Canada A%sT 1993
1329 -4:00 Moncton A%sT 2007
1330 -4:00 Canada A%sT
1331
1332 # Quebec
1333
1334 # From Paul Eggert (2013-08-30):
1335 # Since 1970 most of Quebec has been like Toronto.
1336 # However, because earlier versions of the tz database mistakenly relied on data
1337 # from Shanks & Pottenger saying that Quebec differed from Ontario after 1970,
1338 # a separate entry was created for most of Quebec. We're loath to lose
1339 # its pre-1970 info, even though the tz database is normally limited to
1340 # zones that differ after 1970, so keep this otherwise out-of-scope entry.
1341
1342 # Matthews and Vincent (1998) also write that Quebec east of the -63
1343 # meridian is supposed to observe AST, but residents as far east as
1344 # Natashquan use EST/EDT, and residents east of Natashquan use AST.
1345 # The Quebec department of justice writes in
1346 # "The situation in Minganie and Basse-Côte-Nord"
1347 # http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm
1348 # that the coastal strip from just east of Natashquan to Blanc-Sablon
1349 # observes Atlantic standard time all year round.
1350 # http://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en
1351 # says this common practice was codified into law as of 2007.
1352 # For lack of better info, guess this practice began around 1970, contra to
1353 # Shanks & Pottenger who have this region observing AST/ADT.
1354
1355 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1356 Rule Mont 1917 only - Mar 25 2:00 1:00 D
1357 Rule Mont 1917 only - Apr 24 0:00 0 S
1358 Rule Mont 1919 only - Mar 31 2:30 1:00 D
1359 Rule Mont 1919 only - Oct 25 2:30 0 S
1360 Rule Mont 1920 only - May 2 2:30 1:00 D
1361 Rule Mont 1920 1922 - Oct Sun>=1 2:30 0 S
1362 Rule Mont 1921 only - May 1 2:00 1:00 D
1363 Rule Mont 1922 only - Apr 30 2:00 1:00 D
1364 Rule Mont 1924 only - May 17 2:00 1:00 D
1365 Rule Mont 1924 1926 - Sep lastSun 2:30 0 S
1366 Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D
1367 Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D
1368 Rule Mont 1927 1937 - Sep lastSat 24:00 0 S
1369 Rule Mont 1938 1940 - Apr lastSun 0:00 1:00 D
1370 Rule Mont 1938 1939 - Sep lastSun 0:00 0 S
1371 Rule Mont 1946 1973 - Apr lastSun 2:00 1:00 D
1372 Rule Mont 1945 1948 - Sep lastSun 2:00 0 S
1373 Rule Mont 1949 1950 - Oct lastSun 2:00 0 S
1374 Rule Mont 1951 1956 - Sep lastSun 2:00 0 S
1375 Rule Mont 1957 1973 - Oct lastSun 2:00 0 S
1376
1377 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1378 Zone America/Blanc-Sablon -3:48:28 - LMT 1884
1379 -4:00 Canada A%sT 1970
1380 -4:00 - AST
1381 Zone America/Montreal -4:54:16 - LMT 1884
1382 -5:00 Mont E%sT 1918
1383 -5:00 Canada E%sT 1919
1384 -5:00 Mont E%sT 1942 Feb 9 2:00s
1385 -5:00 Canada E%sT 1946
1386 -5:00 Mont E%sT 1974
1387 -5:00 Canada E%sT
1388
1389 # Ontario
1390
1391 # From Paul Eggert (2006-07-09):
1392 # Shanks & Pottenger write that since 1970 most of Ontario has been like
1393 # Toronto.
1394 # Thunder Bay skipped DST in 1973.
1395 # Many smaller locales did not observe peacetime DST until 1974;
1396 # Nipigon (EST) and Rainy River (CST) are the largest that we know of.
1397 # Far west Ontario is like Winnipeg; far east Quebec is like Halifax.
1398
1399 # From Mark Brader (2003-07-26):
1400 # [According to the Toronto Star] Orillia, Ontario, adopted DST
1401 # effective Saturday, 1912-06-22, 22:00; the article mentions that
1402 # Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw
1403 # have already done so. In Orillia DST was to run until Saturday,
1404 # 1912-08-31 (no time mentioned), but it was met with considerable
1405 # hostility from certain segments of the public, and was revoked after
1406 # only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but
1407 # presumably that should be -07-06. (1912-06-19, -07-12; also letters
1808 # http://www.ilovecreston.com/?p=articles&t=spec&ar=260
1809 # According to the article, Creston has not changed its clocks since June 1918.
1810 # i.e. Creston has been stuck on UTC-7 for 93 years.
1811 # Dawson Creek, on the other hand, changed its clocks as recently as April 1972.
1812
1813 # Unfortunately the exact date for the time change in June 1918 remains
1814 # unknown and will be difficult to ascertain. I e-mailed Tammy a few months
1815 # ago to ask if Sunday June 2 was a reasonable guess. She said it was just
1816 # as plausible as any other date (in June). She also said that after writing
1817 # the article she had discovered another time change in 1916; this is the
1818 # subject of another article which she wrote in October 2010.
1819 # http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56
1820
1821 # Here is a summary of the three clock change events in Creston's history:
1822 # 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7)
1823 # Exact date unknown
1824 # 2. Oct 1916: switch to Pacific Standard Time (GMT-8)
1825 # Exact date in October unknown; Sunday October 1 is a reasonable guess.
1826 # 3. June 1918: switch to Pacific Daylight Time (GMT-7)
1827 # Exact date in June unknown; Sunday June 2 is a reasonable guess.
1828 # note#1:
1829 # On Oct 27/1918 when daylight saving ended in the rest of Canada,
1830 # Creston did not change its clocks.
1831 # note#2:
1832 # During WWII when the Federal Government legislated a mandatory clock change,
1833 # Creston did not oblige.
1834 # note#3:
1835 # There is no guarantee that Creston will remain on Mountain Standard Time
1836 # (UTC-7) forever.
1837 # The subject was debated at least once this year by the town Council.
1838 # http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html
1839
1840 # During a period WWII, summer time (Daylight saying) was mandatory in Canada.
1841 # In Creston, that was handled by shifting the area to PST (-8:00) then applying
1842 # summer time to cause the offset to be -7:00, the same as it had been before
1843 # the change. It can be argued that the timezone abbreviation during this
1844 # period should be PDT rather than MST, but that doesn't seem important enough
1845 # (to anyone) to further complicate the rules.
1846
1847 # The transition dates (and times) are guesses.
1848
1849 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1850 Rule Vanc 1918 only - Apr 14 2:00 1:00 D
1851 Rule Vanc 1918 only - Oct 27 2:00 0 S
1852 Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War
1853 Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace
1854 Rule Vanc 1945 only - Sep 30 2:00 0 S
1855 Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D
1856 Rule Vanc 1946 only - Oct 13 2:00 0 S
1857 Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S
1858 Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S
1859 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1860 Zone America/Vancouver -8:12:28 - LMT 1884
1861 -8:00 Vanc P%sT 1987
1862 -8:00 Canada P%sT
1863 Zone America/Dawson_Creek -8:00:56 - LMT 1884
1864 -8:00 Canada P%sT 1947
1865 -8:00 Vanc P%sT 1972 Aug 30 2:00
1866 -7:00 - MST
1867 Zone America/Creston -7:46:04 - LMT 1884
1868 -7:00 - MST 1916 Oct 1
1869 -8:00 - PST 1918 Jun 2
1870 -7:00 - MST
1871
1872 # Northwest Territories, Nunavut, Yukon
1873
1874 # From Paul Eggert (2006-03-22):
1875 # Dawson switched to PST in 1973. Inuvik switched to MST in 1979.
1876 # Mathew Englander (1996-10-07) gives the following refs:
1877 # * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,
1878 # c. 7 defines Yukon standard time as UTC-9. This is still valid;
1879 # see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1).
1880 # * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00.
1881 # * O.I.C. 1980/02 established DST.
1882 # * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00.
1883 # Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go
1884 # with Englander.
1885 # From Chris Walton (2006-06-26):
1886 # Here is a link to the old daylight saving portion of the interpretation
1887 # act which was last updated in 1987:
1888 # http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf
1889
1890 # From Rives McDow (1999-09-04):
1891 # Nunavut ... moved ... to incorporate the whole territory into one time zone.
1892 # Nunavut moves to single time zone Oct. 31
1893 # http://www.nunatsiaq.com/nunavut/nvt90903_13.html
1894 #
1895 # From Antoine Leca (1999-09-06):
1896 # We then need to create a new timezone for the Kitikmeot region of Nunavut
1897 # to differentiate it from the Yellowknife region.
1898
1899 # From Paul Eggert (1999-09-20):
1900 # Basic Facts: The New Territory
1901 # http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html
1902 # (1999) reports that Pangnirtung operates on eastern time,
1903 # and that Coral Harbour does not observe DST. We don't know when
1904 # Pangnirtung switched to eastern time; we'll guess 1995.
1905
1906 # From Rives McDow (1999-11-08):
1907 # On October 31, when the rest of Nunavut went to Central time,
1908 # Pangnirtung wobbled. Here is the result of their wobble:
1909 #
2094 # aka Kangiqiniq
2095 Zone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded
2096 -6:00 NT_YK C%sT 2000 Oct 29 2:00
2097 -5:00 - EST 2001 Apr 1 3:00
2098 -6:00 Canada C%sT
2099 # aka Iqaluktuuttiaq
2100 Zone America/Cambridge_Bay 0 - zzz 1920 # trading post est.?
2101 -7:00 NT_YK M%sT 1999 Oct 31 2:00
2102 -6:00 Canada C%sT 2000 Oct 29 2:00
2103 -5:00 - EST 2000 Nov 5 0:00
2104 -6:00 - CST 2001 Apr 1 3:00
2105 -7:00 Canada M%sT
2106 Zone America/Yellowknife 0 - zzz 1935 # Yellowknife founded?
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.)
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
2491 -8:00 US P%sT 2002 Feb 20
2492 -8:00 Mexico P%sT
2493 # From Paul Eggert (2006-03-22):
2494 # Formerly there was an America/Ensenada zone, which differed from
2495 # America/Tijuana only in that it did not observe DST from 1976
2496 # through 1995. This was as per Shanks (1999). But Shanks & Pottenger say
2497 # Ensenada did not observe DST from 1948 through 1975. Guy Harris reports
2498 # that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and
2499 # Tijuana observe DST," which agrees with Shanks & Pottenger but implies that
2500 # DST-observance was a town-by-town matter back then. This concerns
2501 # data after 1970 so most likely there should be at least one Zone
2502 # other than America/Tijuana for Baja, but it's not clear yet what its
2503 # name or contents should be.
2504 #
2505 # Revillagigedo Is
2506 # no information
2507
2508 ###############################################################################
2509
2510 # Anguilla
2511 # See America/Port_of_Spain.
2512
2513 # Antigua and Barbuda
2514 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2515 Zone America/Antigua -4:07:12 - LMT 1912 Mar 2
2516 -5:00 - EST 1951
2517 -4:00 - AST
2518
2519 # Bahamas
2520 #
2521 # For 1899 Milne gives -5:09:29.5; round that.
2522 #
2523 # From Sue Williams (2006-12-07):
2524 # The Bahamas announced about a month ago that they plan to change their DST
2525 # rules to sync with the U.S. starting in 2007....
2526 # http://www.jonesbahamas.com/?c=45&a=10412
2527
2528 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2529 Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S
2530 Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D
2531 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2532 Zone America/Nassau -5:09:30 - LMT 1912 Mar 2
2533 -5:00 Bahamas E%sT 1976
2534 -5:00 US E%sT
2535
2536 # Barbados
2537
2538 # For 1899 Milne gives -3:58:29.2; round that.
2564 # Bermuda
2565
2566 # For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower,
2567 # Bermuda dockyard, Ireland I; round that.
2568
2569 # From Dan Jones, reporting in The Royal Gazette (2006-06-26):
2570
2571 # Next year, however, clocks in the US will go forward on the second Sunday
2572 # in March, until the first Sunday in November. And, after the Time Zone
2573 # (Seasonal Variation) Bill 2006 was passed in the House of Assembly on
2574 # Friday, the same thing will happen in Bermuda.
2575 # http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135
2576
2577 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2578 Zone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton
2579 -4:00 - AST 1974 Apr 28 2:00
2580 -4:00 Canada A%sT 1976
2581 -4:00 US A%sT
2582
2583 # Cayman Is
2584 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2585 Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown
2586 -5:07:11 - KMT 1912 Feb # Kingston Mean Time
2587 -5:00 - EST
2588
2589 # Costa Rica
2590
2591 # Milne gives -5:36:13.3 as San José mean time; round to nearest.
2592
2593 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2594 Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D
2595 Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S
2596 Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D
2597 # IATA SSIM (1991-09) says the following was at 1:00;
2598 # go with Shanks & Pottenger.
2599 Rule CR 1991 only - Jul 1 0:00 0 S
2600 Rule CR 1992 only - Mar 15 0:00 0 S
2601 # There are too many San Josés elsewhere, so we'll use 'Costa Rica'.
2602 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2603 Zone America/Costa_Rica -5:36:13 - LMT 1890 # San José
2604 -5:36:13 - SJMT 1921 Jan 15 # San José Mean Time
2605 -6:00 CR C%sT
2606 # Coco
2607 # no information; probably like America/Costa_Rica
|
210 # Atlantic standard time
211 # eastern standard time
212 # central standard time
213 # mountain standard time
214 # Pacific standard time
215 # Yukon standard time
216 # Alaska-Hawaii standard time
217 # Bering standard time
218 # And after 1983-11-30:
219 # Atlantic standard time
220 # eastern standard time
221 # central standard time
222 # mountain standard time
223 # Pacific standard time
224 # Alaska standard time
225 # Hawaii-Aleutian standard time
226 # Samoa standard time
227 # The law doesn't give abbreviations.
228 #
229 # From Paul Eggert (2000-01-08), following a heads-up from Rives McDow:
230 # Public law 106-564 (2000-12-23) introduced ... "Chamorro Standard Time"
231 # for time in Guam and the Northern Marianas. See the file "australasia".
232 #
233 # From Paul Eggert (2015-04-17):
234 # HST and HDT are standardized abbreviations for Hawaii-Aleutian
235 # standard and daylight times. See section 9.47 (p 234) of the
236 # U.S. Government Printing Office Style Manual (2008)
237 # http://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf
238
239 # From Arthur David Olson, 2005-08-09
240 # The following was signed into law on 2005-08-08.
241 #
242 # H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS.
243 # (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15
244 # U.S.C. 260a(a)) is amended--
245 # (1) by striking "first Sunday of April" and inserting "second
246 # Sunday of March"; and
247 # (2) by striking "last Sunday of October" and inserting "first
248 # Sunday of November'.
249 # (b) Effective Date.--Subsection (a) shall take effect 1 year after the
250 # date of enactment of this Act or March 1, 2007, whichever is later.
251 # (c) Report to Congress.--Not later than 9 months after the effective
252 # date stated in subsection (b), the Secretary shall report to Congress
253 # on the impact of this section on energy consumption in the United
254 # States.
255 # (d) Right to Revert.--Congress retains the right to revert the
256 # Daylight Saving Time back to the 2005 time schedules once the
257 # Department study is complete.
524 -10:00 US AH%sT 1983 Oct 30 2:00
525 -9:00 US Y%sT 1983 Nov 30
526 -9:00 US AK%sT
527 Zone America/Nome 12:58:21 - LMT 1867 Oct 18
528 -11:01:38 - LMT 1900 Aug 20 12:00
529 -11:00 - NST 1942
530 -11:00 US N%sT 1946
531 -11:00 - NST 1967 Apr
532 -11:00 - BST 1969
533 -11:00 US B%sT 1983 Oct 30 2:00
534 -9:00 US Y%sT 1983 Nov 30
535 -9:00 US AK%sT
536 Zone America/Adak 12:13:21 - LMT 1867 Oct 18
537 -11:46:38 - LMT 1900 Aug 20 12:00
538 -11:00 - NST 1942
539 -11:00 US N%sT 1946
540 -11:00 - NST 1967 Apr
541 -11:00 - BST 1969
542 -11:00 US B%sT 1983 Oct 30 2:00
543 -10:00 US AH%sT 1983 Nov 30
544 -10:00 US H%sT
545 # The following switches don't quite make our 1970 cutoff.
546 #
547 # Shanks writes that part of southwest Alaska (e.g. Aniak)
548 # switched from -11:00 to -10:00 on 1968-09-22 at 02:00,
549 # and another part (e.g. Akiak) made the same switch five weeks later.
550 #
551 # From David Flater (2004-11-09):
552 # In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska
553 # Historic Preservation Commission, provided this information, which
554 # suggests that Unalaska deviated from statutory time from early 1967
555 # possibly until 1983:
556 #
557 # Minutes of the Unalaska City Council Meeting, January 10, 1967:
558 # "Except for St. Paul and Akutan, Unalaska is the only important
559 # location not on Alaska Standard Time. The following resolution was
560 # made by William Robinson and seconded by Henry Swanson: Be it
561 # resolved that the City of Unalaska hereby goes to Alaska Standard
562 # Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday,
563 # January 14, Alaska Standard Time.) This resolution was passed with
564 # three votes for and one against."
1218 -3:30 Canada N%sT
1219
1220 # most of east Labrador
1221
1222 # The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'.
1223 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1224 Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay
1225 -3:30:52 - NST 1918
1226 -3:30:52 Canada N%sT 1919
1227 -3:30:52 - NST 1935 Mar 30
1228 -3:30 - NST 1936
1229 -3:30 StJohns N%sT 1942 May 11
1230 -3:30 Canada N%sT 1946
1231 -3:30 StJohns N%sT 1966 Mar 15 2:00
1232 -4:00 StJohns A%sT 2011 Nov
1233 -4:00 Canada A%sT
1234
1235
1236 # west Labrador, Nova Scotia, Prince Edward I
1237
1238 # From Brian Inglis (2015-07-20):
1239 # From the historical weather station records available at:
1240 # https://weatherspark.com/history/28351/1971/Sydney-Nova-Scotia-Canada
1241 # Sydney shares the same time history as Glace Bay, so was
1242 # likely to be the same across the island....
1243 # Sydney, as the capital and most populous location, or Cape Breton, would
1244 # have been better names for the zone had we known this in 1996.
1245
1246 # From Paul Eggert (2015-07-20):
1247 # Shanks & Pottenger write that since 1970 most of this region has been like
1248 # Halifax. Many locales did not observe peacetime DST until 1972;
1249 # the Cape Breton area, represented by Glace Bay, is the largest we know of
1250 # (Glace Bay was perhaps not the best name choice but no point changing now).
1251 # Shanks & Pottenger also write that Liverpool, NS was the only town
1252 # in Canada to observe DST in 1971 but not 1970; for now we'll assume
1253 # this is a typo.
1254
1255 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1256 Rule Halifax 1916 only - Apr 1 0:00 1:00 D
1257 Rule Halifax 1916 only - Oct 1 0:00 0 S
1258 Rule Halifax 1920 only - May 9 0:00 1:00 D
1259 Rule Halifax 1920 only - Aug 29 0:00 0 S
1260 Rule Halifax 1921 only - May 6 0:00 1:00 D
1261 Rule Halifax 1921 1922 - Sep 5 0:00 0 S
1262 Rule Halifax 1922 only - Apr 30 0:00 1:00 D
1263 Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D
1264 Rule Halifax 1923 only - Sep 4 0:00 0 S
1265 Rule Halifax 1924 only - Sep 15 0:00 0 S
1266 Rule Halifax 1925 only - Sep 28 0:00 0 S
1267 Rule Halifax 1926 only - May 16 0:00 1:00 D
1268 Rule Halifax 1926 only - Sep 13 0:00 0 S
1269 Rule Halifax 1927 only - May 1 0:00 1:00 D
1270 Rule Halifax 1927 only - Sep 26 0:00 0 S
1328 Rule Moncton 1940 only - May 19 1:00 1:00 D
1329 Rule Moncton 1941 only - May 4 1:00 1:00 D
1330 Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D
1331 Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S
1332 Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S
1333 Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D
1334 Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S
1335 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1336 Zone America/Moncton -4:19:08 - LMT 1883 Dec 9
1337 -5:00 - EST 1902 Jun 15
1338 -4:00 Canada A%sT 1933
1339 -4:00 Moncton A%sT 1942
1340 -4:00 Canada A%sT 1946
1341 -4:00 Moncton A%sT 1973
1342 -4:00 Canada A%sT 1993
1343 -4:00 Moncton A%sT 2007
1344 -4:00 Canada A%sT
1345
1346 # Quebec
1347
1348 # From Paul Eggert (2015-03-24):
1349 # See America/Toronto for most of Quebec, including Montreal.
1350 #
1351 # Matthews and Vincent (1998) also write that Quebec east of the -63
1352 # meridian is supposed to observe AST, but residents as far east as
1353 # Natashquan use EST/EDT, and residents east of Natashquan use AST.
1354 # The Quebec department of justice writes in
1355 # "The situation in Minganie and Basse-Côte-Nord"
1356 # http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm
1357 # that the coastal strip from just east of Natashquan to Blanc-Sablon
1358 # observes Atlantic standard time all year round.
1359 # http://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en
1360 # says this common practice was codified into law as of 2007.
1361 # For lack of better info, guess this practice began around 1970, contra to
1362 # Shanks & Pottenger who have this region observing AST/ADT.
1363
1364 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1365 Zone America/Blanc-Sablon -3:48:28 - LMT 1884
1366 -4:00 Canada A%sT 1970
1367 -4:00 - AST
1368
1369 # Ontario
1370
1371 # From Paul Eggert (2006-07-09):
1372 # Shanks & Pottenger write that since 1970 most of Ontario has been like
1373 # Toronto.
1374 # Thunder Bay skipped DST in 1973.
1375 # Many smaller locales did not observe peacetime DST until 1974;
1376 # Nipigon (EST) and Rainy River (CST) are the largest that we know of.
1377 # Far west Ontario is like Winnipeg; far east Quebec is like Halifax.
1378
1379 # From Mark Brader (2003-07-26):
1380 # [According to the Toronto Star] Orillia, Ontario, adopted DST
1381 # effective Saturday, 1912-06-22, 22:00; the article mentions that
1382 # Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw
1383 # have already done so. In Orillia DST was to run until Saturday,
1384 # 1912-08-31 (no time mentioned), but it was met with considerable
1385 # hostility from certain segments of the public, and was revoked after
1386 # only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but
1387 # presumably that should be -07-06. (1912-06-19, -07-12; also letters
1788 # http://www.ilovecreston.com/?p=articles&t=spec&ar=260
1789 # According to the article, Creston has not changed its clocks since June 1918.
1790 # i.e. Creston has been stuck on UTC-7 for 93 years.
1791 # Dawson Creek, on the other hand, changed its clocks as recently as April 1972.
1792
1793 # Unfortunately the exact date for the time change in June 1918 remains
1794 # unknown and will be difficult to ascertain. I e-mailed Tammy a few months
1795 # ago to ask if Sunday June 2 was a reasonable guess. She said it was just
1796 # as plausible as any other date (in June). She also said that after writing
1797 # the article she had discovered another time change in 1916; this is the
1798 # subject of another article which she wrote in October 2010.
1799 # http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56
1800
1801 # Here is a summary of the three clock change events in Creston's history:
1802 # 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7)
1803 # Exact date unknown
1804 # 2. Oct 1916: switch to Pacific Standard Time (GMT-8)
1805 # Exact date in October unknown; Sunday October 1 is a reasonable guess.
1806 # 3. June 1918: switch to Pacific Daylight Time (GMT-7)
1807 # Exact date in June unknown; Sunday June 2 is a reasonable guess.
1808 # note 1:
1809 # On Oct 27/1918 when daylight saving ended in the rest of Canada,
1810 # Creston did not change its clocks.
1811 # note 2:
1812 # During WWII when the Federal Government legislated a mandatory clock change,
1813 # Creston did not oblige.
1814 # note 3:
1815 # There is no guarantee that Creston will remain on Mountain Standard Time
1816 # (UTC-7) forever.
1817 # The subject was debated at least once this year by the town Council.
1818 # http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html
1819
1820 # During a period WWII, summer time (Daylight saying) was mandatory in Canada.
1821 # In Creston, that was handled by shifting the area to PST (-8:00) then applying
1822 # summer time to cause the offset to be -7:00, the same as it had been before
1823 # the change. It can be argued that the timezone abbreviation during this
1824 # period should be PDT rather than MST, but that doesn't seem important enough
1825 # (to anyone) to further complicate the rules.
1826
1827 # The transition dates (and times) are guesses.
1828
1829 # From Matt Johnson (2015-09-21):
1830 # Fort Nelson, BC, Canada will cancel DST this year. So while previously they
1831 # were aligned with America/Vancouver, they're now aligned with
1832 # America/Dawson_Creek.
1833 # http://www.northernrockies.ca/EN/meta/news/archives/2015/northern-rockies-time-change.html
1834 #
1835 # From Tim Parenti (2015-09-23):
1836 # This requires a new zone for the Northern Rockies Regional Municipality,
1837 # America/Fort_Nelson. The resolution of 2014-12-08 was reached following a
1838 # 2014-11-15 poll with nearly 75% support. Effectively, the municipality has
1839 # been on MST (-0700) like Dawson Creek since it advanced its clocks on
1840 # 2015-03-08.
1841 #
1842 # From Paul Eggert (2015-09-23):
1843 # Shanks says Fort Nelson did not observe DST in 1946, unlike Vancouver.
1844
1845 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1846 Rule Vanc 1918 only - Apr 14 2:00 1:00 D
1847 Rule Vanc 1918 only - Oct 27 2:00 0 S
1848 Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War
1849 Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace
1850 Rule Vanc 1945 only - Sep 30 2:00 0 S
1851 Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D
1852 Rule Vanc 1946 only - Oct 13 2:00 0 S
1853 Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S
1854 Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S
1855 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1856 Zone America/Vancouver -8:12:28 - LMT 1884
1857 -8:00 Vanc P%sT 1987
1858 -8:00 Canada P%sT
1859 Zone America/Dawson_Creek -8:00:56 - LMT 1884
1860 -8:00 Canada P%sT 1947
1861 -8:00 Vanc P%sT 1972 Aug 30 2:00
1862 -7:00 - MST
1863 Zone America/Fort_Nelson -8:10:47 - LMT 1884
1864 -8:00 Vanc P%sT 1946
1865 -8:00 - PST 1947
1866 -8:00 Vanc P%sT 1987
1867 -8:00 Canada P%sT 2015 Mar 8 2:00
1868 -7:00 - MST
1869 Zone America/Creston -7:46:04 - LMT 1884
1870 -7:00 - MST 1916 Oct 1
1871 -8:00 - PST 1918 Jun 2
1872 -7:00 - MST
1873
1874 # Northwest Territories, Nunavut, Yukon
1875
1876 # From Paul Eggert (2006-03-22):
1877 # Dawson switched to PST in 1973. Inuvik switched to MST in 1979.
1878 # Mathew Englander (1996-10-07) gives the following refs:
1879 # * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,
1880 # c. 7 defines Yukon standard time as UTC-9....
1881 # see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1).
1882 # [http://canlii.ca/t/7vhg]
1883 # * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00.
1884 # * O.I.C. 1980/02 established DST.
1885 # * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00.
1886
1887 # From Brian Inglis (2015-04-14):
1888 #
1889 # I tried to trace the history of Yukon time and found the following
1890 # regulations, giving the reference title and URL if found, regulation name,
1891 # and relevant quote if available. Each regulation specifically revokes its
1892 # predecessor. The final reference is to the current Interpretation Act
1893 # authorizing and resulting from these regulatory changes.
1894 #
1895 # Only recent regulations were retrievable via Yukon government site search or
1896 # index, and only some via Canadian legal sources. Other sources used include
1897 # articles titled "Standard Time and Time Zones in Canada" from JRASC via ADS
1898 # Abstracts, cited by ADO for 1932 ..., and updated versions from 1958 and
1899 # 1970 quoted below; each article includes current extracts from provincial
1900 # and territorial ST and DST regulations at the end, summaries and details of
1901 # standard times and daylight saving time at many locations across Canada,
1902 # with time zone maps, tables and calculations for Canadian Sunrise, Sunset,
1903 # and LMST; they also cover many countries and global locations, with a chart
1904 # and table showing current Universal Time offsets, and may be useful as
1905 # another source of information for 1970 and earlier.
1906 #
1907 # * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26,
1908 # pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS)
1909 # http://adsabs.harvard.edu/abs/1932JRASC..26...49S from p.75:
1910 # Yukon Interpretation Ordinance
1911 # Yukon standard time is the local mean time at the one hundred and
1912 # thirty-fifth meridian.
1913 #
1914 # * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.;
1915 # JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System
1916 # (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1:
1917 # Yukon Interpretation Ordinance, 1955, Chap. 16.
1918 #
1919 # (1) Subject to this section, standard time shall be reckoned as nine
1920 # hours behind Greenwich Time and called Yukon Standard Time.
1921 #
1922 # (2) Notwithstanding subsection (1), the Commissioner may make regulations
1923 # varying the manner of reckoning standard time.
1924 #
1925 # * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance
1926 # http://? - no online source found
1927 #
1928 # * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC,
1929 # Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS)
1930 # http://adsabs.harvard.edu/abs/1970JRASC..64..129T from p.156: Yukon
1931 # Territory Commissioner's Order 1967-59 Interpretation Ordinance ...
1932 #
1933 # 1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon
1934 # Territory on 27th January, 1966, is hereby revoked.
1935 #
1936 # 2. Yukon (East) Standard Time as defined by section 36 of the
1937 # Interpretation Ordinance from and after mid-night on the 28th day of May,
1938 # 1967 shall be reckoned in the same manner as Pacific Standard Time, that
1939 # is to say, eight hours behind Greenwich Time in the area of the Yukon
1940 # Territory lying east of the 138th degree longitude west.
1941 #
1942 # 3. In the remainder of the Territory, lying west of the 138th degree
1943 # longitude west, Yukon (West) Standard Time shall be reckoned as nine
1944 # hours behind Greenwich Time.
1945 #
1946 # * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214
1947 # http://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html
1948 # C.O. 1973/214 INTERPRETATION ACT ...
1949 #
1950 # 1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby
1951 # revoked.
1952 #
1953 # 2. Yukon Standard Time as defined by section 36 of the Interpretation
1954 # Act from and after midnight on the twenty-eighth day of October, 1973
1955 # shall be reckoned in the same manner as Pacific Standard Time, that is
1956 # to say eight hours behind Greenwich Time.
1957 #
1958 # * O.I.C. 1980/02 INTERPRETATION ACT
1959 # http://? - no online source found
1960 #
1961 # * Yukon Daylight Saving Time, YOIC 1987/56
1962 # http://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html
1963 # O.I.C. 1987/056 INTERPRETATION ACT ...
1964 #
1965 # In every year between
1966 # (a) two o'clock in the morning in the first Sunday in April, and
1967 # (b) two o'clock in the morning in the last Sunday in October,
1968 # Standard Time shall be reckoned as seven hours behind Greenwich Time and
1969 # called Yukon Daylight Saving Time.
1970 # ...
1971 # Dated ... 9th day of March, A.D., 1987.
1972 #
1973 # * Yukon Daylight Saving Time 2006, YOIC 2006/127
1974 # http://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html
1975 # O.I.C. 2006/127 INTERPRETATION ACT ...
1976 #
1977 # 1. In Yukon each year the time for general purposes shall be 7 hours
1978 # behind Greenwich mean time during the period commencing at two o'clock
1979 # in the forenoon on the second Sunday of March and ending at two o'clock
1980 # in the forenoon on the first Sunday of November and shall be called
1981 # Yukon Daylight Saving Time.
1982 #
1983 # 2. Order-in-Council 1987/56 is revoked.
1984 #
1985 # 3. This order comes into force January 1, 2007.
1986 #
1987 # * Interpretation Act, RSY 2002, c 125
1988 # http://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html
1989
1990 # From Rives McDow (1999-09-04):
1991 # Nunavut ... moved ... to incorporate the whole territory into one time zone.
1992 # Nunavut moves to single time zone Oct. 31
1993 # http://www.nunatsiaq.com/nunavut/nvt90903_13.html
1994 #
1995 # From Antoine Leca (1999-09-06):
1996 # We then need to create a new timezone for the Kitikmeot region of Nunavut
1997 # to differentiate it from the Yellowknife region.
1998
1999 # From Paul Eggert (1999-09-20):
2000 # Basic Facts: The New Territory
2001 # http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html
2002 # (1999) reports that Pangnirtung operates on eastern time,
2003 # and that Coral Harbour does not observe DST. We don't know when
2004 # Pangnirtung switched to eastern time; we'll guess 1995.
2005
2006 # From Rives McDow (1999-11-08):
2007 # On October 31, when the rest of Nunavut went to Central time,
2008 # Pangnirtung wobbled. Here is the result of their wobble:
2009 #
2194 # aka Kangiqiniq
2195 Zone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded
2196 -6:00 NT_YK C%sT 2000 Oct 29 2:00
2197 -5:00 - EST 2001 Apr 1 3:00
2198 -6:00 Canada C%sT
2199 # aka Iqaluktuuttiaq
2200 Zone America/Cambridge_Bay 0 - zzz 1920 # trading post est.?
2201 -7:00 NT_YK M%sT 1999 Oct 31 2:00
2202 -6:00 Canada C%sT 2000 Oct 29 2:00
2203 -5:00 - EST 2000 Nov 5 0:00
2204 -6:00 - CST 2001 Apr 1 3:00
2205 -7:00 Canada M%sT
2206 Zone America/Yellowknife 0 - zzz 1935 # Yellowknife founded?
2207 -7:00 NT_YK M%sT 1980
2208 -7:00 Canada M%sT
2209 Zone America/Inuvik 0 - zzz 1953 # Inuvik founded
2210 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00
2211 -7:00 NT_YK M%sT 1980
2212 -7:00 Canada M%sT
2213 Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20
2214 -9:00 NT_YK Y%sT 1967 May 28 0:00
2215 -8:00 NT_YK P%sT 1980
2216 -8:00 Canada P%sT
2217 Zone America/Dawson -9:17:40 - LMT 1900 Aug 20
2218 -9:00 NT_YK Y%sT 1973 Oct 28 0:00
2219 -8:00 NT_YK P%sT 1980
2220 -8:00 Canada P%sT
2221
2222
2223 ###############################################################################
2224
2225 # Mexico
2226
2227 # From Paul Eggert (2014-12-07):
2228 # The Investigation and Analysis Service of the
2229 # Mexican Library of Congress (MLoC) has published a
2230 # history of Mexican local time (in Spanish)
2231 # http://www.diputados.gob.mx/bibliot/publica/inveyana/polisoc/horver/index.htm
2232 #
2233 # Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC.
2234 # (In all cases we go with the MLoC.)
2395 # kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el
2396 # interior del país, la aplicación de este horario estacional surtirá
2397 # efecto desde las dos horas del segundo domingo de marzo y concluirá a
2398 # las dos horas del primer domingo de noviembre.
2399
2400 # From Steffen Thorsen (2014-12-08), translated by Gwillim Law:
2401 # The Mexican state of Quintana Roo will likely change to EST in 2015.
2402 #
2403 # http://www.unioncancun.mx/articulo/2014/12/04/medio-ambiente/congreso-aprueba-una-hora-mas-de-sol-en-qroo
2404 # "With this change, the time conflict that has existed between the municipios
2405 # of Quintana Roo and the municipio of Felipe Carrillo Puerto may come to an
2406 # end. The latter declared itself in rebellion 15 years ago when a time change
2407 # was initiated in Mexico, and since then it has refused to change its time
2408 # zone along with the rest of the country."
2409 #
2410 # From Steffen Thorsen (2015-01-14), translated by Gwillim Law:
2411 # http://sipse.com/novedades/confirman-aplicacion-de-nueva-zona-horaria-para-quintana-roo-132331.html
2412 # "...the new time zone will come into effect at two o'clock on the first Sunday
2413 # of February, when we will have to advance the clock one hour from its current
2414 # time..."
2415 # Also, the new zone will not use DST.
2416 #
2417 # From Carlos Raúl Perasso (2015-02-02):
2418 # The decree that modifies the Mexican Hour System Law has finally
2419 # been published at the Diario Oficial de la Federación
2420 # http://www.dof.gob.mx/nota_detalle.php?codigo=5380123&fecha=31/01/2015
2421 # It establishes 5 zones for Mexico:
2422 # 1- Zona Centro (Central Zone): Corresponds to longitude 90 W,
2423 # includes most of Mexico, excluding what's mentioned below.
2424 # 2- Zona Pacífico (Pacific Zone): Longitude 105 W, includes the
2425 # states of Baja California Sur; Chihuahua; Nayarit (excluding Bahía
2426 # de Banderas which lies in Central Zone); Sinaloa and Sonora.
2427 # 3- Zona Noroeste (Northwest Zone): Longitude 120 W, includes the
2428 # state of Baja California.
2429 # 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state
2430 # of Quintana Roo.
2431 # 5- The islands, reefs and keys shall take their timezone from the
2432 # longitude they are located at.
2433
2434 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2435 Rule Mexico 1939 only - Feb 5 0:00 1:00 D
2436 Rule Mexico 1939 only - Jun 25 0:00 0 S
2437 Rule Mexico 1940 only - Dec 9 0:00 1:00 D
2438 Rule Mexico 1941 only - Apr 1 0:00 0 S
2439 Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War
2440 Rule Mexico 1944 only - May 1 0:00 0 S
2441 Rule Mexico 1950 only - Feb 12 0:00 1:00 D
2442 Rule Mexico 1950 only - Jul 30 0:00 0 S
2443 Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D
2444 Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S
2445 Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D
2446 Rule Mexico 2001 only - Sep lastSun 2:00 0 S
2447 Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D
2448 Rule Mexico 2002 max - Oct lastSun 2:00 0 S
2449 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2450 # Quintana Roo; represented by Cancún
2451 Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56
2452 -6:00 - CST 1981 Dec 23
2607 -8:00 US P%sT 2002 Feb 20
2608 -8:00 Mexico P%sT
2609 # From Paul Eggert (2006-03-22):
2610 # Formerly there was an America/Ensenada zone, which differed from
2611 # America/Tijuana only in that it did not observe DST from 1976
2612 # through 1995. This was as per Shanks (1999). But Shanks & Pottenger say
2613 # Ensenada did not observe DST from 1948 through 1975. Guy Harris reports
2614 # that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and
2615 # Tijuana observe DST," which agrees with Shanks & Pottenger but implies that
2616 # DST-observance was a town-by-town matter back then. This concerns
2617 # data after 1970 so most likely there should be at least one Zone
2618 # other than America/Tijuana for Baja, but it's not clear yet what its
2619 # name or contents should be.
2620 #
2621 # Revillagigedo Is
2622 # no information
2623
2624 ###############################################################################
2625
2626 # Anguilla
2627 # Antigua and Barbuda
2628 # See America/Port_of_Spain.
2629
2630 # Bahamas
2631 #
2632 # For 1899 Milne gives -5:09:29.5; round that.
2633 #
2634 # From Sue Williams (2006-12-07):
2635 # The Bahamas announced about a month ago that they plan to change their DST
2636 # rules to sync with the U.S. starting in 2007....
2637 # http://www.jonesbahamas.com/?c=45&a=10412
2638
2639 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2640 Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S
2641 Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D
2642 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2643 Zone America/Nassau -5:09:30 - LMT 1912 Mar 2
2644 -5:00 Bahamas E%sT 1976
2645 -5:00 US E%sT
2646
2647 # Barbados
2648
2649 # For 1899 Milne gives -3:58:29.2; round that.
2675 # Bermuda
2676
2677 # For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower,
2678 # Bermuda dockyard, Ireland I; round that.
2679
2680 # From Dan Jones, reporting in The Royal Gazette (2006-06-26):
2681
2682 # Next year, however, clocks in the US will go forward on the second Sunday
2683 # in March, until the first Sunday in November. And, after the Time Zone
2684 # (Seasonal Variation) Bill 2006 was passed in the House of Assembly on
2685 # Friday, the same thing will happen in Bermuda.
2686 # http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135
2687
2688 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2689 Zone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton
2690 -4:00 - AST 1974 Apr 28 2:00
2691 -4:00 Canada A%sT 1976
2692 -4:00 US A%sT
2693
2694 # Cayman Is
2695
2696 # From Paul Eggert (2015-05-15):
2697 # The Cayman government has decided to introduce DST in 2016, the idea being
2698 # to keep in sync with New York. The legislation hasn't passed but the change
2699 # seems quite likely. See: Meade B. Cayman 27.
2700 # http://www.cayman27.com.ky/2015/05/15/clock-ticks-toward-daylight-saving-time-in-cayman
2701
2702 Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown
2703 -5:07:11 - KMT 1912 Feb # Kingston Mean Time
2704 -5:00 - EST 2016
2705 -5:00 US E%sT
2706
2707 # Costa Rica
2708
2709 # Milne gives -5:36:13.3 as San José mean time; round to nearest.
2710
2711 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
2712 Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D
2713 Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S
2714 Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D
2715 # IATA SSIM (1991-09) says the following was at 1:00;
2716 # go with Shanks & Pottenger.
2717 Rule CR 1991 only - Jul 1 0:00 0 S
2718 Rule CR 1992 only - Mar 15 0:00 0 S
2719 # There are too many San Josés elsewhere, so we'll use 'Costa Rica'.
2720 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
2721 Zone America/Costa_Rica -5:36:13 - LMT 1890 # San José
2722 -5:36:13 - SJMT 1921 Jan 15 # San José Mean Time
2723 -6:00 CR C%sT
2724 # Coco
2725 # no information; probably like America/Costa_Rica
|