Here are proposed changes to the tz database, taken from the following: * I went through Shanks to find all unique timezone histories in Canada since 1970; one (America/Dawson_Creek) is unique in Canada even today. * An anonymous tz contributor showed that `IST' is the correct name for summer time in Dublin. * While proofreading the above correction I found some other bugs for Britain and Ireland in 1968 and 1971, which Peter Ilieve kindly verified. * New comments about the noted DST innovator Benjamin Franklin; about a couple of time zone mysteries associated with Watson Lake, Yukon, and Liverpool, Nova Scotia; and about a few other subjects. Comments (particularly from Canadian readers) are welcome. Here is a more detailed log of the proposed changes: europe data: In Dublin use `IST' instead of `BST' (since 1921-12-06). London's 1971-10-31 transition was at 03:00, not 02:00. Set isdst=1 in Belfast, Dublin, and London from 1968-02-18 to 1968-10-27. northamerica data: Create the zone America/Dawson_Creek, which observes MST all year. Northwest Territories and Yukon did not observe DST from 1966 through 1979, so create zones for Inuvik, Iqaluit, Pangnirtung, Rankin_Inlet, Yellowknife. Create the zones America/Nipigon and America/Rainy_River for EST and CST locales that did not observe DST in 1970-1973. Create the zone America/Thunder_Bay, which skipped DST in 1973. Create the zone America/Dawson, which switched from YST to PST in 1973. Create the zone America/Swift_Current for west Saskatechewan towns that switched from MST/MDT to CST in 1972. Create zone America/Glace_Bay for AST locales that did not use DST in 1970-1971. Regina observed CST (not MDT) between 1960 and 1966. Whitehorse's 1966-07-01 transition was at 02:00 (not 00:00). Northwest Territories and Yukon observed double DST in 1965. In 1959, Regina switched from MDT to MST on 10-25, not 09-27. Whitehorse switched from YDT to YST on 1945-09-30 (this transition was missing). comments: Add comments about noted DST innovators B Franklin and W Willett, plus an acerbic quote about DST by R Davies. Remove old vague or misleading comments about Canadian rules. Move comments about Canadian provinces closer to the tables that they describe, and add a header for each major table. Touch up comments about Italy. Add a source for this year's changes to Mexico's rules. Here is the proposed patch: =================================================================== RCS file: RCS/europe,v retrieving revision 1996.8 retrieving revision 1996.8.1.1 diff -c -r1996.8 -r1996.8.1.1 *** europe 1996/05/09 21:40:46 1996.8 --- europe 1996/06/13 05:39:38 1996.8.1.1 *************** *** 125,130 **** --- 125,139 ---- # transition date for London, namely 1847 Sep 22. We don't know as much # about Dublin, so we use 1880 Aug 2, the legal transition time. + # From Paul Eggert (1996-06-12): + # Summer Time was first seriously proposed by William Willett (1857-1915), + # a London builder who circulated a pamphlet ``Waste of Daylight'' (1907) + # that proposed advancing clocks 20 minutes on each of four Sundays in April, + # and retarding them by the same amount on four Sundays in September. + # A bill was drafted in 1909 and introduced in Parliament several times, + # but it met with ridicule and opposition, especially from farming interests. + # One-hour Summer Time was eventually adopted as a wartime measure in 1916. + # From Arthur David Olson (January 19, 1989): # # A source at the British Information Office in New York avers that it's *************** *** 418,423 **** --- 427,448 ---- # who provided the wartime regulations and a snippet of Hansard explaining # why double summer time started on a Monday in 1945 (it was Easter). + # From Peter Ilieve <peter@aldie.co.uk> (1996-05-29): + # I have now got a copy of the British Standard Time Act 1968. + # It says (S4(2)) that it expires at 02:00 GMT on 31 October 1971 unless + # an Order in Council was passed in Parliament to make the Act permanent. + # No Order was passed, so 02:00 1971-10-31 it is... + # + # Interestingly, it says baldly `This Act shall come into force on + # 27 October 1968', without giving a time. As S1 of the Act merely + # stated that `The time for general purposes in the United Kingdom + # (to be known as British standard time) shall be one hour in + # advance of Greenwich mean time throughout the year; ...' you could + # possibly argue that the start time of BStandardT was 00:00 1968-10-27, + # especially as the Act repealed the Summer Time Acts 1916--1947 in toto, + # thereby destroying the authority of the Summer Time Order specifying + # summer time in 1968.... + # From Peter Ilieve <peter@memex.co.uk> (November 18, 1993) # # Here is a revised version of my tabrules file for the perl script I sent *************** *** 617,623 **** # To maintain strict historical accuracy you could start a new UK ending rule # of Oct Sun>=22 in 1990. ! # From Paul Eggert <eggert@twinsun.com> (November 18, 1993): # # As Ilieve remarks, the date `20 April 1924' in the table of ``Summer Time: A # Consultation Document'' (Cm 722, 1989) table is a transcription error; --- 642,648 ---- # To maintain strict historical accuracy you could start a new UK ending rule # of Oct Sun>=22 in 1990. ! # From Paul Eggert <eggert@twinsun.com> (1996-06-12): # # As Ilieve remarks, the date `20 April 1924' in the table of ``Summer Time: A # Consultation Document'' (Cm 722, 1989) table is a transcription error; *************** *** 637,651 **** # It actually just had one transition. # * Northern Ireland used single daylight savings time throughout WW II. # Actually, it conformed to Britain. # ! # The following claim by Shanks is possible though doubtful; ! # we'll ignore it for now. # * Jersey, Guernsey, and the Isle of Man did not switch from GMT # to daylight savings time until 1921 Apr 3, when they began to # conform with Great Britain. # # Whitman says Dublin Mean Time was -0:25:21, which is more precise than Shanks. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S # 1916 to 1925--irregular Rule GB-Eire 1916 only - May 21 2:00s 1:00 BST --- 662,689 ---- # It actually just had one transition. # * Northern Ireland used single daylight savings time throughout WW II. # Actually, it conformed to Britain. + # * GB-Eire changed standard time to 1 hour ahead of GMT on 1968-02-18. + # Actually, that date saw the usual switch to summer time. + # Standard time was not changed until 1968-10-27 (the clocks didn't change). # ! # The following claims by Shanks are possible though doubtful; ! # we'll ignore them for now. # * Jersey, Guernsey, and the Isle of Man did not switch from GMT # to daylight savings time until 1921 Apr 3, when they began to # conform with Great Britain. + # * Dublin's 1971-10-31 switch was at 02:00, even though London's was 03:00. + # # # Whitman says Dublin Mean Time was -0:25:21, which is more precise than Shanks. + # From an anonymous contributor (1996-06-02): + # The law governing time in Ireland is under Statutory Instrument SI 395/94, + # which gives force to European Union 7th Council Directive # 94/21/EC. + # Under this directive, the Minister for Justice in Ireland makes appropriate + # regulations. I spoke this morning with the Secretary of the Department of + # Justice (tel +353 1 678 9711) who confirmed to me that the correct name is + # "Irish Summer Time", abbreviated to "IST". + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S # 1916 to 1925--irregular Rule GB-Eire 1916 only - May 21 2:00s 1:00 BST *************** *** 710,720 **** Rule GB-Eire 1960 only - Apr 10 2:00s 1:00 BST Rule GB-Eire 1961 1963 - Mar lastSun 2:00s 1:00 BST Rule GB-Eire 1964 1967 - Mar Sun>=19 2:00s 1:00 BST Rule GB-Eire 1972 1980 - Mar Sun>=16 2:00s 1:00 BST # 1953 to 1980, ending rules Rule GB-Eire 1953 1960 - Oct Sun>=1 2:00s 0 GMT ! Rule GB-Eire 1961 1967 - Oct Sun>=23 2:00s 0 GMT ! Rule GB-Eire 1971 only - Oct 31 3:00 0 GMT Rule GB-Eire 1972 1980 - Oct Sun>=23 2:00s 0 GMT # 1981 on Rule GB-Eire 1981 1995 - Mar lastSun 1:00u 1:00 BST --- 748,758 ---- Rule GB-Eire 1960 only - Apr 10 2:00s 1:00 BST Rule GB-Eire 1961 1963 - Mar lastSun 2:00s 1:00 BST Rule GB-Eire 1964 1967 - Mar Sun>=19 2:00s 1:00 BST + Rule GB-Eire 1968 only - Feb 18 2:00s 1:00 BST Rule GB-Eire 1972 1980 - Mar Sun>=16 2:00s 1:00 BST # 1953 to 1980, ending rules Rule GB-Eire 1953 1960 - Oct Sun>=1 2:00s 0 GMT ! Rule GB-Eire 1961 1968 - Oct Sun>=23 2:00s 0 GMT Rule GB-Eire 1972 1980 - Oct Sun>=23 2:00s 0 GMT # 1981 on Rule GB-Eire 1981 1995 - Mar lastSun 1:00u 1:00 BST *************** *** 724,752 **** # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Europe/London -0:01:15 - LMT 1847 Sep 22 ! 0:00 GB-Eire %s 1968 Feb 18 2:00 ! 1:00 - BST 1971 Oct 31 2:00 0:00 GB-Eire %s 1996 0:00 EU GMT/BST Zone Europe/Belfast -0:23:40 - LMT 1880 Aug 2 -0:25:21 - DMT 1916 May 21 2:00 # Dublin MT -0:25:21 1:00 DST 1916 Oct 1 3:00 ! 0:00 GB-Eire %s 1968 Feb 18 2:00 ! 1:00 - BST 1971 Oct 31 3:00 0:00 GB-Eire %s 1996 0:00 EU GMT/BST Zone Europe/Dublin -0:25:21 - LMT 1880 Aug 2 -0:25:21 - DMT 1916 May 21 2:00 # Dublin MT -0:25:21 1:00 DST 1916 Oct 1 3:00 ! 0:00 GB-Eire %s 1940 Feb 25 2:00 ! 0:00 1:00 BST 1946 Oct 6 2:00 0:00 - GMT 1947 Mar 16 2:00 ! 0:00 1:00 BST 1947 Nov 2 2:00 0:00 - GMT 1948 Apr 18 2:00 ! 0:00 GB-Eire %s 1968 Feb 18 2:00 ! 1:00 - BST 1971 Oct 31 3:00 ! 0:00 GB-Eire %s 1996 ! 0:00 EU GMT/BST ############################################################################### --- 762,791 ---- # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Europe/London -0:01:15 - LMT 1847 Sep 22 ! 0:00 GB-Eire %s 1968 Oct 27 ! 1:00 - BST 1971 Oct 31 2:00u 0:00 GB-Eire %s 1996 0:00 EU GMT/BST Zone Europe/Belfast -0:23:40 - LMT 1880 Aug 2 -0:25:21 - DMT 1916 May 21 2:00 # Dublin MT -0:25:21 1:00 DST 1916 Oct 1 3:00 ! 0:00 GB-Eire %s 1968 Oct 27 ! 1:00 - BST 1971 Oct 31 2:00u 0:00 GB-Eire %s 1996 0:00 EU GMT/BST Zone Europe/Dublin -0:25:21 - LMT 1880 Aug 2 -0:25:21 - DMT 1916 May 21 2:00 # Dublin MT -0:25:21 1:00 DST 1916 Oct 1 3:00 ! 0:00 GB-Eire %s 1921 Dec 6 ! 0:00 GB-Eire GMT/IST 1940 Feb 25 2:00 ! 0:00 1:00 IST 1946 Oct 6 2:00 0:00 - GMT 1947 Mar 16 2:00 ! 0:00 1:00 IST 1947 Nov 2 2:00 0:00 - GMT 1948 Apr 18 2:00 ! 0:00 GB-Eire GMT/IST 1968 Oct 27 ! 1:00 - IST 1971 Oct 31 2:00u ! 0:00 GB-Eire GMT/IST 1996 ! 0:00 EU GMT/IST ############################################################################### *************** *** 1294,1304 **** # Italy # From Paul Eggert (1996-05-06): # For Italian DST we have three sources: Shanks, Whitman, and F. Pollastri ! # <http://pisolo.cstv.to.cnr.it/toi/it/ienitlt.html> (see `FP' below), # taken from a publication of the Italian National Electrotechnical Institute. # When the three sources disagree, guess who's right, as follows: # ! # year FP Shanks (S) Whitman (W) Go with: # 1916 06-03 06-03 24:00 06-03 00:00 FP & W # 09-30 09-30 24:00 09-30 01:00 FP; guess 24:00s # 1917 04-01 03-31 24:00 03-31 00:00 FP & S --- 1333,1343 ---- # Italy # From Paul Eggert (1996-05-06): # For Italian DST we have three sources: Shanks, Whitman, and F. Pollastri ! # <URL:http://pisolo.cstv.to.cnr.it/toi/uk/ienitlt.html> (see `FP' below), # taken from a publication of the Italian National Electrotechnical Institute. # When the three sources disagree, guess who's right, as follows: # ! # year FP Shanks (S) Whitman (W) Go with: # 1916 06-03 06-03 24:00 06-03 00:00 FP & W # 09-30 09-30 24:00 09-30 01:00 FP; guess 24:00s # 1917 04-01 03-31 24:00 03-31 00:00 FP & S =================================================================== RCS file: RCS/northamerica,v retrieving revision 1996.7 retrieving revision 1996.7.1.1 diff -c -r1996.7 -r1996.7.1.1 *** northamerica 1996/05/03 02:49:59 1996.7 --- northamerica 1996/06/13 05:39:38 1996.7.1.1 *************** *** 21,26 **** --- 21,44 ---- # Make sure you have the errata sheet; the book is somewhat useless without it. # It is the source for the US and Puerto Rico entries below. + # From Paul Eggert (1996-06-12): + # Daylight Saving Time was first suggested as a joke by Benjamin Franklin + # in his whimsical essay ``Turkey vs Eagle, McCauley is my Beagle'' (1784). + # Not everyone is happy with the results: + # + # I don't really care how time is reckoned so long as there is some + # agreement about it, but I object to being told that I am saving + # daylight when my reason tells me that I am doing nothing of the kind. + # I even object to the implication that I am wasting something + # valuable if I stay in bed after the sun has risen. As an admirer + # of moonlight I resent the bossy insistence of those who want to + # reduce my time for enjoying it. At the back of the Daylight Saving + # scheme I detect the bony, blue-fingered hand of Puritanism, eager + # to push people into bed earlier, and get them up earlier, to make + # them healthy, wealthy and wise in spite of themselves. + # + # -- Robertson Davies, The Diary of Samuel Marchbanks (1947), XIX, Sunday + # From Arthur David Olson: # US Daylight Saving Time ended on the last Sunday of *October* in 1974. # See, for example, the front page of the Saturday, October 26, 1974 *************** *** 463,540 **** # Canada - # Canada is reportedly lots easier than the US--leastways since 1951. - # I don't know what they did before then. - # 4.3BSD claims that it's perfectly regular. - # According to a posting in "comp.bugs.misc", "comp.unix.wizards", etc. - # on February 8, 1987, by Dave Sherman of the Law Society of Upper Canada, - # "...Canada (well, Ontario and at least some of the other provinces) are - # adopting the new daylight savings time rules...". We assume all of - # Canada is doing so. - - # From Bob Devine (January 28, 1988): - # All of Canada did have DST from your first rule except Saskatchewan. - # Which parts did not observe DST is hard to pinpoint but most of the - # province follows the rules. - # NOTE: those that didn't have DST for that rule, also - # probably did not have it for several years previous. - - # From U. S. Naval Observatory (January 19, 1989): - # CANADA NEW FDL 3.5H BEHIND UTC ST.JOHN'S - # CANADA NEW FDL 1.5H BEHIND UTC APR 3 - OCT 29 - # CANADA ATLANTIC 4 H BEHIND UTC HALIFAX - # CANADA ATLANTIC 3 H BEHIND UTC APR 3 - OCT 29 - # CANADA EASTERN 5 H BEHIND UTC TORONTO, MONTREAL, OTTAWA - # CANADA EASTERN 4 H BEHIND UTC APR 3 - OCT 29 - # CANADA CENTRAL 6 H BEHIND UTC REGINA, WINNIPEG - # CANADA CENTRAL 5 H BEHIND UTC APR 3 - OCT 29 - # CANADA MOUNTAIN 7 H BEHIND UTC CALGARY, EDMONTON - # CANADA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 29 - # CANADA PACIFIC 8 H BEHIND UTC VANCOUVER - # CANADA PACIFIC 7 H BEHIND UTC APR 3 - OCT 29 - # CANADA YUKON SAME AS PACIFIC DAWSON - - # From Arthur David Olson (January 21, 1989): - # April 3 fell on a Sunday in 1988; October 29 fell on a Sunday in 1989. Ahem. - # Note claim that there's double DST in Newfoundland and that Yukon should - # be same as Pacific. - - # From W. Jones (jones@skdad.usask.ca) (November 6, 1992): - # The. . .below is based on information I got from our law library, the - # provincial archives, and the provincial Community Services department. - # A precise history would require digging through newspaper archives, and - # since you didn't say what you wanted, I didn't bother. - # - # Saskatchewan is split by a time zone meridian (105W) and over the years - # the boundary became pretty ragged as communities near it reevaluated - # their affiliations in one direction or the other. In 1965 a provincial - # referendum favoured legislating common time practices. - # - # On 15 April 1966 the Time Act (c. T-14, Revised Statutes of - # Saskatchewan 1978) was proclaimed, and established that the eastern - # part of Saskatchewan would use CST year round, that districts in - # northwest Saskatchewan would by default follow CST but could opt to - # follow Mountain Time rules (thus 1 hour difference in the winter and - # zero in the summer), and that districts in southwest Saskatchewan would - # by default follow MT but could opt to follow CST. - # - # It took a few years for the dust to settle (I know one story of a town - # on one time zone having its school in another, such that a mom had to - # serve her family lunch in two shifts), but presently it seems that only - # a few towns on the border with Alberta (e.g. Lloydminster) follow MT - # rules any more; all other districts appear to have used CST year round - # since sometime in the 1960s. - # - # Here's how I would summarize things. Establish a "Saskatchewan" CST - # time zone, and note that it officially exists as of 15 April 1966. Any - # current exceptions can put themselves in the "Mountain" zone, since - # those are the rules they follow. Any past exceptions can be forgotten, - # since that's what those who live here have done. - - # From Arthur David Olson (November 21, 1992): - # East-Saskatchewan kept to avoid problems for folks using that zone by name; - # plain Saskatchewan added. - # From Alain LaBont<e'> <ALB@immedia.ca> (1994-11-14): # I post here the time zone abbreviations standardized in Canada # for both English and French in the CAN/CSA-Z234.4-89 standard.... --- 481,486 ---- *************** *** 567,573 **** # From Paul Eggert <eggert@twinsun.com> (1994-11-22): # Alas, this sort of thing must be handled by localization software. ! # From Shanks (1991): # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule StJohns 1917 1918 - Apr Sun>=8 2:00 1:00 D Rule StJohns 1917 only - Sep 17 2:00 0 S --- 513,533 ---- # From Paul Eggert <eggert@twinsun.com> (1994-11-22): # Alas, this sort of thing must be handled by localization software. ! # The data for Canada are all from Shanks (1991). ! ! ! # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S ! Rule Canada 1918 only - Apr 14 2:00 1:00 D ! Rule Canada 1918 only - Oct 31 2:00 0 S ! Rule Canada 1942 only - Feb 9 2:00 1:00 D ! Rule Canada 1945 only - Sep 30 2:00 0 S ! Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D ! Rule Canada 1974 max - Oct lastSun 2:00 0 S ! Rule Canada 1987 max - Apr Sun>=1 2:00 1:00 D ! ! ! # Newfoundland ! # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule StJohns 1917 1918 - Apr Sun>=8 2:00 1:00 D Rule StJohns 1917 only - Sep 17 2:00 0 S *************** *** 606,611 **** --- 566,581 ---- -3:31 StJohns N%sT 1935 Mar 30 -3:30 StJohns N%sT + + # Labrador, New Brunswick, Nova Scotia, Prince Edward I + + # From Paul Eggert (1996-06-12): + # Shanks writes that since 1970 most of this region has been like Halifax. + # Many locales did not observe peacetime DST until 1972; + # Glace Bay, NS is the largest that we know of. + # Shanks also writes that Liverpool, NS was the only town in Canada to observe + # DST in 1971 but not 1970; for now we'll assume this is a typo. + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Halifax 1916 only - Apr 1 0:00 1:00 D Rule Halifax 1916 only - Oct 1 0:00 0 S *************** *** 650,655 **** --- 620,640 ---- # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Halifax -4:14:24 - LMT 1902 Jun 15 -4:00 Halifax A%sT + Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 + -4:00 Canada A%sT 1953 + -4:00 Halifax A%sT 1954 + -4:00 - AST 1972 + -4:00 Halifax A%sT + + + # Ontario, Quebec + + # From Paul Eggert (1996-06-12): + # Shanks writes that since 1970 most of this region has been like Montreal. + # Thunder Bay skipped DST in 1973. + # Many smaller locales did not observe peacetime DST until 1974; + # Nipigon (EST) and Rainy River (CST) are the largest that we know of. + # Far west Ontario is like Winnipeg; far east Quebec is like Halifax. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Mont 1917 only - Mar 25 2:00 1:00 D *************** *** 683,688 **** --- 668,685 ---- # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Montreal -4:54:16 - LMT 1884 -5:00 Mont E%sT + Zone America/Thunder_Bay -5:57:00 - LMT 1895 + -5:00 Canada E%sT 1970 + -5:00 Mont E%sT 1973 + -5:00 - EST 1974 + -5:00 Canada E%sT + Zone America/Nipigon -5:53:04 - LMT 1895 + -5:00 Canada E%sT + Zone America/Rainy_River -6:17:56 - LMT 1895 + -6:00 Canada C%sT + + + # Manitoba # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Winn 1916 only - Apr 23 0:00 1:00 D *************** *** 712,717 **** --- 709,748 ---- Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 -6:00 Winn C%sT + + # Saskatchewan + + # From Paul Eggert (1996-06-12): + # Shanks writes that since 1970 most of this region has been like Regina. + # Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. + # Other western towns (e.g. Lloydminster) are like Edmonton. + + # From W. Jones <jones@skdad.usask.ca> (November 6, 1992): + # The. . .below is based on information I got from our law library, the + # provincial archives, and the provincial Community Services department. + # A precise history would require digging through newspaper archives, and + # since you didn't say what you wanted, I didn't bother. + # + # Saskatchewan is split by a time zone meridian (105W) and over the years + # the boundary became pretty ragged as communities near it reevaluated + # their affiliations in one direction or the other. In 1965 a provincial + # referendum favoured legislating common time practices. + # + # On 15 April 1966 the Time Act (c. T-14, Revised Statutes of + # Saskatchewan 1978) was proclaimed, and established that the eastern + # part of Saskatchewan would use CST year round, that districts in + # northwest Saskatchewan would by default follow CST but could opt to + # follow Mountain Time rules (thus 1 hour difference in the winter and + # zero in the summer), and that districts in southwest Saskatchewan would + # by default follow MT but could opt to follow CST. + # + # It took a few years for the dust to settle (I know one story of a town + # on one time zone having its school in another, such that a mom had to + # serve her family lunch in two shifts), but presently it seems that only + # a few towns on the border with Alberta (e.g. Lloydminster) follow MT + # rules any more; all other districts appear to have used CST year round + # since sometime in the 1960s. + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Regina 1918 only - Apr 14 2:00 1:00 D Rule Regina 1918 only - Oct 31 2:00 0 S *************** *** 723,737 **** Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S Rule Regina 1942 only - Feb 9 2:00 1:00 D Rule Regina 1945 only - Sep lastSun 2:00 0 S ! Rule Regina 1946 only - Apr 14 2:00 1:00 D ! Rule Regina 1946 only - Oct 13 2:00 0 S ! Rule Regina 1947 1960 - Apr lastSun 2:00 1:00 D ! Rule Regina 1947 1959 - Sep lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] ! Zone America/Regina -6:58:36 - LMT 1905 Sep ! -7:00 Regina M%sT 1966 Apr 15 -6:00 - CST # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D Rule Edm 1918 only - Oct 31 2:00 0 S --- 754,783 ---- Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S Rule Regina 1942 only - Feb 9 2:00 1:00 D Rule Regina 1945 only - Sep lastSun 2:00 0 S ! Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D ! Rule Regina 1946 only - Oct Sun>=8 2:00 0 S ! Rule Regina 1947 1959 - Apr lastSun 2:00 1:00 D ! Rule Regina 1947 1958 - Sep lastSun 2:00 0 S ! Rule Regina 1959 only - Oct lastSun 2:00 0 S ! # ! Rule Swift 1957 only - Apr lastSun 2:00 1:00 D ! Rule Swift 1957 only - Oct lastSun 2:00 0 S ! Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D ! Rule Swift 1959 only - Oct lastSun 2:00 0 S ! Rule Swift 1960 1961 - Sep lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] ! Zone America/Regina -6:58:36 - LMT 1905 Sep ! -7:00 Regina M%sT 1960 Apr lastSun 2:00 ! -6:00 - CST ! Zone America/Swift_Current -7:11:20 - LMT 1905 Sep ! -7:00 Canada M%sT 1946 Apr lastSun 2:00 ! -7:00 Regina M%sT 1950 ! -7:00 Swift M%sT 1972 Apr lastSun 2:00 -6:00 - CST + + # Alberta + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D Rule Edm 1918 only - Oct 31 2:00 0 S *************** *** 754,759 **** --- 800,812 ---- Zone America/Edmonton -7:33:52 - LMT 1906 Sep -7:00 Edm M%sT + + # British Columbia + + # From Paul Eggert (1996-06-12): + # Shanks writes that since 1970 most of this region has been like Vancouver. + # Dawswon Creek uses MST. Much of east BC is like Edmonton. + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Vanc 1918 only - Apr 14 2:00 1:00 D Rule Vanc 1918 only - Oct 31 2:00 0 S *************** *** 767,789 **** # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Vancouver -8:12:28 - LMT 1884 -8:00 Vanc P%sT # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S ! Rule Yukon 1918 only - Apr 14 2:00 1:00 D ! Rule Yukon 1918 only - Oct 27 2:00 0 S ! Rule Yukon 1919 only - May 25 2:00 1:00 D ! Rule Yukon 1919 only - Nov 1 0:00 0 S ! Rule Yukon 1942 only - Feb 9 2:00 1:00 D ! Rule Yukon 1965 only - Apr 25 0:00 1:00 D ! Rule Yukon 1965 only - Oct 31 2:00 0 S ! Rule Yukon 1980 1986 - Apr lastSun 2:00 1:00 D ! Rule Yukon 1980 max - Oct lastSun 2:00 0 S ! Rule Yukon 1987 max - Apr Sun>=1 2:00 1:00 D ! # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 ! -9:00 Yukon Y%sT 1966 Jul ! -8:00 Yukon P%sT ! # Parts of Yukon (e.g. Dawson) didn't switch to -8:00 until 1973 Oct 28. ############################################################################### --- 820,869 ---- # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Vancouver -8:12:28 - LMT 1884 -8:00 Vanc P%sT + Zone America/Dawson_Creek -8:00:56 - LMT 1884 + -8:00 Canada P%sT 1947 + -8:00 Vanc P%sT 1972 Aug 30 2:00 + -7:00 - MST + + + # Northwest Territories, Yukon + + # From Paul Eggert (1996-06-12): + # Dawson switched to PST in 1973. Inuvik switched to MST in 1979. + # Shanks's table for Watson Lake is corrupted, so we have no data there. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S ! Rule NT_YK 1918 only - Apr 14 2:00 1:00 D ! Rule NT_YK 1918 only - Oct 27 2:00 0 S ! Rule NT_YK 1919 only - May 25 2:00 1:00 D ! Rule NT_YK 1919 only - Nov 1 0:00 0 S ! Rule NT_YK 1942 only - Feb 9 2:00 1:00 D ! Rule NT_YK 1945 only - Sep 30 2:00 0 S ! # 0:00 ?? ! Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD ! Rule NT_YK 1965 only - Oct lastSun 2:00 0 S ! Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D ! Rule NT_YK 1980 max - Oct lastSun 2:00 0 S ! Rule NT_YK 1987 max - Apr Sun>=1 2:00 1:00 D ! # Zone NAME GMTOFF RULES FORMAT [UNTIL] ! Zone America/Pangnirtung -4:22:56 - LMT 1884 ! -4:00 NT_YK A%sT ! Zone America/Iqaluit -4:33:52 - LMT 1884 # Frobisher Bay ! -5:00 NT_YK E%sT ! Zone America/Rankin_Inlet -6:08:40 - LMT 1884 ! -6:00 NT_YK C%sT ! Zone America/Yellowknife -7:37:24 - LMT 1884 ! -7:00 NT_YK M%sT ! Zone America/Inuvik -8:54:00 - LMT 1884 ! -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 ! -7:00 NT_YK M%sT Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 ! -9:00 NT_YK Y%sT 1966 Jul 1 2:00 ! -8:00 NT_YK P%sT ! Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 ! -9:00 NT_YK Y%sT 1973 Oct lastSun 2:00 ! -8:00 NT_YK P%sT ! ############################################################################### *************** *** 868,873 **** --- 948,957 ---- # The Decree was published in Mexico's Official Newspaper on January 4th. # # -------------- End Forwarded Message -------------- + # From Paul Eggert (1996-06-12): + # For an English translation of the decree, + # see ``Diario Oficial: Time Zone Changeover'', + # <URL:http://mexico-travel.com/extra/timezone_eng.html> (1996-01-04). # From Shanks (1991): # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S