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FW: Adjustment to Australian Daylight Time 2005/2006
by Olson, Arthur David (NIH/NCI) Nov. 7, 2005

Nov. 7, 2005

Jason Tubnor is not on the time zone mailing list; direct replies appropriately. --ado -----Original Message----- From: Jason Tubnor [mailto:jason@tubnor.net] Sent: Monday, November 07, 2005 3:54 AM To: tz(a)lecserver.nci.nih.gov Subject: Adjustment to Australian Daylight Time 2005/2006 Hi, Please find attached the modified australiasia zoneinfo src file. This includes required modification for Commonwealth Games extension to the AEDT for 2005/2006 by one week. Original source file was taken from the OpenBSD src tree (2005/11/07) If you have any questions, please do not hesitate to contact me. Revision and reference information is in the file. Cheers, Jason Tubnor # $OpenBSD: australasia,v 1.22 2005/11/07 15:48:37 millert Exp $ # @(#)australasia 7.73 # This file also includes Pacific islands. # Notes are at the end of this file ############################################################################### # Australia # Please see the notes below for the controversy about "EST" versus "AEST" etc. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Aus 1917 only - Jan 1 0:01 1:00 - Rule Aus 1917 only - Mar 25 2:00 0 - Rule Aus 1942 only - Jan 1 2:00 1:00 - Rule Aus 1942 only - Mar 29 2:00 0 - Rule Aus 1942 only - Sep 27 2:00 1:00 - Rule Aus 1943 1944 - Mar lastSun 2:00 0 - Rule Aus 1943 only - Oct 3 2:00 1:00 - # Go with Whitman and the Australian National Standards Commission, which # says W Australia didn't use DST in 1943/1944. Ignore Whitman's claim that # 1944/1945 was just like 1943/1944. # Zone NAME GMTOFF RULES FORMAT [UNTIL] # Northern Territory Zone Australia/Darwin 8:43:20 - LMT 1895 Feb 9:00 - CST 1899 May 9:30 Aus CST # Western Australia Zone Australia/Perth 7:43:24 - LMT 1895 Dec 8:00 Aus WST 1943 Jul 8:00 - WST 1974 Oct lastSun 2:00s 8:00 1:00 WST 1975 Mar Sun>=1 2:00s 8:00 - WST 1983 Oct lastSun 2:00s 8:00 1:00 WST 1984 Mar Sun>=1 2:00s 8:00 - WST 1991 Nov 17 2:00s 8:00 1:00 WST 1992 Mar Sun>=1 2:00s 8:00 - WST # Queensland # # From Alex Livingston (1996-11-01): # I have heard or read more than once that some resort islands off the coast # of Queensland chose to keep observing daylight-saving time even after # Queensland ceased to. # # From Paul Eggert (1996-11-22): # IATA SSIM (1993-02/1994-09) say that the Holiday Islands (Hayman, Lindeman, # Hamilton) observed DST for two years after the rest of Queensland stopped. # Hamilton is the largest, but there is also a Hamilton in Victoria, # so use Lindeman. # # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule AQ 1971 only - Oct lastSun 2:00s 1:00 - Rule AQ 1972 only - Feb lastSun 2:00s 0 - Rule AQ 1989 1991 - Oct lastSun 2:00s 1:00 - Rule AQ 1990 1992 - Mar Sun>=1 2:00s 0 - Rule Holiday 1992 1993 - Oct lastSun 2:00s 1:00 - Rule Holiday 1993 1994 - Mar Sun>=1 2:00s 0 - Zone Australia/Brisbane 10:12:08 - LMT 1895 10:00 Aus EST 1971 10:00 AQ EST Zone Australia/Lindeman 9:55:56 - LMT 1895 10:00 Aus EST 1971 10:00 AQ EST 1992 Jul 10:00 Holiday EST # South Australia # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule AS 1971 1985 - Oct lastSun 2:00s 1:00 - Rule AS 1986 only - Oct 19 2:00s 1:00 - Rule AS 1987 max - Oct lastSun 2:00s 1:00 - Rule AS 1972 only - Feb 27 2:00s 0 - Rule AS 1973 1985 - Mar Sun>=1 2:00s 0 - Rule AS 1986 1989 - Mar Sun>=15 2:00s 0 - Rule AS 1990 only - Mar Sun>=18 2:00s 0 - Rule AS 1991 only - Mar Sun>=1 2:00s 0 - Rule AS 1992 only - Mar Sun>=18 2:00s 0 - Rule AS 1993 only - Mar Sun>=1 2:00s 0 - Rule AS 1994 only - Mar Sun>=18 2:00s 0 - Rule AS 1995 2005 - Mar lastSun 2:00s 0 - Rule AS 2006 only - Apr Sun>=1 2:00s 0 - Rule AS 2007 max - Mar lastSun 2:00s 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Australia/Adelaide 9:14:20 - LMT 1895 Feb 9:00 - CST 1899 May 9:30 Aus CST 1971 9:30 AS CST # Tasmania # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule AT 1967 only - Oct Sun>=1 2:00s 1:00 - Rule AT 1968 only - Mar lastSun 2:00s 0 - Rule AT 1968 1985 - Oct lastSun 2:00s 1:00 - Rule AT 1969 1971 - Mar Sun>=8 2:00s 0 - Rule AT 1972 only - Feb lastSun 2:00s 0 - Rule AT 1973 1981 - Mar Sun>=1 2:00s 0 - Rule AT 1982 1983 - Mar lastSun 2:00s 0 - Rule AT 1984 1986 - Mar Sun>=1 2:00s 0 - Rule AT 1986 only - Oct Sun>=15 2:00s 1:00 - Rule AT 1987 1990 - Mar Sun>=15 2:00s 0 - Rule AT 1987 only - Oct Sun>=22 2:00s 1:00 - Rule AT 1988 1990 - Oct lastSun 2:00s 1:00 - Rule AT 1991 1999 - Oct Sun>=1 2:00s 1:00 - Rule AT 1991 2005 - Mar lastSun 2:00s 0 - Rule AT 2000 only - Aug lastSun 2:00s 1:00 - Rule AT 2001 max - Oct Sun>=1 2:00s 1:00 - Rule AT 2006 only - Apr Sun>=1 2:00s 0 - Rule AT 2007 max - Mar lastSun 2:00s 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Australia/Hobart 9:49:16 - LMT 1895 Sep 10:00 - EST 1916 Oct 1 2:00 10:00 1:00 EST 1917 Feb 10:00 Aus EST 1967 10:00 AT EST # Victoria # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule AV 1971 1985 - Oct lastSun 2:00s 1:00 - Rule AV 1972 only - Feb lastSun 2:00s 0 - Rule AV 1973 1985 - Mar Sun>=1 2:00s 0 - Rule AV 1986 1990 - Mar Sun>=15 2:00s 0 - Rule AV 1986 1987 - Oct Sun>=15 2:00s 1:00 - Rule AV 1988 1999 - Oct lastSun 2:00s 1:00 - Rule AV 1991 1994 - Mar Sun>=1 2:00s 0 - Rule AV 1995 2005 - Mar lastSun 2:00s 0 - Rule AV 2000 only - Aug lastSun 2:00s 1:00 - Rule AV 2001 max - Oct lastSun 2:00s 1:00 - Rule AV 2006 only - Apr Sun>=1 2:00s 0 - Rule AV 2007 max - Mar lastSun 2:00s 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Australia/Melbourne 9:39:52 - LMT 1895 Feb 10:00 Aus EST 1971 10:00 AV EST # New South Wales # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule AN 1971 1985 - Oct lastSun 2:00s 1:00 - Rule AN 1972 only - Feb 27 2:00s 0 - Rule AN 1973 1981 - Mar Sun>=1 2:00s 0 - Rule AN 1982 only - Apr Sun>=1 2:00s 0 - Rule AN 1983 1985 - Mar Sun>=1 2:00s 0 - Rule AN 1986 1989 - Mar Sun>=15 2:00s 0 - Rule AN 1986 only - Oct 19 2:00s 1:00 - Rule AN 1987 1999 - Oct lastSun 2:00s 1:00 - Rule AN 1990 1995 - Mar Sun>=1 2:00s 0 - Rule AN 1996 2005 - Mar lastSun 2:00s 0 - Rule AN 2000 only - Aug lastSun 2:00s 1:00 - Rule AN 2001 max - Oct lastSun 2:00s 1:00 - Rule AN 2006 only - Apr Sun>=1 2:00s 0 - Rule AN 2007 max - Mar lastSun 2:00s 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Australia/Sydney 10:04:52 - LMT 1895 Feb 10:00 Aus EST 1971 10:00 AN EST Zone Australia/Broken_Hill 9:25:48 - LMT 1895 Feb 10:00 - EST 1896 Aug 23 9:00 - CST 1899 May 9:30 Aus CST 1971 9:30 AN CST 2000 9:30 AS CST # Lord Howe Island # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule LH 1981 1984 - Oct lastSun 2:00 1:00 - Rule LH 1982 1985 - Mar Sun>=1 2:00 0 - Rule LH 1985 only - Oct lastSun 2:00 0:30 - Rule LH 1986 1989 - Mar Sun>=15 2:00 0 - Rule LH 1986 only - Oct 19 2:00 0:30 - Rule LH 1987 1999 - Oct lastSun 2:00 0:30 - Rule LH 1990 1995 - Mar Sun>=1 2:00 0 - Rule LH 1996 max - Mar lastSun 2:00 0 - Rule LH 2000 only - Aug lastSun 2:00 0:30 - Rule LH 2001 max - Oct lastSun 2:00 0:30 - Zone Australia/Lord_Howe 10:36:20 - LMT 1895 Feb 10:00 - EST 1981 Mar 10:30 LH LHST # Australian miscellany # # Ashmore Is, Cartier # no indigenous inhabitants; only seasonal caretakers # like Australia/Perth, says Turner # # Coral Sea Is # no indigenous inhabitants; only meteorologists # no information # # Macquarie # permanent occupation (scientific station) since 1948; # sealing and penguin oil station operated 1888/1917 # like Australia/Hobart, says Turner # Christmas # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Indian/Christmas 7:02:52 - LMT 1895 Feb 7:00 - CXT # Christmas Island Time # Cook Is # From Shanks: # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Cook 1978 only - Nov 12 0:00 0:30 HS Rule Cook 1979 1991 - Mar Sun>=1 0:00 0 - Rule Cook 1979 1990 - Oct lastSun 0:00 0:30 HS # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Rarotonga -10:39:04 - LMT 1901 # Avarua -10:30 - CKT 1978 Nov 12 # Cook Is Time -10:00 Cook CK%sT # Cocos # These islands were ruled by the Ross family from about 1830 to 1978. # We don't know when standard time was introduced; for now, we guess 1900. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Indian/Cocos 6:27:40 - LMT 1900 6:30 - CCT # Cocos Islands Time # Fiji # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Fiji 1998 1999 - Nov Sun>=1 2:00 1:00 S Rule Fiji 1999 2000 - Feb lastSun 3:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Fiji 11:53:40 - LMT 1915 Oct 26 # Suva 12:00 Fiji FJ%sT # Fiji Time # French Polynesia # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Gambier -8:59:48 - LMT 1912 Oct # Rikitea -9:00 - GAMT # Gambier Time Zone Pacific/Marquesas -9:18:00 - LMT 1912 Oct -9:30 - MART # Marquesas Time Zone Pacific/Tahiti -9:58:16 - LMT 1912 Oct # Papeete -10:00 - TAHT # Tahiti Time # Clipperton (near North America) is administered from French Polynesia; # it is uninhabited. # Guam # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Guam -14:21:00 - LMT 1844 Dec 31 9:39:00 - LMT 1901 # Agana 10:00 - GST 2000 Dec 23 # Guam 10:00 - ChST # Chamorro Standard Time # Kiribati # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Tarawa 11:32:04 - LMT 1901 # Bairiki 12:00 - GILT # Gilbert Is Time Zone Pacific/Enderbury -11:24:20 - LMT 1901 -12:00 - PHOT 1979 Oct # Phoenix Is Time -11:00 - PHOT 1995 13:00 - PHOT Zone Pacific/Kiritimati -10:29:20 - LMT 1901 -10:40 - LINT 1979 Oct # Line Is Time -10:00 - LINT 1995 14:00 - LINT # N Mariana Is # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Saipan -14:17:00 - LMT 1844 Dec 31 9:43:00 - LMT 1901 9:00 - MPT 1969 Oct # N Mariana Is Time 10:00 - MPT 2000 Dec 23 10:00 - ChST # Chamorro Standard Time # Marshall Is # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Majuro 11:24:48 - LMT 1901 11:00 - MHT 1969 Oct # Marshall Islands Time 12:00 - MHT Zone Pacific/Kwajalein 11:09:20 - LMT 1901 11:00 - MHT 1969 Oct -12:00 - KWAT 1993 Aug 20 # Kwajalein Time 12:00 - MHT # Micronesia # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Yap 9:12:32 - LMT 1901 # Colonia 9:00 - YAPT 1969 Oct # Yap Time 10:00 - YAPT Zone Pacific/Truk 10:07:08 - LMT 1901 10:00 - TRUT # Truk Time Zone Pacific/Ponape 10:32:52 - LMT 1901 # Kolonia 11:00 - PONT # Ponape Time Zone Pacific/Kosrae 10:51:56 - LMT 1901 11:00 - KOST 1969 Oct # Kosrae Time 12:00 - KOST 1999 11:00 - KOST # Nauru # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Nauru 11:07:40 - LMT 1921 Jan 15 # Uaobe 11:30 - NRT 1942 Mar 15 # Nauru Time 9:00 - JST 1944 Aug 15 11:30 - NRT 1979 May 12:00 - NRT # New Caledonia # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule NC 1977 1978 - Dec Sun>=1 0:00 1:00 S Rule NC 1978 1979 - Feb 27 0:00 0 - Rule NC 1996 only - Dec 1 2:00s 1:00 S # Shanks says the following was at 2:00; go with IATA. Rule NC 1997 only - Mar 2 2:00s 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Noumea 11:05:48 - LMT 1912 Jan 13 11:00 NC NC%sT ############################################################################### # New Zealand # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule NZ 1927 only - Nov 6 2:00 1:00 S Rule NZ 1928 only - Mar 4 2:00 0 M Rule NZ 1928 1933 - Oct Sun>=8 2:00 0:30 S Rule NZ 1929 1933 - Mar Sun>=15 2:00 0 M Rule NZ 1934 1940 - Apr lastSun 2:00 0 M Rule NZ 1934 1940 - Sep lastSun 2:00 0:30 S Rule NZ 1946 only - Jan 1 0:00 0 S # Since 1957 Chatham has been 45 minutes ahead of NZ, but there's no # convenient notation for this so we must duplicate the Rule lines. Rule NZ 1974 only - Nov Sun>=1 2:00s 1:00 D Rule Chatham 1974 only - Nov Sun>=1 2:45s 1:00 D Rule NZ 1975 only - Feb lastSun 2:00s 0 S Rule Chatham 1975 only - Feb lastSun 2:45s 0 S Rule NZ 1975 1988 - Oct lastSun 2:00s 1:00 D Rule Chatham 1975 1988 - Oct lastSun 2:45s 1:00 D Rule NZ 1976 1989 - Mar Sun>=1 2:00s 0 S Rule Chatham 1976 1989 - Mar Sun>=1 2:45s 0 S Rule NZ 1989 only - Oct Sun>=8 2:00s 1:00 D Rule Chatham 1989 only - Oct Sun>=8 2:45s 1:00 D Rule NZ 1990 max - Oct Sun>=1 2:00s 1:00 D Rule Chatham 1990 max - Oct Sun>=1 2:45s 1:00 D Rule NZ 1990 max - Mar Sun>=15 2:00s 0 S Rule Chatham 1990 max - Mar Sun>=15 2:45s 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Auckland 11:39:04 - LMT 1868 Nov 2 11:30 NZ NZ%sT 1946 Jan 1 12:00 NZ NZ%sT Zone Pacific/Chatham 12:13:48 - LMT 1957 Jan 1 12:45 Chatham CHA%sT # Auckland Is # uninhabited; Maori and Moriori, colonial settlers, pastoralists, sealers, # and scientific personnel have wintered # Campbell I # minor whaling stations operated 1909/1914 # scientific station operated 1941/1995; # previously whalers, sealers, pastoralists, and scientific personnel wintered # was probably like Pacific/Auckland ############################################################################### # Niue # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Niue -11:19:40 - LMT 1901 # Alofi -11:20 - NUT 1951 # Niue Time -11:30 - NUT 1978 Oct 1 -11:00 - NUT # Norfolk # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Norfolk 11:11:52 - LMT 1901 # Kingston 11:12 - NMT 1951 # Norfolk Mean Time 11:30 - NFT # Norfolk Time # Palau (Belau) # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Palau 8:57:56 - LMT 1901 # Koror 9:00 - PWT # Palau Time # Papua New Guinea # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Port_Moresby 9:48:40 - LMT 1880 9:48:32 - PMMT 1895 # Port Moresby Mean Time 10:00 - PGT # Papua New Guinea Time # Pitcairn # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Pitcairn -8:40:20 - LMT 1901 # Adamstown -8:30 - PNT 1998 Apr 27 00:00 -8:00 - PST # Pitcairn Standard Time # American Samoa Zone Pacific/Pago_Pago 12:37:12 - LMT 1879 Jul 5 -11:22:48 - LMT 1911 -11:30 - SAMT 1950 # Samoa Time -11:00 - NST 1967 Apr # N=Nome -11:00 - BST 1983 Nov 30 # B=Bering -11:00 - SST # S=Samoa # Samoa Zone Pacific/Apia 12:33:04 - LMT 1879 Jul 5 -11:26:56 - LMT 1911 -11:30 - SAMT 1950 # Samoa Time -11:00 - WST # Samoa Time # Solomon Is # excludes Bougainville, for which see Papua New Guinea # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Guadalcanal 10:39:48 - LMT 1912 Oct # Honiara 11:00 - SBT # Solomon Is Time # Tokelau Is # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Fakaofo -11:24:56 - LMT 1901 -10:00 - TKT # Tokelau Time # Tonga # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Tonga 1999 only - Oct 7 2:00s 1:00 S Rule Tonga 2000 only - Mar 19 2:00s 0 - Rule Tonga 2000 2001 - Nov Sun>=1 2:00 1:00 S Rule Tonga 2001 2002 - Jan lastSun 2:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Tongatapu 12:19:20 - LMT 1901 12:20 - TOT 1941 # Tonga Time 13:00 - TOT 1999 13:00 Tonga TO%sT # Tuvalu # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Funafuti 11:56:52 - LMT 1901 12:00 - TVT # Tuvalu Time # US minor outlying islands # Howland, Baker # uninhabited since World War II # no information; was probably like Pacific/Pago_Pago # Jarvis # uninhabited since 1958 # no information; was probably like Pacific/Kiritimati # Johnston # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Johnston -10:00 - HST # Kingman # uninhabited # Midway # # From Mark Brader (2005-01-23): # [Fallacies and Fantasies of Air Transport History, by R.E.G. Davies, # published 1994 by Paladwr Press, McLean, VA, USA; ISBN 0-9626483-5-3] # reproduced a Pan American Airways timeables from 1936, for their weekly # "Orient Express" flights between San Francisco and Manila, and connecting # flights to Chicago and the US East Coast. As it uses some time zone # designations that I've never seen before:.... # Fri. 6:30A Lv. HONOLOLU (Pearl Harbor), H.I. H.L.T. Ar. 5:30P Sun. # " 3:00P Ar. MIDWAY ISLAND . . . . . . . . . M.L.T. Lv. 6:00A " # Zone Pacific/Midway -11:49:28 - LMT 1901 -11:00 - NST 1956 Jun 3 -11:00 1:00 NDT 1956 Sep 2 -11:00 - NST 1967 Apr # N=Nome -11:00 - BST 1983 Nov 30 # B=Bering -11:00 - SST # S=Samoa # Palmyra # uninhabited since World War II; was probably like Pacific/Kiritimati # Wake # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Wake 11:06:28 - LMT 1901 12:00 - WAKT # Wake Time # Vanuatu # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Vanuatu 1983 only - Sep 25 0:00 1:00 S Rule Vanuatu 1984 1991 - Mar Sun>=23 0:00 0 - Rule Vanuatu 1984 only - Oct 23 0:00 1:00 S Rule Vanuatu 1985 1991 - Sep Sun>=23 0:00 1:00 S Rule Vanuatu 1992 1993 - Jan Sun>=23 0:00 0 - Rule Vanuatu 1992 only - Oct Sun>=23 0:00 1:00 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Efate 11:13:16 - LMT 1912 Jan 13 # Vila 11:00 Vanuatu VU%sT # Vanuatu Time # Wallis and Futuna # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Pacific/Wallis 12:15:20 - LMT 1901 12:00 - WFT # Wallis & Futuna Time ############################################################################### # NOTES # This data is by no means authoritative; if you think you know better, # go ahead and edit the file (and please send any changes to # tz(a)elsie.nci.nih.gov for general use in the future). # Commonwealth Games Addition, Jason Tubnor (2005-11-07): # Due to the Commonwealth Games occuring in Melbourne next year # the Victorian, NSW, ACT and South Australian state # governments / teritories have declared a one week extension # to daylight savings time. See states reference on Tasmanian # government website: # http://www.dpac.tas.gov.au/divisions/policy/daylightsavings # # From Paul Eggert (1999-10-29): # A good source for time zone historical data outside the U.S. is # Thomas G. Shanks, The International Atlas (5th edition), # San Diego: ACS Publications, Inc. (1999). # # Gwillim Law writes that a good source # for recent time zone data is the International Air Transport # Association's Standard Schedules Information Manual (IATA SSIM), # published semiannually. Law sent in several helpful summaries # of the IATA's data after 1990. # # Except where otherwise noted, Shanks is the source for entries through 1990, # and IATA SSIM is the source for entries after 1990. # # Another source occasionally used is Edward W. Whitman, World Time Differences, # Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), which # I found in the UCLA library. # # A reliable and entertaining source about time zones is # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). # # I invented the abbreviations marked `*' in the following table; # the rest are from earlier versions of this file, or from other sources. # Corrections are welcome! # std dst # LMT Local Mean Time # 8:00 WST WST Western Australia # 9:00 JST Japan # 9:30 CST CST Central Australia # 10:00 EST EST Eastern Australia # 10:00 ChST Chamorro # 10:30 LHST LHST Lord Howe* # 11:30 NZMT NZST New Zealand through 1945 # 12:00 NZST NZDT New Zealand 1946-present # 12:45 CHAST CHADT Chatham* # -11:00 SST Samoa # -10:00 HST Hawaii # - 8:00 PST Pitcairn* # # See the `northamerica' file for Hawaii. # See the `southamerica' file for Easter I and the Galapagos Is. ############################################################################### # Australia # <a href="http://www.dstc.qut.edu.au/DST/marg/daylight.html"> # Australia's Daylight Saving Times # </a>, by Margaret Turner, summarizes daylight saving issues in Australia. # From John Mackin (1991-03-06): # We in Australia have _never_ referred to DST as `daylight' time. # It is called `summer' time. Now by a happy coincidence, `summer' # and `standard' happen to start with the same letter; hence, the # abbreviation does _not_ change... # The legislation does not actually define abbreviations, at least # in this State, but the abbreviation is just commonly taken to be the # initials of the phrase, and the legislation here uniformly uses # the phrase `summer time' and does not use the phrase `daylight # time'. # Announcers on the Commonwealth radio network, the ABC (for Australian # Broadcasting Commission), use the phrases `Eastern Standard Time' # or `Eastern Summer Time'. (Note, though, that as I say in the # current australasia file, there is really no such thing.) Announcers # on its overseas service, Radio Australia, use the same phrases # prefixed by the word `Australian' when referring to local times; # time announcements on that service, naturally enough, are made in UTC. # From Arthur David Olson (1992-03-08): # Given the above, what's chosen for year-round use is: # CST for any place operating at a GMTOFF of 9:30 # WST for any place operating at a GMTOFF of 8:00 # EST for any place operating at a GMTOFF of 10:00 # From Paul Eggert (2001-04-05), summarizing a long discussion about "EST" # versus "AEST" etc.: # # I see the following points of dispute: # # * How important are unique time zone abbreviations? # # Here I tend to agree with the point (most recently made by Chris # Newman) that unique abbreviations should not be essential for proper # operation of software. We have other instances of ambiguity # (e.g. "IST" denoting both "Israel Standard Time" and "Indian # Standard Time"), and they are not likely to go away any time soon. # In the old days, some software mistakenly relied on unique # abbreviations, but this is becoming less true with time, and I don't # think it's that important to cater to such software these days. # # On the other hand, there is another motivation for unambiguous # abbreviations: it cuts down on human confusion. This is # particularly true for Australia, where "EST" can mean one thing for # time T and a different thing for time T plus 1 second. # # * Does the relevant legislation indicate which abbreviations should be used? # # Here I tend to think that things are a mess, just as they are in # many other countries. We Americans are currently disagreeing about # which abbreviation to use for the newly legislated Chamorro Standard # Time, for example. # # Personally, I would prefer to use common practice; I would like to # refer to legislation only for examples of common practice, or as a # tiebreaker. # # * Do Australians more often use "Eastern Daylight Time" or "Eastern # Summer Time"? Do they typically prefix the time zone names with # the word "Australian"? # # My own impression is that both "Daylight Time" and "Summer Time" are # common and are widely understood, but that "Summer Time" is more # popular; and that the leading "A" is also common but is omitted more # often than not. I just used AltaVista advanced search and got the # following count of page hits: # # 1,103 "Eastern Summer Time" AND domain:au # 971 "Australian Eastern Summer Time" AND domain:au # 613 "Eastern Daylight Time" AND domain:au # 127 "Australian Eastern Daylight Time" AND domain:au # # Here "Summer" seems quite a bit more popular than "Daylight", # particularly when we know the time zone is Australian and not US, # say. The "Australian" prefix seems to be popular for Eastern Summer # Time, but unpopular for Eastern Daylight Time. # # For abbreviations, tools like AltaVista are less useful because of # ambiguity. Many hits are not really time zones, unfortunately, and # many hits denote US time zones and not Australian ones. But here # are the hit counts anyway: # # 161,304 "EST" and domain:au # 25,156 "EDT" and domain:au # 18,263 "AEST" and domain:au # 10,416 "AEDT" and domain:au # # 14,538 "CST" and domain:au # 5,728 "CDT" and domain:au # 176 "ACST" and domain:au # 29 "ACDT" and domain:au # # 7,539 "WST" and domain:au # 68 "AWST" and domain:au # # This data suggest that Australians tend to omit the "A" prefix in # practice. The situation for "ST" versus "DT" is less clear, given # the ambiguities involved. # # * How do Australians feel about the abbreviations in the tz database? # # If you just count Australians on this list, I count 2 in favor and 3 # against. One of the "against" votes (David Keegel) counseled delay, # saying that both AEST/AEDT and EST/EST are widely used and # understood in Australia. # From Paul Eggert (1995-12-19): # Shanks reports 2:00 for all autumn changes in Australia and New Zealand. # Mark Prior writes that his newspaper # reports that NSW's fall 1995 change will occur at 2:00, # but Robert Elz says it's been 3:00 in Victoria since 1970 # and perhaps the newspaper's `2:00' is referring to standard time. # For now we'll continue to assume 2:00s for changes since 1960. # From Eric Ulevik (1998-01-05): # # Here are some URLs to Australian time legislation. These URLs are stable, # and should probably be included in the data file. There are probably more # relevant entries in this database. # # NSW (including LHI and Broken Hill): # <a href="http://www.austlii.edu.au/au/legis/nsw/consol_act/sta1987137/index.html"> # Standard Time Act 1987 (updated 1995-04-04) # </a> # ACT # <a href="http://www.austlii.edu.au/au/legis/act/consol_act/stasta1972279/index.html"> # Standard Time and Summer Time Act 1972 # </a> # SA # <a href="http://www.austlii.edu.au/au/legis/sa/consol_act/sta1898137/index.html"> # Standard Time Act, 1898 # </a> # Northern Territory # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06): # # The NORTHERN TERRITORY.. [ Courtesy N.T. Dept of the Chief Minister ] # # [ Nov 1990 ] # # N.T. have never utilised any DST due to sub-tropical/tropical location. # ... # Zone Australia/North 9:30 - CST # From Bradley White (1991-03-04): # A recent excerpt from an Australian newspaper... # the Northern Territory do[es] not have daylight saving. # Western Australia # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06): # # The state of WESTERN AUSTRALIA.. [ Courtesy W.A. dept Premier+Cabinet ] # # [ Nov 1990 ] # # W.A. suffers from a great deal of public and political opposition to # # DST in principle. A bill is brought before parliament in most years, but # # usually defeated either in the upper house, or in party caucus # # before reaching parliament. # ... # Zone Australia/West 8:00 AW %sST # ... # Rule AW 1974 only - Oct lastSun 2:00 1:00 D # Rule AW 1975 only - Mar Sun>=1 3:00 0 W # Rule AW 1983 only - Oct lastSun 2:00 1:00 D # Rule AW 1984 only - Mar Sun>=1 3:00 0 W # From Bradley White (1991-03-04): # A recent excerpt from an Australian newspaper... # Western Australia...do[es] not have daylight saving. # From John D. Newman via Bradley White (1991-11-02): # Western Australia is still on "winter time". Some DH in Sydney # rang me at home a few days ago at 6.00am. (He had just arrived at # work at 9.00am.) # W.A. is switching to Summer Time on Nov 17th just to confuse # everybody again. # From Arthur David Olson (1992-03-08): # The 1992 ending date used in the rules is a best guess; # it matches what was used in the past. # <a href="http://www.bom.gov.au/faq/faqgen.htm"> # The Australian Bureau of Meteorology FAQ # </a> (1999-09-27) writes that Giles Meteorological Station uses # South Australian time even though it's located in Western Australia. # Queensland # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06): # # The state of QUEENSLAND.. [ Courtesy Qld. Dept Premier Econ&Trade Devel ] # # [ Dec 1990 ] # ... # Zone Australia/Queensland 10:00 AQ %sST # ... # Rule AQ 1971 only - Oct lastSun 2:00 1:00 D # Rule AQ 1972 only - Feb lastSun 3:00 0 E # Rule AQ 1989 max - Oct lastSun 2:00 1:00 D # Rule AQ 1990 max - Mar Sun>=1 3:00 0 E # From Bradley White (1989-12-24): # "Australia/Queensland" now observes daylight time (i.e. from # October 1989). # From Bradley White (1991-03-04): # A recent excerpt from an Australian newspaper... # ...Queensland...[has] agreed to end daylight saving # at 3am tomorrow (March 3)... # From John Mackin (1991-03-06): # I can certainly confirm for my part that Daylight Saving in NSW did in fact # end on Sunday, 3 March. I don't know at what hour, though. (It surprised # me.) # From Bradley White (1992-03-08): # ...there was recently a referendum in Queensland which resulted # in the experimental daylight saving system being abandoned. So, ... # ... # Rule QLD 1989 1991 - Oct lastSun 2:00 1:00 D # Rule QLD 1990 1992 - Mar Sun>=1 3:00 0 S # ... # From Arthur David Olson (1992-03-08): # The chosen rules the union of the 1971/1972 change and the 1989-1992 changes. # From Rives McDow (2002-04-09): # The most interesting region I have found consists of three towns on the # southern coast of Australia, population 10 at last report, along with # 50,000 sheep, about 100 kilometers long and 40 kilometers into the # continent. The primary town is Madura, with the other towns being # Mundrabilla and Eucla. According to the sheriff of Madura, the # residents got tired of having to change the time so often, as they are # located in a strip overlapping the border of South Australia and Western # Australia. South Australia observes daylight saving time; Western # Australia does not. The two states are one and a half hours apart. The # residents decided to forget about this nonsense of changing the clock so # much and set the local time 20 hours and 45 minutes from the # international date line, or right in the middle of the time of South # Australia and Western Australia. As it only affects about 10 people and # tourists staying at the Madura Motel, it has never really made as big an # impact as Broken Hill. However, as tourist visiting there or anyone # calling the local sheriff will attest, they do keep time in this way. # # From Paul Eggert (2002-04-09): # This is confirmed by the section entitled # "What's the deal with time zones???" in # <http://www.earthsci.unimelb.edu.au/~awatkins/null.html>, # which says a few other things: # # * Border Village, SA also is 45 minutes ahead of Perth. # * The locals call this time zone "central W.A. Time" (presumably "CWAT"). # * The locals also call Western Australia time "Perth time". # # It's not clear from context whether everyone in Western Australia # knows of this naming convention, or whether it's just the people in # this subregion. # South Australia, Tasmania, Victoria # From Arthur David Olson (1992-03-08): # The rules from version 7.1 follow. # There are lots of differences between these rules and # the Shepherd et al. rules. Since the Shepherd et al. rules # and Bradley White's newspaper article are in agreement on # current DST ending dates, no worries. # # Rule Oz 1971 1985 - Oct lastSun 2:00 1:00 - # Rule Oz 1986 max - Oct Sun<=24 2:00 1:00 - # Rule Oz 1972 only - Feb 27 3:00 0 - # Rule Oz 1973 1986 - Mar Sun>=1 3:00 0 - # Rule Oz 1987 max - Mar Sun<=21 3:00 0 - # Zone Australia/Tasmania 10:00 Oz EST # Zone Australia/South 9:30 Oz CST # Zone Australia/Victoria 10:00 Oz EST 1985 Oct lastSun 2:00 # 10:00 1:00 EST 1986 Mar Sun<=21 3:00 # 10:00 Oz EST # From Robert Elz (1991-03-06): # I believe that the current start date for DST is "lastSun" in Oct... # that changed Oct 89. That is, we're back to the # original rule, and that rule currently applies in all the states # that have dst, incl Qld. (Certainly it was true in Vic). # The file I'm including says that happened in 1988, I think # that's incorrect, but I'm not 100% certain. # South Australia # From Bradley White (1991-03-04): # A recent excerpt from an Australian newspaper... # ...South Australia...[has] agreed to end daylight saving # at 3am tomorrow (March 3)... # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06): # # The state of SOUTH AUSTRALIA....[ Courtesy of S.A. Dept of Labour ] # # [ Nov 1990 ] # ... # Zone Australia/South 9:30 AS %sST # ... # Rule AS 1971 max - Oct lastSun 2:00 1:00 D # Rule AS 1972 1985 - Mar Sun>=1 3:00 0 C # Rule AS 1986 1990 - Mar Sun<=21 3:00 0 C # Rule AS 1991 max - Mar Sun>=1 3:00 0 C # From Bradley White (1992-03-11): # Recent correspondence with a friend in Adelaide # contained the following exchange: "Due to the Adelaide Festival, # South Australia delays setting back our clocks for a few weeks." # From Robert Elz (1992-03-13): # I heard that apparently (or at least, it appears that) # South Aus will have an extra 3 weeks daylight saving every even # numbered year (from 1990). That's when the Adelaide Festival # is on... # From Robert Elz (1992-03-16, 00:57:07 +1000): # DST didn't end in Adelaide today (yesterday).... # But whether it's "4th Sunday" or "2nd last Sunday" I have no idea whatever... # (it's just as likely to be "the Sunday we pick for this year"...). # From Bradley White (1994-04-11): # If Sun, 15 March, 1992 was at +1030 as kre asserts, but yet Sun, 20 March, # 1994 was at +0930 as John Connolly's customer seems to assert, then I can # only conclude that the actual rule is more complicated.... # From John Warburton <jwarb(a)SACBH.com.au> (1994-10-07): # The new Daylight Savings dates for South Australia ... # was gazetted in the Government Hansard on Sep 26 1994.... # start on last Sunday in October and end in last sunday in March. # Tasmania # The rules for 1967 through 1991 were reported by George Shepherd # via Simon Woodhead via Robert Elz (1991-03-06): # # The state of TASMANIA.. [Courtesy Tasmanian Dept of Premier + Cabinet ] # # [ Nov 1990 ] # From Bill Hart via Guy Harris (1991-10-10): # Oh yes, the new daylight savings rules are uniquely tasmanian, we have # 6 weeks a year now when we are out of sync with the rest of Australia # (but nothing new about that). # From Alex Livingston (1999-10-04): # I heard on the ABC (Australian Broadcasting Corporation) radio news on the # (long) weekend that Tasmania, which usually goes its own way in this regard, # has decided to join with most of NSW, the ACT, and most of Victoria # (Australia) and start daylight saving on the last Sunday in August in 2000 # instead of the first Sunday in October. # Sim Alam (2000-07-03) reported a legal citation for the 2000/2001 rules: # http://www.thelaw.tas.gov.au/fragview/42++1968+GS3A@EN+2000070300 # Victoria # The rules for 1971 through 1991 were reported by George Shepherd # via Simon Woodhead via Robert Elz (1991-03-06): # # The state of VICTORIA.. [ Courtesy of Vic. Dept of Premier + Cabinet ] # # [ Nov 1990 ] # From Scott Harrington (2001-08-29): # On KQED's "City Arts and Lectures" program last night I heard an # interesting story about daylight savings time. Dr. John Heilbron was # discussing his book "The Sun in the Church: Cathedrals as Solar # Observatories"[1], and in particular the Shrine of Remembrance[2] located # in Melbourne, Australia. # # Apparently the shrine's main purpose is a beam of sunlight which # illuminates a special spot on the floor at the 11th hour of the 11th day # of the 11th month (Remembrance Day) every year in memory of Australia's # fallen WWI soldiers. And if you go there on Nov. 11, at 11am local time, # you will indeed see the sunbeam illuminate the special spot at the # expected time. # # However, that is only because of some special mirror contraption that had # to be employed, since due to daylight savings time, the true solar time of # the remembrance moment occurs one hour later (or earlier?). Perhaps # someone with more information on this jury-rig can tell us more. # # [1] http://www.hup.harvard.edu/catalog/HEISUN.html # [2] http://www.shrine.org.au # New South Wales # From Arthur David Olson: # New South Wales and subjurisdictions have their own ideas of a fun time. # Based on law library research by John Mackin, # who notes: # In Australia, time is not legislated federally, but rather by the # individual states. Thus, while such terms as ``Eastern Standard Time'' # [I mean, of course, Australian EST, not any other kind] are in common # use, _they have NO REAL MEANING_, as they are not defined in the # legislation. This is very important to understand. # I have researched New South Wales time only... # From Paul Eggert (1999-09-27): # The Information Service of the Australian National Standards Commission # <a href="http://www.nsc.gov.au/InfoServ/Ileaflet/il27.htm"> # Daylight Saving # </a> page (1995-04) has an excellent overall history of Australian DST. # The Community Relations Division of the NSW Attorney General's Department # publishes a history of daylight saving in NSW. See: # <a href="http://www.lawlink.nsw.gov.au/crd.nsf/pages/time2"> # Lawlink NSW: Daylight Saving in New South Wales # </a> # From Eric Ulevik (1999-05-26): # DST will start in NSW on the last Sunday of August, rather than the usual # October in 2000. [See: Matthew Moore, # <a href="http://www.smh.com.au/news/9905/26/pageone/pageone4.html"> # Two months more daylight saving # </a> # Sydney Morning Herald (1999-05-26).] # From Paul Eggert (1999-09-27): # See the following official NSW source: # <a href="http://dir.gis.nsw.gov.au/cgi-bin/genobject/document/other/daylightsaving/t…"> # Daylight Saving in New South Wales. # </a> # # Narrabri Shire (NSW) council has announced it will ignore the extension of # daylight saving next year. See: # <a href="http://abc.net.au/news/regionals/neweng/monthly/regeng-22jul1999-1.htm"> # Narrabri Council to ignore daylight saving # </a> (1999-07-22). For now, we'll wait to see if this really happens. # # Victoria will following NSW. See: # <a href="http://abc.net.au/local/news/olympics/1999/07/item19990728112314_1.htm"> # Vic to extend daylight saving # </a> (1999-07-28). # # However, South Australia rejected the DST request. See: # <a href="http://abc.net.au/news/olympics/1999/07/item19990719151754_1.htm"> # South Australia rejects Olympics daylight savings request # </a> (1999-07-19). # # Queensland also will not observe DST for the Olympics. See: # <a href="http://abc.net.au/news/olympics/1999/06/item19990601114608_1.htm"> # Qld says no to daylight savings for Olympics # </a> (1999-06-01), which quotes Queensland Premier Peter Beattie as saying # ``Look you've got to remember in my family when this came up last time # I voted for it, my wife voted against it and she said to me it's all very # well for you, you don't have to worry about getting the children out of # bed, getting them to school, getting them to sleep at night. # I've been through all this argument domestically...my wife rules.'' # # Broken Hill will stick with South Australian time in 2000. See: # <a href="http://abc.net.au/news/regionals/brokenh/monthly/regbrok-21jul1999-6.htm"> # Broken Hill to be behind the times # </a> (1999-07-21). # IATA SSIM (1998-09) says that the spring 2000 change for Australian # Capital Territory, New South Wales except Lord Howe Island and Broken # Hill, and Victoria will be August 27, presumably due to the Sydney Olympics. # From Eric Ulevik, referring to Sydney's Sun Herald (2000-08-13), page 29: # The Queensland Premier Peter Beattie is encouraging northern NSW # towns to use Queensland time. # Yancowinna # From John Mackin (1989-01-04): # `Broken Hill' means the County of Yancowinna. # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06): # # YANCOWINNA.. [ Confirmation courtesy of Broken Hill Postmaster ] # # [ Dec 1990 ] # ... # # Yancowinna uses Central Standard Time, despite [its] location on the # # New South Wales side of the S.A. border. Most business and social dealings # # are with CST zones, therefore CST is legislated by local government # # although the switch to Summer Time occurs in line with N.S.W. There have # # been years when this did not apply, but the historical data is not # # presently available. # Zone Australia/Yancowinna 9:30 AY %sST # ... # Rule AY 1971 1985 - Oct lastSun 2:00 1:00 D # Rule AY 1972 only - Feb lastSun 3:00 0 C # [followed by other Rules] # Lord Howe Island # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06): # LHI... [ Courtesy of Pauline Van Winsen.. pauline@Aus ] # [ Dec 1990 ] # Lord Howe Island is located off the New South Wales coast, and is half an # hour ahead of NSW time. # From James Lonergan, Secretary, Lord Howe Island Board (2000-01-27): # Lord Howe Island summer time in 2000/2001 will commence on the same # date as the rest of NSW (i.e. 2000-08-27). For your information the # Lord Howe Island Board (controlling authority for the Island) is # seeking the community's views on various options for summer time # arrangements on the Island, e.g. advance clocks by 1 full hour # instead of only 30 minutes. Dependant on the wishes of residents # the Board may approach the NSW government to change the existing # arrangements. The starting date for summer time on the Island will # however always coincide with the rest of NSW. # From James Lonergan, Secretary, Lord Howe Island Board (2000-10-25): # Lord Howe Island advances clocks by 30 minutes during DST in NSW and retards # clocks by 30 minutes when DST finishes. Since DST was most recently # introduced in NSW, the "changeover" time on the Island has been 02:00 as # shown on clocks on LHI. I guess this means that for 30 minutes at the start # of DST, LHI is actually 1 hour ahead of the rest of NSW. # From Paul Eggert (2001-02-09): # For Lord Howe dates we use Shanks through 1989, and Lonergan thereafter. # For times we use Lonergan. ############################################################################### # New Zealand # From Mark Davies (1990-10-03): # the 1989/90 year was a trial of an extended "daylight saving" period. # This trial was deemed successful and the extended period adopted for # subsequent years (with the addition of a further week at the start). # source -- phone call to Ministry of Internal Affairs Head Office. # From George Shepherd via Simon Woodhead via Robert Elz (1991-03-06): # # The Country of New Zealand (Australia's east island -) Gee they hate that! # # or is Australia the west island of N.Z. # # [ courtesy of Geoff Tribble.. Geofft@Aus.. Auckland N.Z. ] # # [ Nov 1990 ] # ... # Rule NZ 1974 1988 - Oct lastSun 2:00 1:00 D # Rule NZ 1989 max - Oct Sun>=1 2:00 1:00 D # Rule NZ 1975 1989 - Mar Sun>=1 3:00 0 S # Rule NZ 1990 max - Mar lastSun 3:00 0 S # ... # Zone NZ 12:00 NZ NZ%sT # New Zealand # Zone NZ-CHAT 12:45 - NZ-CHAT # Chatham Island # From Arthur David Olson (1992-03-08): # The chosen rules use the Davies October 8 values for the start of DST in 1989 # rather than the October 1 value. # From Paul Eggert (1995-12-19); # Shanks reports 2:00 for all autumn changes in Australia and New Zealand. # Robert Uzgalis writes that the New Zealand Daylight # Savings Time Order in Council dated 1990-06-18 specifies 2:00 standard # time on both the first Sunday in October and the third Sunday in March. # As with Australia, we'll assume the tradition is 2:00s, not 2:00. # # From Paul Eggert (2003-05-26): # The Department of Internal Affairs (DIA) maintains a brief history, # as does Carol Squires; see tz-link.htm for the full references. # Use these sources in preference to Shanks. # # For Chatham, IATA SSIM (1991/1999) gives the NZ rules but with # transitions at 2:45 local standard time; this confirms that Chatham # is always exactly 45 minutes ahead of Auckland. ############################################################################### # Fiji # Howse writes (p 153) that in 1879 the British governor of Fiji # enacted an ordinance standardizing the islands on Antipodean Time # instead of the American system (which was one day behind). # From Rives McDow (1998-10-08): # Fiji will introduce DST effective 0200 local time, 1998-11-01 # until 0300 local time 1999-02-28. Each year the DST period will # be from the first Sunday in November until the last Sunday in February. # From Paul Eggert (2000-01-08): # IATA SSIM (1999-09) says DST ends 0100 local time. Go with McDow. # From the BBC World Service (1998-10-31 11:32 UTC): # The Fijiian government says the main reasons for the time change is to # improve productivity and reduce road accidents. But correspondents say it # also hopes the move will boost Fiji's ability to compete with other pacific # islands in the effort to attract tourists to witness the dawning of the new # millenium. # http://www.fiji.gov.fj/press/2000_09/2000_09_13-05.shtml (2000-09-13) # reports that Fiji has discontinued DST. # Johnston # Johnston data is from usno1995. # Kiribati # From Paul Eggert (1996-01-22): # Today's _Wall Street Journal_ (page 1) reports that Kiribati # ``declared it the same day throught the country as of Jan. 1, 1995'' # as part of the competition to be first into the 21st century. # Kwajalein # In comp.risks 14.87 (26 August 1993), Peter Neumann writes: # I wonder what happened in Kwajalein, where there was NO Friday, # 1993-08-20. Thursday night at midnight Kwajalein switched sides with # respect to the International Date Line, to rejoin its fellow islands, # going from 11:59 p.m. Thursday to 12:00 m. Saturday in a blink. # N Mariana Is, Guam # Howse writes (p 153) ``The Spaniards, on the other hand, reached the # Philippines and the Ladrones from America,'' and implies that the Ladrones # (now called the Marianas) kept American date for quite some time. # For now, we assume the Ladrones switched at the same time as the Philippines; # see Asia/Manila. # US Public Law 106-564 (2000-12-23) made UTC+10 the official standard time, # under the name "Chamorro Standard Time". There is no official abbreviation, # but Congressman Robert A. Underwood, author of the bill that became law, # wrote in a press release (2000-12-27) that he will seek the use of "ChST". # Micronesia # Alan Eugene Davis writes (1996-03-16), # ``I am certain, having lived there for the past decade, that "Truk" # (now properly known as Chuuk) ... is in the time zone GMT+10.'' # # Shanks writes that Truk switched from UTC+10 to UTC+11 on 1978-10-01; # ignore this for now. # From Paul Eggert (1999-10-29): # The Federated States of Micronesia Visitors Board writes in # <a href="http://www.fsmgov.org/info/clocks.html"> # The Federated States of Micronesia - Visitor Information # </a> (1999-01-26) # that Truk and Yap are UTC+10, and Ponape and Kosrae are UTC+11. # We don't know when Kosrae switched from UTC+12; assume January 1 for now. # Midway # From Charles T O'Connor, KMTH DJ (1956), # quoted in the KTMH section of the Radio Heritage Collection # <http://radiodx.com/spdxr/KMTH.htm> (2002-12-31): # For the past two months we've been on what is known as Daylight # Saving Time. This time has put us on air at 5am in the morning, # your time down there in New Zealand. Starting September 2, 1956 # we'll again go back to Standard Time. This'll mean that we'll go to # air at 6am your time. # # From Paul Eggert (2003-03-23): # We don't know the date of that quote, but we'll guess they # started DST on June 3. Possibly DST was observed other years # in Midway, but we have no record of it. # Pitcairn # From Rives McDow (1999-11-08): # A Proclamation was signed by the Governor of Pitcairn on the 27th March 1998 # with regard to Pitcairn Standard Time. The Proclamation is as follows. # # The local time for general purposes in the Islands shall be # Co-ordinated Universal time minus 8 hours and shall be known # as Pitcairn Standard Time. # # ... I have also seen Pitcairn listed as UTC minus 9 hours in several # references, and can only assume that this was an error in interpretation # somehow in light of this proclamation. # From Rives McDow (1999-11-09): # The Proclamation regarding Pitcairn time came into effect on 27 April 1998 # ... at midnight. # From Howie Phelps (1999-11-10), who talked to a Pitcairner via shortwave: # Betty Christian told me yesterday that their local time is the same as # Pacific Standard Time. They used to be 1/2 hour different from us here in # Sacramento but it was changed a couple of years ago. # Samoa # Howse writes (p 153, citing p 10 of the 1883-11-18 New York Herald) # that in 1879 the King of Samoa decided to change # ``the date in his kingdom from the Antipodean to the American system, # ordaining -- by a masterpiece of diplomatic flattery -- that # the Fourth of July should be celebrated twice in that year.'' # Tonga # From Paul Eggert (1996-01-22): # Today's _Wall Street Journal_ (p 1) reports that ``Tonga has been plotting # to sneak ahead of [New Zealanders] by introducing daylight-saving time.'' # Since Kiribati has moved the Date Line it's not clear what Tonga will do. # Don Mundell writes in the 1997-02-20 Tonga Chronicle # <a href="http://www.tongatapu.net.to/tonga/homeland/timebegins.htm"> # How Tonga became `The Land where Time Begins' # </a>: # Until 1941 Tonga maintained a standard time 50 minutes ahead of NZST # 12 hours and 20 minutes ahead of GMT. When New Zealand adjusted its # standard time in 1940s, Tonga had the choice of subtracting from its # local time to come on the same standard time as New Zealand or of # advancing its time to maintain the differential of 13 degrees # (approximately 50 minutes ahead of New Zealand time). # # Because His Majesty King Taufa'ahau Tupou IV, then Crown Prince # Tungi, preferred to ensure Tonga's title as the land where time # begins, the Legislative Assembly approved the latter change. # # But some of the older, more conservative members from the outer # islands objected. "If at midnight on Dec. 31, we move ahead 40 # minutes, as your Royal Highness wishes, what becomes of the 40 # minutes we have lost?" # # The Crown Prince, presented an unanswerable argument: "Remember that # on the World Day of Prayer, you would be the first people on Earth # to say your prayers in the morning." # From Paul Eggert (1999-08-12): # Shanks says the transition was on 1968-10-01; go with Mundell. # From Eric Ulevik (1999-05-03): # Tonga's director of tourism, who is also secretary of the National Millennium # Committee, has a plan to get Tonga back in front. # He has proposed a one-off move to tropical daylight saving for Tonga from # October to March, which has won approval in principle from the Tongan # Government. # From Steffen Thorsen (1999-09-09): # * Tonga will introduce DST in November # # I was given this link by John Letts: # <a hef="http://news.bbc.co.uk/hi/english/world/asia-pacific/newsid_424000/424764.stm"> # http://news.bbc.co.uk/hi/english/world/asia-pacific/newsid_424000/424764.stm # </a> # # I have not been able to find exact dates for the transition in November # yet. By reading this article it seems like Fiji will be 14 hours ahead # of UTC as well, but as far as I know Fiji will only be 13 hours ahead # (12 + 1 hour DST). # From Arthur David Olson (1999-09-20): # According to <a href="http://www.tongaonline.com/news/sept1799.html> # http://www.tongaonline.com/news/sept1799.html # </a>: # "Daylight Savings Time will take effect on Oct. 2 through April 15, 2000 # and annually thereafter from the first Saturday in October through the # third Saturday of April. Under the system approved by Privy Council on # Sept. 10, clocks must be turned ahead one hour on the opening day and # set back an hour on the closing date." # Alas, no indication of the time of day. # From Rives McDow (1999-10-06): # Tonga started its Daylight Saving on Saturday morning October 2nd at 0200am. # Daylight Saving ends on April 16 at 0300am which is Sunday morning. # From Steffen Thorsen (2000-10-31): # Back in March I found a notice on the website http://www.tongaonline.com # that Tonga changed back to standard time one month early, on March 19 # instead of the original reported date April 16. Unfortunately, the article # is no longer available on the site, and I did not make a copy of the # text, and I have forgotten to report it here. # (Original URL was: http://www.tongaonline.com/news/march162000.htm ) # From Rives McDow (2000-12-01): # Tonga is observing DST as of 2000-11-04 and will stop on 2001-01-27. # From Sione Moala-Mafi (2001-09-20) via Rives McDow: # At 2:00am on the first Sunday of November, the standard time in the Kingdom # shall be moved forward by one hour to 3:00am. At 2:00am on the last Sunday # of January the standard time in the Kingdom shall be moved backward by one # hour to 1:00am. # From Pulu 'Anau (2002-11-05): # The law was for 3 years, supposedly to get renewed. It wasn't. # Wake # From Vernice Anderson, Personal Secretary to Philip Jessup, # US Ambassador At Large (oral history interview, 1971-02-02): # # Saturday, the 14th [of October, 1950] -- ... The time was all the # more confusing at that point, because we had crossed the # International Date Line, thus getting two Sundays. Furthermore, we # discovered that Wake Island had two hours of daylight saving time # making calculation of time in Washington difficult if not almost # impossible. # # http://www.trumanlibrary.org/wake/meeting.htm # From Paul Eggert (2003-03-23): # We have no other report of DST in Wake Island, so omit this info for now. ############################################################################### # The International Date Line # From Gwillim Law (2000-01-03): # # The International Date Line is not defined by any international standard, # convention, or treaty. Mapmakers are free to draw it as they please. # Reputable mapmakers will simply ensure that every point of land appears on # the correct side of the IDL, according to the date legally observed there. # # When Kiribati adopted a uniform date in 1995, thereby moving the Phoenix and # Line Islands to the west side of the IDL (or, if you prefer, moving the IDL # to the east side of the Phoenix and Line Islands), I suppose that most # mapmakers redrew the IDL following the boundary of Kiribati. Even that line # has a rather arbitrary nature. The straight-line boundaries between Pacific # island nations that are shown on many maps are based on an international # convention, but are not legally binding national borders. # # An Anglo-French Conference on Time-Keeping at Sea (June, 1917) agreed that # legal time on the high seas would be zone time, i.e., the standard time at # the nearest meridian that is a multiple of fifteen degrees. The date is # governed by the IDL; therefore, even on the high seas, there may be some # places as late as fourteen hours later than UTC. And, since the IDL is not # an international standard, there are some places on the high seas where the # correct date is ambiguous. # From Paul Eggert, using references suggested by Oscar van Vlijmen # (2005-03-20): # # The American Practical Navigator (2002) # <http://pollux.nss.nima.mil/pubs/pubs_j_apn_sections.html?rid=187> # talks only about the 180-degree meridian with respect to ships in # international waters; it ignores the international date line.

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FW: missing translation in zdump
by Olson, Arthur David (NIH/NCI) Nov. 7, 2005

Nov. 7, 2005

Jakub Bogusz is not on the time zone mailing list; direct replies appropriately. --ado -----Original Message----- From: Jakub Bogusz [mailto:qboosh@pld-linux.org] Sent: Saturday, November 05, 2005 1:54 AM To: tz(a)lecserver.nci.nih.gov Subject: missing translation in zdump Hello, I found that zdump from tzcode2005* (up to 2005n) is missing gettext call for one string (line 228 in zdump.c from tzcode2005n): "%s: warning: zone \"%s\" abbreviation \"%s\" %s\n" Patch attached. -- Jakub Bogusz http://qboosh.cs.net.pl/ --- tzcode2005n/zdump.c.orig 2005-10-17 07:14:28.000000000 +0200 +++ tzcode2005n/zdump.c 2005-11-05 07:33:38.167505808 +0100 @@ -225,7 +225,7 @@ return; (void) fflush(stdout); (void) fprintf(stderr, - "%s: warning: zone \"%s\" abbreviation \"%s\" %s\n", + _("%s: warning: zone \"%s\" abbreviation \"%s\" %s\n"), progname, zone, abbr, wp); warned = TRUE; }

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DST rules change for Georgia
by Teimuraz Abashidze (IT) Nov. 7, 2005

Nov. 7, 2005

Hello tz(a)elsie.nci.nih.gov, Dear sir! I've posted on bugzilla new bug #172279, and they told me to contact you: You need to discuss this with upstream, i.e. tz(a)elsie.nci.nih.gov When upstream accepts a change and incorporates it, we'll then update our packages. But as a rule for tzdata we use the timezone data unmodified from upstream. Description of problem: It's not actually a BUG. Government of Georgia (ExUSSR, Caucasia, capital city Tbilisi) decided to NOT CHANGE daylight sayvings time at 30 Sep. night, as it was done before during last more than 10 years. Currently, we are in fact GMT +4:00, as before 30 October it was GMT +3:00. Currently http://www.worldtimeserver.com/current_time_in_GE.aspx shows correct time for us. The problem is, there is NO FORMAL LAW or governmental document about it. A sfar as I can find, I was told, that there is no document, because we just DIDN'T ISSUE document about swithching to winter time".... I don't know waht can be done, especially knowing, that some years ago our DST rules where changed THREE TIMES during one month... Maybe it's stupid, but maybe it's possible to create TWO separate time zones for Georgia, one with DST settings, one withought? I could't find a way to disable DST in Linux otherwise... BTW, of course it's not related to Fedora Core or any particular distribution, this problem shoul be common for all of them... Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1.Set timezone to Asia/Georgia 2. 3. Actual Results: #date Wed Nov 2 14:56:44 GET 2005 # Expected Results: #date Wed Nov 2 15:56:44 GET 2005 # Best regards, Teimuraz Abashidze Enterprise Network Manager Information Technologies Geocell Ltd. Phone: (995 32) 770100 (ext.7702) Fax: (995 32) 770107 GSM: (995 77) 458001 E-mail: tabashidze(a)geocell.com.ge --------------------------------------------- This e-mail and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you are not the intended recipient you are hereby notified that any dissemination, forwarding, copying or use of any of the information is strictly prohibited, and the e-mail should immediately be deleted. GEOCELL makes no warranty as to the accuracy or completeness of any information contained in this message and hereby excludes any liability of any kind for the information contained therein or for the information transmission, reception, storage or use of such in any way whatsoever. The opinions expressed in this message belong to sender alone and may not necessarily reflect the opinions of GEOCELL.

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Adjustment to Australian Daylight Time 2005/2006
by Jason Tubnor Nov. 7, 2005

Nov. 7, 2005

Hi, Please find attached the modified australiasia zoneinfo src file. This includes required modification for Commonwealth Games extension to the AEDT for 2005/2006 by one week. Original source file was taken from the OpenBSD src tree (2005/11/07) If you have any questions, please do not hesitate to contact me. Revision and reference information is in the file. Cheers, Jason Tubnor

1 0

include Minneapolis
by Rosemary Senjem Nov. 5, 2005

Nov. 5, 2005

Hello, This is a suggestion to include America/Minneapolis in your listing. This city is an epi-center for web development in the Midwest and is a better reference for most Midwesterners than Chicago. Thanks, Rosemary Senjem For Realizing Your Potential T Hand Spun Digital, Inc. Rosemary Senjem <mailto:Leader@HandSpunDigital.com> Leader(a)HandSpunDigital.com mobile: (612) 226-5101 http://www.HandSpunDigital.com <https://www.plaxo.com/add_me?u=21475139229&v0=584736&k0=366614041> Add me to your address book... <http://www.plaxo.com/signature> Want a signature like this?

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missing translation in zdump
by Jakub Bogusz Nov. 5, 2005

Nov. 5, 2005

Hello, I found that zdump from tzcode2005* (up to 2005n) is missing gettext call for one string (line 228 in zdump.c from tzcode2005n): "%s: warning: zone \"%s\" abbreviation \"%s\" %s\n" Patch attached. -- Jakub Bogusz http://qboosh.cs.net.pl/

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FW: problem with tz database
by Olson, Arthur David (NIH/NCI) Nov. 1, 2005

Nov. 1, 2005

Julian cable is not on the time zone mailing list; direct (further) replies appropriately. Whenever a zone of the form XXXnYYY is used and there's no associated time zone data file, the time package generates results appropriate for a place where the standard time abbreviation is XXX, the daylight saving time abbreviation is YYY and the offset from UCT/UTC is n hours. Improvidently, the package assumes that United States rules about when to start and end daylight saving time are in effect; this accounts for the GMT0BST results below. --ado ________________________________ From: Julian Cable [mailto:julian.cable@bbc.co.uk] Sent: Tuesday, November 01, 2005 8:11 AM To: tz(a)lecserver.nci.nih.gov Subject: problem with tz database The following two entries are correct: ws-drm2:~# zdump -v WET | grep 2005 WET Sun Mar 27 00:59:59 2005 UTC = Sun Mar 27 00:59:59 2005 WET isdst=0 gmtoff=0 WET Sun Mar 27 01:00:00 2005 UTC = Sun Mar 27 02:00:00 2005 WEST isdst=1 gmtoff=3600 WET Sun Oct 30 00:59:59 2005 UTC = Sun Oct 30 01:59:59 2005 WEST isdst=1 gmtoff=3600 WET Sun Oct 30 01:00:00 2005 UTC = Sun Oct 30 01:00:00 2005 WET isdst=0 gmtoff=0 ws-drm2:~# zdump -v Europe/London | grep 2005 Europe/London Sun Mar 27 00:59:59 2005 UTC = Sun Mar 27 00:59:59 2005 GMT isdst=0 gmtoff=0 Europe/London Sun Mar 27 01:00:00 2005 UTC = Sun Mar 27 02:00:00 2005 BST isdst=1 gmtoff=3600 Europe/London Sun Oct 30 00:59:59 2005 UTC = Sun Oct 30 01:59:59 2005 BST isdst=1 gmtoff=3600 Europe/London Sun Oct 30 01:00:00 2005 UTC = Sun Oct 30 01:00:00 2005 GMT isdst=0 gmtoff=0 ws-drm2:~# But GMT0BST is not: ws-drm2:~# zdump -v GMT0BST | grep 2005 GMT0BST Sun Apr 3 11:59:59 2005 UTC = Sun Apr 3 11:59:59 2005 GMT isdst=0 gmtoff=0 GMT0BST Sun Apr 3 12:00:00 2005 UTC = Sun Apr 3 13:00:00 2005 BST isdst=1 gmtoff=3600 GMT0BST Sun Oct 30 10:59:59 2005 UTC = Sun Oct 30 11:59:59 2005 BST isdst=1 gmtoff=3600 GMT0BST Sun Oct 30 11:00:00 2005 UTC = Sun Oct 30 11:00:00 2005 GMT isdst=0 gmtoff=0 Julian Cable Project Manager, Transmission & Distribution, BBC World Service T: +44 (0)20 755 73651 F: + 44 (0)20 713 797559 Mob: +44(0) 77 399 20066 * Room 601 NE, Bush House, Strand, PO Box 76, London, WC2B 4PH http://www.bbc.co.uk/worldservice <http://www.bbc.co.uk/worldservice> http://www.bbc.co.uk/ This e-mail (and any attachments) is confidential and may contain personal views which are not the views of the BBC unless specifically stated. If you have received it in error, please delete it from your system. Do not use, copy or disclose the information in any way nor act in reliance on it and notify the sender immediately. Please note that the BBC monitors e-mails sent or received. Further communication will signify your consent to this.

1 0

problem with tz database
by Julian Cable Nov. 1, 2005

Nov. 1, 2005

The following two entries are correct: ws-drm2:~# zdump -v WET | grep 2005 WET Sun Mar 27 00:59:59 2005 UTC = Sun Mar 27 00:59:59 2005 WET isdst=0 gmtoff=0 WET Sun Mar 27 01:00:00 2005 UTC = Sun Mar 27 02:00:00 2005 WEST isdst=1 gmtoff=3600 WET Sun Oct 30 00:59:59 2005 UTC = Sun Oct 30 01:59:59 2005 WEST isdst=1 gmtoff=3600 WET Sun Oct 30 01:00:00 2005 UTC = Sun Oct 30 01:00:00 2005 WET isdst=0 gmtoff=0 ws-drm2:~# zdump -v Europe/London | grep 2005 Europe/London Sun Mar 27 00:59:59 2005 UTC = Sun Mar 27 00:59:59 2005 GMT isdst=0 gmtoff=0 Europe/London Sun Mar 27 01:00:00 2005 UTC = Sun Mar 27 02:00:00 2005 BST isdst=1 gmtoff=3600 Europe/London Sun Oct 30 00:59:59 2005 UTC = Sun Oct 30 01:59:59 2005 BST isdst=1 gmtoff=3600 Europe/London Sun Oct 30 01:00:00 2005 UTC = Sun Oct 30 01:00:00 2005 GMT isdst=0 gmtoff=0 ws-drm2:~# But GMT0BST is not: ws-drm2:~# zdump -v GMT0BST | grep 2005 GMT0BST Sun Apr 3 11:59:59 2005 UTC = Sun Apr 3 11:59:59 2005 GMT isdst=0 gmtoff=0 GMT0BST Sun Apr 3 12:00:00 2005 UTC = Sun Apr 3 13:00:00 2005 BST isdst=1 gmtoff=3600 GMT0BST Sun Oct 30 10:59:59 2005 UTC = Sun Oct 30 11:59:59 2005 BST isdst=1 gmtoff=3600 GMT0BST Sun Oct 30 11:00:00 2005 UTC = Sun Oct 30 11:00:00 2005 GMT isdst=0 gmtoff=0 Julian Cable Project Manager, Transmission & Distribution, BBC World Service T: +44 (0)20 755 73651 F: + 44 (0)20 713 797559 Mob: +44(0) 77 399 20066 * Room 601 NE, Bush House, Strand, PO Box 76, London, WC2B 4PH http://www.bbc.co.uk/worldservice http://www.bbc.co.uk/ This e-mail (and any attachments) is confidential and may contain personal views which are not the views of the BBC unless specifically stated. If you have received it in error, please delete it from your system. Do not use, copy or disclose the information in any way nor act in reliance on it and notify the sender immediately. Please note that the BBC monitors e-mails sent or received. Further communication will signify your consent to this.

1 0

Daylight Saving Time and Energy Conservation (PRB 05-18E): What Will Canada Do?
by Bernard Desruisseaux Oct. 23, 2005

Oct. 23, 2005

http://www.parl.gc.ca/information/library/PRBpubs/prb0518-e.htm

1 0

Fix for Azerbaijan daylight saving rules
by Rustam Aliyev Oct. 23, 2005

Oct. 23, 2005

Dear tz team, I would like to report that the time of daylight saving for Azerbaijan is incorrect in current version of tz. In the latest version of tz, both rules become effective at 1:00am. According to the resolution of the Cabinet of Ministers on daylight saving in the territory of Azerbaijan: 1. Inasmuch as every year since 1997 all clocks are advanced one hour at 4am on the last Sunday of March, Azerbaijan Republic must pass to summer time. 2. By turning clocks back an hour at 5am on the last Sunday of October, summer time is cancelled. Full text of resolution in English and Azeri is available at: <http://aif.az/docs/daylight_res.pdf>. Original images of resolution will be added to this document later. This document is effective since March 1997. Thus, daylight saving rule for Azerbaijan should be: -------------------------------------------------------------------- # Azerbaijan # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Azer 1997 max - Mar lastSun 4:00 1:00 S Rule Azer 1997 max - Oct lastSun 5:00 0 - -------------------------------------------------------------------- Find attached diff file for asia with proper changes against tzdata2005n. This report prepared by Working Group of Azerbaijan Internet Forum. If you need further information feel free to contact me. Kind Regards, Rustam Aliyev Azerbaijan Internet Forum Mobile: (+994 50) 2210213 Web: http://aif.az/ # Rustam Aliyev <rustam(a)code.az> # # According to the resolution of Cabinet of Ministers, 1997 # Resolution available at: http://aif.az/docs/daylight_res.pdf # # diff -pu asia.orig asia --- asia.orig 2005-10-20 17:45:00.492713896 +0500 +++ asia 2005-10-20 17:46:19.815654976 +0500 @@ -100,8 +100,8 @@ Zone Asia/Yerevan 2:58:00 - LMT 1924 May # Azerbaijan # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule Azer 1997 max - Mar lastSun 1:00 1:00 S -Rule Azer 1997 max - Oct lastSun 1:00 0 - +Rule Azer 1997 max - Mar lastSun 4:00 1:00 S +Rule Azer 1997 max - Oct lastSun 5:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Baku 3:19:24 - LMT 1924 May 2 3:00 - BAKT 1957 Mar # Baku Time

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Qu�bec intends to follow the US with the daylight-saving change
by Bernard Desruisseaux Oct. 23, 2005

Oct. 23, 2005

> The Canadian Press reported Sunday that the government of Quebec > intends to encase the step with the Americans as from 2007, so as > not to harm trade between the two States. French article: http://www.cyberpresse.ca/actualites/article/article_complet.php?path=/actu… Printable form of the French article: http://www.cyberpresse.ca/outil/imprimer.php?id=TVRFNU5EQTNOZz09 Translated printable form of the article: http://translate.google.com/translate?u=http%3A%2F%2Fwww.cyberpresse.ca%2Fo… Salut! Bernard

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Re: Daylight Saving Time in Brazil
by Paul Eggert Oct. 13, 2005

Oct. 13, 2005

Ronaldo Vasconcellos <ronaldo(a)cais.rnp.br> writes: > http://www.tldp.org/HOWTO/TimePrecision-HOWTO/tz.html#tz.examples [I'll CC: this message to Avi Alkalay, who maintains that web page, so that he can correct its time zone abbreviations as he sees fit.] As far as I can see, the abbreviations used in the above-referenced table are merely examples and are not meant to be recommendations. Abbreviations like "BRDT" would not correspond to common Brazilian practice, which is to use the Portuguese equivalent of "summer time" rather than "daylight time". As is stated in the tz tables' comments, in 1999 I invented the abbreviations BRT/BRST, AMT/AMST, etc., that are used in the current tz tables for Brazil. As far as I know nobody else has needed, or uses, English-language acronyms for the Brazilian time zone. However, should an alternate tradition arise in practice, of course we'd prefer to use the English-language abbreviations that people are actually using, as opposed to abbreviations that we have invented.

4 5

FW: Change in local time for Uruguay
by Olson, Arthur David (NIH/NCI) Oct. 6, 2005

Oct. 6, 2005

Francisco Pereira is not on the time zone mailing list; direct replies appropriately. Note that a change for Uruguay has already been incorporated in the latest time zone database at ftp://elsie.nci.nih.gov --ado -----Original Message----- From: Francisco Pereira [mailto:fpereira@internet.com.uy] Sent: Wednesday, October 05, 2005 9:25 PM To: tz(a)lecserver.nci.nih.gov Subject: Change in local time for Uruguay Hello. Attached is a patch for UYT recent changes. The government changed the local time between Oct 9 2005 2:00 and Mar 12 2006 the legal time will be GMT-2. The decree is in http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_ 00001.PDF Please check that the patch is correct beacuse I dont know the exact format of the timezone source. The patch is against the file southamerica v 7.55 I get this file from a solaris CVS. Where is the master site so I can I get the file from it? Regards, Francisco.

1 0

Change in local time for Uruguay
by Francisco Pereira Oct. 6, 2005

Oct. 6, 2005

Hello. Attached is a patch for UYT recent changes. The government changed the local time between Oct 9 2005 2:00 and Mar 12 2006 the legal time will be GMT-2. The decree is in http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005… Please check that the patch is correct beacuse I dont know the exact format of the timezone source. The patch is against the file southamerica v 7.55 I get this file from a solaris CVS. Where is the master site so I can I get the file from it? Regards, Francisco. --- southamerica 2005-10-05 21:31:14.000000000 -0300 +++ southamerica-uy20051009 2005-10-05 21:52:46.000000000 -0300 @@ -1060,6 +1060,14 @@ # http://www.presidencia.gub.uy/decretos/2004091502.htm Rule Uruguay 2004 only - Sep Sun>=15 0:00 1:00 S Rule Uruguay 2005 only - Mar Sun>=8 0:00 0 - +# From Francisco Pereira (2005-10-05): +# The uruguayan government has decreed another change in the local time.... +# We REALLY wants to win the prize... :-) +# http://www.presidencia.gub.uy/_Web/decretos/2005/09/09_2005.htm +# http://www.presidencia.gub.uy/_Web/decretos/2005/ +# (continued...) 09/CM%20119_09%2009%202005_00001.PDF +Rule Uruguay 2005 only - Oct 9 2:00 1:00 S +Rule Uruguay 2006 only - Mar 12 2:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28 -3:44:44 - MMT 1920 May 1 # Montevideo MT

1 0

Re: Proposed change to "systemv" file
by Paul Eggert Oct. 4, 2005

Oct. 4, 2005

Olson, Arthur David (NIH/NCI) wrote: >The attached change avoids a "link-to-a-link" situation in the "systemv" >data file. Thanks for catching that; I had missed systemv somehow. However, Indiana will observe DST next year, so we probably should stop equating Indianapolis with "no DST". Also, in reviewing the comments, they need updating in the light of the current US plans for DST, and I found the first line a bit confusing. How about the following further patch? It attempts to address these issues. Does anyone know when the SystemV rules were written? If so, that "1976" below should be changed to that date. It had to be some time in the 1976/1987 time frame. --- systemv 2005/10/03 13:56:37 2001.1.0.1 +++ systemv 2005/10/04 04:31:57 2001.1.0.2 @@ -1,10 +1,10 @@ # @(#)systemv 7.4 -# Old rules, should the need arise. +# The commented-out entries below contain old rules, should the need arise. # No attempt is made to handle Newfoundland, since it cannot be expressed # using the System V "TZ" scheme (half-hour offset), or anything outside # North America (no support for non-standard DST start/end dates), nor -# the change in the DST rules in the US in 1987 (which occurred before +# the changes in the DST rules in the US after 1976 (which occurred after # the old rules were written). # # If you need the old rules, uncomment ## lines and comment-out Link lines. @@ -42,7 +42,7 @@ Link America/Denver SystemV/MST7MDT Link America/Los_Angeles SystemV/PST8PDT Link America/Anchorage SystemV/YST9YDT Link America/Puerto_Rico SystemV/AST4 -Link America/Indiana/Indianapolis SystemV/EST5 +Link America/Panama SystemV/EST5 Link America/Regina SystemV/CST6 Link America/Phoenix SystemV/MST7 Link Pacific/Pitcairn SystemV/PST8

1 0

Proposed change to "systemv" file
by Olson, Arthur David (NIH/NCI) Oct. 3, 2005

Oct. 3, 2005

The attached change avoids a "link-to-a-link" situation in the "systemv" data file. --ado ------- systemv ------- *** /tmp/geta2174 Mon Oct 3 09:56:37 2005 --- /tmp/getb2174 Mon Oct 3 09:56:37 2005 *************** *** 1,4 **** ! # @(#)systemv 7.3 # Old rules, should the need arise. # No attempt is made to handle Newfoundland, since it cannot be expressed --- 1,4 ---- ! # @(#)systemv 7.4 # Old rules, should the need arise. # No attempt is made to handle Newfoundland, since it cannot be expressed *************** *** 42,48 **** Link America/Los_Angeles SystemV/PST8PDT Link America/Anchorage SystemV/YST9YDT Link America/Puerto_Rico SystemV/AST4 ! Link America/Indianapolis SystemV/EST5 Link America/Regina SystemV/CST6 Link America/Phoenix SystemV/MST7 Link Pacific/Pitcairn SystemV/PST8 --- 42,48 ---- Link America/Los_Angeles SystemV/PST8PDT Link America/Anchorage SystemV/YST9YDT Link America/Puerto_Rico SystemV/AST4 ! Link America/Indiana/Indianapolis SystemV/EST5 Link America/Regina SystemV/CST6 Link America/Phoenix SystemV/MST7 Link Pacific/Pitcairn SystemV/PST8

1 0

Tzcode2005n.tar.gz and tzdata2005n.tar.gz
by Olson, Arthur David (NIH/NCI) Oct. 3, 2005

Oct. 3, 2005

The files... ftp://elsie.nci.nih.gov/pub/tzcode2005n.tar.gz ...and... ftp://elsie.nci.nih.gov/pub/tzdata2005n.tar.gz ...are now available; these reflect the changes circulated last week on the time zone mailing list by Paul Eggert (both the Uruguary changes and the Kyrgyzstan et al. changes). --ado

1 0

FW: proposed tz patch for Uruguay
by Olson, Arthur David (NIH/NCI) Oct. 3, 2005

Oct. 3, 2005

-----Original Message----- From: Paul Eggert [mailto:eggert@CS.UCLA.EDU] Sent: Friday, September 30, 2005 1:53 AM To: ec-acd(a)dedicado.net.uy Cc: tz(a)lecserver.nci.nih.gov Subject: proposed tz patch for Uruguay > From: Eduardo [mailto:ec-acd@dedicado.net.uy] > Date: 27 Sep 2005 17:02 > The uruguayan government has decreed a change in the local time. Thanks for letting us know about that. This takes effect October 9 so we should get this out the door. Here's a proposed patch to the tz database (basically, the change you mentioned, along with some commentary). This is in addition to the patch I circulated on this list on September 25 for Kyrgyzstan. =================================================================== RCS file: RCS/southamerica,v retrieving revision 2005.12 retrieving revision 2005.12.0.1 diff -pu -r2005.12 -r2005.12.0.1 --- southamerica 2005/08/22 16:05:26 2005.12 +++ southamerica 2005/09/30 05:45:43 2005.12.0.1 @@ -1055,6 +1055,12 @@ Rule Uruguay 2004 only - Sep 19 0:00 1: # save energy ... it was postponed two weeks.... # http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm Rule Uruguay 2005 only - Mar 27 2:00 0 - +# From Eduardo Cota (2005-09-27): +# +http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%20 +2005_00001.PDF # This means that from 2005-10-09 at 02:00 local time, +until 2006-03-12 at # 02:00 local time, official time in Uruguay will +be at GMT -2. +Rule Uruguay 2005 only - Oct 9 2:00 1:00 S +Rule Uruguay 2006 only - Mar 12 2:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28 -3:44:44 - MMT 1920 May 1 # Montevideo MT

1 0

RE: tznext 64-bit timezones - Comments
by Olson, Arthur David (NIH/NCI) Sept. 27, 2005

Sept. 27, 2005

> Invoking zdump -v...showed many timezones with behavior differences in the early transitions. For example Africa/Addis_Ababa and US/Pacific: Good catch! This happens because, when dealing with instants before the first transition time recorded in a time zone file, "localtime" assumes that the time type to use is the first type that's a "standard time" type. When we're running on a 64-bit system we can deal with instants prior to 1901, but we want to ignore such information when writing the 32-bit portion of the data file to avoid having localtime make the wrong assumption. I've attached a change to the "experimental" version of zic.c (sent around in June on the time zone mailing list) that should address the problem. Note that we end up with very slightly smaller time zone binary files with the change in place. > It might be nice to add an option to zdump to print out the POSIX TZ equivalent for the timezone. Nice yes; not so straightforward. Recall that zdump (very deliberately) knows nothing about the format of time zone data files; it simply makes repeated calls to localtime, looks for unexpected shifts in the return values, and prints information about the instants at which shifts occur. With the "experimental" time zone data files, it is possible to use a script such as... #! /bin/sh ZONEINFODIR=$HOME/src/tzexp2/tmp/etc/zoneinfo for file in `find $ZONEINFODIR -type f -print` do tail -1 $file | sed "s@^@$file: @" done ...to print the equivalents. --ado ------- zic.c ------- *** /tmp/geta7744 Tue Sep 27 16:52:10 2005 --- /tmp/getb7744 Tue Sep 27 16:52:10 2005 *************** *** 1,4 **** ! static char elsieid[] = "@(#)zic.c 7.149"; #include "private.h" #include "locale.h" --- 1,4 ---- ! static char elsieid[] = "@(#)zic.c 7.150"; #include "private.h" #include "locale.h" *************** *** 1584,1589 **** --- 1584,1592 ---- register int thistimei, thistimecnt; register int thisleapi, thisleapcnt; register int thistimelim, thisleaplim; + int writetype[TZ_MAX_TIMES]; + int typemap[TZ_MAX_TYPES]; + register int thistypecnt; if (pass == 1) { thistimei = timei32; *************** *** 1598,1613 **** } thistimelim = thistimei + thistimecnt; thisleaplim = thisleapi + thisleapcnt; #define DO(field) (void) fwrite((void *) tzh.field, \ (size_t) sizeof tzh.field, (size_t) 1, fp) tzh = tzh0; (void) strncpy(tzh.tzh_magic, TZ_MAGIC, sizeof tzh.tzh_magic); tzh.tzh_version[0] = ZIC_VERSION; ! convert(eitol(typecnt), tzh.tzh_ttisgmtcnt); ! convert(eitol(typecnt), tzh.tzh_ttisstdcnt); convert(eitol(thisleapcnt), tzh.tzh_leapcnt); convert(eitol(thistimecnt), tzh.tzh_timecnt); ! convert(eitol(typecnt), tzh.tzh_typecnt); convert(eitol(charcnt), tzh.tzh_charcnt); DO(tzh_magic); DO(tzh_version); --- 1601,1624 ---- } thistimelim = thistimei + thistimecnt; thisleaplim = thisleapi + thisleapcnt; + for (i = 0; i < typecnt; ++i) + writetype[i] = FALSE; + for (i = thistimei - 1; i < thistimelim; ++i) + if (i >= 0) + writetype[types[i]] = TRUE; + thistypecnt = 0; + for (i = 0; i < typecnt; ++i) + typemap[i] = writetype[i] ? thistypecnt++ : -1; #define DO(field) (void) fwrite((void *) tzh.field, \ (size_t) sizeof tzh.field, (size_t) 1, fp) tzh = tzh0; (void) strncpy(tzh.tzh_magic, TZ_MAGIC, sizeof tzh.tzh_magic); tzh.tzh_version[0] = ZIC_VERSION; ! convert(eitol(thistypecnt), tzh.tzh_ttisgmtcnt); ! convert(eitol(thistypecnt), tzh.tzh_ttisstdcnt); convert(eitol(thisleapcnt), tzh.tzh_leapcnt); convert(eitol(thistimecnt), tzh.tzh_timecnt); ! convert(eitol(thistypecnt), tzh.tzh_typecnt); convert(eitol(charcnt), tzh.tzh_charcnt); DO(tzh_magic); DO(tzh_version); *************** *** 1623,1638 **** if (pass == 1) puttzcode((long) ats[i], fp); else puttzcode64(ats[i], fp); ! if (thistimecnt > 0) ! (void) fwrite((void *) &types[thistimei], ! (size_t) sizeof types[0], ! (size_t) thistimecnt, fp); - for (i = 0; i < typecnt; ++i) { - puttzcode(gmtoffs[i], fp); - (void) putc(isdsts[i], fp); - (void) putc(abbrinds[i], fp); } if (charcnt != 0) (void) fwrite((void *) chars, (size_t) sizeof chars[0], (size_t) charcnt, fp); --- 1634,1654 ---- if (pass == 1) puttzcode((long) ats[i], fp); else puttzcode64(ats[i], fp); ! for (i = thistimei; i < thistimelim; ++i) { ! unsigned char uc; ! ! uc = typemap[types[thistimei]]; ! (void) fwrite((void *) &uc, ! (size_t) sizeof uc, ! (size_t) 1, fp); } + for (i = 0; i < typecnt; ++i) + if (writetype[i]) { + puttzcode(gmtoffs[i], fp); + (void) putc(isdsts[i], fp); + (void) putc(abbrinds[i], fp); + } if (charcnt != 0) (void) fwrite((void *) chars, (size_t) sizeof chars[0], (size_t) charcnt, fp); *************** *** 1662,1670 **** puttzcode(corr[i], fp); } for (i = 0; i < typecnt; ++i) ! (void) putc(ttisstds[i], fp); for (i = 0; i < typecnt; ++i) ! (void) putc(ttisgmts[i], fp); } (void) fprintf(fp, "\n%s\n", string); if (ferror(fp) || fclose(fp)) { --- 1678,1688 ---- puttzcode(corr[i], fp); } for (i = 0; i < typecnt; ++i) ! if (writetype[i]) ! (void) putc(ttisstds[i], fp); for (i = 0; i < typecnt; ++i) ! if (writetype[i]) ! (void) putc(ttisgmts[i], fp); } (void) fprintf(fp, "\n%s\n", string); if (ferror(fp) || fclose(fp)) {

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FW: Change in Uruguay time zone
by Olson, Arthur David (NIH/NCI) Sept. 27, 2005

Sept. 27, 2005

Eduardo Cota is not on the time zone mailing list; direct replies appropriately. --ado -----Original Message----- From: Eduardo [mailto:ec-acd@dedicado.net.uy] Sent: Tuesday, September 27, 2005 5:02 PM To: tz(a)lecserver.nci.nih.gov Subject: Fw: Change in Uruguay time zone If no one has yet reported this ... (did not see it in the latest time zone data): The uruguayan government has decreed a change in the local time. The decree in the government's web site (in Spanish): http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_ 00001.PDF This means that from 9 October 2005 at 2:00 local time, until 12 March 2006 at 2:00 local time, official time in Uruguay will be at GMT -2 This means that the file "zoneinfo/southamerica" should be changed. I assume the change must be to add the following 2 lines Rule Uruguay 2005 only - Oct 9 2:00 1:00 S Rule Uruguay 2006 only - Mar 12 2:00 0 - I am no authority in Uruguay, just a timezone user. Yours, Eduardo Cota.

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Fw: Change in Uruguay time zone
by Eduardo Sept. 27, 2005

Sept. 27, 2005

If no one has yet reported this ... (did not see it in the latest time zone data): The uruguayan government has decreed a change in the local time. The decree in the government's web site (in Spanish): http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005… This means that from 9 October 2005 at 2:00 local time, until 12 March 2006 at 2:00 local time, official time in Uruguay will be at GMT -2 This means that the file "zoneinfo/southamerica" should be changed. I assume the change must be to add the following 2 lines Rule Uruguay 2005 only - Oct 9 2:00 1:00 S Rule Uruguay 2006 only - Mar 12 2:00 0 - I am no authority in Uruguay, just a timezone user. Yours, Eduardo Cota.

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FW: tznext 64-bit timezones - Comments
by Olson, Arthur David (NIH/NCI) Sept. 27, 2005

Sept. 27, 2005

-----Original Message----- From: Robbin Kawabata [mailto:Robbin.Kawabata@eng.sun.com] Sent: Friday, September 23, 2005 12:09 PM To: ... Cc: robbin.kawabata(a)sun.com Subject: tznext 64-bit timezones - Comments Here's some feedback on the 64-bit times proposal dated 6/30/05. 1. New (TZif2) vs. old (TZif) format zoneinfo files and old localtime() To check how an old localtime() would behave with timezones compiled with tznext zic.c, I compared zdump behavior using these combinations: zoneinfo data version of zic localtime() files used to compile version zoneinfo files -------------- ----------------- ----------- a. tzdata2005k zic.c - 2005k 2005k b. tzdata2005k zic.c - tznext 2005k Invoking zdump -v (32-bit) against the timezones for combinations a. vs. b. showed many timezones with behavior differences in the early transitions. For example Africa/Addis_Ababa and US/Pacific: 1,3c1,3 < Africa/Addis_Ababa Fri Dec 13 20:45:52 1901 UTC = Fri Dec 13 23:21:12 1901 AD MT isdst=0 < Africa/Addis_Ababa Sat Dec 14 20:45:52 1901 UTC = Sat Dec 14 23:21:12 1901 AD MT isdst=0 < Africa/Addis_Ababa Mon May 4 21:24:39 1936 UTC = Mon May 4 23:59:59 1936 AD MT isdst=0 --- > Africa/Addis_Ababa Fri Dec 13 20:45:52 1901 UTC = Fri Dec 13 23:20:40 > 1901 LM T isdst=0 > Africa/Addis_Ababa Sat Dec 14 20:45:52 1901 UTC = Sat Dec 14 23:20:40 > 1901 LM T isdst=0 > Africa/Addis_Ababa Mon May 4 21:24:39 1936 UTC = Mon May 4 23:59:27 > 1936 LM T isdst=0 1,3c1,3 < US/Pacific Fri Dec 13 20:45:52 1901 UTC = Fri Dec 13 12:45:52 1901 PST isdst= 0 < US/Pacific Sat Dec 14 20:45:52 1901 UTC = Sat Dec 14 12:45:52 1901 PST isdst= 0 < US/Pacific Sun Mar 31 09:59:59 1918 UTC = Sun Mar 31 01:59:59 1918 PST isdst= 0 --- > US/Pacific Fri Dec 13 20:45:52 1901 UTC = Fri Dec 13 12:52:54 1901 > LMT isdst= 0 > US/Pacific Sat Dec 14 20:45:52 1901 UTC = Sat Dec 14 12:52:54 1901 > LMT isdst= 0 > US/Pacific Sun Mar 31 09:59:59 1918 UTC = Sun Mar 31 02:07:01 1918 > LMT isdst= 0 Also note 32-bit vs. 64-bit zdump/localtime() behave differently with the tznext zoneinfo files. (The 64-bit 2005k localtime() behavior seems OK.) /* Problem - 32-bit */ % ./sparc/zdump -v -c 1901,1919 US/Pacific US/Pacific Tue Sep 20 18:27:45 2005 UTC = Tue Sep 20 11:27:45 2005 PDT isdst=1 US/Pacific Fri Dec 13 20:45:52 1901 UTC = Fri Dec 13 12:52:54 1901 LMT isdst=0 US/Pacific Sat Dec 14 20:45:52 1901 UTC = Sat Dec 14 12:52:54 1901 LMT isdst=0 US/Pacific Sun Mar 31 09:59:59 1918 UTC = Sun Mar 31 02:07:01 1918 LMT isdst=0 US/Pacific Sun Mar 31 10:00:00 1918 UTC = Sun Mar 31 03:00:00 1918 PDT isdst=1 US/Pacific Sun Oct 27 08:59:59 1918 UTC = Sun Oct 27 01:59:59 1918 PDT isdst=1 US/Pacific Sun Oct 27 09:00:00 1918 UTC = Sun Oct 27 01:00:00 1918 PST isdst=0 US/Pacific Tue Jan 19 03:14:07 2038 UTC = Mon Jan 18 19:14:07 2038 PST isdst=0 US/Pacific Mon Jan 18 03:14:07 2038 UTC = Sun Jan 17 19:14:07 2038 PST isdst=0 /* OK - 64-bit */ % ./sparcv9/zdump -v -c 1901,1919 US/Pacific US/Pacific Tue Sep 20 18:27:24 2005 UTC = Tue Sep 20 11:27:24 2005 PDT isdst=1 US/Pacific -9223372036854775808 = NULL US/Pacific -9223372036854689408 = NULL US/Pacific Sun Mar 31 09:59:59 1918 UTC = Sun Mar 31 01:59:59 1918 PST isdst=0 US/Pacific Sun Mar 31 10:00:00 1918 UTC = Sun Mar 31 03:00:00 1918 PDT isdst=1 US/Pacific Sun Oct 27 08:59:59 1918 UTC = Sun Oct 27 01:59:59 1918 PDT isdst=1 US/Pacific Sun Oct 27 09:00:00 1918 UTC = Sun Oct 27 01:00:00 1918 PST isdst=0 US/Pacific 9223372036854775807 = NULL US/Pacific 9223372036854689407 = NULL /* OK - 64-bit */ % ./sparcv9/zdump -v -c 1880,1919 US/Pacific US/Pacific Tue Sep 20 18:32:29 2005 UTC = Tue Sep 20 11:32:29 2005 PDT isdst=1 US/Pacific -9223372036854775808 = NULL US/Pacific -9223372036854689408 = NULL US/Pacific Sun Nov 18 19:59:59 1883 UTC = Sun Nov 18 12:07:01 1883 LMT isdst=0 US/Pacific Sun Nov 18 20:00:00 1883 UTC = Sun Nov 18 12:00:00 1883 PST isdst=0 US/Pacific Sun Mar 31 09:59:59 1918 UTC = Sun Mar 31 01:59:59 1918 PST isdst=0 US/Pacific Sun Mar 31 10:00:00 1918 UTC = Sun Mar 31 03:00:00 1918 PDT isdst=1 US/Pacific Sun Oct 27 08:59:59 1918 UTC = Sun Oct 27 01:59:59 1918 PDT isdst=1 US/Pacific Sun Oct 27 09:00:00 1918 UTC = Sun Oct 27 01:00:00 1918 PST isdst=0 US/Pacific 9223372036854775807 = NULL US/Pacific 9223372036854689407 = NULL 2. tznext approach This how I think the tznext approach works. Please correct as needed. a. If the timezone has a POSIX TZ equivalent, then: a1. zic - zic writes 64-bit transitions to the second part of the zoneinfo file (after the second TZif2 header) for times between the lowest year through the highest year specified in the rules for the timezone. If the highest year in the rules is less than 2037, 2037 is used as the highest year. This section can accomodate transitions outside the range of years 1901-2037. a2. localtime() - When a timezone is newly loaded, the POSIX TZ equivalent is used to generate ~400 (more?) years (into the future) worth of transitions into a table (see tzload()->tzparse()). Then localtime() uses the 400-year cycle approach to calculate transitions in the future that are outside the transition table. a3. far past times - zic can exit with "too many transitions" error if the rules define transitions for very early years (eg, "min") which would cause zic to overflow the 1200 entry transition table. Note, none of the timezones in the current timezone source files use "min". An example of rules that could generate this error is the commented-out SystemV rules in the systemv source file. b. If the timezone does not have a POSIX TZ equivalent, then: b1. zic - the 64-bit transition table in the second part of the zoneinfo file (after the second TZif2 header) has transitions for the period from 400 years before the lowest year, through 400 years after the highest year, where the years are specified in the rules for the timezone. This section can accomodate transitions outside the range of years 1901-2037. b2. localtime() - localtime() uses the 400-year cycle approach to calculate times outside the range of the transition table. b3. far past times - zic can handle the "min" keyword for timezones that do not have a POSIX TZ equivalent, because for these timezones, zic creates a 400-year transition table for far past times. 3. zic - "min" keyword Since zic can now issue an error with "min", and since min is described on zic.1 man page, perhaps we should: - Change zic to use a lower bounds year for "min" if it encounters the table overrun condition. zic should issue a warning if this occurs. Document this behavior on the zic man page. or - Just document the limitation with "min" on the zic man page. In the Notes section suggest a workaround to change "min" to a lower year value. 4. zdump It might be nice to add an option to zdump to print out the POSIX TZ equivalent for the timezone.

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proposed tz patch for Kyrgyzstan, etc.
by Paul Eggert Sept. 25, 2005

Sept. 25, 2005

Malik Abdugaliev writes that the tz database is already incorrect for the tm_isdst flag in Kyrgyzstan, and will report the wrong UTC offset for time stamps starting October 30. Here's a patch for this, along with some commentary and URL fixes that I had saved up. Patches affecting data: * Kyrgyzstan stopped observing DST on August 12. Thanks to Malik Abdugaliev for this info. Commentary changes: * Spell "Kygyzstan" and "Kyrgyz" consistently. * Add more info about times of ships at sea, taken from Wikipedia. * Add a comment about a few towns in Alabama that observe Eastern time, even though legal time is Central. As far as we know the practice has been going on for some time, and they can use TZ='America/New_York'. URL changes in tz-link.htm: * Restore pointer to <http://www.energy.ca.gov/daylightsaving.html>, since that web page is being updated again. * Remove pointers to these no-longer-working locations: http://time.world-stay.com/ http://www.lawlink.nsw.gov.au/Lawlink/Corporate/ll_corporate.nsf/pages/atto… * Update URLs that were moved or forwarded. =================================================================== RCS file: RCS/asia,v retrieving revision 2005.13 retrieving revision 2005.13.0.2 diff -pu -r2005.13 -r2005.13.0.2 --- asia 2005/08/29 15:54:31 2005.13 +++ asia 2005/09/25 23:51:17 2005.13.0.2 @@ -1044,18 +1044,22 @@ Zone Asia/Oral 3:25:24 - LMT 1924 May 2 # <http://eng.gateway.kg/cgi-bin/page.pl?id=1&story_name=doc9979.shtml> # Kyrgyzstan is canceling the daylight saving time system. I take the article # to mean that they will leave their clocks at 6 hours ahead of UTC. +# From Malik Abdugaliev (2005-09-21): +# Our government cancels daylight saving time 6th of August 2005. +# From 2005-08-12 our GMT-offset is +6, w/o any daylight saving. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule Kirgiz 1992 1996 - Apr Sun>=7 0:00s 1:00 S -Rule Kirgiz 1992 1996 - Sep lastSun 0:00 0 - -Rule Kirgiz 1997 max - Mar lastSun 2:30 1:00 S -Rule Kirgiz 1997 max - Oct lastSun 2:30 0 - +Rule Kyrgyz 1992 1996 - Apr Sun>=7 0:00s 1:00 S +Rule Kyrgyz 1992 1996 - Sep lastSun 0:00 0 - +Rule Kyrgyz 1997 2005 - Mar lastSun 2:30 1:00 S +Rule Kyrgyz 1997 2004 - Oct lastSun 2:30 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Bishkek 4:58:24 - LMT 1924 May 2 5:00 - FRUT 1930 Jun 21 # Frunze Time 6:00 RussiaAsia FRU%sT 1991 Mar 31 2:00s 5:00 1:00 FRUST 1991 Aug 31 2:00 # independence - 5:00 Kirgiz KG%sT # Kirgizstan Time + 5:00 Kyrgyz KG%sT 2005 Aug 12 # Kyrgyzstan Time + 6:00 - KGT ############################################################################### =================================================================== RCS file: RCS/australasia,v retrieving revision 2005.12 retrieving revision 2005.12.0.1 diff -pu -r2005.12 -r2005.12.0.1 --- australasia 2005/08/22 16:05:26 2005.12 +++ australasia 2005/09/25 22:28:01 2005.12.0.1 @@ -1375,16 +1375,26 @@ Zone Pacific/Wallis 12:15:20 - LMT 1901 # mapmakers redrew the IDL following the boundary of Kiribati. Even that line # has a rather arbitrary nature. The straight-line boundaries between Pacific # island nations that are shown on many maps are based on an international -# convention, but are not legally binding national borders. -# -# An Anglo-French Conference on Time-Keeping at Sea (June, 1917) agreed that -# legal time on the high seas would be zone time, i.e., the standard time at -# the nearest meridian that is a multiple of fifteen degrees. The date is +# convention, but are not legally binding national borders.... The date is # governed by the IDL; therefore, even on the high seas, there may be some # places as late as fourteen hours later than UTC. And, since the IDL is not # an international standard, there are some places on the high seas where the # correct date is ambiguous. +# From Wikipedia <http://en.wikipedia.org/wiki/Time_zone> (2005-08-31): +# Before 1920, all ships kept local apparent time on the high seas by setting +# their clocks at night or at the morning sight so that, given the ship's +# speed and direction, it would be 12 o'clock when the Sun crossed the ship's +# meridian (12 o'clock = local apparent noon). During 1917, at the +# Anglo-French Conference on Time-keeping at Sea, it was recommended that all +# ships, both military and civilian, should adopt hourly standard time zones +# on the high seas. Whenever a ship was within the territorial waters of any +# nation it would use that nation's standard time. The captain was permitted +# to change his ship's clocks at a time of his choice following his ship's +# entry into another zone time--he often chose midnight. These zones were +# adopted by all major fleets between 1920 and 1925 but not by many +# independent merchant ships until World War II. + # From Paul Eggert, using references suggested by Oscar van Vlijmen # (2005-03-20): # =================================================================== RCS file: RCS/northamerica,v retrieving revision 2005.13 retrieving revision 2005.13.0.1 diff -pu -r2005.13 -r2005.13.0.1 --- northamerica 2005/08/29 15:54:31 2005.13 +++ northamerica 2005/09/25 22:28:01 2005.13.0.1 @@ -244,6 +244,16 @@ Rule US 2007 max - Nov Sun>=1 2:00 0 S # and didn't change their clocks for Daylight Saving ... so that their # reports will always have times which are 5 hours behind UTC. +# From Paul Eggert (2005-08-26): +# According to today's Huntsville Times +# <http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/112504778322832…> +# a few towns on Alabama's "eastern border with Georgia, such as Phenix City +# in Russell County, Lanett in Chambers County and some towns in Lee County, +# set their watches and clocks on Eastern time." It quotes H.H. "Bubba" +# Roberts, city administrator in Phenix City. as saying "We are in the Central +# time zone, but we do go by the Eastern time zone because so many people work +# in Columbus." + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule NYC 1920 only - Mar lastSun 2:00 1:00 D Rule NYC 1920 only - Oct lastSun 2:00 0 S =================================================================== RCS file: RCS/tz-link.htm,v retrieving revision 2005.13 retrieving revision 2005.13.0.1 diff -pu -r2005.13 -r2005.13.0.1 --- tz-link.htm 2005/08/29 15:54:31 2005.13 +++ tz-link.htm 2005/09/25 22:28:01 2005.13.0.1 @@ -9,7 +9,7 @@ <meta http-equiv="Content-type" content='text/html; charset="US-ASCII"' /> <meta name="DC.Creator" content="Eggert, Paul" /> <meta name="DC.Contributor" content="Olson, Arthur David" /> -<meta name="DC.Date" content="2005-03-11" /> +<meta name="DC.Date" content="2005-09-25" /> <meta name="DC.Description" content="Sources of information about time zones and daylight saving time" /> <meta name="DC.Identifier" content="http://www.twinsun.com/tz/tz-link.htm" /> @@ -52,7 +52,7 @@ title="DJ's GNU Programming Platform">DJ <a href="http://www.sgi.com/developers/technology/irix/">IRIX</a>, <a href="http://www.apple.com/macosx/">Mac OS X</a>, <a href="http://h71000.www7.hp.com/">OpenVMS</a>, -<a href="http://wwws.sun.com/software/solaris/">Solaris</a>, +<a href="http://www.sun.com/software/solaris/">Solaris</a>, <a href="http://h30097.www3.hp.com/">Tru64</a>, and <a href="http://www.sco.com/products/unixware/">UnixWare</a>.</p> <p> @@ -122,7 +122,6 @@ throughout the world.</li> <li><a href="http://www.convertit.com/Go/ConvertIt/World_Time/Current_Time.ASP">Current Time in 1000 Places</a></li> -<li><a href="http://time.world-stay.com/">The time around the world</a></li> <li><a href="http://timezoneconverter.com/">Time Zone Converter</a></li> </ul></li> <li><a href="http://www.timeanddate.com/worldclock/">The World Clock - @@ -180,7 +179,7 @@ available under both the <abbr>GPL</abbr License. DateTime::TimeZone also contains a script <code>tests_from_zdump</code> that generates test cases for each clock transition in the <code>tz</code> database.</li> -<li><a href="http://ibm.com/software/globalization/icu"><abbr +<li><a href="http://www-306.ibm.com/software/globalization/icu/"><abbr title="International Components for Unicode">ICU</abbr></a> contains a C/C++ library for internationalization that has a compiler from <code>tz</code> source @@ -219,7 +218,8 @@ It is freely available under a <abbr>BSD </ul> <h2>Other <code>tz</code>-based time zone software</h2> <ul> -<li><a href="http://freshmeat.net/projects/intclock">International +<li><a +href="http://users.skynet.be/Peter.Verthez/projects/intclock/">International clock (intclock)</a> is a multi-timezone clock for <abbr>GNU</abbr>/Linux and similar systems. It is freely available under the <abbr>GPL</abbr>.</li> @@ -258,10 +258,9 @@ contains data from the Time Service Depa for the <code>usno*</code> files in the <code>tz</code> distribution.</li> <li>The <a href="http://www.iata.org/ps/publications/9179.htm">Standard Schedules Information Manual</a> of the -the <a href="http://www.iata.org/">International Air Transport -Association</a>, -which gives current time zone rules for -all the airports served by commercial aviation.</li> +<a href="http://www.iata.org/index.htm">International Air Transport +Association</a> +gives current time zone rules for airports served by commercial aviation.</li> </ul> <h2>Maps</h2> <ul> @@ -315,6 +314,8 @@ surveys the evolution of timekeeping.</l <li><a href="http://webexhibits.org/daylightsaving/">About Daylight Saving Time - History, rationale, laws & dates</a> is an overall history of <abbr>DST</abbr>.</li> +<li><a href="http://www.energy.ca.gov/daylightsaving.html">Saving Time, +Saving Energy</a> discusses a primary justification for <abbr>DST</abbr>.</li> <li><a href="http://www.seizethedaylight.com/dst/">Who Knew? A Brief History of Daylight Saving Time</a> summarizes some of the contentious history of <abbr>DST</abbr>.</li> @@ -333,11 +334,7 @@ Zone Concepts</a> discusses terminologic <dl> <dt>Australia</dt> <dd>The Bureau of Metrology publishes a list of -<a href="http://www.bom.gov.au/climate/averages/tables/dst_times.shtml">Implementation Dates of Daylight Savings Time within Australia</a>. -The Community Relations Division of the New South Wales -Attorney General's Department maintains a history of <a -href="http://www.lawlink.nsw.gov.au/Lawlink/Corporate/ll_corporate.nsf/pages/atto…">Daylight -Saving in New South Wales</a>.</dd> +<a href="http://www.bom.gov.au/climate/averages/tables/dst_times.shtml">Implementation Dates of Daylight Savings Time within Australia</a>.</dd> <dt>Austria</dt> <dd>The Federal Office of Metrology and Surveying publishes a table of <a href="http://www.metrologie.at/pdf/sommerzeit.pdf" @@ -354,7 +351,7 @@ Portuguese)</a>.</dd> <dt>Canada</dt> <dd>The Institute for National Measurement Standards publishes current and some older information about <a -href="http://inms-ienm.nrc-cnrc.gc.ca/time_services/daylight_savings_e.html">Time +href="http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php">Time Zones & Daylight Saving Time</a>.</dd> <dt>Chile</dt> <dd>WebExhibits publishes a <a @@ -408,7 +405,7 @@ of Summer time dates</a>.</dd> <h2>Precision timekeeping</h2> <ul> <li><a -href="http://literature.agilent.com/litwebbin/purl.cgi?org_id=tmo&pub_id=5965…">The +href="http://literature.agilent.com/litweb/pdf/5965-7984E.pdf">The Science of Timekeeping</a> is a thorough introduction to the theory and practice of precision timekeeping.</li> <li><a href="http://www.ntp.org/"><abbr @@ -462,13 +459,13 @@ Second Discussion List</a> and <a href="http://rom.usno.navy.mil/archives/leapsecs.html">archive</a> covers <a href="http://gauss.gge.unb.ca/papers.pdf/gpsworld.november99.pdf">McCarthy and Klepczynski's proposal to discontinue leap seconds</a>, published in <a -href="http://www.gpsworld.com/"><abbr +href="http://www.gpsworld.com/gpsworld/"><abbr title="Global Positioning System">GPS</abbr> World</a> <strong>10</strong>, 11 (1999-11), 50–57 and discussed further in R. A. Nelson et al., <a href="http://www.cl.cam.ac.uk/~mgk25/time/metrologia-leapsecond.pdf">The leap second: its history and possible future</a>, -<a href="http://www.bipm.fr/metrologia/">Metrologia</a> +<a href="http://www.bipm.fr/metrologia/index.html">Metrologia</a> <strong>38</strong> (2001), 509–529. <a href="http://www.ucolick.org/~sla/leapsecs/onlinebib.html">The Future of Leap Seconds</a> catalogs information about this @@ -502,7 +499,7 @@ protocols.</li> Best of Dates, the Worst of Dates</a> covers many problems encountered by software developers when handling dates and time stamps.</li> <li><a -href="http://ibm.com/software/globalization/icu"><abbr>ICU</abbr></a> +href="http://www-306.ibm.com/software/globalization/icu/"><abbr>ICU</abbr></a> contains a mechanism for localizing time zone labels and abbreviations; for example, one can use it to specify Russian translations for "Eastern European Summer Time",

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FW: Changing timezone Asia/Bishkek for FreeBSD
by Olson, Arthur David (NIH/NCI) Sept. 22, 2005

Sept. 22, 2005

Malik Abdugaliev is not on the time zone mailing list; direct replies appropriately. --ado -----Original Message----- From: Malik Abdugaliev [mailto:malik@elcat.kg] Sent: Wednesday, September 21, 2005 2:03 AM To: tz(a)lecserver.nci.nih.gov Subject: Changing timezone Asia/Bishkek for FreeBSD Dear Sirs, I'm one of network administrators of Internet service provider ElCat (http://www.elcat.kg/) We are place in Bishkek, Kyrgyzstan. We use FreeBSD 4.10 and 5.4 and we need to update time zone file for our country. Our government cancels daylight saving time 6th of August 2005. >From August 12 2005 our GMT-offset is +6, w/o any daylight saving. Please check my changes for zone Asia/Bishkek and rule Kirgiz in file /usr/src/share/zoneinfo/asia is correct and make the changes for use in the future: #--- cut here # Kyrgyzstan (Kirgizstan) # Transitions through 1991 are from Shanks. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/ Rule Kirgiz 1992 1996 - Apr Sun>=7 0:00s 1:00 S Rule Kirgiz 1992 1996 - Sep lastSun 0:00 0 - Rule Kirgiz 1997 2005 - Mar lastSun 2:30 1:00 S Rule Kirgiz 1997 2004 - Oct lastSun 2:30 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Bishkek 4:58:24 - LMT 1924 May 2 5:00 - FRUT 1930 Jun 21 # Frunze Time 6:00 RussiaAsia FRU%sT 1991 Mar 31 2:00s 5:00 1:00 FRUST 1991 Aug 31 2:00 # independence 5:00 Kirgiz KG%sT 2005 Aug 12 # Kirgizstan Time 6:00 - KGT # Kyrgyzstan Time #--- cut here Unfortunately I didn't find any official documents published in Internet in English. Thank you much. Malik Abdugaliev. # Network Administrator # ElCat, Bishkek, Kyrgyzstan # ZED-RIPE # http://www.elcat.kg/

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Changing timezone Asia/Bishkek for FreeBSD
by Malik Abdugaliev Sept. 21, 2005

Sept. 21, 2005

Dear Sirs, I'm one of network administrators of Internet service provider ElCat (http://www.elcat.kg/) We are place in Bishkek, Kyrgyzstan. We use FreeBSD 4.10 and 5.4 and we need to update time zone file for our country. Our government cancels daylight saving time 6th of August 2005. >From August 12 2005 our GMT-offset is +6, w/o any daylight saving. Please check my changes for zone Asia/Bishkek and rule Kirgiz in file /usr/src/share/zoneinfo/asia is correct and make the changes for use in the future: #--- cut here # Kyrgyzstan (Kirgizstan) # Transitions through 1991 are from Shanks. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/ Rule Kirgiz 1992 1996 - Apr Sun>=7 0:00s 1:00 S Rule Kirgiz 1992 1996 - Sep lastSun 0:00 0 - Rule Kirgiz 1997 2005 - Mar lastSun 2:30 1:00 S Rule Kirgiz 1997 2004 - Oct lastSun 2:30 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Bishkek 4:58:24 - LMT 1924 May 2 5:00 - FRUT 1930 Jun 21 # Frunze Time 6:00 RussiaAsia FRU%sT 1991 Mar 31 2:00s 5:00 1:00 FRUST 1991 Aug 31 2:00 # independence 5:00 Kirgiz KG%sT 2005 Aug 12 # Kirgizstan Time 6:00 - KGT # Kyrgyzstan Time #--- cut here Unfortunately I didn't find any official documents published in Internet in English. Thank you much. Malik Abdugaliev. # Network Administrator # ElCat, Bishkek, Kyrgyzstan # ZED-RIPE # http://www.elcat.kg/

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