Here are some proposed changes to the tz data that I've been saving up for a while. * Revamp the rules for Latvia since 1944, taken from a very nice summary of legal citations sent in Thursday by Liene Kanepe. * The following changes came from data derived from recent issues of the IATA SSIM, kindly forwarded by Gwillim Law. - Lithuania and Estonia observe EU DST rules starting this year. - Two states in Mexico switched time zones last year, requiring the addition of two entries: America/Cancun and America/Chihuahua. - Crimea switched back to EET from Moscow time last year. - Libya stopped observing DST this year, and last year used rules other than what the older SSIM predicted. - Egypt's DST transitions are the 4th Friday in April, not the last Friday; transitions occur at midnight (not at 01:00 in spring and 03:00 in fall). - Kirgizstan switched to EU-like rules (except switching at 02:30 local time) last year. - Azerbaijan switched from the EU rules to slightly localized rules (switching at 01:00 local time instead of 01:00 UTC) last year. - New Caledonia stopped observing DST last year. - Cuba's DST rules are now more like the US's (but not exactly like). - Haiti stopped observing DST this year. - Paraguay's DST dates have changed slightly. - Update guesses about what happened in Armenia between 1992 and 1997. * The following changes were derived from a newer version (1995) of Shanks's atlas. - What is now Uzbekistan had two time zones until 1981. Add an entry Asia/Samarkand to reflect the other zone. (I always wanted an excuse to add Samarkand....) - Asia/Ashkhabad, Asia/Dushanbe, and Asia/Tashkent switched to standard time in 1930, not 1957. There were several other changes for these cities between 1930 and the present. - Europe/Minsk had several changes for times before 1992. - The Cook Islands stopped observing DST in 1991. - Add greater precision to historical times for Asia/Colombo (e.g. it was at 5:19:32 (not 5:20) between 1880 and 1906), America/Cayman, America/Jamaica, America/St_Vincent, America/Grand_Turk. * Update references in WWW.htm, and remove a stray </P> that nsgmls said does not conform to the standard. * Rename Asia/Alma-Ata to Asia/Almaty, as most references in English to this city now use the Kazakh name instead of the older Russian name. Here is the patch: =================================================================== RCS file: RCS/WWW.htm,v retrieving revision 1998.5 retrieving revision 1998.5.1.1 diff -p -u -r1998.5 -r1998.5.1.1 --- WWW.htm 1998/05/28 13:56:25 1998.5 +++ WWW.htm 1998/09/23 00:18:21 1998.5.1.1 @@ -9,7 +9,6 @@ <H6> @(#)WWW.htm 7.15 </H6> -</P> <H2>Paul Eggert writes:</H2><P> The public-domain tz database contains code and data that represent the history of local time @@ -63,17 +62,18 @@ Time of Internet</A> contains good descriptions of Time Zones and daylight saving time, with diagrams. The time zone map is out of date, however. -<LI><A HREF="http://community.bellcore.com/mbr/gmt-explained.html">A Few Facts -Concerning GMT, UT, and the RGO</A> +<LI><A HREF="http://ecco.bsee.swin.edu.au/chronos/GMT-explained.html">A +Few Facts Concerning GMT, UT, and the RGO</A> answers questions like ``What is the difference between GMT and UTC?'' <LI><A HREF="http://www.energy.ca.gov/daylightsaving.html">Daylight Saving Time -- Saving Time, Saving Energy</A> is a history of DST in the US. -<LI><A HREF="http://www.yahoo.com/Science/Weights_and_Measures/Measurements/Time/Daylight_Saving_Time/">Yahoo! - Science:Weights and Measures:Measurements:Time:Daylight Saving Time</A> +<LI><A HREF="http://dir.yahoo.com/Science/Measurements_and_Units/Time/Time_Zones/">Yahoo! - Science:Measurements and Units:Time:Time Zones</A> is where the famous Internet indexing service Yahoo! collects its time zone info. <LI>The <A HREF="http://www.iata.org/">International Air Transport Association</A> -publishes the IATA SSIM, which gives current time zone rules for +publishes the IATA Standard Schedules Information Manual (SSIM), +which gives current time zone rules for all the airports served by commercial aviation. <LI><A HREF="http://hpiers.obspm.fr/webiers/results/bul/README.html">Bulletins of IERS</A> contains official publications of the @@ -82,11 +82,11 @@ when leap seconds occur. </UL> <P> -- <A HREF="mailto:eggert@twinsun.com">eggert@twinsun.com</A> -(1997-12-26) +(1998-09-22) </P> <H2>Arthur David Olson writes:</H2><P> A good source of information about ISO 8601 seems to be -<A HREF="http://www.ft.uni-erlangen.de/~mskuhn/iso-time.html">International +<A HREF="http://www.cl.cam.ac.uk/~mgk25/iso-time.html">International Standard Date and Time Notation</A> maintained by Markus Kuhn. <P> =================================================================== RCS file: RCS/africa,v retrieving revision 1998.5 retrieving revision 1998.5.1.1 diff -p -u -r1998.5 -r1998.5.1.1 --- africa 1998/05/28 13:56:12 1998.5 +++ africa 1998/09/23 00:18:21 1998.5.1.1 @@ -206,9 +206,10 @@ Rule Egypt 1983 only - Jul 12 1:00 1:00 Rule Egypt 1984 1988 - May 1 1:00 1:00 S Rule Egypt 1989 only - May 6 1:00 1:00 S Rule Egypt 1990 1994 - May 1 1:00 1:00 S -# IATA (after 1990) says transitions are at 0:00; go with Shanks. -Rule Egypt 1995 max - Apr lastFri 1:00 1:00 S -Rule Egypt 1995 max - Sep lastFri 3:00 0 - +# IATA (after 1990) says transitions are at 0:00. +# Go with IATA starting in 1995. +Rule Egypt 1995 max - Apr Fri>=22 0:00s 1:00 S +Rule Egypt 1995 max - Sep lastFri 23:00s 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Africa/Cairo 2:05:00 - LMT 1900 Oct @@ -323,15 +324,16 @@ Rule Libya 1987 1990 - Oct 1 0:00 0 - Rule Libya 1990 only - May 4 0:00 1:00 S Rule Libya 1996 only - Mar 30 2:00s 1:00 S Rule Libya 1996 only - Sep 30 2:00s 0 - -Rule Libya 1997 max - Mar lastThu 2:00s 1:00 S -Rule Libya 1997 max - Oct Thu>=1 2:00s 0 - +Rule Libya 1997 only - Apr 4 0:00 1:00 S +Rule Libya 1997 only - Oct 4 0:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Africa/Tripoli 0:52:44 - LMT 1920 1:00 Libya CE%sT 1959 2:00 - EET 1982 1:00 Libya CE%sT 1991 2:00 - EET 1996 Mar 30 3:00 - 1:00 Libya CE%sT + 1:00 Libya CE%sT 1997 Oct 4 0:00 + 2:00 - EET # Madagascar # Zone NAME GMTOFF RULES FORMAT [UNTIL] =================================================================== RCS file: RCS/asia,v retrieving revision 1998.5 retrieving revision 1998.5.1.1 diff -p -u -r1998.5 -r1998.5.1.1 --- asia 1998/05/28 13:56:14 1998.5 +++ asia 1998/09/23 00:18:21 1998.5.1.1 @@ -7,8 +7,8 @@ # From Paul Eggert <eggert@twinsun.com> (1996-11-22): # # A good source for time zone historical data outside the U.S. is -# Thomas G. Shanks, The International Atlas (3rd edition), -# San Diego: ACS Publications, Inc. (1991). +# Thomas G. Shanks, The International Atlas (4th edition), +# San Diego: ACS Publications, Inc. (1995). # Except where otherwise noted, it is the source for the data below. # # Gwillim Law <LAW@encmail.encompass.com> writes that a good source @@ -78,24 +78,30 @@ Zone Asia/Kabul 4:36:48 - LMT 1890 4:30 - AFT # Armenia -# From Paul Eggert (1996-05-04): +# From Paul Eggert (1998-??-??): # Shanks has Yerevan switching to 3:00 (with Russian DST) in spring 1991, # but usno1995 has Armenia at 4:00 (with DST), and Edgar Der-Danieliantz -# <edd@AIC.NET> reported today that Yerevan probably won't use DST this year, -# though it did use DST in 1995. We guess Yerevan stayed in sync with Moscow -# between 1990 and 1995, but stopped using DST in 1996. -# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule Armenia 1991 1995 - Mar lastSun 2:00s 1:00 S -Rule Armenia 1991 1995 - Sep lastSun 2:00s 0 - +# <edd@AIC.NET> reported (1996-05-04) that Yerevan probably wouldn't use DST +# in 1996, though it did use DST in 1995. IATA SSIM (1991/1998) reports that +# Armenia switched from 3:00 to 4:00 in 1998 and observed DST after 1991, +# but started switching at 3:00s in 1998. +# What a mess! We guess Yerevan DST stayed in sync with Moscow between 1990 +# and 1995, did not use DST in 1996, and started using DST again in 1997. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Yerevan 2:58:00 - LMT 1924 May 2 3:00 - YERT 1957 Mar # Yerevan Time 4:00 RussiaAsia YER%sT 1991 Mar 31 2:00s 3:00 1:00 YERST 1991 Sep 23 # independence - 3:00 Armenia AM%sT 1992 Jan 19 2:00s # Armenia Time - 4:00 Armenia AM%sT + 3:00 1:00 AMST 1991 Sep 29 2:00s # Armenia Time + 3:00 - AMT 1992 Jan 19 2:00s + 4:00 RussiaAsia AM%sT 1996 + 4:00 - AMT 1997 + 4:00 RussiaAsia AM%sT # 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 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Baku 3:19:24 - LMT 1924 May 2 3:00 - BAKT 1957 Mar # Baku Time @@ -103,7 +109,8 @@ Zone Asia/Baku 3:19:24 - LMT 1924 May 2 3:00 1:00 BAKST 1991 Aug 30 # independence 3:00 RussiaAsia AZ%sT 1992 Sep lastSun 2:00s 4:00 - AZT 1996 # Azerbaijan time - 4:00 EUAsia AZ%sT + 4:00 EUAsia AZ%sT 1997 + 4:00 Azer AZ%sT # Bahrain # Zone NAME GMTOFF RULES FORMAT [UNTIL] @@ -183,7 +190,7 @@ Zone Asia/Phnom_Penh 6:59:40 - LMT 1906 # note about Time magazine, though apparently _something_ happened in 1986. # Go with Shanks for now. I made up names for the other pre-1980 time zones. -# From Shanks (1991): +# From Shanks (1995): # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Shang 1940 only - Jun 3 0:00 1:00 D Rule Shang 1940 1941 - Oct 1 0:00 0 S @@ -458,12 +465,7 @@ Zone Asia/Baghdad 2:57:40 - LMT 1890 # ISRAEL 2 H AHEAD OF UTC # ISRAEL 3 H AHEAD OF UTC APR 10 - SEP 3 -# From Paul Eggert <eggert@twinsun.com> (1993-11-18): -# -# Shanks gives the following rules for Jerusalem from 1918 through 1991. -# After 1989 Shanks often disagrees with Silverberg; we go with Silverberg. - -# From Shanks (1991): +# From Shanks (1995): # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Zion 1940 only - Jun 1 0:00 1:00 D Rule Zion 1942 1944 - Nov 1 0:00 0 S @@ -569,6 +571,12 @@ Rule Zion 1997 only - Sep 14 0:00 0 S Rule Zion 1998 only - Mar 20 0:00 1:00 D Rule Zion 1998 only - Sep 6 0:00 0 S +# From Member of Knesset Avraham Poraz, as quoted in Ha'aretz (1998-09-02): +# [The 1998-09-06 transition is to] serve the interests of a small minority +# of ultra-Orthodox Sephardic Jews who, during the [Hebrew] month of Elul, +# recite Slihot penitential prayers in the early morning hours +# and thus find daylight time inconvenient. + # From Paul Eggert (1998-01-12): # Here are guesses for rules after 1998. # They are probably wrong, but they are more likely than no DST at all. @@ -644,7 +652,7 @@ Zone Asia/Amman 2:23:44 - LMT 1931 # IATA SSIM mentions a third time zone in Kazakhstan. # # Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Asia/Alma-Ata 5:07:48 - LMT 1924 May 2 # or Almaty +Zone Asia/Almaty 5:07:48 - LMT 1924 May 2 # or Alma-Ata 5:00 - ALMT 1957 Mar # Alma-Ata Time 6:00 RussiaAsia ALM%sT 1991 Mar 31 2:00s 5:00 1:00 ALMST 1991 Sep 29 2:00s @@ -666,11 +674,13 @@ Zone Asia/Aqtau 3:21:04 - LMT 1924 May # Kirgizstan # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule Kirgiz 1992 max - Apr Sun>=7 0:00 1:00 S -Rule Kirgiz 1991 max - Sep lastSun 0:00 0 - +Rule Kirgiz 1992 1996 - Apr Sun>=7 0:00 1:00 S +Rule Kirgiz 1991 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 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Bishkek 4:58:24 - LMT 1924 May 2 - 5:00 - FRUT 1957 Mar # Frunze Time + 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 # independence 5:00 Kirgiz KG%sT # Kirgizstan Time @@ -684,7 +694,7 @@ Zone Asia/Bishkek 4:58:24 - LMT 1924 May # Daylight Savings Time was not observed until 1987. He did not know # at what time of day DST starts or ends. -# From Shanks (1991): +# From Shanks (1995): # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule ROK 1960 only - May 15 0:00 1:00 D Rule ROK 1960 only - Sep 13 0:00 0 S @@ -957,7 +967,7 @@ Zone Asia/Singapore 6:55:24 - LMT 1880 # </a> # reported ``the country's standard time will be put forward by one hour at # midnight Friday (1830 GMT) `in the light of the present power crisis'.'' -# Transitions before 1996 are from Shanks (1991). +# Transitions before 1996 are from Shanks (1995). # # From Dharmasiri Senanayake, Sri Lanka Media Minister (1996-10-24), as quoted # by Shamindra in @@ -969,7 +979,7 @@ Zone Asia/Singapore 6:55:24 - LMT 1880 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Colombo 5:19:24 - LMT 1880 - 5:20 - CEYT 1906 # Ceylon Time + 5:19:32 - MMT 1906 # Moratuwa Mean Time 5:30 - IST 1942 Jan 5 5:30 0:30 IHST 1942 Sep 5:30 1:00 IST 1945 Oct 16 2:00 @@ -1007,7 +1017,8 @@ Rule Syria 1991 1992 - Oct 1 0:00 0 - Rule Syria 1992 only - Apr 8 0:00 1:00 S Rule Syria 1993 only - Mar 26 0:00 1:00 S Rule Syria 1993 only - Sep 25 0:00 0 - -# IATA SSIM (1996-09) says 1997-03-31; assume that it should be 1997-04-01. +# IATA SSIM (1996-09) says 1997-03-31; (1998-02) says 1998-04-02, +# 1999-03-29, and 1999-09-29; ignore all these claims for now. Rule Syria 1994 max - Apr 1 0:00 1:00 S Rule Syria 1994 max - Oct 1 0:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] @@ -1015,9 +1026,10 @@ Zone Asia/Damascus 2:25:12 - LMT 1920 2:00 Syria EE%sT # Tajikistan +# From Shanks (1995), who writes ``date of change uncertain'' for 1991. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Dushanbe 4:35:12 - LMT 1924 May 2 - 5:00 - DUST 1957 Mar # Dushanbe Time + 5:00 - DUST 1930 Jun 21 # Dushanbe Time 6:00 RussiaAsia DUS%sT 1991 Mar 31 2:00s 5:00 1:00 DUSST 1991 Sep 9 # independence 5:00 RussiaAsia TJ%sT 1992 @@ -1030,14 +1042,17 @@ Zone Asia/Bangkok 6:42:04 - LMT 1880 7:00 - ICT # Turkmenistan +# From Shanks (1995): # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Asia/Ashkhabad 3:53:32 - LMT 1924 May 2 # or Ashgabat - 4:00 - ASHT 1957 Mar # Ashkhabad Time - 5:00 RussiaAsia ASH%sT 1991 Mar 31 2:00s - 4:00 1:00 ASHST 1991 Sep 29 2:00s - 4:00 - ASHT 1991 Oct 27 # independence - 4:00 - TMT 1992 Jan 19 2:00s - 5:00 - TMT # Turkmenistan Time + 4:00 - ASHT 1930 Jun 21 # Ashkhabad Time + 5:00 - ASHT 1981 Apr 1 + 5:00 1:00 ASHST 1981 Oct 1 + 6:00 - ASHT 1982 Apr 1 + 5:00 RussiaAsia ASH%sT 1991 + 5:00 - ASHT 1991 Oct 27 # independence + 5:00 RussiaAsia TM%sT 1993 # Turkmenistan Time + 5:00 - TMT # United Arab Emirates # Zone NAME GMTOFF RULES FORMAT [UNTIL] @@ -1045,14 +1060,24 @@ Zone Asia/Dubai 3:41:12 - LMT 1920 4:00 - GST # Uzbekistan +# From Shanks (1995): # Zone NAME GMTOFF RULES FORMAT [UNTIL] +Zone Asia/Samarkand 4:27:12 - LMT 1924 May 2 + 4:00 - SAMT 1930 Jun 21 # Samarkand Time + 5:00 - SAMT 1981 Apr 1 + 5:00 1:00 SAMST 1981 Oct 1 + 6:00 RussiaAsia TAS%sT 1991 Mar 31 2:00 # Tashkent Time + 5:00 - TAST 1991 Sep 1 # independence + 5:00 - UZT 1992 + 5:00 RussiaAsia UZ%sT 1993 + 5:00 - UZT Zone Asia/Tashkent 4:37:12 - LMT 1924 May 2 - 5:00 - TAST 1957 Mar # Tashkent Time + 5:00 - TAST 1930 Jun 21 # Tashkent Time 6:00 RussiaAsia TAS%sT 1991 Mar 31 2:00s - 5:00 1:00 TASST 1991 Sep 29 2:00s - 5:00 - UZT # Uzbekistan Time -# Shanks has Tashkent using DST after 1991, but usno1995 says they don't. -# Guess no DST after 1991. + 5:00 - TAST 1991 Sep 1 # independence + 5:00 - UZT 1992 + 5:00 RussiaAsia UZ%sT 1993 + 5:00 - UZT # Vietnam # From Paul Eggert <eggert@twinsun.com> (1993-11-18): =================================================================== RCS file: RCS/australasia,v retrieving revision 1998.5 retrieving revision 1998.5.1.1 diff -p -u -r1998.5 -r1998.5.1.1 --- australasia 1998/05/28 13:56:14 1998.5 +++ australasia 1998/09/23 00:18:21 1998.5.1.1 @@ -181,10 +181,11 @@ Zone Indian/Christmas 7:02:52 - LMT 1895 7:00 - CXT # Christmas Island Time # Cook Is +# From Shanks (1995): # 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 max - Mar Sun>=1 0:00 0 - -Rule Cook 1979 max - Oct lastSun 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 @@ -270,9 +271,8 @@ Zone Pacific/Nauru 11:07:40 - LMT 1921 J # 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 -Rule NC 1997 max - Mar Sun>=1 2:00s 0 - -Rule NC 1997 max - Nov lastSun 2:00s 1:00 S +Rule NC 1996 only - Dec 1 2:00s 1:00 S +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 @@ -447,8 +447,8 @@ Zone Pacific/Wallis 12:15:20 - LMT 1901 # From Paul Eggert <eggert@twinsun.com> (1996-11-22): # A good source for time zone historical data outside the U.S. is -# Thomas G. Shanks, The International Atlas (3rd edition), -# San Diego: ACS Publications, Inc. (1991). +# Thomas G. Shanks, The International Atlas (4th edition), +# San Diego: ACS Publications, Inc. (1995). # # Gwillim Law <LAW@encmail.encompass.com> writes that a good source # for recent time zone data is the International Air Transport @@ -834,7 +834,7 @@ Zone Pacific/Wallis 12:15:20 - LMT 1901 # hour ahead of NSW time. # From Paul Eggert (1995-12-19): -# For Lord Howe we use Shanks through its time of publication (1991). +# For Lord Howe we use Shanks through 1991. # Lord Howe is part of NSW, so we'll guess it has used the same transition # times as NSW since 1991, even though Shanks writes that Lord Howe went # with Victoria when NSW and Victoria disagreed in 1982. =================================================================== RCS file: RCS/europe,v retrieving revision 1998.7 retrieving revision 1998.7.1.1 diff -p -u -r1998.7 -r1998.7.1.1 --- europe 1998/08/11 03:12:57 1998.7 +++ europe 1998/09/23 00:18:21 1998.7.1.1 @@ -6,8 +6,8 @@ # From Paul Eggert <eggert@twinsun.com> (1996-11-22): # A good source for time zone historical data outside the U.S. is -# Thomas G. Shanks, The International Atlas (3rd edition), -# San Diego: ACS Publications, Inc. (1991). +# Thomas G. Shanks, The International Atlas (4th edition), +# San Diego: ACS Publications, Inc. (1995). # # Gwillim Law <LAW@encmail.encompass.com> writes that a good source # for recent time zone data is the International Air Transport @@ -951,10 +951,14 @@ Rule Russia 1921 only - Feb 14 23:00 1:0 Rule Russia 1921 only - Mar 20 23:00 2:00 DS Rule Russia 1921 only - Sep 1 0:00 1:00 S Rule Russia 1921 only - Oct 1 0:00 0 - +# Act No.925 of the Council of Ministers of the USSR (1980-10-24): Rule Russia 1981 1984 - Apr 1 0:00 1:00 S Rule Russia 1981 1983 - Oct 1 0:00 0 - +# Act No.967 of the Council of Ministers of the USSR (1984-09-13), repeated in +# Act No.227 of the Council of Ministers of the USSR (1989-03-14): Rule Russia 1984 1991 - Sep lastSun 2:00s 0 - Rule Russia 1985 1991 - Mar lastSun 2:00s 1:00 S +# Rule Russia 1992 only - Mar lastSat 23:00 1:00 S Rule Russia 1992 only - Sep lastSat 23:00 0 - Rule Russia 1993 max - Mar lastSun 2:00s 1:00 S @@ -1056,15 +1060,17 @@ Zone Europe/Vienna 1:05:20 - LMT 1893 Ap 1:00 EU CE%sT # Belarus +# Transitions before 1991 are from Shanks (1995). # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Europe/Minsk 1:50:16 - LMT 1880 - 2:30:20 Russia %s 1919 Jul 1 2:00 - 3:00 Russia MSK/MSD 1922 Oct + 1:50 - MMT 1924 May 2 # Minsk Mean Time 2:00 - EET 1930 Jun 21 + 3:00 - MSK 1941 Jun 28 + 1:00 C-Eur CE%sT 1944 Jul 3 3:00 Russia MSK/MSD 1991 Mar 31 2:00s 2:00 1:00 EEST 1991 Sep 29 2:00s - 2:00 - EET 1992 Mar 29 0:00 - 2:00 1:00 EEST 1992 Sep 27 0:00 + 2:00 - EET 1992 Mar 29 2:00s + 2:00 1:00 EEST 1992 Sep 27 2:00s 2:00 Russia EE%sT # Belgium @@ -1244,7 +1250,8 @@ Zone Europe/Tallinn 1:39:00 - LMT 1880 1:00 C-Eur CE%sT 1944 Sep 22 3:00 Russia MSK/MSD 1989 Mar 26 2:00s 2:00 1:00 EEST 1989 Sep 24 2:00s - 2:00 C-Eur EE%sT + 2:00 C-Eur EE%sT 1998 + 2:00 EU EE%sT # Finland # See Sweden for when the Gregorian calendar was adopted. @@ -1570,14 +1577,45 @@ Link Europe/Rome Europe/Vatican Link Europe/Rome Europe/San_Marino # Latvia -# From Paul Eggert (1996-11-22): -# Rules after 1991 are by extension from Shanks. They contradict -# IATA SSIM (1992/1996), which claims Latvia uses W-Eur rules, but -# Peter Ilieve's relative writes that Latvia switched in September this year, -# so we'll assume that the old C-Eur-style rules still apply. + +# From Liene Kanepe <Liene_Kanepe@lm.gov.lv> (1998-09-17): + +# I asked about this matter Scientific Secretary of the Institute of Astronomy +# of The University of Latvia Dr. paed Mr. Ilgonis Vilks. I also searched the +# correct data in juridical acts and I found some juridical documents about +# changes in the counting of time in Latvia from 1981.... +# +# Act No.35 of the Council of Ministers of Latvian SSR of 1981-01-22 ... +# according to the Act No.925 of the Council of Ministers of USSR of 1980-10-24 +# ...: all year round the time of 2nd time zone + 1 hour, in addition turning +# the hands of the clock 1 hour forward on 1 April at 00:00 (GMT 31 March 21:00) +# and 1 hour backward on the 1 October at 00:00 (GMT 30 September 20:00). +# +# Act No.592 of the Council of Ministers of Latvian SSR of 1984-09-24 ... +# according to the Act No.967 of the Council of Ministers of USSR of 1984-09-13 +# ...: all year round the time of 2nd time zone + 1 hour, in addition turning +# the hands of the clock 1 hour forward on the last Sunday of March at 02:00 +# (GMT 23:00 on the previous day) and 1 hour backward on the last Sunday of +# September at 03:00 (GMT 23:00 on the previous day). +# +# Act No.81 of the Council of Ministers of Latvian SSR of 1989-03-22 ... +# according to the Act No.227 of the Council of Ministers of USSR of 1989-03-14 +# ...: since the last Sunday of March 1989 in Lithuanian SSR, Latvian SSR, +# Estonian SSR and Kaliningrad region of Russian Federation all year round the +# time of 2nd time zone (Moscow time minus one hour). On the territory of Latvia +# transition to summer time is performed on the last Sunday of March at 02:00 +# (GMT 00:00), turning the hands of the clock 1 hour forward. The end of +# daylight saving time is performed on the last Sunday of September at 03:00 +# (GMT 00:00), turning the hands of the clock 1 hour backward. Exception is +# 1989-03-26, when we must not turn the hands of the clock.... +# +# The Regulations of the Cabinet of Ministers of the Republic of Latvia of +# 1997-01-21 on transition to Summer time ... established the same order of +# daylight savings time settings as in the States of the European Union. + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule Latvia 1992 max - Mar lastSun 2:00s 1:00 S -Rule Latvia 1992 max - Sep lastSun 2:00s 0 - +Rule Latvia 1989 1996 - Mar lastSun 2:00s 1:00 S +Rule Latvia 1989 1996 - Sep lastSun 2:00s 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Europe/Riga 1:36:24 - LMT 1880 1:36:24 - RMT 1918 Apr 15 2:00 #Riga Mean Time @@ -1587,10 +1625,13 @@ Zone Europe/Riga 1:36:24 - LMT 1880 1:36:24 - RMT 1926 May 11 2:00 - EET 1940 Aug 5 3:00 - MSK 1941 Jul - 1:00 C-Eur CE%sT 1944 Aug 8 - 3:00 Russia MSK/MSD 1991 Mar 31 2:00s - 2:00 1:00 EEST 1991 Sep 29 2:00s - 2:00 Latvia EE%sT + 1:00 C-Eur CE%sT 1944 Oct 13 + # Shanks says 1944-08-08, but + # Riga fell to the Red Army on 1944-10-13. + 3:00 Russia MSK/MSD 1989 Mar lastSun 2:00s + 2:00 1:00 EEST 1989 Sep lastSun 2:00s + 2:00 Latvia EE%sT 1997 Jan 21 + 2:00 EU EE%sT # Liechtenstein # Zone NAME GMTOFF RULES FORMAT [UNTIL] @@ -1610,8 +1651,9 @@ Zone Europe/Vilnius 1:41:16 - LMT 1880 1:00 C-Eur CE%sT 1944 Aug 3:00 Russia MSK/MSD 1991 Mar 31 2:00s 2:00 1:00 EEST 1991 Sep 29 2:00s - 2:00 C-Eur EE%sT 1998 Mar 29 2:00s - 1:00 C-Eur CE%sT + 2:00 C-Eur EE%sT 1998 + 2:00 - EET 1998 Mar 29 1:00u + 1:00 EU CE%sT # From Paul Eggert (1996-11-22): # IATA SSIM (1992/1996) says Lithuania uses W-Eur rules, but since it is # known to be wrong about Estonia and Latvia, assume it's wrong here too. @@ -2262,8 +2304,8 @@ Rule Crimea 1921 only - Feb 14 23:00 1:0 Rule Crimea 1921 only - Mar 21 23:00 2:00 CDST Rule Crimea 1921 only - Sep 1 0:00 1:00 CST Rule Crimea 1921 only - Oct 1 0:00 0 NMT -Rule Crimea 1996 max - Mar lastSun 0:00u 1:00 - -Rule Crimea 1996 max - Oct lastSun 0:00u 0 - +Rule Crimea 1996 only - Mar lastSun 0:00u 1:00 - +Rule Crimea 1996 only - Oct lastSun 0:00u 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone Europe/Kiev 2:02:04 - LMT 1880 2:02:04 Ukraine %s 1924 May 2 @@ -2281,9 +2323,12 @@ Zone Europe/Simferopol 2:16:24 - LMT 188 # from Kiev to Moscow time sometime after the January 1994 elections. # For now, guess it changed Feb 1. 2:00 C-Eur EE%sT 1994 Feb -# From IATA SSIM (1994/1996), which also says that Kerch is still like Kiev. +# From IATA SSIM (1994/1997), which also says that Kerch is still like Kiev. 3:00 E-Eur MSK/MSD 1996 - 3:00 Crimea MSK/MSD +# IATA SSIM (1997-09) says Crimea switched to EET/EEST. +# Assume it happened in March by not changing the clocks. + 3:00 Crimea MSK/MSD 1997 Mar lastSun 1:00u + 2:00 EU EE%sT # Yugoslavia # Zone NAME GMTOFF RULES FORMAT [UNTIL] =================================================================== RCS file: RCS/northamerica,v retrieving revision 1998.5 retrieving revision 1998.5.1.1 diff -p -u -r1998.5 -r1998.5.1.1 --- northamerica 1998/05/28 13:56:16 1998.5 +++ northamerica 1998/09/23 00:18:21 1998.5.1.1 @@ -459,8 +459,8 @@ Link Pacific/Honolulu HST # From Paul Eggert <eggert@twinsun.com> (1996-11-22): # A good source for time zone historical data outside the US is -# Thomas G. Shanks, The International Atlas (3rd edition), -# San Diego: ACS Publications, Inc. (1991). +# Thomas G. Shanks, The International Atlas (4th edition), +# San Diego: ACS Publications, Inc. (1995). # # Gwillim Law <LAW@encmail.encompass.com> writes that a good source # for recent time zone data is the International Air Transport @@ -1002,6 +1002,12 @@ Rule BajaN 1950 1966 - Apr lastSun 2:00 Rule BajaN 1950 1961 - Sep lastSun 2:00 0 S Rule BajaN 1961 1966 - Oct lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] +# Quintana Roo +Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 1:12:42 + -6:00 - CST 1996 + -6:00 Mexico C%sT 1997 Oct lastSun 2:00 + -5:00 Mexico E%sT +# Central Mexico Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 -7:00 - MST 1927 Jun 10 23:00 -6:00 - CST 1930 Nov 15 @@ -1009,6 +1015,18 @@ Zone America/Mexico_City -6:36:36 - LMT -6:00 - CST 1931 Oct -7:00 - MST 1932 Mar 30 23:00 -6:00 Mexico C%sT +# Chihuahua +Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:44 + -7:00 - MST 1927 Jun 10 23:00 + -6:00 - CST 1930 Nov 15 + -7:00 - MST 1931 May 1 23:00 + -6:00 - CST 1931 Oct + -7:00 - MST 1932 Mar 30 23:00 + -6:00 - CST 1996 + -6:00 Mexico C%sT 1998 + -6:00 - CST 1998 Apr Sun>=1 3:00 + -7:00 Mexico M%sT +# S Baja California, Nayarit, Sinaloa, Sonora Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 -7:00 - MST 1927 Jun 10 23:00 -6:00 - CST 1930 Nov 15 @@ -1019,6 +1037,7 @@ Zone America/Mazatlan -7:05:40 - LMT 192 -7:00 - MST 1949 Jan 14 -8:00 - PST 1970 -7:00 Mexico M%sT +# N Baja California Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 -8:00 - PST 1927 Jun 10 23:00 -7:00 - MST 1930 Nov 16 @@ -1027,6 +1046,7 @@ Zone America/Tijuana -7:48:04 - LMT 1922 -8:00 BajaN P%sT 1967 Apr lastSun 2:00 -8:00 US P%sT 1996 -8:00 Mexico P%sT +# Baja California Zone America/Ensenada -7:46:28 - LMT 1922 Jan 1 0:13:32 -8:00 - PST 1927 Jun 10 23:00 -7:00 - MST 1930 Nov 16 @@ -1069,7 +1089,7 @@ Rule Barb 1979 only - Sep 30 2:00 0 S Rule Barb 1980 only - Sep 25 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Barbados -3:58:28 - LMT 1924 # Bridgetown - -3:58 - BMT 1932 # Bridgetown Mean Time + -3:58:28 - BMT 1932 # Bridgetown Mean Time -4:00 Barb A%sT # Belize @@ -1094,7 +1114,7 @@ Zone Atlantic/Bermuda -4:19:04 - LMT 193 # Cayman Is # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown - -5:07 - KMT 1912 Feb # Kingston Mean Time + -5:07:12 - KMT 1912 Feb # Kingston Mean Time -5:00 - EST # Costa Rica @@ -1150,10 +1170,13 @@ Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D -Rule Cuba 1990 max - Apr Sun>=1 0:00 1:00 D +Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S -Rule Cuba 1996 only - Oct Sun>=1 0:00s 0 S -Rule Cuba 1997 max - Oct Sun>=8 0:00s 0 S +Rule Cuba 1996 only - Oct 6 0:00s 0 S +Rule Cuba 1997 only - Oct 12 0:00s 0 S +Rule Cuba 1998 only - Mar 29 0:00 1:00 D +Rule Cuba 1998 max - Oct lastSun 0:00s 0 S +Rule Cuba 1999 max - Apr Sun>=1 0:00s 1:00 D # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Havana -5:29:28 - LMT 1890 @@ -1216,8 +1239,8 @@ Rule Haiti 1983 only - May 8 0:00 1:00 D Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S # Shanks says AT is 2:00, but IATA SSIM (1991/1996) says 1:00s. Go with IATA. -Rule Haiti 1988 max - Apr Sun>=1 1:00s 1:00 D -Rule Haiti 1988 max - Oct lastSun 1:00s 0 S +Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D +Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Port-au-Prince -4:49:20 - LMT 1890 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT @@ -1240,7 +1263,7 @@ Zone America/Tegucigalpa -5:48:52 - LMT # From Shanks (1991): # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Jamaica -5:07:12 - LMT 1890 # Kingston - -5:07 - KMT 1912 Feb # Kingston Mean Time + -5:07:12 - KMT 1912 Feb # Kingston Mean Time -5:00 - EST 1974 Jan 6 2:00 -5:00 US E%sT 1984 -5:00 - EST @@ -1310,12 +1333,12 @@ Zone America/Miquelon -3:44:40 - LMT 191 # St Vincent and the Grenadines # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown - -4:05 - KMT 1912 # Kingstown Mean Time + -4:04:56 - KMT 1912 # Kingstown Mean Time -4:00 - AST # Turks and Caicos -# From Paul Eggert (1996-11-22): -# Shanks says they use US DST rules, but IATA SSIM (1991/1996) +# From Paul Eggert (1998-08-06): +# Shanks says they use US DST rules, but IATA SSIM (1991/1998) # says they switch at midnight. Go with IATA SSIM. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule TC 1979 1986 - Apr lastSun 0:00 1:00 D @@ -1323,7 +1346,7 @@ Rule TC 1979 max - Oct lastSun 0:00 0 S Rule TC 1987 max - Apr Sun>=1 0:00 1:00 D # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Grand_Turk -4:44:32 - LMT 1890 - -5:07 - KMT 1912 Feb # Kingston Mean Time + -5:07:12 - KMT 1912 Feb # Kingston Mean Time -5:00 TC E%sT # British Virgin Is =================================================================== RCS file: RCS/southamerica,v retrieving revision 1998.3 retrieving revision 1998.3.1.1 diff -p -u -r1998.3 -r1998.3.1.1 --- southamerica 1998/02/28 17:32:26 1998.3 +++ southamerica 1998/09/23 00:18:21 1998.3.1.1 @@ -6,8 +6,8 @@ # From Paul Eggert <eggert@twinsun.com> (1996-11-22): # A good source for time zone historical data outside the U.S. is -# Thomas G. Shanks, The International Atlas (3rd edition), -# San Diego: ACS Publications, Inc. (1991). +# Thomas G. Shanks, The International Atlas (4th edition), +# San Diego: ACS Publications, Inc. (1995). # # Gwillim Law <LAW@encmail.encompass.com> writes that a good source # for recent time zone data is the International Air Transport @@ -310,6 +310,8 @@ Zone America/Fortaleza -2:34:00 - LMT 19 -3:00 - EST # # Alagoas, Sergipe, Tocantins +# IATA SSIM (1996/1998) keeps bouncing back and forth as to whether +# Alagoas and Sergipe observe DST. For now, continue to assume that they do. Zone America/Maceio -2:22:52 - LMT 1914 -3:00 - EST 1963 Dec 9 -3:00 Brazil E%sT 1990 Jul @@ -375,6 +377,7 @@ Zone Pacific/Easter -7:17:28 - LMT 1890 # Colombia # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule CO 1992 only - May 2 0:00 1:00 S +# Shanks (1995) estimates 1993-04-03 24:00 for this; go with IATA. Rule CO 1992 only - Dec 31 0:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Bogota -4:56:20 - LMT 1884 Mar 13 @@ -384,6 +387,10 @@ Zone America/Bogota -4:56:20 - LMT 1884 # no information; probably like America/Bogota # Curacao +# Shanks (1995) says that Bottom and Oranjestad have been at -4:00 since +# standard time was introduced on 1912-03-02; and that Kralendijk and Rincon +# used Kralendijk Mean Time (-4:33:08) from 1912-02-02 to 1965-01-01. +# This all predates our 1970 cutoff, though. # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Curacao -4:35:44 - LMT 1912 Feb 12 # Willemstad -4:30 - ANT 1965 # Netherlands Antilles Time @@ -458,9 +465,11 @@ Rule Para 1992 only - Oct 5 0:00 1:00 S Rule Para 1993 only - Mar 31 0:00 0 - Rule Para 1993 1995 - Oct 1 0:00 1:00 S Rule Para 1994 1995 - Feb lastSun 0:00 0 - -Rule Para 1996 max - Mar 1 0:00 0 - -Rule Para 1996 only - Oct 6 0:00 1:00 S -Rule Para 1997 max - Oct 1 0:00 1:00 S +Rule Para 1996 1998 - Mar 1 0:00 0 - +Rule Para 1996 max - Oct Sun>=1 0:00 1:00 S +# IATA SSIM (1998-02) claims that the 1999 switch will be on 02-27. +# Assume this is a typo, and that 02-28 was meant. +Rule Para 1999 max - Feb lastSun 0:00 0 - # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Asuncion -3:50:40 - LMT 1890 -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time =================================================================== RCS file: RCS/zone.tab,v retrieving revision 1.2.1.8 retrieving revision 1.2.1.8.1.2 diff -p -u -r1.2.1.8 -r1.2.1.8.1.2 --- zone.tab 1998/05/25 07:38:52 1.2.1.8 +++ zone.tab 1998/09/23 01:42:49 1.2.1.8.1.2 @@ -202,7 +202,7 @@ KP +3901+12545 Asia/Pyongyang KR +3733+12658 Asia/Seoul KW +2920+04759 Asia/Kuwait KY +1918-08123 America/Cayman -KZ +4315+07657 Asia/Alma-Ata east Kazakhstan +KZ +4315+07657 Asia/Almaty east Kazakhstan KZ +5017+05710 Asia/Aqtobe central Kazakhstan KZ +4431+05016 Asia/Aqtau west Kazakhstan LA +1758+10236 Asia/Vientiane @@ -236,8 +236,10 @@ MT +3554+01431 Europe/Malta MU -2010+05730 Indian/Mauritius MV +0410+07330 Indian/Maldives MW -1547+03500 Africa/Blantyre +MX +2105-08646 America/Cancun Eastern Time MX +1924-09909 America/Mexico_City Central Time -MX +2313-10625 America/Mazatlan Mountain Time +MX +2313-10625 America/Mazatlan Mountain Time - most locations +MX +2838-10605 America/Chihuahua Mountain Time - Chihuahua MX +3152-11637 America/Ensenada Pacific Time - most locations MX +3232-11701 America/Tijuana Pacific Time - north Baja California MY +0310+10142 Asia/Kuala_Lumpur peninsular Malaysia @@ -354,7 +356,8 @@ US +643004-1652423 America/Nome Alaska T US +515248-1763929 America/Adak Aleutian Islands US +211825-1575130 Pacific/Honolulu Hawaii UY -3453-05611 America/Montevideo -UZ +4120+06918 Asia/Tashkent +UZ +3940+06648 Asia/Samarkand west Uzbekistan +UZ +4120+06918 Asia/Tashkent east Uzbekistan VA +4154+01227 Europe/Vatican VC +1309-06114 America/St_Vincent VE +1030-06656 America/Caracas