From 3c0c83726c1746c77d9b3ebca085d9a041d6f6e7 Mon Sep 17 00:00:00 2001 From: Paul Eggert Date: Fri, 8 Aug 2014 00:54:55 -0700 Subject: [PATCH] Adjust pre-1926 Russian UTC offsets as per Byalokoz 1919. (Thanks to Vladimir Karpinsky.) * asia (Asia/Tbilisi, Asia/Samarkand): * europe (Europe/Riga, Europe/Samara, Asia/Yekaterinburg, Asia/Omsk) (Asia/Krasnoyarsk, Asia/Irkutsk, Asia/Yakutsk, Asia/Vladivostok): Match Byalokoz 1919 better. * NEWS: Document the above. --- NEWS | 12 ++++++++++++ asia | 15 ++++++++++---- europe | 70 ++++++++++++++++++++++++++++++++++++++++++++++-------------------- 3 files changed, 72 insertions(+), 25 deletions(-) diff --git a/NEWS b/NEWS index 5a8b0cc..dddfd84 100644 --- a/NEWS +++ b/NEWS @@ -1,5 +1,17 @@ News for the tz database +Unreleased, experimental changes + + Changes affecting past time stamps + + Time in Russia or the USSR before 1926 or so has been corrected by + a few seconds in the following zones: Asia/Irkutsk, + Asia/Krasnoyarsk, Asia/Omsk, Asia/Samarkand, Asia/Tbilisi, + Asia/Vladivostok, Asia/Yakutsk, Europe/Riga, Europe/Samara. For + Asia/Yekaterinburg the correction is a few minutes. (Thanks to + Vladimir Karpinsky.) + + Release 2014f - 2014-08-05 17:42:36 -0700 Changes affecting future time stamps diff --git a/asia b/asia index 97b2030..081b2b0 100644 --- a/asia +++ b/asia @@ -28,6 +28,10 @@ # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 # . # +# For Russian data circa 1919, a source is: +# Byalokoz EL. New Counting of Time in Russia since July 1, 1919. +# (See the 'europe' file for a fuller citation.) +# # A reliable and entertaining source about time zones is # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). # @@ -823,11 +827,13 @@ Link Asia/Nicosia Europe/Nicosia # I don't know what can be done, especially knowing that some years ago our # DST rules where changed THREE TIMES during one month. -# Milne says Tbilisi (Tiflis) time was 2:59:05.7; round to nearest.) +# Milne 1899 says Tbilisi (Tiflis) time was 2:59:05.7. +# Byalokoz 1919 says Georgia was 2:59:11. +# Go with Byalokoz. # Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Asia/Tbilisi 2:59:06 - LMT 1880 - 2:59:06 - TBMT 1924 May 2 # Tbilisi Mean Time +Zone Asia/Tbilisi 2:59:11 - LMT 1880 + 2:59:11 - TBMT 1924 May 2 # Tbilisi Mean Time 3:00 - TBIT 1957 Mar # Tbilisi Time 4:00 RussiaAsia TBI%sT 1991 Mar 31 2:00s 3:00 1:00 TBIST 1991 Apr 9 # independence @@ -2744,8 +2750,9 @@ Zone Asia/Dubai 3:41:12 - LMT 1920 4:00 - GST # Uzbekistan +# Byalokoz 1919 says Uzbekistan was 4:27:53. # Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Asia/Samarkand 4:27:12 - LMT 1924 May 2 +Zone Asia/Samarkand 4:27:53 - 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 diff --git a/europe b/europe index 97b9f63..2e39269 100644 --- a/europe +++ b/europe @@ -38,6 +38,16 @@ # may be sent to Mr. John Milne, Royal Geographical Society, # Savile Row, London." Nowadays please email them to tz@iana.org. # +# Byalokoz EL. New Counting of Time in Russia since July 1, 1919. +# This Russian-language source was consulted by Vladimir Karpinsky; see +# http://mm.icann.org/pipermail/tz/2014-August/021320.html +# The full Russian citation is: +# Бялокоз, Евгений Людвигович. Новый счет времени в течении суток +# введенный декретом Совета народных комиссаров для всей России с 1-го +# июля 1919 г. / Изд. 2-е Междуведомственной комиссии. - Петроград: +# Десятая гос. тип., 1919. +# http://resolver.gpntb.ru/purl?docushare/dsweb/Get/Resource-2011/Byalokoz__E.L.__Novyy__schet__vremeni__v__techenie__sutok__izd__2(1).pdf +# # Brazil's Divisão Serviço da Hora (DSHO), # History of Summer Time # @@ -1549,15 +1559,17 @@ Link Europe/Rome Europe/San_Marino Rule Latvia 1989 1996 - Mar lastSun 2:00s 1:00 S Rule Latvia 1989 1996 - Sep lastSun 2:00s 0 - -# Milne says Riga time was 1:36:28 (Polytechnique House time). +# Milne 1899 says Riga was 1:36:28 (Polytechnique House time). +# Byalokoz 1919 says Latvia was 1:36:34. +# Go with Byalokoz. # Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Europe/Riga 1:36:28 - LMT 1880 - 1:36:28 - RMT 1918 Apr 15 2:00 #Riga Mean Time - 1:36:28 1:00 LST 1918 Sep 16 3:00 #Latvian Summer - 1:36:28 - RMT 1919 Apr 1 2:00 - 1:36:28 1:00 LST 1919 May 22 3:00 - 1:36:28 - RMT 1926 May 11 +Zone Europe/Riga 1:36:34 - LMT 1880 + 1:36:34 - RMT 1918 Apr 15 2:00 #Riga Mean Time + 1:36:34 1:00 LST 1918 Sep 16 3:00 #Latvian Summer + 1:36:34 - RMT 1919 Apr 1 2:00 + 1:36:34 1:00 LST 1919 May 22 3:00 + 1:36:34 - RMT 1926 May 11 2:00 - EET 1940 Aug 5 3:00 - MSK 1941 Jul 1:00 C-Eur CE%sT 1944 Oct 13 @@ -2274,9 +2286,9 @@ Zone Europe/Kaliningrad 1:22:00 - LMT 1893 Apr # LMT in Moscow (before Jul 3, 1916) is 2:30:17, that was defined by Moscow # Observatory (coordinates: 55 deg. 45'29.70", 37 deg. 34'05.30").... # LMT in Moscow since Jul 3, 1916 is 2:31:01 as a result of new standard. -# (The info is from the book by Byalokoz E.L. New Counting of Time in Russia -# since July 1, 1919, p. 18.) The time in St. Petersburg as capital of Russia -# was defined by Pulkov observatory, near St. Petersburg. In 1916 LMT Moscow +# (The info is from the book by Byalokoz ... p. 18.) +# The time in St. Petersburg as capital of Russia was defined by +# Pulkov observatory, near St. Petersburg. In 1916 LMT Moscow # was synchronized with LMT St. Petersburg (+30 minutes), (Pulkov observatory # coordinates: 59 deg. 46'18.70", 30 deg. 19'40.70") so 30 deg. 19'40.70" > # 2h01m18.7s = 2:01:19. LMT Moscow = LMT St.Petersburg + 30m 2:01:19 + 0:30 = @@ -2371,7 +2383,9 @@ Zone Europe/Volgograd 2:57:40 - LMT 1920 Jan 3 # 18 RU-UD Udmurt Republic # 63 RU-SAM Samara Oblast -Zone Europe/Samara 3:20:36 - LMT 1919 Jul 1 2:00 +# Byalokoz 1919 says Samara was 3:20:20. + +Zone Europe/Samara 3:20:20 - LMT 1919 Jul 1 2:00 3:00 - SAMT 1930 Jun 21 4:00 - SAMT 1935 Jan 27 4:00 Russia KUY%sT 1989 Mar 26 2:00s # Kuybyshev @@ -2398,9 +2412,13 @@ Zone Europe/Samara 3:20:36 - LMT 1919 Jul 1 2:00 # Note: Effective 2005-12-01, (59) Perm Oblast and (81) Komi-Permyak # Autonomous Okrug merged to form (90, RU-PER) Perm Krai. -# Milne says Yekaterinburg time was 4:02:32.9; round to nearest. +# Milne says Yekaterinburg was 4:02:32.9; round to nearest. +# Byalokoz 1919 says its provincial time was based on Perm, at 3:45:05. +# Assume it switched on 1916-07-03, the time of the new standard. +# The 1919 and 1930 transitions are from Shanks. -Zone Asia/Yekaterinburg 4:02:33 - LMT 1919 Jul 15 4:00 +Zone Asia/Yekaterinburg 4:02:33 - LMT 1916 Jul 3 + 3:45:05 - PMT 1919 Jul 15 4:00 4:00 - SVET 1930 Jun 21 # Sverdlovsk Time 5:00 Russia SVE%sT 1991 Mar 31 2:00s 4:00 Russia SVE%sT 1992 Jan 19 2:00s @@ -2415,7 +2433,9 @@ Zone Asia/Yekaterinburg 4:02:33 - LMT 1919 Jul 15 4:00 # 22 RU-ALT Altai Krai # 55 RU-OMS Omsk Oblast -Zone Asia/Omsk 4:53:36 - LMT 1919 Nov 14 +# Byalokoz 1919 says Omsk was 4:53:30. + +Zone Asia/Omsk 4:53:30 - LMT 1919 Nov 14 5:00 - OMST 1930 Jun 21 # Omsk Time 6:00 Russia OMS%sT 1991 Mar 31 2:00s 5:00 Russia OMS%sT 1992 Jan 19 2:00s @@ -2491,7 +2511,9 @@ Zone Asia/Novokuznetsk 5:48:48 - NMT 1920 Jan 6 # Note: Effective 2007-01-01, (88) Evenk Autonomous Okrug and (84) Taymyr # Autonomous Okrug were merged into (24, RU-KYA) Krasnoyarsk Krai. -Zone Asia/Krasnoyarsk 6:11:20 - LMT 1920 Jan 6 +# Byalokoz 1919 says Krasnoyarsk was 6:11:26. + +Zone Asia/Krasnoyarsk 6:11:26 - LMT 1920 Jan 6 6:00 - KRAT 1930 Jun 21 # Krasnoyarsk Time 7:00 Russia KRA%sT 1991 Mar 31 2:00s 6:00 Russia KRA%sT 1992 Jan 19 2:00s @@ -2508,10 +2530,12 @@ Zone Asia/Krasnoyarsk 6:11:20 - LMT 1920 Jan 6 # Note: Effective 2008-01-01, (85) Ust-Orda Buryat Autonomous Okrug was # merged into (38, RU-IRK) Irkutsk Oblast. -# Milne says Irkutsk time was 6:57:15. +# Milne 1899 says Irkutsk was 6:57:15. +# Byalokoz 1919 says Irkutsk was 6:57:05. +# Go with Byalokoz. -Zone Asia/Irkutsk 6:57:15 - LMT 1880 - 6:57:15 - IMT 1920 Jan 25 # Irkutsk Mean Time +Zone Asia/Irkutsk 6:57:05 - LMT 1880 + 6:57:05 - IMT 1920 Jan 25 # Irkutsk Mean Time 7:00 - IRKT 1930 Jun 21 # Irkutsk Time 8:00 Russia IRK%sT 1991 Mar 31 2:00s 7:00 Russia IRK%sT 1992 Jan 19 2:00s @@ -2570,7 +2594,9 @@ Zone Asia/Chita 7:33:52 - LMT 1919 Dec 15 # Since the surrounding districts of Sakha are all YAKT, assume this is, too. # Also assume its history has been the same as the rest of Asia/Yakutsk. -Zone Asia/Yakutsk 8:38:40 - LMT 1919 Dec 15 +# Byalokoz 1919 says Yakutsk was 8:38:58. + +Zone Asia/Yakutsk 8:38:58 - LMT 1919 Dec 15 8:00 - YAKT 1930 Jun 21 # Yakutsk Time 9:00 Russia YAK%sT 1991 Mar 31 2:00s 8:00 Russia YAK%sT 1992 Jan 19 2:00s @@ -2589,9 +2615,11 @@ Zone Asia/Yakutsk 8:38:40 - LMT 1919 Dec 15 # 14-09 **** Verkhoyansky District # 14-31 **** Ust-Yansky District -# Milne says Vladivostok time was 8:47:33.5; round to nearest. +# Milne 1899 says Vladivostok was 8:47:33.5. +# Byalokoz 1919 says Vladivostok was 8:47:31. +# Go with Byalokoz. -Zone Asia/Vladivostok 8:47:34 - LMT 1922 Nov 15 +Zone Asia/Vladivostok 8:47:31 - LMT 1922 Nov 15 9:00 - VLAT 1930 Jun 21 # Vladivostok Time 10:00 Russia VLA%sT 1991 Mar 31 2:00s 9:00 Russia VLA%sT 1992 Jan 19 2:00s -- 1.9.1