[tz] Correct time in Russia before 1927 or so
Paul Eggert
eggert at cs.ucla.edu
Fri Aug 8 08:00:41 UTC 2014
Thanks for the info. I installed the attached proposed patch into the
experimental repository on Github; I hope it captures the data you reported.
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From 3c0c83726c1746c77d9b3ebca085d9a041d6f6e7 Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert at cs.ucla.edu>
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
# <http://www.jstor.org/stable/1774359>.
#
+# 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 at 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
# <http://pcdsh01.on.br/HISTHV.htm>
@@ -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
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