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*** 138,149 ****
# made their calculations and set the time for the Horse Guards and Parliament,
# but now the stone is obscured by scrubwood and can only be seen by walking
# along the towpath within a few yards of it.'
#
# I have a one inch to one mile map of London and my estimate of the stone's
! # position is 51 degrees 28' 30" N, 0 degrees 18' 45" W. The longitude should
! # be within about +-2". The Ordnance Survey grid reference is TQ172761.
#
# [This yields GMTOFF = -0:01:15 for London LMT in the 18th century.]
# From Paul Eggert (1993-11-18):
#
--- 138,149 ----
# made their calculations and set the time for the Horse Guards and Parliament,
# but now the stone is obscured by scrubwood and can only be seen by walking
# along the towpath within a few yards of it.'
#
# I have a one inch to one mile map of London and my estimate of the stone's
! # position is 51° 28' 30" N, 0° 18' 45" W. The longitude should
! # be within about ±2". The Ordnance Survey grid reference is TQ172761.
#
# [This yields GMTOFF = -0:01:15 for London LMT in the 18th century.]
# From Paul Eggert (1993-11-18):
#
*** 179,189 ****
# New Zealand entomologist George Vernon Hudson (1867-1946),
# whose day job as a postal clerk led him to value
# after-hours daylight in which to pursue his research.
# In 1895 he presented a paper to the Wellington Philosophical Society
# that proposed a two-hour daylight-saving shift. See:
! # Hudson GV. On seasonal time-adjustment in countries south of lat. 30 deg.
# Transactions and Proceedings of the New Zealand Institute. 1895;28:734
# http://rsnz.natlib.govt.nz/volume/rsnz_28/rsnz_28_00_006110.html
# Although some interest was expressed in New Zealand, his proposal
# did not find its way into law and eventually it was almost forgotten.
#
--- 179,189 ----
# New Zealand entomologist George Vernon Hudson (1867-1946),
# whose day job as a postal clerk led him to value
# after-hours daylight in which to pursue his research.
# In 1895 he presented a paper to the Wellington Philosophical Society
# that proposed a two-hour daylight-saving shift. See:
! # Hudson GV. On seasonal time-adjustment in countries south of lat. 30°.
# Transactions and Proceedings of the New Zealand Institute. 1895;28:734
# http://rsnz.natlib.govt.nz/volume/rsnz_28/rsnz_28_00_006110.html
# Although some interest was expressed in New Zealand, his proposal
# did not find its way into law and eventually it was almost forgotten.
#
*** 529,543 ****
0:00 EU GMT/BST
Link Europe/London Europe/Jersey
Link Europe/London Europe/Guernsey
Link Europe/London Europe/Isle_of_Man
! # From Paul Eggert (2018-01-19):
# The following is like GB-Eire and EU, except with standard time in
! # summer and negative daylight saving time in winter.
! # Although currently commented out, this will need to become uncommented
! # once the ICU/OpenJDK workaround is removed; see below.
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
#Rule Eire 1971 only - Oct 31 2:00u -1:00 GMT
#Rule Eire 1972 1980 - Mar Sun>=16 2:00u 0 IST
#Rule Eire 1972 1980 - Oct Sun>=23 2:00u -1:00 GMT
#Rule Eire 1981 max - Mar lastSun 1:00u 0 IST
--- 529,557 ----
0:00 EU GMT/BST
Link Europe/London Europe/Jersey
Link Europe/London Europe/Guernsey
Link Europe/London Europe/Isle_of_Man
! # From Paul Eggert (2018-02-15):
! # In January 2018 we discovered that the negative SAVE values in the
! # Eire rules cause problems with tests for ICU:
! # https://mm.icann.org/pipermail/tz/2018-January/025825.html
! # and with tests for OpenJDK:
! # https://mm.icann.org/pipermail/tz/2018-January/025822.html
! #
! # To work around this problem, the build procedure can translate the
! # following data into two forms, one with negative SAVE values and the
! # other form with a traditional approximation for Irish time stamps
! # after 1971-10-31 02:00 UTC; although this approximation has tm_isdst
! # flags that are reversed, its UTC offsets are correct and this often
! # suffices. This source file currently uses only nonnegative SAVE
! # values, but this is intended to change and downstream code should
! # not rely on it.
! #
# The following is like GB-Eire and EU, except with standard time in
! # summer and negative daylight saving time in winter. It is for when
! # negative SAVE values are used.
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
#Rule Eire 1971 only - Oct 31 2:00u -1:00 GMT
#Rule Eire 1972 1980 - Mar Sun>=16 2:00u 0 IST
#Rule Eire 1972 1980 - Oct Sun>=23 2:00u -1:00 GMT
#Rule Eire 1981 max - Mar lastSun 1:00u 0 IST
*** 554,581 ****
0:00 1:00 IST 1946 Oct 6 2:00s
0:00 - GMT 1947 Mar 16 2:00s
0:00 1:00 IST 1947 Nov 2 2:00s
0:00 - GMT 1948 Apr 18 2:00s
0:00 GB-Eire GMT/IST 1968 Oct 27
! # From Paul Eggert (2018-01-18):
! # The next line should look like this:
# 1:00 Eire IST/GMT
! # However, in January 2018 we discovered that the Eire rules cause
! # problems with tests for ICU:
! # https://mm.icann.org/pipermail/tz/2018-January/025825.html
! # and with tests for OpenJDK:
! # https://mm.icann.org/pipermail/tz/2018-January/025822.html
! # To work around this problem, use a traditional approximation for
! # time stamps after 1971-10-31 02:00 UTC, to give ICU and OpenJDK
! # developers breathing room to fix bugs. This approximation has
! # correct UTC offsets, but results in tm_isdst flags are the reverse
! # of what they should be. This workaround is temporary and should be
! # removed reasonably soon.
1:00 - IST 1971 Oct 31 2:00u
0:00 GB-Eire GMT/IST 1996
0:00 EU GMT/IST
- # End of workaround for ICU and OpenJDK bugs.
###############################################################################
# Europe
--- 568,583 ----
0:00 1:00 IST 1946 Oct 6 2:00s
0:00 - GMT 1947 Mar 16 2:00s
0:00 1:00 IST 1947 Nov 2 2:00s
0:00 - GMT 1948 Apr 18 2:00s
0:00 GB-Eire GMT/IST 1968 Oct 27
! # The next line is for when negative SAVE values are used.
# 1:00 Eire IST/GMT
! # These three lines are for when SAVE values are always nonnegative.
1:00 - IST 1971 Oct 31 2:00u
0:00 GB-Eire GMT/IST 1996
0:00 EU GMT/IST
###############################################################################
# Europe
*** 1555,1579 ****
# From Paul Eggert (2014-11-22):
# The information below is taken from the 1988 Almanak; see
# http://www.almanak.hi.is/klukkan.html
#
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
! Rule Iceland 1917 1919 - Feb 19 23:00 1:00 S
Rule Iceland 1917 only - Oct 21 1:00 0 -
Rule Iceland 1918 1919 - Nov 16 1:00 0 -
! Rule Iceland 1921 only - Mar 19 23:00 1:00 S
Rule Iceland 1921 only - Jun 23 1:00 0 -
! Rule Iceland 1939 only - Apr 29 23:00 1:00 S
Rule Iceland 1939 only - Oct 29 2:00 0 -
! Rule Iceland 1940 only - Feb 25 2:00 1:00 S
Rule Iceland 1940 1941 - Nov Sun>=2 1:00s 0 -
! Rule Iceland 1941 1942 - Mar Sun>=2 1:00s 1:00 S
# 1943-1946 - first Sunday in March until first Sunday in winter
! Rule Iceland 1943 1946 - Mar Sun>=1 1:00s 1:00 S
Rule Iceland 1942 1948 - Oct Sun>=22 1:00s 0 -
# 1947-1967 - first Sunday in April until first Sunday in winter
! Rule Iceland 1947 1967 - Apr Sun>=1 1:00s 1:00 S
# 1949 and 1967 Oct transitions delayed by 1 week
Rule Iceland 1949 only - Oct 30 1:00s 0 -
Rule Iceland 1950 1966 - Oct Sun>=22 1:00s 0 -
Rule Iceland 1967 only - Oct 29 1:00s 0 -
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
--- 1557,1581 ----
# From Paul Eggert (2014-11-22):
# The information below is taken from the 1988 Almanak; see
# http://www.almanak.hi.is/klukkan.html
#
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
! Rule Iceland 1917 1919 - Feb 19 23:00 1:00 -
Rule Iceland 1917 only - Oct 21 1:00 0 -
Rule Iceland 1918 1919 - Nov 16 1:00 0 -
! Rule Iceland 1921 only - Mar 19 23:00 1:00 -
Rule Iceland 1921 only - Jun 23 1:00 0 -
! Rule Iceland 1939 only - Apr 29 23:00 1:00 -
Rule Iceland 1939 only - Oct 29 2:00 0 -
! Rule Iceland 1940 only - Feb 25 2:00 1:00 -
Rule Iceland 1940 1941 - Nov Sun>=2 1:00s 0 -
! Rule Iceland 1941 1942 - Mar Sun>=2 1:00s 1:00 -
# 1943-1946 - first Sunday in March until first Sunday in winter
! Rule Iceland 1943 1946 - Mar Sun>=1 1:00s 1:00 -
Rule Iceland 1942 1948 - Oct Sun>=22 1:00s 0 -
# 1947-1967 - first Sunday in April until first Sunday in winter
! Rule Iceland 1947 1967 - Apr Sun>=1 1:00s 1:00 -
# 1949 and 1967 Oct transitions delayed by 1 week
Rule Iceland 1949 only - Oct 30 1:00s 0 -
Rule Iceland 1950 1966 - Oct Sun>=22 1:00s 0 -
Rule Iceland 1967 only - Oct 29 1:00s 0 -
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
*** 2159,2177 ****
1:00 Poland CE%sT 1977
1:00 W-Eur CE%sT 1988
1:00 EU CE%sT
# Portugal
! #
# From Paul Eggert (2014-08-11), after a heads-up from Stephen Colebourne:
# According to a Portuguese decree (1911-05-26)
# https://dre.pt/application/dir/pdf1sdip/1911/05/12500/23132313.pdf
# Lisbon was at -0:36:44.68, but switched to GMT on 1912-01-01 at 00:00.
! # Round the old offset to -0:36:45. This agrees with Willett but disagrees
! # with Shanks, who says the transition occurred on 1911-05-24 at 00:00 for
! # Europe/Lisbon, Atlantic/Azores, and Atlantic/Madeira.
#
# From Rui Pedro Salgueiro (1992-11-12):
# Portugal has recently (September, 27) changed timezone
# (from WET to MET or CET) to harmonize with EEC.
#
# Martin Bruckmann (1996-02-29) reports via Peter Ilieve
--- 2161,2183 ----
1:00 Poland CE%sT 1977
1:00 W-Eur CE%sT 1988
1:00 EU CE%sT
# Portugal
!
# From Paul Eggert (2014-08-11), after a heads-up from Stephen Colebourne:
# According to a Portuguese decree (1911-05-26)
# https://dre.pt/application/dir/pdf1sdip/1911/05/12500/23132313.pdf
# Lisbon was at -0:36:44.68, but switched to GMT on 1912-01-01 at 00:00.
! # Round the old offset to -0:36:45. This agrees with Willett....
#
+ # From Michael Deckers (2018-02-15):
+ # article 5 [of the 1911 decree; Deckers's translation] ...:
+ # These dispositions shall enter into force at the instant at which,
+ # according to the 2nd article, the civil day January 1, 1912 begins,
+ # all clocks therefore having to be advanced or set back correspondingly ...
+
# From Rui Pedro Salgueiro (1992-11-12):
# Portugal has recently (September, 27) changed timezone
# (from WET to MET or CET) to harmonize with EEC.
#
# Martin Bruckmann (1996-02-29) reports via Peter Ilieve
*** 2250,2269 ****
Rule Port 1981 1982 - Mar lastSun 1:00s 1:00 S
Rule Port 1983 only - Mar lastSun 2:00s 1:00 S
#
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Europe/Lisbon -0:36:45 - LMT 1884
! -0:36:45 - LMT 1912 Jan 1 # Lisbon Mean Time
0:00 Port WE%sT 1966 Apr 3 2:00
1:00 - CET 1976 Sep 26 1:00
0:00 Port WE%sT 1983 Sep 25 1:00s
0:00 W-Eur WE%sT 1992 Sep 27 1:00s
1:00 EU CE%sT 1996 Mar 31 1:00u
0:00 EU WE%sT
# This Zone can be simplified once we assume zic %z.
Zone Atlantic/Azores -1:42:40 - LMT 1884 # Ponta Delgada
! -1:54:32 - HMT 1912 Jan 1 # Horta Mean Time
-2:00 Port -02/-01 1942 Apr 25 22:00s
-2:00 Port +00 1942 Aug 15 22:00s
-2:00 Port -02/-01 1943 Apr 17 22:00s
-2:00 Port +00 1943 Aug 28 22:00s
-2:00 Port -02/-01 1944 Apr 22 22:00s
--- 2256,2275 ----
Rule Port 1981 1982 - Mar lastSun 1:00s 1:00 S
Rule Port 1983 only - Mar lastSun 2:00s 1:00 S
#
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Europe/Lisbon -0:36:45 - LMT 1884
! -0:36:45 - LMT 1912 Jan 1 0:00u # Lisbon MT
0:00 Port WE%sT 1966 Apr 3 2:00
1:00 - CET 1976 Sep 26 1:00
0:00 Port WE%sT 1983 Sep 25 1:00s
0:00 W-Eur WE%sT 1992 Sep 27 1:00s
1:00 EU CE%sT 1996 Mar 31 1:00u
0:00 EU WE%sT
# This Zone can be simplified once we assume zic %z.
Zone Atlantic/Azores -1:42:40 - LMT 1884 # Ponta Delgada
! -1:54:32 - HMT 1912 Jan 1 2:00u # Horta MT
-2:00 Port -02/-01 1942 Apr 25 22:00s
-2:00 Port +00 1942 Aug 15 22:00s
-2:00 Port -02/-01 1943 Apr 17 22:00s
-2:00 Port +00 1943 Aug 28 22:00s
-2:00 Port -02/-01 1944 Apr 22 22:00s
*** 2275,2285 ****
-1:00 W-Eur -01/+00 1992 Sep 27 1:00s
0:00 EU WE%sT 1993 Mar 28 1:00u
-1:00 EU -01/+00
# This Zone can be simplified once we assume zic %z.
Zone Atlantic/Madeira -1:07:36 - LMT 1884 # Funchal
! -1:07:36 - FMT 1912 Jan 1 # Funchal Mean Time
-1:00 Port -01/+00 1942 Apr 25 22:00s
-1:00 Port +01 1942 Aug 15 22:00s
-1:00 Port -01/+00 1943 Apr 17 22:00s
-1:00 Port +01 1943 Aug 28 22:00s
-1:00 Port -01/+00 1944 Apr 22 22:00s
--- 2281,2291 ----
-1:00 W-Eur -01/+00 1992 Sep 27 1:00s
0:00 EU WE%sT 1993 Mar 28 1:00u
-1:00 EU -01/+00
# This Zone can be simplified once we assume zic %z.
Zone Atlantic/Madeira -1:07:36 - LMT 1884 # Funchal
! -1:07:36 - FMT 1912 Jan 1 1:00u # Funchal MT
-1:00 Port -01/+00 1942 Apr 25 22:00s
-1:00 Port +01 1942 Aug 15 22:00s
-1:00 Port -01/+00 1943 Apr 17 22:00s
-1:00 Port +01 1943 Aug 28 22:00s
-1:00 Port -01/+00 1944 Apr 22 22:00s
*** 2613,2629 ****
# should be. For now, sweep this under the rug and just document the
# time in Moscow.
# From Vladimir Karpinsky (2014-07-08):
# 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 ... 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 =
# 2:31:19 ...
#
# From Paul Eggert (2014-07-08):
# Milne does not list Moscow, but suggests that its time might be listed in
--- 2619,2635 ----
# should be. For now, sweep this under the rug and just document the
# time in Moscow.
# From Vladimir Karpinsky (2014-07-08):
# LMT in Moscow (before Jul 3, 1916) is 2:30:17, that was defined by Moscow
! # Observatory (coordinates: 55° 45' 29.70", 37° 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 ... 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° 46' 18.70", 30° 19' 40.70") so 30° 19' 40.70" >
# 2h01m18.7s = 2:01:19. LMT Moscow = LMT St.Petersburg + 30m 2:01:19 + 0:30 =
# 2:31:19 ...
#
# From Paul Eggert (2014-07-08):
# Milne does not list Moscow, but suggests that its time might be listed in
*** 3448,3458 ****
# From the beginning of 1879 (that is 01-01 00:00) the time for all
# places in the country is "the mean solar time for the meridian at
# three degrees, or twelve minutes of time, to the west of the
# meridian of the Observatory of Stockholm". The law is dated 1878-05-31.
#
! # The observatory at that time had the meridian 18 degrees 03' 30"
# eastern longitude = 01:12:14 in time. Less 12 minutes gives the
# national standard time as 01:00:14 ahead of GMT....
#
# About the beginning of CET in Sweden. The lawtext ("Svensk
# författningssamling 1899, no 44") states, that "from the beginning
--- 3454,3464 ----
# From the beginning of 1879 (that is 01-01 00:00) the time for all
# places in the country is "the mean solar time for the meridian at
# three degrees, or twelve minutes of time, to the west of the
# meridian of the Observatory of Stockholm". The law is dated 1878-05-31.
#
! # The observatory at that time had the meridian 18° 03' 30"
# eastern longitude = 01:12:14 in time. Less 12 minutes gives the
# national standard time as 01:00:14 ahead of GMT....
#
# About the beginning of CET in Sweden. The lawtext ("Svensk
# författningssamling 1899, no 44") states, that "from the beginning
*** 3552,3562 ****
# To represent this, an extra zone would be needed.
#
# From Alois Treindl (2013-09-11):
# The Federal regulations say
# https://www.admin.ch/opc/de/classified-compilation/20071096/index.html
! # ... the meridian for Bern mean time ... is 7 degrees 26' 22.50".
# Expressed in time, it is 0h29m45.5s.
# From Pierre-Yves Berger (2013-09-11):
# the "Circulaire du conseil fédéral" (December 11 1893)
# http://www.amtsdruckschriften.bar.admin.ch/viewOrigDoc.do?id=10071353
--- 3558,3568 ----
# To represent this, an extra zone would be needed.
#
# From Alois Treindl (2013-09-11):
# The Federal regulations say
# https://www.admin.ch/opc/de/classified-compilation/20071096/index.html
! # ... the meridian for Bern mean time ... is 7° 26' 22.50".
# Expressed in time, it is 0h29m45.5s.
# From Pierre-Yves Berger (2013-09-11):
# the "Circulaire du conseil fédéral" (December 11 1893)
# http://www.amtsdruckschriften.bar.admin.ch/viewOrigDoc.do?id=10071353
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