proposed tz patches for post-1991 Iran, 1930s Soviet week, spelling
Paul Eggert
eggert at twinsun.com
Wed Dec 18 07:07:58 UTC 1996
Rich Wales suggested that Iran's daylight-saving rules correspond to
the Persian calendar and I found another expert source who agrees.
This clarifies the daylight saving rules for Iran (and points out what
appear to be minor errors in the IATA SSIM).
Here's a patch embodying his suggestion, along with a better
explanation of the Soviet week from 1929 through 1940 thanks to Chris
Carrier, and some miscellaneous spelling fixes (including one fix to a
message in `zic').
===================================================================
RCS file: RCS/zic.c,v
retrieving revision 1996.14
retrieving revision 1996.14.1.1
diff -c -r1996.14 -r1996.14.1.1
*** zic.c 1996/12/16 14:42:02 1996.14
--- zic.c 1996/12/18 06:42:29 1996.14.1.1
***************
*** 1697,1703 ****
(void) strcpy(startbuf, zp->z_format);
eat(zp->z_filename, zp->z_linenum);
if (*startbuf == '\0')
! error(_("can't determine time zone abbrevation to use just after until time"));
else addtt(starttime,
addtype(startoff, startbuf,
startoff != zp->z_gmtoff,
--- 1697,1703 ----
(void) strcpy(startbuf, zp->z_format);
eat(zp->z_filename, zp->z_linenum);
if (*startbuf == '\0')
! error(_("can't determine time zone abbreviation to use just after until time"));
else addtt(starttime,
addtype(startoff, startbuf,
startoff != zp->z_gmtoff,
===================================================================
RCS file: RCS/asia,v
retrieving revision 1996.13
retrieving revision 1996.13.1.1
diff -c -r1996.13 -r1996.13.1.1
*** asia 1996/11/24 01:07:37 1996.13
--- asia 1996/12/18 06:42:29 1996.13.1.1
***************
*** 354,359 ****
--- 354,379 ----
9:00 - JAYT
# Iran
+ # From Paul Eggert (1996-12-17), following up a suggestion by Rich Wales:
+ # Ahmad Alavi <URL:http://tehran.stanford.edu/Iran_Lib/Calendar/taghveem.txt>
+ # (1993-08-04) writes ``Daylight saving time in Iran starts from the first day
+ # of Farvardin and ends the first day of Mehr.'' This disagrees with the SSIM:
+ #
+ # DST start DST end
+ # year SSIM Alavi SSIM Alavi
+ # 1991 05-03!= 03-21 09-20!= 09-23
+ # 1992 03-22!= 03-21 09-23 09-23
+ # 1993 03-21 03-21 09-23 09-23
+ # 1994 03-21 03-21 09-22!= 09-23
+ # 1995 03-21 03-21 09-22!= 09-23
+ # 1996 03-21!= 03-20 09-21!= 09-22
+ # 1997 03-21 03-21 09-21!= 09-23
+ #
+ # Go with Alavi starting with 1992.
+ # I used Ed Reingold's cal-persia in GNU Emacs 19.34 to compute Persian dates.
+ # The Persian calendar is based on the sun, and dates after around 2050
+ # are approximate; stop after 2037 when 32-bit time_t's overflow.
+ #
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Iran 1978 1980 - Mar 21 0:00 1:00 S
Rule Iran 1978 only - Oct 21 0:00 0 -
***************
*** 361,371 ****
Rule Iran 1980 only - Sep 23 0:00 0 -
Rule Iran 1991 only - May 3 0:00s 1:00 S
Rule Iran 1991 only - Sep 20 0:00s 0 -
! Rule Iran 1992 only - Mar 22 0:00 1:00 S
! Rule Iran 1992 1993 - Sep 23 0:00 0 -
! Rule Iran 1993 max - Mar 21 0:00 1:00 S
! Rule Iran 1994 1995 - Sep 22 0:00 0 -
! Rule Iran 1996 max - Sep 21 0:00 0 -
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Tehran 3:25:44 - LMT 1916
3:25:44 - TMT 1946 # Tehran Mean Time
--- 381,430 ----
Rule Iran 1980 only - Sep 23 0:00 0 -
Rule Iran 1991 only - May 3 0:00s 1:00 S
Rule Iran 1991 only - Sep 20 0:00s 0 -
! Rule Iran 1992 1995 - Mar 21 0:00 1:00 S
! Rule Iran 1992 1995 - Sep 23 0:00 0 -
! Rule Iran 1996 only - Mar 20 0:00 1:00 S
! Rule Iran 1996 only - Sep 22 0:00 0 -
! Rule Iran 1997 1999 - Mar 21 0:00 1:00 S
! Rule Iran 1997 1999 - Sep 23 0:00 0 -
! Rule Iran 2000 only - Mar 20 0:00 1:00 S
! Rule Iran 2000 only - Sep 22 0:00 0 -
! Rule Iran 2001 2003 - Mar 21 0:00 1:00 S
! Rule Iran 2001 2003 - Sep 23 0:00 0 -
! Rule Iran 2004 only - Mar 20 0:00 1:00 S
! Rule Iran 2004 only - Sep 22 0:00 0 -
! Rule Iran 2005 2007 - Mar 21 0:00 1:00 S
! Rule Iran 2005 2007 - Sep 23 0:00 0 -
! Rule Iran 2008 only - Mar 20 0:00 1:00 S
! Rule Iran 2008 only - Sep 22 0:00 0 -
! Rule Iran 2009 2011 - Mar 21 0:00 1:00 S
! Rule Iran 2009 2011 - Sep 23 0:00 0 -
! Rule Iran 2012 only - Mar 20 0:00 1:00 S
! Rule Iran 2012 only - Sep 22 0:00 0 -
! Rule Iran 2013 2015 - Mar 21 0:00 1:00 S
! Rule Iran 2013 2015 - Sep 23 0:00 0 -
! Rule Iran 2016 only - Mar 20 0:00 1:00 S
! Rule Iran 2016 only - Sep 22 0:00 0 -
! Rule Iran 2017 2019 - Mar 21 0:00 1:00 S
! Rule Iran 2017 2019 - Sep 23 0:00 0 -
! Rule Iran 2020 only - Mar 20 0:00 1:00 S
! Rule Iran 2020 only - Sep 22 0:00 0 -
! Rule Iran 2021 2023 - Mar 21 0:00 1:00 S
! Rule Iran 2021 2023 - Sep 23 0:00 0 -
! Rule Iran 2024 2025 - Mar 20 0:00 1:00 S
! Rule Iran 2024 2025 - Sep 22 0:00 0 -
! Rule Iran 2026 2027 - Mar 21 0:00 1:00 S
! Rule Iran 2026 2027 - Sep 23 0:00 0 -
! Rule Iran 2028 2029 - Mar 20 0:00 1:00 S
! Rule Iran 2028 2029 - Sep 22 0:00 0 -
! Rule Iran 2030 2031 - Mar 21 0:00 1:00 S
! Rule Iran 2030 2031 - Sep 23 0:00 0 -
! Rule Iran 2032 2033 - Mar 20 0:00 1:00 S
! Rule Iran 2032 2033 - Sep 22 0:00 0 -
! Rule Iran 2034 2035 - Mar 21 0:00 1:00 S
! Rule Iran 2034 2035 - Sep 23 0:00 0 -
! Rule Iran 2036 2037 - Mar 20 0:00 1:00 S
! Rule Iran 2036 2037 - Sep 22 0:00 0 -
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Tehran 3:25:44 - LMT 1916
3:25:44 - TMT 1946 # Tehran Mean Time
***************
*** 492,498 ****
#
# ftp://ftp.huji.ac.il/pub/misc/timezones/announcements/1996-1998.ps.gz
#
! # Emptor Caveat: The dates for the years 1996-1998 were originally announced
# on 1995-08-31, by the previous Minister of Interior. The new Minister
# of Interior changed the dates on 1996-01-01, to take into account the
# desires of certain portions of Israeli society (the next election is in the
--- 551,557 ----
#
# ftp://ftp.huji.ac.il/pub/misc/timezones/announcements/1996-1998.ps.gz
#
! # Caveat emptor: The dates for the years 1996-1998 were originally announced
# on 1995-08-31, by the previous Minister of Interior. The new Minister
# of Interior changed the dates on 1996-01-01, to take into account the
# desires of certain portions of Israeli society (the next election is in the
===================================================================
RCS file: RCS/australasia,v
retrieving revision 1996.13
retrieving revision 1996.13.1.2
diff -c -r1996.13 -r1996.13.1.2
*** australasia 1996/11/24 01:07:37 1996.13
--- australasia 1996/12/18 06:59:16 1996.13.1.2
***************
*** 48,62 ****
# so use Lindeman.
#
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
! Rule QL 1989 1991 - Oct lastSun 2:00s 1:00 -
! Rule QL 1990 1992 - Mar Sun>=1 2:00s 0 -
Rule Holiday 1989 1993 - Oct lastSun 2:00s 1:00 -
Rule Holiday 1990 1994 - Mar Sun>=1 2:00s 0 -
Zone Australia/Brisbane 10:12:08 - LMT 1895
10:00 - EST 1917 Jan 1 0:01
10:00 Aus EST 1971 Oct lastSun 2:00s
10:00 1:00 EST 1972 Feb lastSun 2:00s
! 10:00 QL EST
Zone Australia/Lindeman 9:55:56 - LMT 1895
10:00 - EST 1917 Jan 1 0:01
10:00 Aus EST 1971 Oct lastSun 2:00s
--- 48,62 ----
# so use Lindeman.
#
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
! Rule AQ 1989 1991 - Oct lastSun 2:00s 1:00 -
! Rule AQ 1990 1992 - Mar Sun>=1 2:00s 0 -
Rule Holiday 1989 1993 - Oct lastSun 2:00s 1:00 -
Rule Holiday 1990 1994 - Mar Sun>=1 2:00s 0 -
Zone Australia/Brisbane 10:12:08 - LMT 1895
10:00 - EST 1917 Jan 1 0:01
10:00 Aus EST 1971 Oct lastSun 2:00s
10:00 1:00 EST 1972 Feb lastSun 2:00s
! 10:00 AQ EST
Zone Australia/Lindeman 9:55:56 - LMT 1895
10:00 - EST 1917 Jan 1 0:01
10:00 Aus EST 1971 Oct lastSun 2:00s
***************
*** 339,345 ****
9:00 - PWT # Palau Time
# Palmyra
! # uninhabited since World War II; was probably like Pacific/Kiritmati
# Papua New Guinea
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
--- 339,345 ----
9:00 - PWT # Palau Time
# Palmyra
! # uninhabited since World War II; was probably like Pacific/Kiritimati
# Papua New Guinea
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
===================================================================
RCS file: RCS/europe,v
retrieving revision 1996.13
retrieving revision 1996.13.1.1
diff -c -r1996.13 -r1996.13.1.1
*** europe 1996/11/24 01:07:37 1996.13
--- europe 1996/12/18 06:42:29 1996.13.1.1
***************
*** 78,84 ****
# of the text said:
#
# `An old stone obelisk marking a forgotten terrestrial meridian stands
! # beside the river at Kew. In the 18th century, before time and longditude
# was standardised by the Royal Observatory in Greenwich, scholars observed
# this stone and the movement of stars from Kew Observatory nearby. They
# made their calculations and set the time for the Horse Guards and Parliament,
--- 78,84 ----
# of the text said:
#
# `An old stone obelisk marking a forgotten terrestrial meridian stands
! # beside the river at Kew. In the 18th century, before time and longitude
# was standardised by the Royal Observatory in Greenwich, scholars observed
# this stone and the movement of stars from Kew Observatory nearby. They
# made their calculations and set the time for the Horse Guards and Parliament,
***************
*** 86,92 ****
# 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 deg. 28' 30" N, 0 deg. 18' 45" W. The longditude 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.]
--- 86,92 ----
# 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 deg. 28' 30" N, 0 deg. 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.]
***************
*** 167,173 ****
# It ends at 02:00 GMT on the morning of the day after the fourth Saturday
# in October. (All the redundant `morning of the day ...' is in the Act.)
# This is only of passing interest now as it will always be overridden by
! # an Order in Council (a Statutary Instrument, the SI thing mentioned above)
# to specify the EC specified dates.
# From Peter Ilieve <peter at memex.co.uk> (1993-10-18):
--- 167,173 ----
# It ends at 02:00 GMT on the morning of the day after the fourth Saturday
# in October. (All the redundant `morning of the day ...' is in the Act.)
# This is only of passing interest now as it will always be overridden by
! # an Order in Council (a Statutory Instrument, the SI thing mentioned above)
# to specify the EC specified dates.
# From Peter Ilieve <peter at memex.co.uk> (1993-10-18):
***************
*** 327,333 ****
# so that part of the 1922 Act will still apply.
#
# - The Defence (Summer Time) Regulations, 1939, SR&O 1939 No. 1379
! # [SR&O == Statutary Regulation and Order]
#
# These were made under the Emergency Powers (Defence) Act, 1939.
# It changes the end date to be the day after the third Saturday in November.
--- 327,333 ----
# so that part of the 1922 Act will still apply.
#
# - The Defence (Summer Time) Regulations, 1939, SR&O 1939 No. 1379
! # [SR&O == Statutory Regulation and Order]
#
# These were made under the Emergency Powers (Defence) Act, 1939.
# It changes the end date to be the day after the third Saturday in November.
***************
*** 403,409 ****
# harmonise with the EC since 1981. The major change is that the time changes
# to 01:00 GMT.)
#
! # - The Summer Time Order, 1992, SI 1992/1729 [SI == Statutary Instrument]
#
# This specifies dates of:
# Start End
--- 403,409 ----
# harmonise with the EC since 1981. The major change is that the time changes
# to 01:00 GMT.)
#
! # - The Summer Time Order, 1992, SI 1992/1729 [SI == Statutory Instrument]
#
# This specifies dates of:
# Start End
***************
*** 1298,1304 ****
1:00 Greece CE%sT 1944 Apr 4
2:00 Greece EE%sT 1981
# Shanks says they switched to C-Eur in 1981;
! # go with EU intead, since Greece joined it on Jan 1.
2:00 EU EE%sT
# Hungary
--- 1298,1304 ----
1:00 Greece CE%sT 1944 Apr 4
2:00 Greece EE%sT 1981
# Shanks says they switched to C-Eur in 1981;
! # go with EU instead, since Greece joined it on Jan 1.
2:00 EU EE%sT
# Hungary
***************
*** 1819,1827 ****
2:00 E-Eur EE%sT
# Russia
! # From Shanks (1991):
! # In 1929 the Soviet Union instituted a 5 day week; in 1932 it instituted
! # a 6 day week; on 1940-06-27 it returned to the Gregorian week.
#
# From Paul Eggert <eggert at twinsun.com> (1996-11-22):
# Except for Moscow after 1919-07-01, I invented the time zone abbreviations,
--- 1819,1833 ----
2:00 E-Eur EE%sT
# Russia
!
! # From Chris Carrier <72157.3334 at CompuServe.COM> (1996-12-02):
! # On 1929-10-01 the Soviet Union instituted an ``Eternal Calendar''
! # with 30-day months plus 5 holidays, with a 5-day week.
! # On 1931-12-01 it changed to a 6-day week; in 1934 it reverted to the
! # Gregorian calendar while retaining the 6-day week; on 1940-06-27 it
! # reverted to the 7-day week. With the 6-day week the usual days
! # off were the 6th, 12th, 18th, 24th and 30th of the month.
! # (Source: Evitiar Zerubavel, _The Seven Day Circle_)
#
# From Paul Eggert <eggert at twinsun.com> (1996-11-22):
# Except for Moscow after 1919-07-01, I invented the time zone abbreviations,
***************
*** 1882,1888 ****
# as far as I remember it was done exactly during winter->summer switching
# so we (Novosibirsk) simply did not switch.
Zone Asia/Novosibirsk 5:31:40 - LMT 1924 May 2
! 6:00 - NOVT 1957 Mar # Novosibirsk TIme
7:00 Russia NOV%sT 1991 Mar 31 2:00s
6:00 1:00 NOVST 1991 Sep 29 2:00s
6:00 - NOVT 1992 Jan 19 2:00s
--- 1888,1894 ----
# as far as I remember it was done exactly during winter->summer switching
# so we (Novosibirsk) simply did not switch.
Zone Asia/Novosibirsk 5:31:40 - LMT 1924 May 2
! 6:00 - NOVT 1957 Mar # Novosibirsk Time
7:00 Russia NOV%sT 1991 Mar 31 2:00s
6:00 1:00 NOVST 1991 Sep 29 2:00s
6:00 - NOVT 1992 Jan 19 2:00s
***************
*** 2134,2140 ****
# Ukraine
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Ukraine 1917 only - Jul 1 23:00 1:00 UST # Ukrainian Summer Time
! Rule Ukraine 1917 only - Dec 28 0:00 0 KMT # Kiev Mean TIme
Rule Ukraine 1918 only - May 31 22:00 2:00 UDST # Ukrainian Double Summer Time
Rule Ukraine 1918 only - Sep 17 0:00 1:00 UST
Rule Ukraine 1919 only - May 31 23:00 2:00 UDST
--- 2140,2146 ----
# Ukraine
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Ukraine 1917 only - Jul 1 23:00 1:00 UST # Ukrainian Summer Time
! Rule Ukraine 1917 only - Dec 28 0:00 0 KMT # Kiev Mean Time
Rule Ukraine 1918 only - May 31 22:00 2:00 UDST # Ukrainian Double Summer Time
Rule Ukraine 1918 only - Sep 17 0:00 1:00 UST
Rule Ukraine 1919 only - May 31 23:00 2:00 UDST
===================================================================
RCS file: RCS/northamerica,v
retrieving revision 1996.13
retrieving revision 1996.13.1.1
diff -c -r1996.13 -r1996.13.1.1
*** northamerica 1996/11/24 01:07:37 1996.13
--- northamerica 1996/12/18 06:42:29 1996.13.1.1
***************
*** 920,928 ****
# MEXICO BAJA CAL N 7 H BEHIND UTC BAJA CALIFORNIA SUR AND
# MEXICO BAJA CAL N N. PACIFIC COAST (STATES
# MEXICO BAJA CAL N OF SINALOA AND SONORA)
! # MEXICO BAJA CAL N 8 H BEHIND UTC ABOVE 28TH PARALLAL APR 3
# MEXICO BAJA CAL N - OCT 29
! # MEXICO BAJA CAL N 7 H BEHIND UTC ABOVE 28TH PARALLAL APR 3
# MEXICO BAJA CAL N - 0CT 29
# MEXICO 6 H BEHIND UTC STATES OF DURANGO,
# MEXICO COAHUILA, NUEVO LEON,
--- 920,928 ----
# MEXICO BAJA CAL N 7 H BEHIND UTC BAJA CALIFORNIA SUR AND
# MEXICO BAJA CAL N N. PACIFIC COAST (STATES
# MEXICO BAJA CAL N OF SINALOA AND SONORA)
! # MEXICO BAJA CAL N 8 H BEHIND UTC ABOVE 28TH PARALLEL APR 3
# MEXICO BAJA CAL N - OCT 29
! # MEXICO BAJA CAL N 7 H BEHIND UTC ABOVE 28TH PARALLEL APR 3
# MEXICO BAJA CAL N - 0CT 29
# MEXICO 6 H BEHIND UTC STATES OF DURANGO,
# MEXICO COAHUILA, NUEVO LEON,
===================================================================
RCS file: RCS/southamerica,v
retrieving revision 1996.13
retrieving revision 1996.13.1.1
diff -c -r1996.13 -r1996.13.1.1
*** southamerica 1996/11/24 01:07:37 1996.13
--- southamerica 1996/12/18 06:42:29 1996.13.1.1
***************
*** 61,67 ****
# ARGENTINA 3 H BEHIND UTC
# From Hernan G. Otero <hernan at isoft.com.ar> (1995-06-26):
! # I am sending modifications to the Argentinian time zone table...
# AR was chosen because they are the ISO letters that represent Argentina.
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
--- 61,67 ----
# ARGENTINA 3 H BEHIND UTC
# From Hernan G. Otero <hernan at isoft.com.ar> (1995-06-26):
! # I am sending modifications to the Argentine time zone table...
# AR was chosen because they are the ISO letters that represent Argentina.
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
***************
*** 99,105 ****
# These corrections were contributed by InterSoft Argentina S.A.,
# obtaining the data from the:
# Talleres de Hidrografia Naval Argentina
! # (Argentinian Naval Hydrography Institute)
#
# Shanks gives 1989 Mar 16 and stops after 1990 Mar 4; go with Otero.
Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 -
--- 99,105 ----
# These corrections were contributed by InterSoft Argentina S.A.,
# obtaining the data from the:
# Talleres de Hidrografia Naval Argentina
! # (Argentine Naval Hydrography Institute)
#
# Shanks gives 1989 Mar 16 and stops after 1990 Mar 4; go with Otero.
Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 -
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