The big news is that Japan will most likely start using daylight
saving next year. It isn't confirmed yet, but it seems probable.
See below for details. A lot of software in Japan will have to be
rewritten, since they haven't used daylight saving since the dawn of
the computer era. This looks like a growth opportunity for tz....
Also, while I was in Japan last month I read a newspaper article
talking about daylight saving; it mentioned something about the
Indiana legislature changing the time zone rules again in the last few
weeks. No details. Anybody else heard anything about this rumor?
Other than that, here are proposed changes to the current tz rules:
Proposed changes that affect behavior:
* Ephraim Silverberg's correction for this autumn's transition in Israel.
* Make `W-SU' a link to Europe/Moscow instead of something with ???? in it.
Proposed comment and/or cleanup changes:
* Remove unused GB-Eire rules starting in 1996, and comment on the
relationship between GB-Eire and EC.
* Comments about the proposed daylight saving time in Japan in 1996.
* Comments about DST in Japan between 1948 and 1951.
* Comment Serbia/Yugoslavia's name more accurately.
PS. I'll be on vacation starting Thursday so won't answer mail for a while.
===================================================================
RCS file: RCS/asia,v
retrieving revision 1994.8
retrieving revision 1994.8.1.1
diff -c -r1994.8 -r1994.8.1.1
*** asia 1994/12/10 16:26:05 1994.8
--- asia 1995/04/04 18:04:39 1994.8.1.1
***************
*** 48,54 ****
# 8:00 PST PDT Philippines*
# 8:00 SGT Singapore
# 8:00 UST UDT Ulan Bator*
! # 9:00 JST Japan
# 9:00 KST KDT Korea
# 9:00 MLT Moluccas*
# 9:30 CST Australian Central Standard Time
--- 48,54 ----
# 8:00 PST PDT Philippines*
# 8:00 SGT Singapore
# 8:00 UST UDT Ulan Bator*
! # 9:00 JST JDT Japan
# 9:00 KST KDT Korea
# 9:00 MLT Moluccas*
# 9:30 CST Australian Central Standard Time
***************
*** 461,467 ****
Rule Zion 1994 only - Apr 1 0:00 1:00 D
Rule Zion 1994 only - Aug 28 0:00 0:00 S
Rule Zion 1995 only - Mar 31 0:00 1:00 D
! Rule Zion 1995 only - Aug 27 0:00 0:00 S
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Tel_Aviv 2:19:04 - LMT 1880
--- 461,474 ----
Rule Zion 1994 only - Apr 1 0:00 1:00 D
Rule Zion 1994 only - Aug 28 0:00 0:00 S
Rule Zion 1995 only - Mar 31 0:00 1:00 D
! # On 1995-03-13 Ephraim Silverberg corrected the next line from Aug 27 to Sep 3.
! Rule Zion 1995 only - Sep 3 0:00 0:00 S
!
! # From Ephraim Silverberg (1995-03-13):
! # The Spokeswoman's office confirmed that there are not yet any dates
! # for the timezone conversion for the years 1996 and beyond yet
! # and this is one of the things the newly-appointed Minister of Interior
! # will have to decide sometime this year.
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Tel_Aviv 2:19:04 - LMT 1880
***************
*** 475,494 ****
# `9:00' and `JST' is from Guy Harris.
! # From Paul Eggert <eggert(a)twinsun.com> (November 18, 1993):
! # Shanks says that the far southern Ryukyu Is (Nansei-Shoto) are 8:00,
! # but we don't have a good location name for them;
! # we don't even know the name of the principal town.
! # There is no information for Marcus.
! # Other Japanese possessions are probably like Asia/Tokyo.
# From Shanks (1991):
# Japan switched from the Japanese calendar on 1893 Jan 1.
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Tokyo 9:19:04 - LMT 1896
9:00 - JST
#Zone Asia/South_Ryukyu 8:14:44 - LMT 1896 # Amitori
# 8:00 - CST
# Jordan
# From Paul Eggert <eggert(a)twinsun.com> (November 18, 1993):
--- 482,525 ----
# `9:00' and `JST' is from Guy Harris.
! # From Paul Eggert <eggert(a)twinsun.com> (1995-03-06):
! # Today's _Asahi Evening News_ (page 4) reports that Japan had
! # daylight saving between 1948 and 1951, but ``the system was discontinued
! # because the public believed it would lead to longer working hours.''
! # Shanks writes that daylight saving in Japan during those years was as follows:
! # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
! #Rule Japan 1948 only - May Sun>=1 2:00 1:00 D
! #Rule Japan 1948 1951 - Sep Sat>=8 2:00 0 S
! #Rule Japan 1949 only - Apr Sun>=1 2:00 1:00 D
! #Rule Japan 1950 1951 - May Sun>=1 2:00 1:00 D
! # but the only locations using it were US military bases.
! # We go with Shanks and omit daylight saving in those years for Asia/Tokyo.
! #
! # The same news article also reports that Japan is likely to go on DST in 1996
! # as follows, where I've guessed the AT and LETTER/S columns:
! # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
! #Rule Japan 1996 max - Apr Sun>=1 2:00 1:00 D
! #Rule Japan 1996 max - Oct lastSun 2:00 0 S
# From Shanks (1991):
# Japan switched from the Japanese calendar on 1893 Jan 1.
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Tokyo 9:19:04 - LMT 1896
9:00 - JST
+ # If Japan adopts DST in 1996, replace the above line with the following lines:
+ # 9:00 - JST 1996
+ # 9:00 Japan J%sT
+ # and uncomment the two `Rule' lines commented out above.
+
+ # From Paul Eggert <eggert(a)twinsun.com> (November 18, 1993):
+ # Shanks says that the far southern Ryukyu Is (Nansei-Shoto) are 8:00,
+ # but we don't have a good location name for them;
+ # we don't even know the name of the principal town.
+ # Zone NAME GMTOFF RULES FORMAT [UNTIL]
#Zone Asia/South_Ryukyu 8:14:44 - LMT 1896 # Amitori
# 8:00 - CST
+ # There is no information for Marcus.
+ # Other Japanese possessions are probably like Asia/Tokyo.
# Jordan
# From Paul Eggert <eggert(a)twinsun.com> (November 18, 1993):
===================================================================
RCS file: RCS/backward,v
retrieving revision 1995.2
retrieving revision 1995.2.1.1
diff -c -r1995.2 -r1995.2.1.1
*** backward 1995/02/21 15:43:22 1995.2
--- backward 1995/03/23 01:42:23 1995.2.1.1
***************
*** 73,76 ****
--- 73,77 ----
Link Pacific/Samoa US/Samoa
Link Etc/UTC UTC
Link Etc/Universal Universal
+ Link Europe/Moscow W-SU
Link Etc/Zulu Zulu
===================================================================
RCS file: RCS/europe,v
retrieving revision 1995.2
retrieving revision 1995.2.1.1
diff -c -r1995.2 -r1995.2.1.1
*** europe 1995/02/21 15:43:19 1995.2
--- europe 1995/04/04 10:39:24 1995.2.1.1
***************
*** 714,724 ****
Rule GB-Eire 1971 only - Oct 31 3:00 0 GMT
Rule GB-Eire 1972 1980 - Oct Sun>=23 2:00s 0 GMT
# 1981 on
! Rule GB-Eire 1981 max - Mar lastSun 1:00u 1:00 BST
Rule GB-Eire 1981 1989 - Oct Sun>=23 1:00u 0 GMT
Rule GB-Eire 1990 1995 - Oct Sun>=22 1:00u 0 GMT
! Rule GB-Eire 1996 max - Oct lastSun 1:00u 0 GMT
! # Also see EC, which (starting 1996) differs only in LETTER/S.
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Europe/London -0:01:15 - LMT 1847 Sep 22
--- 714,723 ----
Rule GB-Eire 1971 only - Oct 31 3:00 0 GMT
Rule GB-Eire 1972 1980 - Oct Sun>=23 2:00s 0 GMT
# 1981 on
! Rule GB-Eire 1981 1995 - Mar lastSun 1:00u 1:00 BST
Rule GB-Eire 1981 1989 - Oct Sun>=23 1:00u 0 GMT
Rule GB-Eire 1990 1995 - Oct Sun>=22 1:00u 0 GMT
! # See EC for rules starting in 1996.
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Europe/London -0:01:15 - LMT 1847 Sep 22
***************
*** 760,766 ****
Rule EC 1979 1995 - Sep lastSun 1:00u 0 -
Rule EC 1981 max - Mar lastSun 1:00u 1:00 " DST"
Rule EC 1996 max - Oct lastSun 1:00u 0 -
- # Also see GB-Eire, which (starting 1996) differs only in LETTER/S.
# W-Eur differs from EC only in that W-Eur uses standard time.
Rule W-Eur 1800 only - Jan 1 0:00 0 -
--- 759,764 ----
***************
*** 824,830 ****
Zone WET 0:00 EC WET%s
Zone MET 1:00 M-Eur MET%s
Zone EET 2:00 EC EET%s
- Zone W-SU 3:00 M-Eur ????
# Tom Hoffman says that MET is also known as Central European Time
--- 822,827 ----
***************
*** 1789,1795 ****
12:00 - ASK 1992 Jan 19 2:00s
13:00 Russia AS%s
! # Serbia
# They switched from the Julian to the Gregorian calendar on 1918 Mar 18.
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Europe/Belgrade 1:22:00 - LMT 1884
--- 1786,1792 ----
12:00 - ASK 1992 Jan 19 2:00s
13:00 Russia AS%s
! # Yugoslavia (what's left of it -- mostly Serbia)
# They switched from the Julian to the Gregorian calendar on 1918 Mar 18.
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Europe/Belgrade 1:22:00 - LMT 1884
