proposed tz changes for Israel, Mexico, Simferopol, etc.

Paul Eggert eggert at twinsun.com
Thu Jul 27 17:19:54 UTC 2000


The Israeli daylight-saving changes prompted me to collect all the
proposed changes that have been accumulating to the tz data.  Here
they are:

* New daylight saving rules for Israel starting this fall.
  (Thanks to Ephraim Silverberg for this info.)

* New zones America/Merida and America/Monterrey, to account for 1980s
  Mexican daylight saving time experiments that we previosly didn't
  know about.  Also, add 23 days to the date of the April 1942
  transition in Mexico.  (Thanks to Gwillim Law for this info.)

* Fix a glitch in the March 1997 transition for Europe/Simferopol,
  which incorrectly changed the clocks twice.  (Thanks to Gwillim Law
  for catching this bug.)

The following changes affect commentary only:

* Refer to ZoneInfo, a new Java-based tz file reader.

* Refer to the new computer version of Shanks's excellent time zone data.

* Refer to the new Leap Second Discussion mailing list.

* Report the Economist's incorrect story about DST in Iraqi Kurdistan,
  and report Rives McDow's refutation.

* Report a legal citation for the 2000/2001 Tasmanian rules
  (thanks to Sim Alam for this info).

* Fix typos in commentary about Iran, and update URL.

===================================================================
RCS file: RCS/zone.tab,v
retrieving revision 2000.1
retrieving revision 2000.1.0.1
diff -pu -r2000.1 -r2000.1.0.1
--- zone.tab	2000/01/18 14:21:22	2000.1
+++ zone.tab	2000/07/27 17:08:27	2000.1.0.1
@@ -247,6 +247,8 @@ MV	+0410+07330	Indian/Maldives
 MW	-1547+03500	Africa/Blantyre
 MX	+1924-09909	America/Mexico_City	Central Time - most locations
 MX	+2105-08646	America/Cancun	Central Time - Quintana Roo
+MX	+2058-08937	America/Merida	Central Time - Campeche, Yucatan
+MX	+2540-10019	America/Monterrey	Central Time - Coahuila, Durango, Nuevo Leon, Tamaulipas
 MX	+2313-10625	America/Mazatlan	Mountain Time - S Baja, Nayarit, Sinaloa
 MX	+2838-10605	America/Chihuahua	Mountain Time - Chihuahua
 MX	+2904-11058	America/Hermosillo	Mountain Standard Time - Sonora
===================================================================
RCS file: RCS/northamerica,v
retrieving revision 2000.3
retrieving revision 2000.3.0.1
diff -pu -r2000.3 -r2000.3.0.1
--- northamerica	2000/03/04 15:31:08	2000.3
+++ northamerica	2000/07/27 17:08:27	2000.3.0.1
@@ -1002,52 +1002,35 @@ Zone America/Dawson	-9:17:40 -	LMT	1900 
 
 # Mexico
 
-# From Guy Harris:
-# Rules are from the Official Airline Guide, Worldwide Edition, for 1987.
-# Rules [before] 1987 are unknown.
-# The comments in the OAG say "Only Ensenada, Mexicale, San Felipe and Tijuana
-# observe DST."  This is presumably Baja California Norte, above 28th parallel,
-# as listed there; [there is also] "Baja California Sur and N. Pacific
-# Coast (States of Sinaloa and Sonora)."
-
-# From Bob Devine (1988-01-28):
-# The Federal District (where Mexico City is) has observed [DST] several
-# times but not recently.
-#
-# I don't where to draw the line in the North Baja area.  28th latitude
-# sounds good -- but it may be higher (how far [d]o radio stations from
-# San Diego affect culture?).
-#
-# The dates of DST probably go back to 1981.  The rules are the same as
-# US's.  This is going to be a headache for US presidential electi[o]n years!
-
-# From Arthur David Olson (1988-02-13)
-# Since the 1981 starting date is only "probable," we'll keep the 1987
-# starting date below.
-
-# From U. S. Naval Observatory (1989-01-19):
-# 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,
-# MEXICO                                 TAMAULIPAS
-# MEXICO              5 H  BEHIND UTC    STATES OF DURANGO,
-# MEXICO                                 COAHUILA, NUEVO LEON,
-# MEXICO                                 TAMAULIPAS  APR 3 - OCT 29
-# MEXICO              6 H  BEHIND UTC    GENERAL MEXICO, STATES OF
-# MEXICO                                 CAMPECHE, QUINTANA ROO AND
-# MEXICO                                 YUCATAN
-
-# From Arthur David Olson (1989-01-21):
-# April 3 fell on a Sunday in 1988; October 29 fell on a Sunday in 1989.  Ahem.
-# USNO claims there should be four Mexican zones rather than three:
-# a zone that's GMT-8 with DST; a zone that's always GMT-7;
-# a zone that's GMT-6 with DST; and a zone that's always GMT-6.
+# Gwillim Law reports this source for daylight saving time in Mexico:
+# <a href="http://www.spin.com.mx/verano/">
+# Daylight saving time * SPIN-Internet (in Spanish)
+# </a>
+# Law (2000-03-09) translates it as follows:
+#
+# Standard time effective in Mexico takes its origin in the
+# presidential decree of April 24, 1942.  The time of the 120th
+# meridian applies to the state of Baja California; of the 105th
+# meridian to the states of Baja California Sur, Sonora, Sinaloa, and
+# Nayarit; and the time of the 90th meridian to the rest of the
+# country.
+#
+# In the country, there have been several attempts made to adapt
+# standard time with the object of arriving at a better use of
+# daylight for social and economic activities.  In December, 1981 a
+# permanent time zone was decreed for the states of Campeche, Yucatan,
+# and Quintana Roo, displacing them from the 90th to the 75th
+# meridian.  This disposition was annulled on December 2, 1982.
+#
+# In 1988 a Summer Time was established for the states of Tamaulipas,
+# Nuevo Leon, Coahuila, and Durango, which meant that from the first
+# Sunday in April to the last [Sunday] of October those states
+# displaced their time from the 90th to the 75th meridian.  That
+# disposition lasted for one year.
+
+# From Paul Eggert (2000-07-26):
+# Shanks gives 1942-04-01 instead of 1942-04-24, and omits the 1981
+# and 1988 DST experiments.  Go with spin.com.mx.
 
 # From Alan Perry <alan.perry at eng.sun.com> (1996-02-15):
 # A guy from our Mexico subsidiary finally found the Presidential Decree
@@ -1093,7 +1076,6 @@ Zone America/Dawson	-9:17:40 -	LMT	1900 
 # savings time so as to stay on the same time zone as the southern part of
 # Arizona year round.
 
-# From Shanks:
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	Mexico	1939	only	-	Feb	5	0:00	1:00	D
 Rule	Mexico	1939	only	-	Jun	25	0:00	0	S
@@ -1111,10 +1093,22 @@ Rule	BajaN	1954	1961	-	Sep	lastSun	2:00	
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 # Quintana Roo
 Zone America/Cancun	-5:47:04 -	LMT	1922 Jan  1  0:12:56
+			-6:00	-	CST	1981 Dec
+			-5:00	-	EST	1982 Dec  2
 			-6:00	-	CST	1996
 			-6:00	Mexico	C%sT	1997 Oct lastSun 2:00
 			-5:00	Mexico	E%sT	1998 Aug  2  2:00
 			-6:00	Mexico	C%sT
+# Campeche, Yucatan
+Zone America/Merida	-5:58:28 -	LMT	1922 Jan  1  0:01:32
+			-6:00	-	CST	1981 Dec
+			-5:00	-	EST	1982 Dec  2
+			-6:00	Mexico	C%sT
+# Coahuila, Durango, Nuevo Leon, Tamaulipas
+Zone America/Monterrey	-6:41:16 -	LMT	1922 Jan  1  0:01:32
+			-6:00	-	CST	1988
+			-6:00	US	C%sT	1989
+			-6:00	Mexico	C%sT
 # Central Mexico
 Zone America/Mexico_City -6:36:36 -	LMT	1922 Jan  1  0:23:24
 			-7:00	-	MST	1927 Jun 10 23:00
@@ -1141,19 +1135,19 @@ Zone America/Hermosillo	-7:23:52 -	LMT	1
 			-7:00	-	MST	1931 May  1 23:00
 			-6:00	-	CST	1931 Oct
 			-7:00	-	MST	1932 Mar 30 23:00
-			-6:00	-	CST	1942 Apr
+			-6:00	-	CST	1942 Apr 24
 			-7:00	-	MST	1949 Jan 14
 			-8:00	-	PST	1970
 			-7:00	Mexico	M%sT	1999
 			-7:00	-	MST
-# S Baja California, Nayarit, Sinaloa
+# Baja California Sur, Nayarit, Sinaloa
 Zone America/Mazatlan	-7:05:40 -	LMT	1921 Dec 31 23:54:20
 			-7:00	-	MST	1927 Jun 10 23:00
 			-6:00	-	CST	1930 Nov 15
 			-7:00	-	MST	1931 May  1 23:00
 			-6:00	-	CST	1931 Oct
 			-7:00	-	MST	1932 Mar 30 23:00
-			-6:00	-	CST	1942 Apr
+			-6:00	-	CST	1942 Apr 24
 			-7:00	-	MST	1949 Jan 14
 			-8:00	-	PST	1970
 			-7:00	Mexico	M%sT
@@ -1161,7 +1155,7 @@ Zone America/Mazatlan	-7:05:40 -	LMT	192
 Zone America/Tijuana	-7:48:04 -	LMT	1922 Jan  1  0:11:56
 			-8:00	-	PST	1927 Jun 10 23:00
 			-7:00	-	MST	1930 Nov 16
-			-8:00	-	PST	1942 Apr
+			-8:00	-	PST	1942 Apr 24
 			-7:00	-	MST	1949 Jan 14
 			-8:00	BajaN	P%sT	1976
 			-8:00	US	P%sT	1996
===================================================================
RCS file: RCS/europe,v
retrieving revision 2000.4
retrieving revision 2000.4.0.1
diff -pu -r2000.4 -r2000.4.0.1
--- europe	2000/03/14 14:38:50	2000.4
+++ europe	2000/07/27 17:08:27	2000.4.0.1
@@ -131,6 +131,10 @@
 # A bill was drafted in 1909 and introduced in Parliament several times,
 # but it met with ridicule and opposition, especially from farming interests.
 # One-hour Summer Time was eventually adopted as a wartime measure in 1916.
+# See:
+# <a href="http://www.the-times.co.uk/news/pages/tim/2000/05/18/x-timcrtcrt01011.html">
+# Summer Time Arrives Early, The Times (2000-05-18)
+# </a>
 
 # From Paul Eggert (1996-09-03):
 # The OED Supplement says that the English originally said ``Daylight Saving''
@@ -1856,7 +1860,8 @@ Zone Europe/Simferopol	2:16:24 -	LMT	188
 			3:00	1:00	MSD	1996 Oct 27 3:00s
 # IATA SSIM (1997-09) says Crimea switched to EET/EEST.
 # Assume it happened in March by not changing the clocks.
-			3:00	Russia	MSK/MSD	1997 Mar lastSun 1:00u
+			3:00	Russia	MSK/MSD	1997
+			3:00	-	MSK	1997 Mar lastSun 1:00u
 			2:00	EU	EE%sT
 
 # Yugoslavia
===================================================================
RCS file: RCS/asia,v
retrieving revision 2000.3
retrieving revision 2000.3.0.1
diff -pu -r2000.3 -r2000.3.0.1
--- asia	2000/03/04 15:31:07	2000.3
+++ asia	2000/07/27 17:08:27	2000.3.0.1
@@ -370,9 +370,9 @@ Zone Asia/Jayapura	9:22:48 -	LMT	1932 No
 			9:00	-	JAYT
 
 # Iran
-# From Paul Eggert (1999-09-27), following up a suggestion by Rich Wales:
+# From Paul Eggert (2000-06-12), following up a suggestion by Rich Wales:
 # Ahmea Alavi in
-# <a href="http://tehran.stanford.edu/Iran_Lib/Calendar/taghveem.txt">
+# <a href="http://www.persia.org/Iran_Lib/Calendar/taghveem.txt">
 # TAGHVEEM (1993-07-12)
 # </a>
 # writes ``Daylight saving time in Iran starts from the first day
@@ -385,12 +385,13 @@ Zone Asia/Jayapura	9:22:48 -	LMT	1932 No
 #	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
+#	1996	03-21!=	03-20	09-22   09-22
+#	1997	03-22!=	03-21	09-22!= 09-23
 #	1998	03-21	03-21	09-21!= 09-23
 #	1999	03-22!=	03-21	09-22!= 09-23
 #	2000	03-21!=	03-20	09-21!= 09-22
-#	2001	03-17!=	03-21	09-19!= 09-23
+#	2001	03-19!=	03-21	09-19!= 09-23
+#	2002	03-18!=	03-21	09-18!= 09-23
 #
 # Go with Alavi starting with 1992.
 # I used Ed Reingold's cal-persia in GNU Emacs 19.34 to compute Persian dates.
@@ -455,7 +456,23 @@ Zone	Asia/Tehran	3:25:44	-	LMT	1916
 			4:00	Iran	IR%sT	1979
 			3:30	Iran	IR%sT
 
+
 # Iraq
+#
+# From Jonathan Lennox <lennox at cs.columbia.edu> (2000-06-12):
+# An article in this week's Economist ("Inside the Saddam-free zone", p. 50 in
+# the U.S. edition) on the Iraqi Kurds contains a paragraph: 
+# "The three northern provinces ... switched their clocks this spring and
+# are an hour ahead of Baghdad."
+#
+# But Rives McDow (2000-06-18) quotes a contact in Iraqi-Kurdistan as follows:
+# In the past, some Kurdish nationalists, as a protest to the Iraqi
+# Government, did not adhere to daylight saving time.  They referred
+# to daylight saving as Saddam time.  But, as of today, the time zone
+# in Iraqi-Kurdistan is on standard time with Baghdad, Iraq.
+#
+# So we'll ignore the Economist's claim.
+
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	Iraq	1982	only	-	May	1	0:00	1:00	D
 Rule	Iraq	1982	1984	-	Oct	1	0:00	0	S
@@ -526,7 +543,7 @@ Rule	Zion	1988	only	-	Apr	 9	0:00	1:00	D
 Rule	Zion	1988	only	-	Sep	 3	0:00	0	S
 
 # From Ephraim Silverberg <ephraim at cs.huji.ac.il>
-# (1997-03-04, 1998-03-16, 1998-12-28, and 2000-01-17):
+# (1997-03-04, 1998-03-16, 1998-12-28, 2000-01-17 and 2000-07-25):
 
 # According to the Office of the Secretary General of the Ministry of
 # Interior, there is NO set rule for Daylight-Savings/Standard time changes.
@@ -537,14 +554,19 @@ Rule	Zion	1988	only	-	Sep	 3	0:00	0	S
 # Saturday night from midnight daylight savings time to 11 p.m. standard
 # time.  1996 is an exception to this rule where the change back to standard
 # time took place on Sunday night instead of Saturday night to avoid
-# conflicts with the Jewish New Year.  Starting in 1999, the change to
-# daylight savings time will still be on a Friday morning but from
+# conflicts with the Jewish New Year.  In 1999, the change to
+# daylight savings time was still on a Friday morning but from
 # 2 a.m. IST to 3 a.m. IDT; furthermore, the change back to standard time
-# will now also be on a Friday morning from 2 a.m. IDT to 1 a.m. IST for
-# 1999 only.  In the years from 2000 to 2002, the change back will be from
-# 2 a.m. IDT to 1 a.m. IST the morning after the Jewish festival of
-# Shmini Atzeret (i.e. the morning of the 23rd of Tishrei in the lunar
-# Hebrew calendar).
+# was also on a Friday morning from 2 a.m. IDT to 1 a.m. IST for
+# 1999 only.  In the year 2000, the change to daylight savings time was
+# similar to 1999, but although the change back will be on a Friday, it
+# will take place from 1 a.m. IDT to midnight IST.  Starting in 2001, all
+# changes to/from will take place at 1 a.m. old time, but now there is no
+# rule as to what day of the week it will take place in as the start date
+# (except in 2003) is the night after the Passover Seder (i.e. the eve
+# of the 16th of Nisan in the lunar Hebrew calendar) and the end date
+# (except in 2002) is three nights before Yom Kippur [Day of Atonement]
+# (the eve of the 7th of Tishrei in the lunar Hebrew calendar).
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	Zion	1989	only	-	Apr	30	0:00	1:00	D
@@ -592,29 +614,37 @@ Rule	Zion	1998	only	-	Sep	 6	0:00	0	S
 Rule	Zion	1999	only	-	Apr	 2	2:00	1:00	D
 Rule	Zion	1999	only	-	Sep	 3	2:00	0	S
 
-# Minister of Interior, Natan Sharansky, has announced the dates for
-# the years 2000-2002.  However, sources inside the ministry have noted
-# that the end date of 2000 and both dates of 2001-2002 should be regarded
-# as tentative pending final approval.
+# The Knesset Interior Committee has changed the dates for 2000 for
+# the third time in just over a year and have set new dates for the
+# years 2001-2004 as well.
+#
+# The official announcement for the start date of 2000 can be viewed at:
+#
+#	ftp://ftp.huji.ac.il/pub/tz/announcements/2000-start.ps.gz
 #
-# The official announcement for the years 2000-2002 can be viewed at:
+# The official announcement for the end date of 2000 and the dates
+# for the years 2001-2004 can be viewed at:
 #
-#	ftp://ftp.huji.ac.il/pub/tz/announcements/2000-2002.ps.gz
+#	ftp://ftp.huji.ac.il/pub/tz/announcements/2000-2004.ps.gz
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	Zion	2000	only	-	Apr	14	2:00	1:00	D
-Rule	Zion	2000	only	-	Oct	22	2:00	0	S
-Rule	Zion	2001	only	-	Apr	 6	2:00	1:00	D
-Rule	Zion	2001	only	-	Oct	10	2:00	0	S
-Rule	Zion	2002	only	-	Mar	29	2:00	1:00	D
-Rule	Zion	2002	only	-	Sep	29	2:00	0	S
+Rule	Zion	2000	only	-	Oct	 6	1:00	0	S
+Rule	Zion	2001	only	-	Apr	 9	1:00	1:00	D
+Rule	Zion	2001	only	-	Sep	24	1:00	0	S
+Rule	Zion	2002	only	-	Mar	29	1:00	1:00	D
+Rule	Zion	2002	only	-	Oct	 7	1:00	0	S
+Rule	Zion	2003	only	-	Mar	28	1:00	1:00	D
+Rule	Zion	2003	only	-	Oct	 3	1:00	0	S
+Rule	Zion	2004	only	-	Apr	 7	1:00	1:00	D
+Rule	Zion	2004	only	-	Sep	22	1:00	0	S
 
-# From Paul Eggert (2000-01-17):
-# Here are guesses for rules after 2002.
+# From Paul Eggert (2000-07-25):
+# Here are guesses for rules after 2004.
 # They are probably wrong, but they are more likely than no DST at all.
 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
-Rule	Zion	2003	max	-	Mar	Fri>=25	2:00	1:00	D
-Rule	Zion	2003	max	-	Oct	 1	2:00	0	S
+Rule	Zion	2005	max	-	Apr	 1	1:00	1:00	D
+Rule	Zion	2005	max	-	Oct	 1	1:00	0	S
 
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Asia/Jerusalem	2:20:56 -	LMT	1880
===================================================================
RCS file: RCS/australasia,v
retrieving revision 2000.3
retrieving revision 2000.3.0.1
diff -pu -r2000.3 -r2000.3.0.1
--- australasia	2000/03/04 15:31:07	2000.3
+++ australasia	2000/07/27 17:08:27	2000.3.0.1
@@ -737,6 +737,9 @@ Zone	Pacific/Wallis	12:15:20 -	LMT	1901
 # (Australia) and start daylight saving on the last Sunday in August in 2000
 # instead of the first Sunday in October.
 
+# Sim Alam (2000-07-03) reported a legal citation for the 2000/2001 rules:
+# http://www.thelaw.tas.gov.au/fragview/42++1968+GS3A@EN+2000070300
+
 # Victoria
 
 # The rules for 1971 through 1991 were reported by George Shepherd
===================================================================
RCS file: RCS/tz-link.htm,v
retrieving revision 2000.3
retrieving revision 2000.3.0.1
diff -pu -r2000.3 -r2000.3.0.1
--- tz-link.htm	2000/03/04 15:31:09	2000.3
+++ tz-link.htm	2000/07/27 17:08:27	2000.3.0.1
@@ -36,6 +36,9 @@ the code is in the file <samp>tzcode<var
 where <samp><var>C</var></samp> is the code's version;
 similarly, the data are in <samp>tzdata<var>D</var>.tar.gz</samp>,
 where <samp><var>D</var></samp> is the data's version.
+The code lets you compile the text data into time zone files, one for
+each location.  It also lets you read a compiled time zone file and
+interpret time stamps for that location.
 <P>
 The data are by no means authoritative. If you find errors, please
 send changes to the <A HREF="mailto:tz at elsie.nci.nih.gov">time zone
@@ -46,12 +49,6 @@ HREF="ftp://elsie.nci.nih.gov/pub/tzarch
 messages</A> (in <A HREF="http://www.gzip.org/">gzip</A> compressed
 format).
 <P>
-The <A HREF="http://www.gnu.org/software/libc/">GNU C Library</A>
-has an independent, thread-safe implementation of
-a time zone file reader that is compatible with <samp>tz</samp>.
-This library is freely available under the GNU Library General Public License,
-and is widely used in GNU/Linux systems.
-<P>
 The Web has several other sources for time zone and daylight saving time data.
 Here are some recent links that may be of interest.
 <H2>Web pages using recent versions of the <samp>tz</samp> database</H2>
@@ -73,6 +70,19 @@ zone converter</A> is a multilingual int
 is a web interface to a time zone database derived from
 <samp>tz</samp>'s.
 </UL>
+<H2>Other time zone file readers</H2>
+<UL>
+<LI>The <A HREF="http://www.gnu.org/software/libc/">GNU C Library</A>
+has an independent, thread-safe implementation of
+a time zone file reader that is compatible with <samp>tz</samp>.
+This library is freely available under the
+<A HREF="http://www.gnu.org/copyleft/lesser.html">
+GNU Lesser General Public License (LGPL)</A>,
+and is widely used in GNU/Linux systems.
+<LI><A HREF="http://www.bmsi.com/java/#TZ">ZoneInfo.java</A>
+is a time zone file reader written in Java.
+It is freely available under the GNU LGPL.
+</UL>
 <H2>Other <SAMP>tz</SAMP>-based time zone conversion software</H2>
 <UL>
 <LI><A
@@ -85,9 +95,10 @@ Microsoft Windows 95/98/NT4 program.
 <H2>Other time zone databases</H2>
 <UL>
 <LI><A HREF="http://www.astro.ch/atlas/">Astrology / Astrologie ->
-Astrodienst Atlas Database</A> is Astrodienst's Web version of <A
-HREF="http://astrocom.com/books/xrefa.htm#SHANKS">Shanks's
-excellent time zone history atlases</A> published by <A
+Astrodienst Atlas Database</A> is Astrodienst's Web version of Shanks's
+excellent time zone history atlases published in both <A
+HREF="http://astrocom.com/software/ACS_PC_Atlas.htm">computer</A> and <A
+HREF="http://astrocom.com/books/xrefa.htm#SHANKS">book</A> form by <A
 HREF="http://astrocom.com/">Astro Communications Services</A>.
 <LI><A HREF="http://worldtime.com/">WORLDTIME: interactive atlas,
 time info, public holidays</A>
@@ -174,6 +185,14 @@ briefly explains interplanetary space fl
 of IERS</A> contains official publications of the
 International Earth Rotation Service, the committee that decides
 when leap seconds occur.
+<LI>The <A
+HREF="http://clockdev.usno.navy.mil/archives/leapsecs.html">Leap
+Second Discussion List</A> covers <A
+HREF="http://www.gisdevelopment.net/reference/scie/s_t_41_50.htm#47">McCarthy
+and Klepczynski's proposal to remove leap seconds</A>, currently
+being studied by a <A
+HREF="http://www.intec.rug.ac.be/Research/Projects/ursi/Commissions.html">URSI
+Commission J</A> working group.
 </UL>
 <H2>Time notation</H2>
 <UL>



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