proposed tz changes for Gaza, Honduras, Cuba, tz-link.htm

Paul Eggert eggert at CS.UCLA.EDU
Tue Aug 22 07:58:51 UTC 2006


Steffen Thorsen <straen at thorsen.priv.no> writes:

> Yes, I have a few comments, not just Gaza:

Thanks very much for those comments.  Here is a proposed change to the
tz database that reflects them, along with the other changes I've been
saving up.  The tz-link.htm changes are particularly big this time:
for some reason the WWW gremlins have been breaking links all over the
web in the past couple of weeks.  (The CIA moved its home page!  Wow.)

=====

Changes affecting future time stamps (all thanks to you).

* Gaza observed DST starting April 1 this year.
* Cuba continues to observe DST through next year.
* Honduras plans to observe DST through 2009.

Commentary fixes:

* Remove obsolete reference to XHTML.
* Mention the uncertain historical status of Tomsk.  (Thanks to
  Jesper Norgaard Welen for this.)

Web page fixes:

* Add link to Wikipedia entry about the tz database (hey, we're famous!).
* Add link to gmane.org archive for mailing list.
* Add link to <http://home.tiscali.nl/~t876506/TZworld.html>.
* Remove link to expired draft-royer-ical-basic-04.txt.
* Remove link to expired draft-royer-timezone-registry.
* Remove link to expired draft-royer-calsch-xcal-03.txt.
* Remove link to http://s.keim.free.fr/tz/doc.html since its
  author now recommends against using it.
* Remove link to http://www1.tip.nl/~t876506/AboutTimeZonesHC.html
  since it is no longer maintained.
* Remove the "?lang=e" from the
  <http://www.astro.com/cgi/aq.cgi> link.
* Update broken links to the CIA (the CIA's root moved).
* Change "home-4.tiscali.nl" to the hopefully-more-stable "home.tiscali.nl".
* Update link to Canadian government time zone page.
* Update link to NPL time zone page.
* Update link to "A Timezone Option for DHCP".
* Remove old-fashioned paper references to GPS World and Metrologia;
  who uses paper any more?
* Add link to <http://www.aas.org/policy/LeapSecondCommittee.html>.
* Redo RFC 2822 reference to make it a bit more compact.
* The CLDR sideways data table moved and changed format; update reference,
  and change from "Russian" to "French" since the Russian seems to have
  vanished.

===================================================================
RCS file: RCS/Makefile,v
retrieving revision 2006.10
retrieving revision 2006.10.0.1
diff -pu -r2006.10 -r2006.10.0.1
--- Makefile	2006/08/21 13:56:08	2006.10
+++ Makefile	2006/08/22 07:40:41	2006.10.0.1
@@ -225,7 +225,7 @@ AWK=		nawk
 # The path where SGML DTDs are kept.
 SGML_SEARCH_PATH= $(TOPDIR)/share/doc/sgml-lib/REC-html401-19991224/
 
-# The catalog file(s) to use when validating XHTML.
+# The catalog file(s) to use when validating.
 SGML_CATALOG_FILES= HTML4.cat
 
 # The name, arguments and environment of a program to validate your web pages.
===================================================================
RCS file: RCS/asia,v
retrieving revision 2006.7
retrieving revision 2006.7.0.1
diff -pu -r2006.7 -r2006.7.0.1
--- asia	2006/08/21 13:56:08	2006.7
+++ asia	2006/08/22 07:40:41	2006.7.0.1
@@ -1468,6 +1468,14 @@ Zone	Asia/Karachi	4:28:12 -	LMT	1907
 # there is a good chance next year's end date will be around two weeks
 # earlier--the same goes for Jordan.
 
+# From Steffen Thorsen (2006-08-17):
+# I was informed by a user in Bethlehem that in Bethlehem it started the
+# same day as Israel, and after checking with other users in the area, I
+# was informed that they started DST one day after Israel.  I was not
+# able to find any authoritative sources at the time, nor details if
+# Gaza changed as well, but presumed Gaza to follow the same rules as
+# the West Bank.
+
 # The rules for Egypt are stolen from the `africa' file.
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule EgyptAsia	1957	only	-	May	10	0:00	1:00	S
@@ -1477,10 +1485,11 @@ Rule EgyptAsia	1959	1967	-	May	 1	1:00	1
 Rule EgyptAsia	1959	1965	-	Sep	30	3:00	0	-
 Rule EgyptAsia	1966	only	-	Oct	 1	3:00	0	-
 
-Rule Palestine	1999	max	-	Apr	Fri>=15	0:00	1:00	S
+Rule Palestine	1999	2005	-	Apr	Fri>=15	0:00	1:00	S
 Rule Palestine	1999	2003	-	Oct	Fri>=15	0:00	0	-
 Rule Palestine	2004	only	-	Oct	 1	1:00	0	-
 Rule Palestine	2005	max	-	Oct	 4	2:00	0	-
+Rule Palestine	2006	max	-	Apr	 1	0:00	1:00	S
 
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Asia/Gaza	2:17:52	-	LMT	1900 Oct
===================================================================
RCS file: RCS/europe,v
retrieving revision 2006.4
retrieving revision 2006.4.0.1
diff -pu -r2006.4 -r2006.4.0.1
--- europe	2006/08/21 13:56:09	2006.4
+++ europe	2006/08/22 07:40:41	2006.4.0.1
@@ -2012,7 +2012,9 @@ Zone Asia/Omsk		 4:53:36 -	LMT	1919 Nov 
 			 5:00	Russia	OMS%sT	1992 Jan 19 2:00s
 			 6:00	Russia	OMS%sT
 #
-# Novosibirskaya oblast'.
+# From Paul Eggert (2006-08-19): I'm guessing about Tomsk here; it's
+# not clear when it switched from +7 to +6.
+# Novosibirskaya oblast', Tomskaya oblast'.
 Zone Asia/Novosibirsk	 5:31:40 -	LMT	1919 Dec 14 6:00
 			 6:00	-	NOVT	1930 Jun 21 # Novosibirsk Time
 			 7:00	Russia	NOV%sT	1991 Mar 31 2:00s
@@ -2022,7 +2024,7 @@ Zone Asia/Novosibirsk	 5:31:40 -	LMT	191
 #
 # From Oscar van Vlijmen (2001-08-25): [This region consists of]
 # Kemerovskaya oblast', Krasnoyarskij kraj,
-# Tajmyrskij (Dolgano-Nenetskij) avtonomnyj okrug, Tomskaya oblast',
+# Tajmyrskij (Dolgano-Nenetskij) avtonomnyj okrug,
 # Respublika Tuva, Respublika Khakasiya, Evenkijskij avtonomnyj okrug.
 Zone Asia/Krasnoyarsk	 6:11:20 -	LMT	1920 Jan  6
 			 6:00	-	KRAT	1930 Jun 21 # Krasnoyarsk Time
===================================================================
RCS file: RCS/northamerica,v
retrieving revision 2006.8
retrieving revision 2006.8.0.1
diff -pu -r2006.8 -r2006.8.0.1
--- northamerica	2006/08/21 13:56:09	2006.8
+++ northamerica	2006/08/22 07:40:41	2006.8.0.1
@@ -2096,6 +2096,11 @@ Zone America/Costa_Rica	-5:36:20 -	LMT	1
 # adjustment in Cuba.  We will stay in daylight saving time:
 # http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html
 
+# From Steffen Thorsen (2006-08-17):
+# It is likely that they are not reverting back to standard time this
+# year either, based on the number of responses I have got from users
+# (when my site claimed Cuba will end DST on lastSun/October)
+
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	Cuba	1928	only	-	Jun	10	0:00	1:00	D
 Rule	Cuba	1928	only	-	Oct	10	0:00	0	S
@@ -2126,7 +2131,7 @@ Rule	Cuba	1997	only	-	Oct	12	0:00s	0	S
 Rule	Cuba	1998	1999	-	Mar	lastSun	0:00s	1:00	D
 Rule	Cuba	1998	2003	-	Oct	lastSun	0:00s	0	S
 Rule	Cuba	2000	max	-	Apr	Sun>=1	0:00s	1:00	D
-Rule	Cuba	2006	max	-	Oct	lastSun	0:00s	0	S
+Rule	Cuba	2007	max	-	Oct	lastSun	0:00s	0	S
 
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	America/Havana	-5:29:28 -	LMT	1890
@@ -2289,11 +2294,16 @@ Zone America/Port-au-Prince -4:49:20 -	L
 # <http://www.elheraldo.hn/nota.php?nid=54941&sec=12>.
 # It mentions executive decree 18-2006.
 
+# From Steffen Thorsen (2006-08-17):
+# Honduras will observe DST from 2007 to 2009, exact dates are not
+# published, I have located this authoritative source:
+# http://www.presidencia.gob.hn/noticia.aspx?nId=47
+
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	Hond	1987	1988	-	May	Sun>=1	0:00	1:00	D
 Rule	Hond	1987	1988	-	Sep	lastSun	0:00	0	S
-Rule	Hond	2006	only	-	May	Sun>=1	0:00	1:00	D
-Rule	Hond	2006	only	-	Aug	Mon>=1	0:00	0	S
+Rule	Hond	2006	2009	-	May	Sun>=1	0:00	1:00	D
+Rule	Hond	2006	2009	-	Aug	Mon>=1	0:00	0	S
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone America/Tegucigalpa -5:48:52 -	LMT	1921 Apr
 			-6:00	Hond	C%sT
===================================================================
RCS file: RCS/tz-link.htm,v
retrieving revision 2006.4
retrieving revision 2006.4.0.1
diff -pu -r2006.4 -r2006.4.0.1
--- tz-link.htm	2006/08/21 13:56:09	2006.4
+++ tz-link.htm	2006/08/22 07:40:41	2006.4.0.1
@@ -8,7 +8,7 @@
 <meta http-equiv="Content-type" content='text/html; charset="US-ASCII"'>
 <meta name="DC.Creator" content="Eggert, Paul">
 <meta name="DC.Contributor" content="Olson, Arthur David">
-<meta name="DC.Date" content="2006-08-11">
+<meta name="DC.Date" content="2006-08-22">
 <meta name="DC.Description"
  content="Sources of information about time zones and daylight saving time">
 <meta name="DC.Identifier" content="http://www.twinsun.com/tz/tz-link.htm">
@@ -35,7 +35,8 @@ href="http://en.wikipedia.org/wiki/Coord
 title="Coordinated Universal Time">UTC</abbr></a> offsets, and
 <a href="http://en.wikipedia.org/wiki/Daylight_saving">daylight-saving</a>
 rules.
-This database (often called <code>tz</code> or <code>zoneinfo</code>)
+This database (often called <code>tz</code> or <a
+href="http://en.wikipedia.org/wiki/Zoneinfo"><code>zoneinfo</code></a>)
 is used by several implementations,
 including
 <a href="http://www.gnu.org/software/libc/">the
@@ -101,9 +102,11 @@ 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
 mailing list</a>. You can also <a
-href="mailto:tz-request at elsie.nci.nih.gov">subscribe</a> to the
-mailing list, retrieve the <a
-href="ftp://elsie.nci.nih.gov/pub/tzarchive.gz">archive of old
+href="http://news.gmane.org/gmane.comp.time.tz/">browse recent
+messages</a> sent to the mailing list, <a
+href="mailto:tz-request at elsie.nci.nih.gov">subscribe</a> to it,
+retrieve the <a
+href="ftp://elsie.nci.nih.gov/pub/tzarchive.gz">full archive of old
 messages</a> (in gzip compressed format), or retrieve <a
 href="ftp://munnari.oz.au/pub/oldtz/">archived older versions of code
 and data</a>; there is also a smaller <a
@@ -125,6 +128,8 @@ throughout the world.</li>
 href="http://www.convertit.com/Go/ConvertIt/World_Time/Current_Time.ASP">Current
 Time in 1000 Places</a></li>
 <li><a href="http://timezoneconverter.com/">Time Zone Converter</a></li>
+<li><a href="http://home.tiscali.nl/~t876506/TZworld.html">Complete
+timezone information for all countries</a></li>
 </ul></li>
 <li><a href="http://www.timeanddate.com/worldclock/">The World Clock -
 Time Zones</a>
@@ -144,10 +149,6 @@ covers time zone
 data; see its VTIMEZONE calendar component.
 The <a href="http://www.calconnect.org/">Calendaring and Scheduling
 Consortium</a> is promoting further work in this area. <a
-href="ftp://ftp.rfc-editor.org/internet-drafts/draft-royer-ical-basic-04.txt">iCalendar
-Basic</a> is a draft simplified definition that omits VTIMEZONE due to
-its complexity, but this removal is expected to appear as an
-independent specification later. <a
 href="http://www.calconnect.org/publications/icalendartimezoneproblemsandrecommendationsv1.0.pdf">iCalendar
 TIMEZONE Problems and Recommendations</a> offers guidelines and
 recommendations for the use of VTIMEZONE and <code>tz</code>.</li>
@@ -158,9 +159,7 @@ strategy for defining and deploying a ti
 registration process that would establish unique names for each
 version of each <code>tz</code> zone, along with a polygonal
 representation of the geographical area corresponding to the
-zone. It builds on a (now-expired) <a
-href="http://ietfreport.isoc.org/idref/draft-royer-timezone-registry/">Time
-Zone Registry</a> draft proposal.</li>
+zone.</li>
 <li>The <a
 href="http://lists.w3.org/Archives/Public/www-rdf-calendar/">www-rdf-calendar</a>
 list discusses <a
@@ -170,13 +169,6 @@ and group scheduling systems, and has a 
 href="http://www.w3.org/2002/12/cal/#tzd">workspace on time zone
 data</a> converted from <code>tz</code>. An earlier <a
 href="http://www.w3.org/2000/01/foo">schema</a> was sketched out.</li>
-<li><a
-href="ftp://ftp.rfc-editor.org/internet-drafts/draft-royer-calsch-xcal-03.txt"><abbr
-title="iCalendar in XML Format">xCal-Basic</abbr></a>
-is a draft <a
-href="http://www.w3.org/XML/"><abbr
-title="Extensible Markup Language">XML</abbr></a> document type
-definition that corresponds to iCalendar.</li>
 </ul>
 <h2>Other <code>tz</code> compilers</h2>
 <ul>
@@ -245,9 +237,6 @@ and is widely used in <abbr>GNU</abbr>/L
 <li><a href="http://www.bmsi.com/java/#TZ">ZoneInfo.java</a>
 is a <code>tz</code> binary file reader written in Java.
 It is freely available under the <abbr>LGPL</abbr>.</li>
-<li><a href="http://s.keim.free.fr/tz/doc.html">Python time zones</a>
-is a <code>tz</code> binary file reader written in Python.
-It is freely available under a <abbr>BSD</abbr>-style license.</li>
 <li>Tcl, mentioned above, also contains a
 <code>tz</code> binary file reader.</li>
 </ul>
@@ -262,9 +251,6 @@ under the <abbr>GPL</abbr>.</li>
 contain a copy of a subset of a recent <code>tz</code> database in a
 Java-specific format.</li>
 <li><a
-href="http://www1.tip.nl/~t876506/AboutTimeZonesHC.html">HyperCard
-time zones calculator</a> was a HyperCard stack.</li>
-<li><a
 href="http://www.veladg.com/velaterra.html">VelaTerra</a> is
 a Mac OS X program. Its developers
 <a href="http://www.veladg.com/tzoffer.html">offer free
@@ -275,7 +261,7 @@ Microsoft Windows program.</li>
 </ul>
 <h2>Other time zone databases</h2>
 <ul>
-<li><a href="http://www.astro.com/cgi/aq.cgi?lang=e">Atlas Query</a>
+<li><a href="http://www.astro.com/cgi/aq.cgi">Atlas Query</a>
 is Astrodienst's Web version of Shanks's
 excellent time zone history atlases published in both <a
 href="http://astrocom.com/products/software.php?software_id=ibmwboth">computer</a>
@@ -304,17 +290,16 @@ gives current time zone rules for airpor
 an undocumented format, with IDs that can be mapped to <code>TZ</code>
 values using the <a
 href="http://unicode.org/cldr/data/diff/supplemental/supplemental.html#windows___tzid">Windows
-→ Tzid table</a> maintained by the <a
-href="http://unicode.org/cldr/">Unicode Common Locale Data Repository
-(<abbr title="Common Locale Data Repository">CLDR</abbr>)
-Project</a>.</li>
+→ Tzid table</a> maintained by the <abbr
+title="Common Locale Data Repository">CLDR</abbr> data mentioned
+below.</li>
 </ul>
 <h2>Maps</h2>
 <ul>
-<li>The <a href="http://www.odci.gov/">United States Central
+<li>The <a href="https://www.cia.gov/">United States Central
 Intelligence Agency (<abbr
 title="Central Intelligence Agency">CIA</abbr>)</a> publishes a <a
-href="http://www.odci.gov/cia/publications/factbook/reference_maps/pdf/time_zones.pdf">time
+href="https://www.cia.gov/cia/publications/factbook/reference_maps/pdf/time_zones.pdf">time
 zone map</a>; the
 <a
 href="http://www.lib.utexas.edu/maps/world.html">Perry-Castañeda
@@ -336,7 +321,7 @@ but the maps are more up to date.</li>
 <li><a href="http://www.statoids.com/statoids.html">Administrative Divisions
 of Countries ("Statoids")</a> contains detailed lists of
 <code>tz</code>-related zone subdivision data.</li>
-<li><a href="http://home-4.tiscali.nl/~t876506/Multizones.html">Time
+<li><a href="http://home.tiscali.nl/~t876506/Multizones.html">Time
 zone boundaries for multizone countries</a> summarizes legal
 boundaries between time zones within countries.</li>
 <li>Manifold.net's <a
@@ -398,7 +383,7 @@ Portuguese)</a>.</dd>
 <dt>Canada</dt>
 <dd>The Institute for National Measurement Standards publishes current
 and some older information about <a
-href="http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php">Time
+href="http://inms-ienm.nrc-cnrc.gc.ca/time_services/daylight_saving_e.html">Time
 Zones & Daylight Saving Time</a>.</dd>
 <dt>Chile</dt>
 <dd>WebExhibits publishes a <a
@@ -446,7 +431,7 @@ href="http://www.srcf.ucam.org/~jsm28/br
 legal time in Britain</a> discusses in detail the country
 with perhaps the best-documented history of clock adjustments.
 The National Physical Laboratory also maintains an <a
-href="http://www.npl.co.uk/time/summer_time_archive.html">Archive
+href="http://www.npl.co.uk/time/measurement_time/summer_time_archive.html">Archive
 of Summer time dates</a>.</dd>
 </dl>
 <h2>Precision timekeeping</h2>
@@ -461,9 +446,9 @@ Time Protocol</a>
 discusses how to synchronize clocks of
 Internet hosts.</li>
 <li><a
-href="ftp://ftp.rfc-editor.org/internet-drafts/draft-ietf-dhc-timezone-option-02.txt">A
-Timezone Option for <abbr title="Dynamic Host Configuration
-Protocol">DHCP</abbr></a> proposes a <a
+href="ftp://ftp.rfc-editor.org/internet-drafts/draft-ietf-dhc-timezone-option-04.txt">A
+Timezone Option for <abbr title="Dynamic Host Configuration Protocol">DHCP</abbr></a>
+proposes a <a
 href="http://www.dhcp.org/">DHCP</a> option for a server to configure
 a client's time zone and daylight saving settings automatically.</li>
 <li><a href="http://gauss.gge.unb.ca/GMT.UT.and.the.RGO.html">A Few
@@ -517,15 +502,13 @@ href="http://www.mail-archive.com/leapse
 Second Discussion List</a> and <a
 href="http://rom.usno.navy.mil/archives/leapsecs.html">archive</a> covers <a
 href="http://gauss.gge.unb.ca/papers.pdf/gpsworld.november99.pdf">McCarthy
-and Klepczynski's proposal to discontinue leap seconds</a>, published in <a
-href="http://www.gpsworld.com/gpsworld/"><abbr
-title="Global Positioning System">GPS</abbr> World</a>
-<strong>10</strong>, 11
-(1999-11), 50–57 and discussed further in R. A. Nelson et al.,
+and Klepczynski's proposal to discontinue leap seconds</a>,
+discussed further in
 <a href="http://www.cl.cam.ac.uk/~mgk25/time/metrologia-leapsecond.pdf">The
-leap second: its history and possible future</a>,
-<a href="http://www.bipm.fr/metrologia/index.html">Metrologia</a>
-<strong>38</strong> (2001), 509–529.
+leap second: its history and possible future</a>.
+The <a href="http://www.aas.org/policy/LeapSecondCommittee.html"><abbr
+title="American Astronomical Society">AAS</abbr> Leap Second
+Committee</a> has solicited input on this proposal.
 <a href="http://www.ucolick.org/~sla/leapsecs/">The
 Future of Leap Seconds</a> covers this
 contentious issue.</li>
@@ -542,13 +525,14 @@ title="International Organization for St
 8601:2004 -- Data elements and interchange formats -- Information
 interchange -- Representation of dates and times</a>.</li>
 <li>
-<a href="http://www.w3.org/TR/xmlschema-2/#dateTime"><abbr>XML</abbr>
+<a href="http://www.w3.org/TR/xmlschema-2/#dateTime"><abbr
+title="Extensible Markup Language">XML</abbr>
 Schema: Datatypes - dateTime</a> specifies a format inspired by
-<abbr>ISO</abbr> 8601 that is in common use in <abbr>XML</abbr> data.</li>
+<abbr>ISO</abbr> 8601 that is in common use in <a
+href="http://www.w3.org/XML/"><abbr>XML</abbr></a> data.</li>
 <li>
-Section 3.3 of <a
-href="ftp://ftp.rfc-editor.org/in-notes/rfc2822.txt">Internet
-<abbr title="Request For Comments">RFC</abbr> 2822</a>
+<a href="ftp://ftp.rfc-editor.org/in-notes/rfc2822.txt">Internet <abbr
+title="Request For Comments">RFC</abbr> 2822</a> §3.3
 specifies the time notation used in email and <a
 href="ftp://ftp.rfc-editor.org/in-notes/rfc2616.txt"><abbr>HTTP</abbr></a>
 headers.</li>
@@ -565,16 +549,16 @@ formats.</li>
 <a href="http://www.exit109.com/~ghealton/y2k/yrexamples.html">The
 Best of Dates, the Worst of Dates</a> covers many problems encountered
 by software developers when handling dates and time stamps.</li>
-<li><a
-href="http://www-306.ibm.com/software/globalization/icu/"><abbr>ICU</abbr></a>
-contains a mechanism for localizing time zone
-labels and abbreviations; for example, one can use it to specify
-Russian translations for "Eastern European Summer Time",
-"<abbr title="Eastern European Summer Time">EEST</abbr>",
-and <code>Europe/Bucharest</code>.
-For example, the <a
-href="http://unicode.org/cldr/data/diff/by_type/dates_timeZoneNames.html"><abbr>CLDR</abbr> Sideways Data for dates_timeZoneNames</a>
-shows values for time zone names in many locales.</li>
+<li>The <a
+href="http://unicode.org/cldr/">Unicode Common Locale Data Repository
+(<abbr>CLDR</abbr>) Project</a> has localizations for time zone names,
+abbreviations, identifiers, and formats. For example, it contains
+French translations for "Eastern European Summer Time", "<abbr
+title="Eastern European Summer Time">EEST</abbr>", and
+"Bucharest". <a
+href="http://unicode.org/cldr/data/charts/by_type/names.zone.html">By-Type
+Chart: names.zone</a> shows these values for many locales.
+<abbr>ICU</abbr> contains a mechanism for using this data.</li>
 <li>Alphabetic time zone abbreviations should not be used as unique
 identifiers for <abbr>UTC</abbr> offsets as they are ambiguous in
 practice. For example, "<abbr>EST</abbr>" denotes 5 hours behind



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