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since it is no longer maintained.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
More information about the tz
mailing list