 @@ -1,72 +1,69 @@
 <!DOCTYPE html
 	PUBLIC "-//W3C//DTD HTML 4.01//EN"
 	"http://www.w3.org/TR/html4/strict.dtd">
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 <head>
 <title>Sources for Time Zone and Daylight Saving Time Data</title>
 <link rel="schema.DC" href="http://purl.org/DC/elements/1.1/">
 <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="2013-02-21">
+<meta name="DC.Date" content="2013-03-11">
 <meta name="DC.Description"
  content="Sources of information about time zones and daylight saving time">
 <meta name="DC.Identifier"
  content="http://www.iana.org/time-zones/repository/tz-link.htm">
 <meta name="Keywords"
  content="database,daylight saving,DST,time zone,timezone,tz,zoneinfo">
 </head>
 <body>
 <h1>Sources for Time Zone and Daylight Saving Time Data</h1>
 <p>
 This file is in the public domain, so clarified as of
 -05-17 by Arthur David Olson.
 </p>
 <p>
 Please send corrections to this web page to the
 <a href="mailto:tz@iana.org">time zone mailing list</a>.</p>
 <h2>The <code>tz</code> database</h2>
 <p>
 The <a href="http://en.wikipedia.org/wiki/Public_domain">public-domain</a>
 time zone database contains code and data
 that represent the history of local time
 for many representative locations around the globe.
 It is updated periodically to reflect changes made by political bodies
 to <a href="http://en.wikipedia.org/wiki/Time_zone">time zone</a>
 boundaries, <a
 href="http://en.wikipedia.org/wiki/Coordinated_Universal_Time"><abbr
 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>zoneinfo</code> or <a
-href="http://en.wikipedia.org/wiki/TZ_database"><code>tz</code></a>)
+href="http://en.wikipedia.org/wiki/Tz_database"><code>tz</code></a>)
 is used by several implementations,
 including
 <a href="http://www.gnu.org/software/libc/">the
 <abbr title="GNU's Not Unix">GNU</abbr>
-C Library</a> used in
+C Library</a> (used in
-<a href="http://www.linux.org/"><abbr>GNU</abbr>/Linux</a>,
+<a href="http://www.linux.org/"><abbr>GNU</abbr>/Linux</a>),
 <a href="http://www.android.com/">Android</a>,
 <a href="http://www.freebsd.org/">FreeBSD</a>,
 <a href="http://netbsd.org/">NetBSD</a>,
 <a href="http://openbsd.org/">OpenBSD</a>,
 <a href="http://cygwin.com/">Cygwin</a>,
 <a href="http://www.delorie.com/djgpp/"><abbr
 title="DJ's GNU Programming Platform">DJGPP</abbr></a>,
 <a href="http://en.wikipedia.org/wiki/WebOS">webOS</a>,
 <a href="http://ibm.com/aix">AIX</a>,
-<a href="http://www.apple.com/macosx/">Mac OS X</a>,
+<a href="http://en.wikipedia.org/wiki/BlackBerry_10">BlackBerry 10</a>,
 <a href="http://www.apple.com/ios/">iOS</a>,
 <a href="http://h71000.www7.hp.com/">OpenVMS</a>,
 <a href="http://oracle.com/database">Oracle Database</a>,
-<a href="http://sun.com/software/solaris">Solaris</a>,
+<a href="http://www.apple.com/osx/">OS X</a>,
 <a href="http://oracle.com/solaris">Solaris</a>,
 <a href="http://h30097.www3.hp.com/">Tru64</a>, and
 <a href="http://sco.com/products/unixware">UnixWare</a>.</p>
 <p>
 Each location in the database represents a national region where all
 clocks keeping local time have agreed since 1970.
 Locations are identified by continent or ocean and then by the name of
 the location, which is typically the largest city within the region.
 For example, <code>America/New_York</code>
 represents most of the <abbr title="United States">US</abbr> eastern time zone;
 <code>America/Phoenix</code> represents most of Arizona, which
 uses mountain time without daylight saving time (<abbr
 title="daylight saving time">DST</abbr>);
 <code>America/Detroit</code> represents most of Michigan, which uses
 @@ -83,26 +80,27 @@ the location's full name, e.g., TZ
 In the <code>tz</code> database's
 <a href="ftp://ftp.iana.org/tz/releases/"><abbr
 title="File Transfer Protocol">FTP</abbr> releases</a>
 the code is in the file <code>tzcode<var>C</var>.tar.gz</code>,
 where <code><var>C</var></code> is the code's version;
 similarly, the data are in <code>tzdata<var>D</var>.tar.gz</code>,
 where <code><var>D</var></code> is the data's version.
 Each version is a four-digit year followed by lower-case letters
 (a through z, then za through zz, then zza through zzz, and so on).
 Convenience links to
 the <a href="ftp://ftp.iana.org/tz/tzcode-latest.tar.gz">latest
 code</a> and
 <a href="ftp://ftp.iana.org/tz/tzdata-latest.tar.gz">latest data</a> revisions
 are also available.
 The following <a
 href="http://en.wikipedia.org/wiki/Unix_shell">shell</a> commands download
 these files to a <abbr>GNU</abbr>/Linux or similar host;
 see the downloaded
 <code>README</code> file for what to do next.</p>
 <pre style="margin-left: 2em"><code>mkdir tz
 cd tz
 <a href="http://www.gnu.org/software/wget/">wget</a> --retr-symlinks 'ftp://ftp.iana.org/tz/tz*-latest.tar.gz'
 <a href="http://www.gnu.org/software/gzip/">gzip</a> -dc tzcode-latest.tar.gz | <a href="http://www.gnu.org/software/tar/">tar</a> -xf -
 gzip -dc tzdata-latest.tar.gz | tar -xf -
 </code></pre>
 <p>
 The code and data files can also be obtained from the
 @@ -118,70 +116,68 @@ repository is less well tested and proba
 The code lets you compile the <code>tz</code> source files into
 machine-readable binary files, one for each location. It also lets
 you read a <code>tz</code> binary file and interpret time stamps for that
 location.</p>
 <p>
 The data are by no means authoritative. If you find errors, please
 send changes to the <a href="mailto:tz@iana.org">time zone
 mailing list</a>. You can also <a
 href="http://news.gmane.org/gmane.comp.time.tz">browse recent
 messages</a> sent to the mailing list, <a
 href="https://mm.icann.org/mailman/listinfo/tz">subscribe</a> to it,
 and browse the <a
 href="http://mm.icann.org/pipermail/tz/">archive of old
-+messages</a>.</p>
+messages</a>. For further information about updates, please see
 <a href="http://tools.ietf.org/html/rfc6557">Procedures for
 Maintaining the Time Zone Database</a> (Internet <abbr title="Request
 For Comments">RFC</abbr> 6557).</p>
 <p>
 The Web has several other sources for time zone and daylight saving time data.
 Here are some links that may be of interest.
 </p>
 <h2>Web sites using recent versions of the <code>tz</code> database</h2>
 <p>
 These are listed roughly in ascending order of complexity and fanciness.
 </p>
 <ul>
 <li><a href="http://twiki.org/cgi-bin/xtra/tzdatepick.html">Date and Time Gateway</a>
 lets you see the <code>TZ</code> values directly.</li>
 <li><a
 href="http://convertit.com/Go/ConvertIt/World_Time/Current_Time.ASP">Current
 Time in 1000 Places</a> uses descriptions of the values.</li>
 <li><a href="http://www.timezoneconverter.com/cgi-bin/tzc.tzc">Time Zone Converter</a>
 uses a pulldown menu.</li>
 <li><a href="http://home.tiscali.nl/~t876506/TZworld.html">Complete
 timezone information for all countries</a> displays tables of DST rules.
 <li><a href="http://timeanddate.com/worldclock/">The World Clock &ndash;
 Time Zones</a> lets you sort zone names and convert times.</li>
 <li><a href="http://permatime.com/">Permatime</a> generates and views
 links that refer to a particular point in time and can be displayed in
 multiple timezones.</li>
 <li><a href="http://daylight-savings-time.info/">Daylight Saving Time info</a>
-+shows a graph of time
+shows a graph of time
 difference versus time for any pair of locations.</li>
 <li>The <a href="http://worldtimeengine.com/">World Time Engine</a>
 also contains data about time zone boundaries; it supports queries via place
 names and shows location maps.</li>
 <li><a href="http://simpletimerclocks.mozdev.org/">Simple Timer + Clocks</a>
 is a Firefox add-on which uses a timezone data file generated from the
 tz data files.</li>
 </ul>
 <h2>Other time zone database formats</h2>
 <ul>
-<li>The <a href="ftp://ftp.rfc-editor.org/in-notes/rfc2445.txt">
+<li>The <a href="http://tools.ietf.org/html/rfc5545">
 Internet Calendaring and Scheduling Core Object Specification
-(iCalendar)</a>, Internet <abbr title="Request For
+(iCalendar)</a>, Internet <abbr>RFC</abbr> 5445
 Comments">RFC</abbr> 2445, published by the (now-concluded) <a
 href="http://ietf.org/html.charters/OLD/calsch-charter.html"><abbr
 title="Internet Engineering Task Force">IETF</abbr>
 Calendaring and Scheduling Working Group (<abbr
 title="Calendaring and Scheduling Working Group">calsch</abbr>)</a>
 covers time zone
 data; see its VTIMEZONE calendar component.
 <a href="http://calconnect.org/">CalConnect, The Calendaring and Scheduling
 Consortium</a> is promoting further work in this area. <a
 href="http://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>
 <li><a href="http://calconnect.org/dstlinks.shtml">Extended Daylight
 Saving Time Links, Advisories and Changes</a> lists vendor material on recent
 daylight saving time changes.</li>
 <li><a
 href="http://calconnect.org/publications/timezoneregistryandservicerecommendationsv1.0.pdf">Timezone
 Registry and Service Recommendations</a> discusses a
 @@ -229,105 +225,105 @@ transition in the tz databa
 Unicode (<abbr>ICU</abbr>)</a> contains C/C++ and <a
 href="http://en.wikipedia.org/wiki/Java_%28programming_language%29">Java</a>
 libraries for internationalization that
 has a compiler from <code>tz</code> source
 into an <abbr>ICU</abbr>-specific format.
 <abbr>ICU</abbr> is freely available under a
 <abbr title="Berkeley Software Distribution">BSD</abbr>-style license.</li>
 <li><a href="http://joda-time.sourceforge.net/">Joda Time - Java date
 and time <abbr title="Application Program Interface">API</abbr></a>
 contains a class
 <code>org.joda.time.tz.ZoneInfoCompiler</code> that compiles
 <code>tz</code> source into a Joda-specific binary format. Joda Time
 is freely available under a <abbr>BSD</abbr>-style license.</li>
 <li><a href="http://www.relativedata.com/time-zone-master">Time Zone
 Master</a> is a Microsoft Windows clock program that can automatically
 download, compile and use the <code>tzdata<var>D</var>.tar.gz</code>
 files as they are released. The Basic version is free.</li>
 <li><a href="http://pytz.sourceforge.net">PyTZ - Python Time
 Zone Library</a> compiles <code>tz</code> source into
 <a href="http://python.org/">Python</a>.
 It is freely available under a <abbr>BSD</abbr>-style license.</li>
 <li><a href="http://tzinfo.rubyforge.org/">TZInfo - Ruby Timezone Library</a>
 compiles <code>tz</code> source into
 <a href="http://ruby-lang.org">Ruby</a>.
 It is freely available under the <abbr
 title="Massachusetts Institute of Technology">MIT</abbr> license.</li>
 <li>The <a href="http://chronos-st.org/">Chronos Date/Time
 Library</a> is
 a <a href="http://en.wikipedia.org/wiki/Smalltalk">Smalltalk</a> class
 library that compiles <code>tz</code> source into a time zone repository whose format
 is either proprietary or an <a href="http://www.w3.org/XML/"><abbr
 title="Extensible Markup Language">XML</abbr></a>-encoded
 representation.</li>
 <li>Starting with version 8.5, <a href="http://tcl.tk/">Tcl</a>
 contains a developer-oriented parser that compiles <samp>tz</samp>
 source into text files, along with a runtime that can read those
 files. Tcl is freely available under a <abbr>BSD</abbr>-style
 license.</li>
 </ul>
 <h2>Other <code>tz</code> binary file readers</h2>
 <li><a href="http://search.cpan.org/perldoc?DateTime::TimeZone::Tzfile">
 DateTime::TimeZone::Tzfile</a>
 is a <code>tz</code> binary file reader written in Perl.
 It is freely available under the same terms as Perl
 (dual <abbr>GPL</abbr> and Artistic license).</li>
 <li>The
 public-domain <a href="https://github.com/dbaron/tz.js">tz.js</a>
 library contains a Python tool that converts <code>tz</code> binary data into
 <a href="http://www.json.org/">JSON</a>-format data suitable for use
 in its <a href="http://en.wikipedia.org/wiki/JavaScript">JavaScript</a> library for time zone conversion. Dates before 1970
 are not supported.</li>
 <ul>
 <li>The <a
 href="http://www.gnu.org/software/libc/"><abbr>GNU</abbr> C
 Library</a>
 has an independent, thread-safe implementation of
 a <code>tz</code> binary file reader.
 This library is freely available under the
 <a href="http://www.gnu.org/copyleft/lesser.html">
 <abbr>GNU</abbr> Lesser General Public License
 (<abbr title="Lesser General Public License">LGPL</abbr>)</a>,
 and is widely used in <abbr>GNU</abbr>/Linux systems.</li>
 <li><a href="http://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>Tcl, mentioned above, also contains a
 <code>tz</code> binary file reader.</li>
 <li><a href="http://search.cpan.org/perldoc?DateTime::TimeZone::Tzfile">
 DateTime::TimeZone::Tzfile</a>
 is a <code>tz</code> binary file reader written in Perl.
 It is freely available under the same terms as Perl
 (dual <abbr>GPL</abbr> and Artistic license).</li>
 <li>The
 public-domain <a href="https://github.com/dbaron/tz.js">tz.js</a>
 library contains a Python tool that converts <code>tz</code> binary data into
 <a href="http://www.json.org/">JSON</a>-format data suitable for use
 in its <a href="http://en.wikipedia.org/wiki/JavaScript">JavaScript</a> library for time zone conversion. Dates before 1970
 are not supported.</li>
 </ul>
 <h2>Other <code>tz</code>-based time zone software</h2>
 <ul>
 <li><a href="http://foxclocks.org/">FoxClocks</a>
 is an extension for <a href="http://google.com/chrome">Google
 Chrome</a> and for <a
 href="http://developer.mozilla.org/en/docs/Toolkit_API">Mozilla
 Toolkit</a> applications like <a
 href="http://mozilla.com/firefox">Firefox</a> and <a
 href="http://mozilla.com/thunderbird">Thunderbird</a>.
 It displays multiple clocks in the application window, and has a mapping
 interface to <a href="http://earth.google.com/">Google Earth</a>.
 It is freely available under the <abbr>GPL</abbr>.</li>
 <li><a
 href="http://users.skynet.be/Peter.Verthez/projects/intclock/">International
 clock (intclock)</a> is a multi-timezone clock for
 <abbr>GNU</abbr>/Linux and similar systems. It is freely available
 under the <abbr>GPL</abbr>.</li>
 <li><a href="http://www.oracle.com/us/technologies/java/overview/index.html">Oracle
 Java</a> releases since 1.4
 contain a copy of a subset of a recent <code>tz</code> database in a
 Java-specific format.</li>
 <li><a href="http://kimmo.suominen.com/sw/timezone/">Time Zone</a> is
 a <a href="http://wordpress.org/">WordPress</a> plugin. It is freely
 available under a <abbr>BSD</abbr>-style license.</li>
 <li><a href="http://www.relativedata.com/time-zone-master">Time Zone
 Master</a> is a Microsoft Windows clock program that can automatically
 download, compile and use the <code>tzdata<var>D</var>.tar.gz</code>
 files as they are released. The Basic version is free.</li>
 <li><a
 href="http://veladg.com/velaterra.html">VelaTerra</a> is
 a Mac OS X program. Its developers
 <a href="http://veladg.com/tzoffer.html">offer free
 licenses</a> to <code>tz</code> contributors.</li>
 <li><a
 href="http://worldtimeexplorer.com/">World Time Explorer</a> is a
 Microsoft Windows program.</li>
 </ul>
 <h2>Other time zone databases</h2>
 <ul>
 <li><a href="http://www.astro.com/cgi/aq.cgi">Atlas Query</a>
 is Astrodienst's Web version of Shanks and Pottenger's
 @@ -388,27 +384,26 @@ but the maps are more up to date.
 <ul>
 <li><a href="http://efele.net/maps/tz/">TZ timezone maps</a> contains a <a
 href="http://en.wikipedia.org/wiki/Shapefile">shapefile</a> of the
 <code>tz</code> regions in the world.</li>
 <li><a href="http://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.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
 href="http://manifold.net/info/freestuff.shtml">Free Stuff for
 Manifold System Users</a> includes a Manifold-format map of
 Data</a> includes a Manifold-format map of
 world time zone boundaries distributed under the
 <abbr>GPL</abbr>.</li>
 <li>The <abbr>US</abbr> Geological Survey's National Atlas of
 the United States
 publishes the <a href="http://nationalatlas.gov/mld/timeznp.html">Time
 Zones of the United States</a> in the public domain.</li>
 <li>The GeoCommunity lists several commercial sources for <a
 href="http://spatialnews.geocomm.com/features/timezones/">International
 Time Zones and Time Zone Data</a>.</li>
 <li>A ship within the <a
 href="http://en.wikipedia.org/wiki/Territorial_waters">territorial
 waters</a> of any nation uses that nation's time. In international
 waters, time zone boundaries are meridians 15&deg; apart, except that
 @@ -509,27 +504,27 @@ of Summer time dates.
 </dl>
 <h2>Precision timekeeping</h2>
 <ul>
 <li><a
 href="http://literature.agilent.com/litweb/pdf/5965-7984E.pdf">The
 Science of Timekeeping</a> is a thorough introduction
 to the theory and practice of precision timekeeping.</li>
 <li><a href="http://www.ntp.org/"><abbr
 title="Network Time Protocol">NTP</abbr>: The Network
 Time Protocol</a>
 discusses how to synchronize clocks of
 Internet hosts.</li>
 <li><a
-href="ftp://ftp.rfc-editor.org/in-notes/rfc4833.txt">Timezone
+href="http://tools.ietf.org/html/rfc4833">Timezone
 Options for <abbr title="Dynamic Host Configuration Protocol">DHCP</abbr></a>
 (Internet <abbr>RFC</abbr> 4833)
 specifies a <a
 href="http://en.wikipedia.org/wiki/Dynamic_Host_Configuration_Protocol">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
 Facts Concerning <abbr title="Greenwich Mean Time">GMT</abbr>, <abbr
 title="Universal Time">UT</abbr>, and
 the <abbr title="Royal Greenwich Observatory">RGO</abbr></a>
 answers questions like "What is the
 difference between <abbr>GMT</abbr> and <abbr>UTC</abbr>?"</li>
 <li><a
 @@ -586,33 +581,33 @@ contentious issue.
 <a href="http://www.cl.cam.ac.uk/~mgk25/iso-time.html">A Summary of
 the International Standard Date and Time Notation</a> is a good
 summary of
 <a
 href="http://www.iso.org/iso/catalogue_detail?csnumber=40874"><abbr
 title="International Organization for Standardization">ISO</abbr>
 :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>
 Schema: Datatypes - dateTime</a> specifies a format inspired by
 <abbr>ISO</abbr> 8601 that is in common use in XML data.</li>
 <li>
-<a href="ftp://ftp.rfc-editor.org/in-notes/rfc2822.txt">Internet
+<a href="http://tools.ietf.org/html/rfc5322">Internet
-Message Format</a> (Internet <abbr>RFC</abbr> 2822) &sect;3.3
+Message Format</a> (Internet <abbr>RFC</abbr> 5322) &sect;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>
+href="http://tools.ietf.org/html/rfc2616"><abbr>HTTP</abbr></a>
 headers.</li>
 <li>
-<a href="ftp://ftp.rfc-editor.org/in-notes/rfc3339.txt">Date and Time
+<a href="http://tools.ietf.org/html/rfc3339">Date and Time
 on the Internet: Timestamps</a> (Internet <abbr>RFC</abbr> 3339)
 specifies an <abbr>ISO</abbr> 8601
 profile for use in new Internet
 protocols.</li>
 <li>
 <a href="http://www.hackcraft.net/web/datetime/">Date &amp; Time
 Formats on the Web</a> surveys web- and Internet-oriented date and time
 formats.</li>
 <li>
 <a href="http://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>The <a
 @@ -650,15 +645,23 @@ any future changes to the rules. One sho
 <abbr>POSIX</abbr> <code>TZ</code> to a value like
 <code>"GMT-9"</code>, though, since this would falsely claim that
 local time is nine hours ahead of <abbr>UTC</abbr> and the time zone
 is called "<abbr>GMT</abbr>".</li>
 </ul>
 <h2>Related indexes</h2>
 <ul>
 <li><a href="tz-art.htm">Time and the Arts</a></li>
 <li><a href="http://www.dmoz.org/Reference/Time/">Open Directory -
 Reference: Time</a></li>
 <li><a href="http://dir.yahoo.com/Science/Measurements_and_Units/Time">Yahoo!
 Directory &gt; Science &gt; Measurements and Units &gt; Time</a></li>
 </ul>
 <hr>
 <address>
 This file is in the public domain, so clarified as of
 -05-17 by Arthur David Olson.
 <br>
 Please send corrections to this web page to the
 <a href="mailto:tz@iana.org">time zone mailing list</a>.
 </address>
 </body>
 </html>

 @@ -1,22 +1,22 @@
 # <pre>
 # This file is in the public domain, so clarified as of
 # 2009-05-17 by Arthur David Olson.
 # Package name for the code distribution.
 PACKAGE=	tzcode
 # Version numbers of the code and data distributions.
-VERSION=	2013a
+VERSION=	2013b
 # Email address for bug reports.
 BUGEMAIL=	tz@iana.org
 # Change the line below for your time zone (after finding the zone you want in
 # the time zone files, or adding it to a time zone file).
 # Alternately, if you discover you've got the wrong time zone, you can just
 #	zic -l rightzone
 # to correct things.
 # Use the command
 #	make zonenames
 # to get a list of the values you can use for LOCALTIME.