[tz] [PROPOSED 7/7] Update tz-link.htm links

Thu Feb 23 09:06:45 UTC 2017

* tz-link.htm: Update URLs.  Prefer https: to ftp: for security.
Remove broken links to worldtime.io and solarsystem.nasa.gov.
Remove links to Shanks books, which are out of print.
Add links to RFC 7946 and to GeoPlanet.
---
 tz-link.htm | 65 +++++++++++++++++++++++++++----------------------------------
 1 file changed, 29 insertions(+), 36 deletions(-)

diff --git a/tz-link.htm b/tz-link.htm
index 1d15424..8f8235f 100644
--- a/tz-link.htm
+++ b/tz-link.htm
@@ -10,11 +10,11 @@
  content="Sources for time zone and daylight saving time data">
 <meta name="DC.Creator" content="Eggert, Paul">
 <meta name="DC.Contributor" content="Olson, Arthur David">
-<meta name="DC.Date" content="2016-12-12">
+<meta name="DC.Date" content="2017-02-23">
 <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">
+ content="https://www.iana.org/time-zones/repository/tz-link.htm">
 <meta name="Keywords"
  content="database,daylight saving,DST,time zone,timezone,tz,zoneinfo">
 </head>
@@ -65,10 +65,9 @@ title="Advanced Interactive eXecutive">AIX</abbr></a>,
 <a href="https://en.wikipedia.org/wiki/BlackBerry_10">BlackBerry 10</a>,
 <a href="http://www.apple.com/ios/"><abbr
 title="iPhone OS">iOS</abbr></a>,
-<a href="http://www.apple.com/macos/"><abbr
-title="Mac Operating System">macOS</abbr></a>,
+<a href="http://www.apple.com/macos/">macOS</a>,
 <a href="https://www.microsoft.com/en-us/windows">Microsoft Windows</a>,
-<a href="http://www.hp.com/go/openvms/">Open<abbr
+<a href="https://www.hpe.com/info/openvms">Open<abbr
 title="Virtual Memory System">VMS</abbr></a>,
 <a href="https://www.oracle.com/database/index.html">Oracle Database</a>, and
 <a href="https://www.oracle.com/solaris">Oracle Solaris</a>.</p>
@@ -113,20 +112,22 @@ the latest release's two
 to a <abbr>GNU</abbr>/Linux or similar host.</p>
 <pre style="margin-left: 2em"><code>mkdir tzdb
 cd tzdb
-<a href="https://www.gnu.org/software/wget/">wget</a> --retr-symlinks 'ftp://ftp.iana.org/tz/tz*-latest.tar.gz'
+<a href="https://www.gnu.org/software/wget/">wget</a> https://www.iana.org/time-zones/repository/tzcode-latest.tar.gz
+wget https://www.iana.org/time-zones/repository/tzdata-latest.tar.gz
 <a href="https://www.gnu.org/software/gzip/">gzip</a> -dc tzcode-latest.tar.gz | <a href="https://www.gnu.org/software/tar/">tar</a> -xf -
 gzip -dc tzdata-latest.tar.gz | tar -xf -
 </code></pre>
 <p>Alternatively, the following shell commands download the same
 release in a single-tarball format containing extra data
 useful for regression testing:</p>
-<pre style="margin-left: 2em"><code>wget <a href="ftp://ftp.iana.org/tz/tzdb-latest.tar.lz">ftp://ftp.iana.org/tz/tzdb-latest.tar.lz</a>
+<pre style="margin-left: 2em"><code>wget <a href="https://www.iana.org/time-zones/repository/tzdb-latest.tar.lz">https://www.iana.org/time-zones/repository/tzdb-latest.tar.lz</a>
 <a href="http://www.nongnu.org/lzip/">lzip</a> -dc tzdb-latest.tar.lz | tar -xf -
 </code></pre>
-<p>These commands use convenience links to the latest of the
-<a href="ftp://ftp.iana.org/tz/releases/"><abbr
-title="File Transfer Protocol">FTP</abbr> releases</a>
-of the <code><abbr>tz</abbr></code> database.
+<p>These commands use convenience links to the latest release
+of the <code><abbr>tz</abbr></code> database hosted by the
+<a href="https://www.iana.org/time-zones">Time Zone Database website</a>
+of the <a href="https://www.iana.org">Internet Assigned Numbers
+Authority (IANA)</a>.
 Older releases are in files named
 <code>tzcode<var>V</var>.tar.gz</code>,
 <code>tzdata<var>V</var>.tar.gz</code>, and
@@ -138,10 +139,10 @@ then <samp>za</samp> through <samp>zz</samp>, then <samp>zza</samp>
 through <samp>zzz</samp>, and so on).
 Since version 2016h, each release has contained a text file named
 "<samp>version</samp>" whose first (and currently only) line is the version.
-The releases can also be obtained from the
-<a href="http://www.iana.org/time-zones">Time Zone Database website</a>
-of the <a href="http://www.iana.org">Internet Assigned Numbers
-Authority (IANA)</a>.</p>
+The releases are also available in an
+<a href="ftp://ftp.iana.org/tz/releases/"><abbr
+title="File Transfer Protocol">FTP</abbr> directory</a> via a
+less-secure protocol .</p>
 <p>Alternatively, a development repository of code and data can be
 retrieved from <a href="https://github.com">GitHub</a> via the shell
 command:</p>
@@ -166,7 +167,7 @@ send changes to the <a href="mailto:tz at iana.org">time zone
 mailing list</a>. You can also <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
+href="https://mm.icann.org/pipermail/tz/">archive of old
 messages</a>.</p>
 <p>
 If your government plans to change its time zone boundaries or
@@ -243,9 +244,6 @@ Worldwide</a> lets you sort zone names and convert times.</li>
 calculates the current time difference between locations.</li>
 <li><a href="http://www.wx-now.com">Weather Now</a> lists the weather too.</li>
 <li><a href="http://www.thetimenow.com">The Time Now</a> also lists weather.</li>
-<li><a href="https://worldtime.io">worldtime.io</a>
-also contains data about time zone boundaries; it supports queries via place
-names and shows location maps.</li>
 </ul>
 <h2 id="protocols">Network protocols for <code><abbr>tz</abbr></code> data</h2>
 <ul>
@@ -502,7 +500,7 @@ download, compile and use <code>tz</code> releases. The Basic version
 is free.</li>
 <li><a
 href="http://veladg.com/velaterra.html">VelaTerra</a> is
-an <abbr>OS X</abbr> program. Its developers
+a macOS program. Its developers
 <a href="http://veladg.com/tzoffer.html">offer free
 licenses</a> to <code><abbr>tz</abbr></code> contributors.</li>
 </ul>
@@ -510,14 +508,9 @@ licenses</a> to <code><abbr>tz</abbr></code> contributors.</li>
 <ul>
 <li><a href="http://www.astro.com/atlas">Time-zone Atlas</a>
 is Astrodienst's Web version of Shanks and Pottenger's
-time zone history atlases published in both <a
-href="http://astrocom.com/astrology-products/software/acs-atlas-software">computer</a>
-and book form (<a
-href="http://www.astrocom.com/astrology/books/american-atlas">one volume
-for the <abbr>US</abbr></a>, and <a
-href="http://www.astrocom.com/astrology/books/international-atlas">one for
-other locations</a>) by <a
-href="http://astrocom.com">Astro Computing Services</a>.
+time zone history atlases also published in <a
+href="http://astrocom.com/astrology-products/software/acs-atlas-software">software</a>
+form by <a href="http://astrocom.com">ACS-Starcrafts</a>.
 These atlases are extensive but unreliable, as Shanks appears to have
 guessed many <abbr>UT</abbr> offsets and transitions. The atlases cite no
 sources and do not indicate which entries are guesswork.</li>
@@ -586,8 +579,11 @@ sets of <code><abbr>tz</abbr></code> regions. This includes
 for all the world's regions</li>
 <li><a
 href="https://github.com/straup/whereonearth-timezone">Whereonearth-timezone</a>
-is in <a href="http://geojson.org">GeoJSON</a> form, and combines the
-the tz_world shapefiles with the GeoPlanet dataset.</li>
+is in <a href="https://tools.ietf.org/html/rfc7946">GeoJSON</a> format
+(Internet <abbr>RFC</abbr> 7946), and combines the
+the tz_world shapefiles with the
+<a href="https://developer.yahoo.com/geo/geoplanet/">GeoPlanet</a>
+dataset.</li>
 </ul></li>
 <li>Programmatic interfaces that map geographical coordinates via tz_world to
 <code><abbr>tz</abbr></code> regions include:
@@ -625,7 +621,7 @@ Commercial network API access is provided
 by <a href="https://askgeo.com">AskGeo</a>
 and <a href="https://www.geogarage.com/blog/news-1/post/geogarage-time-zone-api-31">GeoGarage</a>.
 Also, an <a
-href="http://mm.icann.org/pipermail/tz/2016-October/024309.html">experimental
+href="https://mm.icann.org/pipermail/tz/2016-October/024309.html">experimental
 server</a> is available for the TZDIST Geolocate Extension mentioned
 <a href="#TZDIST-Geolocate">above</a>.</li>
 <li>"<a
@@ -783,7 +779,7 @@ Times</a> explains more abstruse astronomical time scales like
 <abbr title="Barycentric Dynamic Time">TDB</abbr>.
 <a href="http://www.ucolick.org/~sla/leapsecs/timescales.html">Time
 Scales</a> goes into more detail, particularly for historical variants.</li>
-<li>The <a href="http://www.iau.org"><abbr
+<li>The <a href="https://www.iau.org"><abbr
 title="International Astronomical Union">IAU</abbr></a>'s <a
 href="http://www.iausofa.org"><abbr
 title="Standards Of Fundamental Astronomy">SOFA</abbr></a>
@@ -793,11 +789,8 @@ code for converting among time scales like
 <abbr title="International Atomic Time">TAI</abbr>,
 <abbr>TDB</abbr>, <abbr>TDT</abbr> and
 <abbr>UTC</abbr>.</li>
-<li><a href="http://solarsystem.nasa.gov/basics/bsf2-3.php">Basics of
-Space Flight &ndash; Reference Systems &ndash; Time Conventions</a>
-briefly explains interplanetary space flight timekeeping.</li>
 <li><a
-href="http://www.giss.nasa.gov/tools/mars24/help/notes.html">Mars24 Sunclock
+href="https://www.giss.nasa.gov/tools/mars24/help/notes.html">Mars24 Sunclock
 &ndash; Time on Mars</a> describes Airy Mean Time (<abbr>AMT</abbr>) and the
 diverse local time
 scales used by each landed mission on Mars.</li>
-- 
2.9.3

