* tz-link.html: Provide library URLs for Shanks and Pottenger’s now out-of-print atlases, since their publisher no longer maintains web pages. Link to ANS on these atlases as sources for much of the older tz data. Use <abbr> a bit more often. --- tz-link.html | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/tz-link.html b/tz-link.html index 4f456ef..924227a 100644 --- a/tz-link.html +++ b/tz-link.html @@ -551,8 +551,8 @@ Java</a> contains a copy of a subset of a recent Java-specific format.</li> <li><a href="https://relativedata.com/page/Time-Zone-Master">Time Zone Master</a> is a Microsoft Windows clock program that can automatically -download, compile and use <code>tz</code> releases. The Basic version -is free.</li> +download, compile and use <code><abbr>tz</abbr></code> releases. +The Basic version is free.</li> <li><a href="http://veladg.com/velaterra.html">VelaTerra</a> is a macOS program. Its developers @@ -563,10 +563,16 @@ licenses</a> to <code><abbr>tz</abbr></code> contributors.</li> <ul> <li><a href="https://www.astro.com/atlas">Time-zone Atlas</a> is Astrodienst's Web version of Shanks and Pottenger's out-of-print -time zone history atlases now published in <a +time zone history atlases +<a href="https://www.worldcat.org/oclc/468828649">for the US</a> and +<a href="https://www.worldcat.org/oclc/76950459">for the world</a>, +now published in <a href="https://astrocom.com/astrology-products/software/acs-atlas-software">software</a> form by <a href="https://astrocom.com">ACS-Starcrafts</a>. -These atlases are extensive but unreliable, as Shanks appears to have +Although these extensive atlases +<a href="https://astrologynewsservice.com/opinion/how-astrologers-contributed-to-the-information-age-a-brief-history-of-time/">were +sources for much of the older <code><abbr>tz</abbr></code> data</a>, +they are 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> <li><a href="https://en.wikipedia.org/wiki/HP-UX">HP-UX</a> has a database in @@ -856,14 +862,14 @@ href="https://www.iers.org/IERS/EN/Publications/Bulletins/bulletins.html"><abbr title="International Earth Rotation and Reference Systems Service">IERS</abbr> Bulletins</a> contains official publications of the International Earth Rotation and Reference Systems Service, which decides when leap -seconds occur. The <code>tz</code> code and data support leap seconds +seconds occur. The <code><abbr>tz</abbr></code> code and data support leap seconds via an optional "<code>right</code>" configuration, as opposed to the default "<code>posix</code>" configuration.</li> <li><a href="https://developers.google.com/time/smear">Leap Smear</a> discusses how to gradually adjust <abbr>POSIX</abbr> clocks near a leap second so that they disagree with <abbr>UTC</abbr> by at most a half second, even though every <abbr>POSIX</abbr> minute has exactly -sixty seconds. This approach works with the default <code>tz</code> +sixty seconds. This approach works with the default <code><abbr>tz</abbr></code> "<code>posix</code>" configuration, is <a href="http://bk1.ntp.org/ntp-stable/README.leapsmear">supported</a> by the <abbr>NTP</abbr> reference implementation, and is used by major -- 2.17.1