Google (<a href="http://translate.google.com/">http://translate.google.com/</a>) translates the original request as:<div><br></div><div><div class="result-header" style="height:33px"><span class="target-lang" style="display:inline-block;margin-bottom:4px;margin-top:3px;vertical-align:top;background-color:rgba(255,255,255,0)"><font size="2">ENGLISH</font></span><div class="starbutton jfk-button-flat jfk-button" tabindex="0" style="border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;text-align:center;height:21px;min-width:0px;outline:0px;padding:11px;border:1px solid transparent;display:inline-block;float:right"><font size="2"><span style="background-color:rgba(255,255,255,0)"><div class="jfk-button-img" style="display:inline-block;background-image:-webkit-image-set(url(https://ssl.gstatic.com/translate/1x_mobile.png) 1x,url(https://ssl.gstatic.com/translate/2x_mobile.png) 2x);height:24px!important;width:24px!important;vertical-align:middle;background-repeat:no-repeat no-repeat"></div></span></font></div></div><div class="text-wrap" style="min-height:18px"><a href="mailto:?body=Hello!%0AWhere%20can%20you%20find%20a%20more%20complete%20DST%20%2F%20LMT%20time%20change%20for%20Latvia%3F%0A%0ASincerely%20I.%20Zagorskis" target="_top" class="result-mail" style="float:right;height:48px;width:48px"><font color="#000000" size="2"><span class="result-mail-icon" style="display:inline-block;height:24px;margin-left:12px;margin-top:12px;width:24px;background-image:-webkit-image-set(url(https://ssl.gstatic.com/translate/1x_mail_w.png) 1x,url(https://ssl.gstatic.com/translate/2x_mail_w.png) 2x);background-repeat:no-repeat no-repeat;background-color:rgba(255,255,255,0)"></span></font></a><div class="translation" style="padding-right:32px;direction:ltr"><font size="2"><span style="background-color:rgba(255,255,255,0)">Hello! Where can you find a more complete DST / LMT time change for Latvia? Sincerely I. Zagorskis</span></font></div><div class="translation" style="padding-right:32px;direction:ltr"><font size="2"><span style="background-color:rgba(255,255,255,0)"><br></span></font></div><div class="translation" style="padding-right:32px;direction:ltr"><font size="2"><span style="background-color:rgba(255,255,255,0)">It also identified the source language automatically.  Paul&#39;s answer is basically on target for that.</span></font></div></div></div><div><br></div><div><br><br>On Sunday, May 24, 2015, Paul Eggert &lt;<a href="mailto:eggert@cs.ucla.edu">eggert@cs.ucla.edu</a>&gt; wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Ivars Zagorskis wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Labdien!<br>
</blockquote>
<br>
Hello!  Unfortunately I can&#39;t read Latvian, but I guess you&#39;re asking about sources of information for timekeeping in Latvia.  All that we know is in the &#39;europe&#39; file in the tzdata distribution.  I suggest looking there, near the Europe/Riga entry.  You can find a copy of the latest experimental version here:<br>
<br>
<a href="https://github.com/eggert/tz/blob/master/europe" target="_blank">https://github.com/eggert/tz/blob/master/europe</a><br>
<br>
If you have better data please let us know.  Thanks.<br>
</blockquote></div><br><br>-- <br><div dir="ltr">Jonathan Leffler &lt;<a href="mailto:jonathan.leffler@gmail.com" target="_blank">jonathan.leffler@gmail.com</a>&gt;  #include &lt;disclaimer.h&gt;<br>Guardian of DBD::Informix - v2013.0521 - <a href="http://dbi.perl.org" target="_blank">http://dbi.perl.org</a><br>&quot;Blessed are we who can laugh at ourselves, for we shall never cease to be amused.&quot;</div><br>