In the distribution of the Olson database, the Theory file mentions &quot;Calendrical Calculations, Millennium Edition&quot; from 2001.<br><br>There is a new edition of the book available now:<br><br>Calendrical Calculations, 3rd Edn.&nbsp; 2008
<br>Nachum Dershowitz, Edward M Reingold<br>Cambridge University Press<br>ISBN 978-0-521-88540-9 (hardback)<br>ISBN 978-0-521-70238-6 (paperback)<br><br>Web sites: <a href="http://www.cambridge.org/9780521885409">http://www.cambridge.org/9780521885409
</a><br clear="all"><a href="http://www.calendarists.org/">http://www.calendarists.org/</a><br><br>(Note: the latter web site does not mention the 3rd Edn as of 2008-01-06; I&#39;m not clear whether it will be updated to do so.
<br>It does have an extensive set of errata for CCME on it.)<br><br>-- <br>Jonathan Leffler &lt;<a href="mailto:jonathan.leffler@gmail.com">jonathan.leffler@gmail.com</a>&gt; &nbsp;#include &lt;disclaimer.h&gt;<br>Guardian of DBD::Informix - 
v2007.0914 - <a href="http://dbi.perl.org">http://dbi.perl.org</a><br>&quot;Blessed are we who can laugh at ourselves, for we shall never cease to be amused.&quot;