</abbr></code> source into <a href="https://www.perl.org">Perl</a>
modules. It is part of the Perl <a
href="https://github.com/houseabsolute/DateTime.pm/wiki">DateTime Project</a>,
which is freely
available under both the <abbr>GPL</abbr> and the Perl Artistic
License. DateTime::TimeZone also contains a script
<code>tests_from_zdump</code> that generates test cases for each clock
transition in the <code><abbr>tz</abbr></code> database.</li>
<li>The <a href="https://howardhinnant.github.io/date/tz.html">Time