title: How can I calculate the number of days between two dates in Perl?
body: <p>I want to calculate (using the default Perl installation only) the number of days between two dates. The format of both the dates are like so 04-MAY-09. (DD-MMM-YY)</p>
  <p>I couldn't find any tutorials that discussed that date format. Should I be building a custom date checker for this format? Further reading of the <a href="http://search.cpan.org/dist/Date-Calc" rel="noreferrer">Date::Calc</a> on CPAN it looks unlikely that this format is supported.</p>