How about Date::Calc? This allows you to input two different dates and get the difference. I used it for a "Baby Pool" for before my daughter was born (family members could bet on date, weight and gender. Here is a snippet of what I did: 

use Date::Calc qw(Delta_Days);

$day_diff{$name} = abs(Delta_Days(2000, $actual_month, $
actual_day, 2000, $guess_month, $guess_day));

[download]

From what I remember, the module was pretty flexible w/ how the date could be input.

Side Note: It appears that there are disagreeing opinions about the module. Test it and see how it fits for you...

bb

In reply to Re: Finding gaps in date ranges by birdbrane
in thread Finding gaps in date ranges by Ovid

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.