gistfile1.htm

<div class='tt-calendar'>

  <span class="vevent">
   <a class="url" href="http://www.web2con.com/">http://www.web2con.com/</a>
    <span class="summary">Web 2.0 Conference</span>: 
    <span class="dtstart" title="2010-03-03T19:30+00:00">3 March 2010 at 19:30</span>
    <span class="dtend" title="2010-03-06T18:30+00:00">6 March 2010 at 18:30</span>
    <span class="location">Argent Hotel, San Francisco, CA</span>
  </span>
  ...

</div>


(see http://microformats.org/wiki/value-class-pattern#Date_and_time_parsing)