title: datepicker date off by one day
body: <p>The date returned by date picker is off by one day.  Is it a problem in my code or is it a bug?</p>
  
  <p>The date sent to date_picker is 2012-03-21.  The date returned by datepicker is Tue Mar 20 2012.</p>
  
  <pre><code>    var end_date = end_calendar.getFormatedDate("%Y-%m-%d");
      end_date = $.datepicker.formatDate('D M dd yy', new Date(end_date));
  </code></pre>