title: How can I Add Time to a Date in jQuery
body: <p>How do I add 23 hrs 59 min. 59 secs to <code>end_date</code>? </p>
  
  <pre><code>var end_date = jQuery('#end_date_datepicker').datepicker('getDate');
  //pseudo-code:  end_date = (end_date + 23:59:59) 
  </code></pre>
  
  <p>I was thinking of trying to convert it to milliseconds, add 86 399 000 milliseconds, and then convert it back to time. But, I can't get it to work. </p>