title: trying to format a jquery date
body: <p>I've got this jquery date field - where the users enters their DOB (date of birth) called 'startDob'.</p>
  
  <p>I'm adding 66years on to this value to show a retirement date ('retDate'), which looks like this:</p>
  
  <pre><code>var retDate = new Date(startDob.getFullYear() + 66, startDob.getMonth(), startDob.getDate());
  </code></pre>
  
  <p>the result looks unsavoury: </p>
  
  <pre><code>Wed Feb 08 2073 00:00:00 GMT+0000 (GMT Standard Time)
  </code></pre>
  
  <p>I've tried formatting like this:</p>
  
  <pre><code> $('#dateEnd').datepicker({dateFormat: 'dd.mm.yy'}); 
   $('#retDate').datepicker({dateFormat: 'dd.mm.yy'});
  </code></pre>
  
  <p>to no avail.
  when this box was an actual datepicker calendar box, I could format like so:</p>
  
  <blockquote>
    <p>dateFormat: "dd/mm/yy",</p>
  </blockquote>
  
  <p>but now I cannot format it at all. Any ideas please?</p>
  
  <p><a href="https://jsfiddle.net/z18ct2xe/2/" rel="nofollow noreferrer">here's my fiddle</a></p>