title: How to convert Format for Date and Time in Sencha Touch?
body: <p>In Sencha Touch 2 I have a model with the following fields, DateTimeStart if rendered in a List it shows in this format</p>
  
  <pre><code>Mon Feb 11 2013 11:55:00 GMT +100 (W. Europe Standard Time)
  </code></pre>
  
  <p>I need to create another field (<code>DateTimeStartConverted</code>) based on <code>DateTimeStart</code> 
  I need to convert such date in a more short format using 'Y-m-d'.</p>
  
  <p>Printing the result of DateTimeStartConverted in my conversion method it does not display any result (no errors has been throw).</p>
  
  <p>Any idea how to fix it?</p>
  
  <pre><code>{
     name: 'DateTimeStart',
     type: 'date',
     dateFormat: 'MS'
  }, {
     name: 'DateTimeStartConverted',
     type: 'date',
     convert: function(value, record){
         var jsonDate  = record.get('DateTimeStart'); 
         return  Ext.Date.format(jsonDate, 'Y-m-d');
     }
  }
  </code></pre>