title: Convert milliseconds to NSDate
body: <p>I have this "1273636800000" and I want to convert it to this format "Wed Mar 03 2010 00:00:00 GMT-0500 (EST)"</p>
  
  <p>I need to convert this milliseconds to NSDate format.</p>
  
  <p>I tried this</p>
  
  <p><code>NSDate *tr = [NSDate dateWithTimeIntervalSince1970:1273636800000];</code></p>
  
  <p>and</p>
  
  <p><code>NSDate *tr = [NSDate dateWithTimeIntervalSinceReferenceDate:1273636800000];</code></p>
  
  <p>and</p>
  
  <p><code>NSDate *tr = [NSDate dateWithTimeIntervalSinceNow:1273636800000];</code></p>
  
  <p>But I can't get it to work, anyone had a similar problem and found the solution</p>