title: Convert epoch time to NSDate with good timezone with Objective c
body: <p>how I can convert an epoch time value to NSDate. For example I use this value : 1310412600000. and I am in the EDT time zone.</p>
  
  <p>When I try this :</p>
  
  <pre><code>NSString *bar = [[NSDate dateWithTimeIntervalSince1970:epoch] description];
  </code></pre>
  
  <p>I got a wrong value...</p>
  
  <p>What is the good way? I spend a lot of time with that....</p>
  
  <p>Thanks</p>