title: NSDate timeIntervalSince1970 not working in Swift?
body: <p>I am doing this in swift:</p>
  
  <pre><code>let date = NSDate(timeIntervalSince1970: 1432233446145.0)
  println("date is \(date)")
  </code></pre>
  
  <p>The log gives me this:</p>
  
  <pre><code> date is 47355-09-02 23:55:45 +0000
  </code></pre>
  
  <p>Then I try to get an interval back out just for testing:</p>
  
  <pre><code>let tI = expirationDate.timeIntervalSinceDate(date)
  println("tI = \(tI)")
  </code></pre>
  
  <p>I get:</p>
  
  <p>tI = 0.0</p>
  
  <p>What am I doing wrong?
  I can seem to make the timeIntervalSince1970 call work properly. Is there any known issued with that in Swift, or am I missing something here?</p>