title: Angular date filter not working with Stripe timestamp
body: <p>I have a timestamp supplied by Stripe's API. 1397166153.</p>
  
  <p>However when using it in the most simplest form <code>{{ 1397166153 | date }}</code> I get: Jan 17, 1970 when in fact it should be Apr 10, 2014.</p>
  
  <p>Does anyone know what's going on here?</p>
  
  <p>I really appreciate your help!</p>