I always run all my timestamps through a function, since the JavaScript era is in milliseconds and the Stripe response era is in seconds.
$scope.timestamp = function(epoch){
return (epoch * 1000);
};
Then in your template:
<p>{{ timestamp(1397166153) | date }}</p>
Alternatively, if you just need to do this once, you can always do it inline:
<p>{{ (1397166153 * 1000) | date }}</p>