<script src="https://cdn.staticfile.org/angular.js/1.6.6/angular.min.js"></script>

<div ng-app="">

  <span>{{1288323623006 | date:'medium'}}</span><br>

  <span>{{1288323623006 | date:'yyyy-MM-dd HH:mm:ss Z'}}</span><br>

  <span>{{'1288323623006' | date:'MM/dd/yyyy @ h:mma'}}</span><br>

  <span>{{'1288323623006' | date:"MM/dd/yyyy 'at' h:mma"}}</span><br>

</div>