Angular.js has a built-in date filter.
// in your controller:
$scope.date="20140313T00:00:00";
// in your view, date property, filtered with date filter and format 'MM/dd/yyyy'
<p ng-bind="date | date:'MM/dd/yyyy'"></p>
// produces
03/13/2014
You can see the supported date formats in the source for the date filter.
edit:
If you’re trying to get the correct format in the datepicker (not clear if you’re using datepicker or just trying to use it’s formatter), those supported format strings are here: https://api.jqueryui.com/datepicker/