Simple Angular.js filter for using the moment.js library

gistfile1.js

angular.module('myFilters', []).filter('momentjs', function() {

  return function(input, formatString) {
    var m = moment(input)
      , formatString = formatString || ''
      , out = '';

    if(m && m.isValid()) {
      if(formatString == 'calendar') {
        out = m.calendar();
      } else {
        out = m.format(formatString);
      }
    }

    return out;
  };
});