Two-way binding between form field and moment.js date object for angular.js. With validation.Date object is in UTC, form field displays local date.

angular_momentjs_binding_directive.js

  directive('dateBinding', function() {
    //var format = "YYYY-MM-DD HH:mm:ss"
    //date.isValid() is not enough for strict validation, see moment.js doc
    //var pattern = /^\s*\d{4}-\d{2}-\d{2}\s+\d{2}:\d{2}(:\d{2})?\s*$/
    var parseFormat = attrs.dateBinding;
    return {
      restrict: 'A',
      require: 'ngModel',
      link: function(scope, element, attr, ngModel) {
        ngModel.$parsers.push(function(text) {
          var date = moment(text, parseFormat)
          ngModel.$setValidity('dateInvalid', date.isValid()) //&& text.match(pattern))
          return date
        })
        ngModel.$formatters.push(function(datetime_moment) {
          return datetime_moment && datetime_moment.local().format(parseFormat)
        })
      }
    };
  })