app
        .directive('ngModelAsDate', function () {
            return {
                restrict: 'A',
                require: '?ngModel',
                link: function (scope, element, attrs, ngModel) {
                    ngModel.$formatters.push(function (modelValue) {
                        if (angular.isString(modelValue)) {
                            return new Date(modelValue);
                        }
                        return modelValue;
                    });
                }
            };
        });