<input type="text" datepicker-popup="dd.mm.yyyy" ng-model="dt" datepicker-options="dateOptions" ng-required="true">

evsDirectives.directive('dateParser', function () {
    return {
        restrict: 'A',
        require: 'ngModel',
        link: function (scope, element, attrs, ctrl) {
            if (!ctrl)
                return;

            ctrl.$parsers.unshift(function (data) {
                // convert data from view format to model format
                return this.parseEuropeanShortDate(data);
            });
        }
    };

    //parses a date in dd/MM/yyyy format
    //returns the input value if not a valid date
    parseEuropeanShortDate: function (d) {
        if (this.isDate(d)) {
            return d;
        }
        else {
            var fragments = d.split('/');
            var result = new Date(Date.UTC(fragments[2], fragments[1] - 1, fragments[0])); // converted
            return (this.isValidDate(result)) ? result : d;
        }
    }

});

<input type="text" datepicker-popup="dd.mm.yyyy" ng-model="dt" datepicker-options="dateOptions" ng-required="true" date-parser>