只要收到错误消息说它不是有效日期，就需要指定日期选择器的格式:

As far as getting an error saying it isn't a valid date, you'll need to specify the format of the datepicker:

        $(document).ready(function () {
            $("#PostTime").datepicker({
                showOn: 'both',
                dateFormat: 'dd/mm/yy',
                buttonImage: "/content/img/calendar_icon.png"
            });
        });