Varun的答案不考虑TimezoneOffset。以下是一个版本：

var d = new Date()
new Date(d.getTime() - d.getTimezoneOffset() * 60000).toJSON().slice(0, 10) // 2015-08-11

TimezoneOffset是分钟，而Date构造函数需要毫秒，因此乘以60000。

我认为这是一个老问题，但最简单的方法是：

var date = new Date();
var TimeStamp = date.toLocaleString();

function CurrentTime(){
  alert(TimeStamp);
}

这将获取当前时间，根据位置将其传递给字符串，然后您可以调用函数CurrentTime来显示时间。对我来说，这将是获取时间戳的最有效方法。

var date = new Date().toLocaleDateString("en-US");

此外，您可以使用两个参数调用方法toLocaleDateString：

var date = new Date().toLocaleDateString("en-US", {
    "year": "numeric",
    "month": "numeric"
});

有关MDN上此方法的详细信息。

更清洁、更简单的版本：

new Date().toLocaleString();

结果因用户的语言环境而异：

2017年2月27日上午9:15:41

你可以使用我下面给出的DATE API，每天使用日期格式以及获取当前日期、昨天等。如何使用例如

 var dt = new Date();  
       /// ANY DATE YOU WANT --  dt = new Date(""July 21, 1983 01:15:00"")

       dateObj = dt.getFormattedDate();

       alert( dateObj.isToday() );
       alert( dateObj.todayDay() );
       alert( dateObj.monthNameDayYear() );

(function () {

    fnDateProcessor = function () {
        var that = this;

        return {

            yyyymmdd: function (separator) {
                var fdate = this.formatDate(true, true) ,
                    separator = separator ? separator : "-";
                return fdate.year + separator + fdate.month + separator + fdate.day;
            },

            monthNameDayYear: function () {
                var fdate = this.formatDate(true, true);
                return fdate.monthName + " " + fdate.day + ", " + fdate.year;
            },

            ddmmyyyy: function (separator) {
                var fdate = this.formatDate(true, true) ,
                    separator = separator ? separator : "/";
                return fdate.day + separator + fdate.month + separator + fdate.year;
            },

            meridianTime: function () {
                var fdate = this.formatDate();
                return fdate.hour + ":" + fdate.minute + " " + fdate.meridian;
            },

            monthDay: function (separator) {

                var fdate = this.formatDate();
                separator = checkSeparator(separator);
                return fdate.monthName.substring(0, 3) + separator + fdate.day;

            },

            weekMonthDayYear: function () {
                var fdate = this.formatDate();
                //separator = checkSeparator(separator);

                return fdate.weekDay + " " + fdate.monthName.substring(0, 3) +
                    fdate.day + " ," + fdate.year;
            },

            timeZoneInclusive: function () {

                return new Date(that);
            },

            todayDay: function () { return new Date().getDate(); },
            todayMonth: function () { return new Date().getMonth() + 1; },
            dateDay: function () { return this.formatDate().day; },
            dateMonth: function () { return this.formatDate().month; },
            isToday: function () { return this.sameDate(new Date()); },
            isYesterday: function () {
                d = new Date(); d.setDate(d.getDate() - 1);
                return this.sameDate(d);
            },

            formatDate: function () {
                var zeroPaddedMnth = true, zeroPaddedDay = false,
                    zeroPaddedHr = false, zeroPaddedMin = true;
                // Possible to take Options arg that overide / merge to defaults

                var monthNames = [
                    "January", "February", "March",
                    "April", "May", "June", "July",
                    "August", "September", "October",
                    "November", "December"
                ];
                var weekDays = ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"];

                var day = getFormattedDay(that.getDate(), zeroPaddedDay);
                var monthIndex = that.getMonth();
                var month = getFormattedMonth(monthIndex + 1, zeroPaddedMnth);
                var year = that.getFullYear();
                var wkDay = that.getDay();
                var hour = getFormattedHour(that.getHours(), zeroPaddedHr);
                var minute = getFormattedMinute(that.getMinutes(), zeroPaddedMin);
                var meridian = getMeridian(that.getHours());

                return {
                    "day": day, "monthName": monthNames[monthIndex], "month": month,
                    "weekDay": weekDays[wkDay], "year": year, "hour": hour, "minute": minute,
                    "meridian": meridian
                };
            },

            compareDate: function (d2) {     /// validates if caller is less than argument                            
                d2 = _isString(d2) ? new Date(d2) : d2;

                return !this.sameDate(d2)
                    && typeof d2 != "number"
                    ? that < d2 : false;
            },

            sameDate: function (d) {
                return that.getFullYear() === d.getFullYear()
                    && that.getDate() === d.getDate()
                    && that.getMonth() === d.getMonth();
            },

            dateAfter: function (separator) {
                var fdate = this.formatDate();
                var separator = separator ? separator : "-";
                return fdate.year + separator + fdate.month + separator + (fdate.day + 1);
            }

        };

    };


    function _isString(obj) {
        var toString = Object.prototype.toString;
        return toString.call(obj) == '[object String]';
    }

    function checkSeparator(separator) {
        // NOT GENERIC ... NEEDS REVISION
        switch (separator) {
            case " ": sep = separator; break;
            case ",": sep = " ,"; break;
            default:
                sep = " "; break;
        }

        return sep;
    }

    function getFormattedHour(h, zeroPadded) {
        h = h % 12;
        h = h ? h : 12;    //  12 instead of 00
        return zeroPadded ? addZero(h) : h;
    }

    function getFormattedMinute(m, zeroPadded) {

        return zeroPadded ? addZero(m) : m;
    }

    function getFormattedDay(dd, zeroPadded) {

        return zeroPadded ? addZero(dd) : dd;
    }
    function getFormattedMonth(mm, zeroPadded) {

        return zeroPadded ? addZero(mm) : mm;
    }

    function getMeridian(hr) {

        return hr >= 12 ? 'PM' : 'AM';
    }

    function addZero(i) {
        if (i < 10) {
            i = "0" + i;
        }
        return i;
    }


    Date.prototype.getFormattedDate = fnDateProcessor;

} ());

您可以使用moment.js：http://momentjs.com/

var m=moment（）.格式（“DD/MM/YYYY”）；文件.写入（m）；<script src=“https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.14.1/moment.min.js“></script>