采用YYYY-MM-DD hh:mm:ss格式:

var date = new Date('2011-06-29T16:52:48+00:00');
date.toString() // "Wed Jun 29 2011 09:52:48 GMT-0700 (PDT)"

要从YYYY-MM-DD hh:mm:ss格式转换，请确保您的日期遵循ISO 8601格式。

Year: 
    YYYY (eg 1997)    
Year and month: 
    YYYY-MM (eg 1997-07)
Complete date: 
    YYYY-MM-DD (eg 1997-07-16)
Complete date plus hours and minutes:
    YYYY-MM-DDThh:mmTZD (eg 1997-07-16T19:20+01:00)    
Complete date plus   hours, minutes and seconds:
    YYYY-MM-DDThh:mm:ssTZD (eg 1997-07-16T19:20:30+01:00)    
Complete date plus hours, minutes, seconds and a decimal fraction of a second
    YYYY-MM-DDThh:mm:ss.sTZD (eg 1997-07-16T19:20:30.45+01:00) where:

YYYY = four-digit year
MM   = two-digit month (01=January, etc.)
DD   = two-digit day of month (01 through 31)
hh   = two digits of hour (00 through 23) (am/pm NOT allowed)
mm   = two digits of minute (00 through 59)
ss   = two digits of second (00 through 59)
s    = one or more digits representing a decimal fraction of a second
TZD  = time zone designator (Z or +hh:mm or -hh:mm)

需要注意的重要事项

你必须用T分隔日期和时间，空格在某些浏览器中不起作用 您必须使用这种格式+hh:mm设置时区，使用字符串作为时区(例如:'UTC')将在许多浏览器中不起作用。+hh:mm表示与UTC时区的偏移量。

我创建了一个函数，将所有时区转换为本地时间。

我没有使用getTimezoneOffset()，因为它没有返回适当的偏移值

要求:

1. npm i moment-timezone

function utcToLocal(utcdateTime, tz) {
    var zone = moment.tz(tz).format("Z") // Actual zone value e:g +5:30
    var zoneValue = zone.replace(/[^0-9: ]/g, "") // Zone value without + - chars
    var operator = zone && zone.split("") && zone.split("")[0] === "-" ? "-" : "+" // operator for addition subtraction
    var localDateTime
    var hours = zoneValue.split(":")[0]
    var minutes = zoneValue.split(":")[1]
    if (operator === "-") {
        localDateTime = moment(utcdateTime).subtract(hours, "hours").subtract(minutes, "minutes").format("YYYY-MM-DD HH:mm:ss")
    } else if (operator) {
        localDateTime = moment(utcdateTime).add(hours, "hours").add(minutes, "minutes").format("YYYY-MM-DD HH:mm:ss")
    } else {
        localDateTime = "Invalid Timezone Operator"
    }
    return localDateTime
}

utcToLocal("2019-11-14 07:15:37", "Asia/Kolkata")

//Returns "2019-11-14 12:45:37"

在javascript中将字符串转换为日期之前，将'UTC'附加到字符串中:

var date = new Date('6/29/2011 4:52:48 PM UTC');
date.toString() // "Wed Jun 29 2011 09:52:48 GMT-0700 (PDT)"

根据@digitalbath的答案，下面是一个小函数，用于获取UTC时间戳，并在给定的DOM元素中显示本地时间(最后一部分使用jQuery):

https://jsfiddle.net/moriz/6ktb4sv8/1/

<div id="eventTimestamp" class="timeStamp">
   </div>
   <script type="text/javascript">
   // Convert UTC timestamp to local time and display in specified DOM element
   function convertAndDisplayUTCtime(date,hour,minutes,elementID) {
    var eventDate = new Date(''+date+' '+hour+':'+minutes+':00 UTC');
    eventDate.toString();
    $('#'+elementID).html(eventDate);
   }
   convertAndDisplayUTCtime('06/03/2015',16,32,'eventTimestamp');
   </script>

我写了一个漂亮的小脚本，它采用UTC纪元并将其转换为客户端系统时区，并以d/m/Y H: I:s(类似于PHP date函数)格式返回:

getTimezoneDate = function ( e ) {

    function p(s) { return (s < 10) ? '0' + s : s; }        

    var t = new Date(0);
    t.setUTCSeconds(e);

    var d = p(t.getDate()), 
        m = p(t.getMonth()+1), 
        Y = p(t.getFullYear()),
        H = p(t.getHours()), 
        i = p(t.getMinutes()), 
        s = p(t.getSeconds());

    d =  [d, m, Y].join('/') + ' ' + [H, i, s].join(':');

    return d;

};

在JavaScript中，我使用:

var updaated_time= "2022-10-25T06:47:42.000Z"

{{updaated_time | date: 'dd-MM-yyyy HH:mm'}} //output: 26-10-2022 12:00