所有这些答案都有点多余，但这对我来说是有效的，可以获得具有特定小时偏移量的当前Date对象。

function hourToMs(hour) { return hour * 60 * 1000 * 60; } function minToMs(min) { return min * 60 * 1000; } function getCurrentDateByOffset(offset) { // Get the current timezone in milliseconds to reset back to GMT aka +0 let timezoneOffset = minToMs((new Date()).getTimezoneOffset()); // get the desired offset in milliseconds, invert the value because javascript is dum let desiredOffset = hourToMs(offset * -1); return new Date(Date.now() + timezoneOffset - desiredOffset); } // -6 hours is central timezone console.log("The time is: " + getCurrentDateByOffset(-6));

无耻地窃取自:http://www.techrepublic.com/article/convert-the-local-time-to-another-time-zone-with-this-javascript/6016329

/** 
 * function to calculate local time
 * in a different city
 * given the city's UTC offset
 */
function calcTime(city, offset) {

    // create Date object for current location
    var d = new Date();
   
    // get UTC time in msec
    var utc = d.getTime();
   
    // create new Date object for different city
    // using supplied offset
    var nd = new Date(utc + (3600000*offset));
   
    // return time as a string
    return "The local time in " + city + " is " + nd.toLocaleString();
}

这个函数通过提供城市/国家的名称和偏移值来计算时区值

熟悉java 8的人java。Time包，或者joda-time可能会喜欢这个新产品:js-joda库。

安装

npm install js-joda js-joda-timezone --save

例子

<script src="node_modules/js-joda/dist/js-joda.js"></script>
<script src="node_modules/js-joda-timezone/dist/js-joda-timezone.js"></script>
<script>
var dateStr = '2012/04/10 10:10:30 +0000';
JSJoda.use(JSJodaTimezone);
var j = JSJoda;
// https://js-joda.github.io/js-joda/esdoc/class/src/format/DateTimeFormatter.js~DateTimeFormatter.html#static-method-of-pattern
var zonedDateTime = j.ZonedDateTime.parse(dateStr, j.DateTimeFormatter.ofPattern('yyyy/MM/dd HH:mm:ss xx'));
var adjustedZonedDateTime = zonedDateTime.withZoneSameInstant(j.ZoneId.of('America/New_York'));
console.log(zonedDateTime.toString(), '=>', adjustedZonedDateTime.toString());
// 2012-04-10T10:10:30Z => 2012-04-10T06:10:30-04:00[America/New_York]
</script>

在真正的java本质中，这是相当啰嗦的。但是，作为一个移植的java库，特别是考虑到他们移植了1800个左右的测试用例，它也可能非常准确地工作。

时间操作是很难的。这就是为什么许多其他库在边缘情况下存在bug。Moment.js的时区似乎是正确的，但我所见过的其他js库，包括时区-js，似乎不值得信赖。

只需设置你想要的国家时区，你可以很容易地在html中显示它更新使用setinterval()函数后每一分钟。函数formatAMPM()管理12小时格式和AM/PM时间显示。

$(document).ready(function(){
        var pakTime = new Date().toLocaleString("en-US", {timeZone: "Asia/Karachi"});
        pakTime = new Date(pakTime);

        var libyaTime = new Date().toLocaleString("en-US", {timeZone: "Africa/Tripoli"});
        libyaTime = new Date(libyaTime);



         document.getElementById("pak").innerHTML = "PAK  "+formatAMPM(pakTime);
         document.getElementById("ly").innerHTML = "LY   " +formatAMPM(libyaTime);

        setInterval(function(today) {
            var pakTime = new Date().toLocaleString("en-US", {timeZone: "Asia/Karachi"});
            pakTime = new Date(pakTime);

            var libyaTime = new Date().toLocaleString("en-US", {timeZone: "Africa/Tripoli"});
            libyaTime = new Date(libyaTime);


           document.getElementById("pak").innerHTML = "PAK  "+formatAMPM(pakTime);
           document.getElementById("ly").innerHTML = "LY  " +formatAMPM(libyaTime);

        },10000);

         function formatAMPM(date) {
            var hours = date.getHours();
            var minutes = date.getMinutes();
            var ampm = hours >= 12 ? 'pm' : 'am';
            hours = hours % 12;
            hours = hours ? hours : 12; // the hour '0' should be '12'
            minutes = minutes < 10 ? '0'+minutes : minutes;
            var strTime = hours + ':' + minutes + ' ' + ampm;
            return strTime;
        }


    });

我应该指出，我在可以使用的外部库方面受到了限制。moment.js和timezone-js不是我的选择。

我拥有的js日期对象是UTC。我需要在特定的时区(在我的例子中是“America/Chicago”)从这个日期获得日期和时间。

 var currentUtcTime = new Date(); // This is in UTC

 // Converts the UTC time to a locale specific format, including adjusting for timezone.
 var currentDateTimeCentralTimeZone = new Date(currentUtcTime.toLocaleString('en-US', { timeZone: 'America/Chicago' }));

 console.log('currentUtcTime: ' + currentUtcTime.toLocaleDateString());
 console.log('currentUtcTime Hour: ' + currentUtcTime.getHours());
 console.log('currentUtcTime Minute: ' + currentUtcTime.getMinutes());
 console.log('currentDateTimeCentralTimeZone: ' +        currentDateTimeCentralTimeZone.toLocaleDateString());
 console.log('currentDateTimeCentralTimeZone Hour: ' + currentDateTimeCentralTimeZone.getHours());
 console.log('currentDateTimeCentralTimeZone Minute: ' + currentDateTimeCentralTimeZone.getMinutes());

国际标准时间目前比“美国/芝加哥”早6小时。输出是:

currentUtcTime: 11/25/2016
currentUtcTime Hour: 16
currentUtcTime Minute: 15

currentDateTimeCentralTimeZone: 11/25/2016
currentDateTimeCentralTimeZone Hour: 10
currentDateTimeCentralTimeZone Minute: 15

好了，找到了!

我使用的是timezone-js。这是代码:

var dt = new timezoneJS.Date("2012/04/10 10:10:30 +0000", 'Europe/London');
dt.setTimezone("Asia/Jakarta");

console.debug(dt); //return formatted date-time in asia/jakarta