Convert date to another timezone in JavaScript

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I am looking for a function to convert date in one timezone to another.

It need two parameters,

date (in format \"2012/04/10 10:10:30 +0000\")

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Happy的楠姐

2020-11-21 05:32

You can try this also for convert date timezone to India:

var indianTimeZoneVal = new Date().toLocaleString('en-US', {timeZone: 'Asia/Kolkata'});
var indainDateObj = new Date(indianTimeZoneVal);
indainDateObj.setHours(indainDateObj.getHours() + 5);
indainDateObj.setMinutes(indainDateObj.getMinutes() + 30);
console.log(indainDateObj);

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清歌不尽

2020-11-21 05:32

You can also use https://www.npmjs.com/package/ctoc_timezone

It has got much simple implementation and format customisation.

Changing format in toTimeZone:

CtoC.toTimeZone(new Date(),"EST","Do MMM YYYY hh:mm:ss #{EST}");

Output :

28th Feb 2013 19:00:00 EST

You can explore multiple functionalities in the doc.

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生来不讨喜

2020-11-21 05:35

Just set your desire country timezone and You can easily show in html it update using SetInteval() function after every one minut. function formatAMPM() manage 12 hour format and AM/PM time display.

$(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;
        }


    });

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日久生厌

2020-11-21 05:36

Okay, found it!

I'm using timezone-js. this is the code:

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

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佛祖请我去吃肉

2020-11-21 05:37

Here is my code, it is working perfectly, you can try with give below demo:

$(document).ready(function() {
   //EST
setInterval( function() {
var estTime = new Date();
 var currentDateTimeCentralTimeZone = new Date(estTime.toLocaleString('en-US', { timeZone: 'America/Chicago' }));
var seconds = currentDateTimeCentralTimeZone.getSeconds();
var minutes = currentDateTimeCentralTimeZone.getMinutes();
var hours =  currentDateTimeCentralTimeZone.getHours()+1;//new Date().getHours();
 var am_pm = currentDateTimeCentralTimeZone.getHours() >= 12 ? "PM" : "AM";

if (hours < 10){
     hours = "0" + hours;
}

if (minutes < 10){
     minutes = "0" + minutes;
}
if (seconds < 10){
     seconds = "0" + seconds;
}
    var mid='PM';
    if(hours==0){ //At 00 hours we need to show 12 am
    hours=12;
    }
    else if(hours>12)
    {
    hours=hours%12;
    mid='AM';
    }
    var x3 = hours+':'+minutes+':'+seconds +' '+am_pm
// Add a leading zero to seconds value
$("#sec").html(x3);
},1000);


});

<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
</head>
<body>
<p class="date_time"><strong id="sec"></strong></p>
</body>
</html>

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不知归路

2020-11-21 05:38

I recently did this in Typescript :

// fromTimezone example : Europe/Paris, toTimezone example: Europe/London
private calcTime( fromTimezone: string, toTimezone: string, dateFromTimezone: Date ): Date {
  const dateToGetOffset = new Date( 2018, 5, 1, 12 );

  const fromTimeString = dateToGetOffset.toLocaleTimeString( "en-UK", { timeZone: fromTimezone, hour12: false } );
  const toTimeString = dateToGetOffset.toLocaleTimeString( "en-UK", { timeZone: toTimezone, hour12: false } );

  const fromTimeHours: number = parseInt( fromTimeString.substr( 0, 2 ), 10 );
  const toTimeHours: number = parseInt( toTimeString.substr( 0, 2 ), 10 );

  const offset: number = fromTimeHours - toTimeHours;

  // convert to msec
  // add local time zone offset
  // get UTC time in msec
  const dateFromTimezoneUTC = Date.UTC( dateFromTimezone.getUTCFullYear(),
    dateFromTimezone.getUTCMonth(),
    dateFromTimezone.getUTCDate(),
    dateFromTimezone.getUTCHours(),
    dateFromTimezone.getUTCMinutes(),
    dateFromTimezone.getUTCSeconds(),
  );

  // create new Date object for different city
  // using supplied offset
  const dateUTC = new Date( dateFromTimezoneUTC + ( 3600000 * offset ) );

  // return time as a string
  return dateUTC;
}

I Use "en-UK" format because it is a simple one. Could have been "en-US" or whatever works.

If first argument is your locale timezone and seconde is your target timezone it returns a Date object with the correct offset.

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