Use UTC timezone in Javascript date

Question

This is the code I currently have but I am struggling to convert it to UTC

var today = Date.UTC(new Date());
var dd = today.getDate();
var mm = today.getMonth()+1; //January is 0!
var yyyy = today.getFullYear();
var H = today.getHours();
var i = today.getMinutes();
var s = today.getSeconds();

if(dd<10) {
    dd = '0'+dd
} 

if(mm<10) {
    mm = '0'+mm
} 

today = yyyy + '-' + mm + '-' + dd + ' ' + H + ':' + i + ':' + s;

Any ideas on how I can get this working in the same timestamp format? Thanks!

Possible duplicate of How do you create a JavaScript Date object with a set timezone without using a string representation — Heretic Monkey
– Heretic Monkey, Commented Jul 6, 2018 at 14:22
Possible duplicate of How do you convert a JavaScript date to UTC? — Zenoo
– Zenoo, Commented Jul 6, 2018 at 14:22
I am trying that @HereticMonkey but i am having a hard time applying it to my code — Jake Stainer
– Jake Stainer, Commented Jul 6, 2018 at 14:27
Note the difference between the answer on that question, and what you have: The answer: new Date(Date.UTC()); your question: new Date.UTC(new Date()). — Heretic Monkey
– Heretic Monkey, Commented Jul 6, 2018 at 14:29
I tried that but then I get Uncaught TypeError: today.getDate is not a function @HereticMonkey — Jake Stainer
– Jake Stainer, Commented Jul 6, 2018 at 14:31

Alnitak · Accepted Answer · 2018-07-06 15:25:21Z

1

Date objects are always stored in UTC - the .getXxx() functions you're calling implicitly convert that UTC time into your local timezone.

To extract the relevant fields in UTC time instead you should be using the .getUTCxxx() family of functions.

//
// returns the date and time in format 'YYYY-MM-DD hh:mm:ss'
//
// will take a `Date` object, or use the current system
// time if none is supplied
//
function UTC_DateTime(date) {
    if (date === undefined) {
         date = new Date();
    }

    function pad2(n) {
        return (n < 10) ? ('0' + n) : n;
    }

    return date.getUTCFullYear() + '-' +
           pad2(date.getUTCMonth() + 1) + '-' +
           pad2(date.getUTCDay()) + ' ' +
           pad2(date.getUTCHours()) + ':' +
           pad2(date.getUTCMinutes()) + ':' +
           pad2(date.getUTCSeconds());
}

edited Jul 6, 2018 at 15:25

answered Jul 6, 2018 at 14:37

Alnitak

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1 Comment

Jake Stainer Over a year ago

Thanks you are a life saver!

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