Convert Date and Time into a UTC formatted Date - Javascript

Question

I have two variables, date & time...

var date = "2012-12-05";
var time = "18:00";

How can I format this into a UTC formatted date. This is so I can use it within the Facebook API..

Facebook states I need it in this format:

Precise-time (e.g., '2012-07-04T19:00:00-0700'): events that start at a particular point in time, in a specific offset from UTC. This is the way new Facebook events keep track of time, and allows users to view events in different timezones.

Any help would be much appreciated.. Thanks!

Possible duplicate of How to format a JavaScript date

John Slegers
– John Slegers

2016-02-19 21:45:32 +00:00
Commented Feb 19, 2016 at 21:45 — John Slegers
– John Slegers, Commented Feb 19, 2016 at 21:45

Krycke · Accepted Answer · 2012-09-11 15:38:59Z

1

This format is called ISO 8601

Do you know what timezone you are in? If you do, you can do like this:

var datetime = date + 'T' + time + ":00+0000';

if the timezone is +0.
if not, then:

var d = new Date()
var n = d.getTimezoneOffset();
var timeZone = Math.floor( Math.abs( n/60 ) );
var timeZoneString = (d.getTimezoneOffset() < 0 ? '-' : '+' ) + ( timeZone < 10 ? '0' + timeZone : timeZone ) + '00';

var datetime = date + 'T' + time + ':00' + timeZoneString;

Here is a fiddle: http://jsfiddle.net/ajySr/

edited Sep 11, 2012 at 15:38

answered Sep 11, 2012 at 15:24

Krycke

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2 Comments

Danny Over a year ago

Is there any way to automatically get the timezone?

Chase Over a year ago

There is the getTimezoneOffset function: developer.mozilla.org/en-US/docs/JavaScript/Reference/…

Community · Accepted Answer · 2017-05-23 11:59:28Z

Try the following:

var date = new Date(2012, 12, 5, 18, 0, 0, 0); 
var date_utc = new Date(date.getUTCFullYear(), date.getUTCMonth(), date.getUTCDate(),  date.getUTCHours(), date.getUTCMinutes(), date.getUTCSeconds());

The Date function can be used the following ways:

var d = new Date();
var d = new Date(milliseconds);
var d = new Date(dateString);
var d = new Date(year, month, day, hours, minutes, seconds, milliseconds);

This was taken from a related post here: How do you convert a JavaScript date to UTC?

To find out more, please refer to: https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/Date

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