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I have a ISO8601 date that contains a timezone offset (see below). When I create a Date object from this, the date object is converted into my timezone (currently GMT), and timezone offset goes to 0. Is there any way to get the Date() constructor to preserve the timezone offset?

  var date = new Date("2012-01-17T12:55:00.000+01:00");
  console.log(date.toString());

The output I get is:

"Tue Jan 17 2012 11:55:00 GMT+0000 (GMT)"

The output I want is:

"Tue Jan 17 2012 12:55:00"

I have a ISO8601 date that contains a timezone offset (see below). When I create a Date object from this, the date object is converted into my timezone (currently GMT), and timezone offset goes to 0. Is there any way to get the Date() constructor to preserve the timezone offset?

  var date = new Date("2012-01-17T12:55:00.000+01:00");
  console.log(date.toString());

The output I get is:

"Tue Jan 17 2012 11:55:00 GMT+0000 (GMT)"

The output I want is:

"Tue Jan 17 2012 12:55:00"

• javascript
• datetime
• timezone

Share Improve this question Follow asked Jan 16, 2012 at 16:52 KevinKevin 11.7k2222 gold badges8484 silver badges104104 bronze badges 2

• By copying & paste your example in Google Chrome, I get the output you want 'Tue Jan 17 2012 12:55:00 GMT+0100 (Paris, Madrid)', which browser do you use? – Arnaud F. Commented Jan 16, 2012 at 17:17
• @ArnaudF. I strongly suspect that is because your local timezone is GMT +1. Here in Fort Worth, TX in Chrome I get: 'Tue Jan 17 2012 05:55:00 GMT-0600 (Central Standard Time)'. – DMKing Commented Jan 16, 2012 at 17:44

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1 Answer 1

Sorted by: Reset to default 9

Not with the built-in Date object, as they're only aware of Local (as defined by the user's browser and/or OS settings) and UTC. You can see this from the many cloned methods the class has (e.g., getHours / getUTCHours).

getTimezoneOffset is the only timezone info you really have, but it's local as well and will probably only give you +0 again (or +6 in my case):

var date = new Date("2012-01-17T12:55:00.000+01:00");
console.log(date.getTimezoneOffset() / 60.0);

You can try timezone-js (or one of its forks), but you'll need to know the Olson timezone name not just the GMT/UTC offset:

var date = new new timezoneJS.Date('2012-01-17T12:55:00.000+01:00', 'Europe/Brussels');
alert(date.getTimezoneOffset() / 60.0); // +1

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