CODEWITHSUNDEEP
javascriptnode.jsdatetimezone
Zauz
Zauz

Reputation: 309

How can I setLocaleHours() on a date object?

When I execute

myDate = new Date('2000-02-02 12:30:00')

I get a date object like this 2000-02-02T11:30:00.000Z because there is a difference of one hour between my timezone (Europe/Vienna) and UTC.

I can now change the hour by doing

myDate.setHours(10)

and the result will be a date object like this 2000-02-02T09:30:00.000Z because of the one hour difference.

I can also set the UTC hours by

myDate.setUTCHours(10)

to get a dateobject like this 2000-02-02T10:30:00.000Z

I'm looking for something similar to

myDate.setLocaleHours(10, "America/New_York")

(which doesn't exist)

What is the best way to set the hours to a specific value in a timezone which is not my current one and also not UTC?

Upvotes: 3

Views: 77

Answers (1)

Matt Johnson-Pint
Matt Johnson-Pint

Reputation: 241525

How can I setLocaleHours() on a date object?

What is the best way to set the hours to a specific value in a timezone which is not my current one and also not UTC?

You can't. At least, not on the Date object. It has no ability to set time based on an arbitrary time zone.

There is work in progress to rectify this, by adding a new set of standard objects to ECMAScript. See the TC39 Temporal proposal for more details. The temporal ZonedInstant will have functionality to work with named time zones.

However, for now, you will need a library that understands time zones. Moment-timezone is one option, though, these days the Moment team recommends Luxon for modern app development. Another great option is js-Joda.

Upvotes: 1

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