How to create a Date object from IST string in JS

Question

Running the following code in Javascript: var d = Date.UTC("Wed Jan 30 16:27:50 IST 2002");

Results in d being a NaN, same goes for using ICT (Indochina time) instead of IST (Israel Standard Time), although both seem to be valid time zone abbreviations. When I use EST instead, I get a Date object as expected.

Does any workaround exist? I can replace IST with UTC+2, but I don't want to manually match any not supported time zone, especially since I don't know what time zones are supported and which are not...

Community · Accepted Answer · 2021-10-07 06:09:01Z

2

Don't use time zone abbr. See RFC 2822, which Date uses for the string format, https://www.rfc-editor.org/rfc/rfc2822#page-14 It just does not know all but a selected few of those timezone abbreviations and relies on numeric offsets to GMT.

Or, just one example of many pages you can find by asking almighty Google, http://corneliusweiss.de/2008/10/14/dealing-with-time-zones-in-javascript/

edited Oct 7, 2021 at 6:09

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answered Feb 7, 2013 at 8:57

Mörre

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3 Comments

lribinik Over a year ago

Problem is that I get the zone abbr. from another application, have no control over this...

Mörre Over a year ago

You can create your own hash table and convert those strings: timeanddate.com/library/abbreviations/timezones

Matt Johnson-Pint Over a year ago

@Iribinik - Time zone abbreviations are ambiguous. For example, there are 5 different timezones abbreviated by EST. Look at the list on the link Morre provided for more examples. If all you get out of the other application is the abbreviation, then you do not have enough data to determine which timezone it is. You would have to know something else - like what time zones are relevant for your users.

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