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rated 0 times [  93] [ 2]  / answers: 1 / hits: 18017  / 10 Years ago, mon, may 5, 2014, 12:00:00

I have a legacy web app that stores dates as a UNIX timestamp (seconds since the epoch 1970). Usually a timestamp like this represents UTC, however these timestamps are UTC-8. It doesn't look like it ever accounts for Daylight Savings Time (DST). I could convert it on the server to UTC and send to the client, but I would like to know if there is a javascript only solution.



Example Input:



1399335987


Example Output:



2014-05-05T16:26:27-07:00 // Pacific Daylight Time (PDT)


The client should display the date/time according to their local machine. I looked into using momentjs but I could not find how to construct a date from a number without the number being UTC already. Is this possible?


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 Answers
4

Yes, it's possible given the unix timestamps are in UTC, with Moment Timezone (http://momentjs.com/timezone/)





moment

  .unix(1399335987)

  .tz('MST')

  .format('YYYY-MM-DDTHH:mm:ssZ');


And you get



  2014-05-05T17:26:27-07:00


Note here I'm using MST, and you should be able to use whatever timezone you want, via Timezone Data Builder (http://momentjs.com/timezone/data/)



Actually, by default, moment parses and displays in local time.



This means, only if you're in a different timezone (offset really) and still want to get the local time in MST, it's necessary to set the timezone as MST.



Otherwise, moment.unix(1399335987).format('YYYY-MM-DDTHH:mm:ssZ') is good to go.


[#71168] Sunday, May 4, 2014, 10 Years  [reply] [flag answer]
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