CODEWITHSUNDEEP
javascriptmomentjs
jcollum
jcollum

Reputation: 46589

How can I get moment.js to output a formatted time in UTC time with milliseconds?

var end, moment, timeFormat;
moment = require('moment');
end = moment.utc('2016-11-29T23:59:59.999');
console.dir(end.format());
timeFormat = 'YYYY-MM-DDThh:mm:ss.SSS';
console.dir(end.format(timeFormat));

Output: 

'2016-11-29T23:59:59Z'
'2016-11-29T11:59:59.999'

What I really need: 

'2016-11-29T23:59:59.999'

Why is there a 12 hour difference between those 2 outputs? I could just add 12 hours to it, but that is hacky. I don't understand why moment is suddenly subtracting 12 hours from my date as soon as I give it a format. Seems unlikely this is a bug; more likely me misunderstanding what Moment is doing.

My timezone is GMT+8.

Upvotes: 1

Views: 533

Answers (3)

VincenzoC
VincenzoC

Reputation: 31482

Because you are using hh (01-12) instead of HH (00-23); see the Moment.js format() docs.

Here is a working example:

var end, wrongTimeFormat, timeFormat;
end = moment.utc('2016-11-29T23:59:59.999');
console.dir(end.format());
wrongTimeFormat = 'YYYY-MM-DDThh:mm:ss.SSS';
timeFormat = 'YYYY-MM-DDTHH:mm:ss.SSS';
console.dir(end.format(wrongTimeFormat));
console.dir(end.format(timeFormat));
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.17.0/moment.min.js"></script>

Upvotes: 3

gyre
gyre

Reputation: 16777

According to the Moment.js docs, lowercase hh will produce hours in the 01-12 range, which are meant to be used in conjunction with am/pm. You need capital HH (00-23, "military time"), as in

timeFormat = 'YYYY-MM-DDTHH:mm:ss.SSS'

Upvotes: 2

yosiweinreb
yosiweinreb

Reputation: 485

use uppercase HH

timeFormat = 'YYYY-MM-DDTHH:mm:ss.SSS';

Upvotes: 1

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