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127

How to validate date with Moment.js to a specified format?

rated 0 times [ 130] [ 3] / answers: 1 / hits: 17510 / 7 Years ago, fri, october 6, 2017, 12:00:00

I am unable to find an existing question/answer on how to validate a date input using moment.js to ensure that it is in this format, 2017-12-31T23:59:59Z.

Given that I've got a date as a string, 2017-12-31T23:59:59Z, how can validate that the date string is strictly in the format specified, YYYY-MM-DDThh:mm:ssZ.

I've tried the following and it does not seem to work for me.

var dateTime = 2017-12-31T23:59:59Z;

var utc = moment(dateTime, YYYY-MM-DDThh:mm:ssZ, true)

var isUTC = utc.isValid(dateTime);



console.log(isUTC);

<script src=https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.18.1/moment.min.js></script>

Could anyone please provide a couple of examples?

Thanks in advance
-R

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wyattkennyc

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2 Years ago

answered 7 Years ago deiong · Accepted Answer

Moment tokens are case sensitive, you should use uppercase HH to parse 0-23 hours, hh is for parsing 1-12. See moment(String, String, Boolean) docs.

Here a live example:

var dateTime = 2017-12-31T23:59:59Z;

var utc = moment(dateTime, YYYY-MM-DDThh:mm:ssZ, true)

var isUTC = utc.isValid();

console.log(isUTC);



utc = moment(dateTime, YYYY-MM-DDTHH:mm:ssZ, true)

isUTC = utc.isValid();

console.log(isUTC);

<script src=https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.18.1/moment.min.js></script>