I'm trying to get the standardized ISO 8601 date format string from Moment.js, but I'm not getting the result I expect.

Moment's toISOString() method is giving me an output with a 17-hour offset, instead of midnight:

var mom = moment("23-11-2016 00:00", "DD-MM-YYYY HH:mm");
alert(mom.toISOString());
// result: 2016-11-22T17:00:00.000Z

Why the result is not 2016-11-23T00:00:00.000Z? How I can get that format?

I'm trying to get the standardized ISO 8601 date format string from Moment.js, but I'm not getting the result I expect.

Moment's toISOString() method is giving me an output with a 17-hour offset, instead of midnight:

var mom = moment("23-11-2016 00:00", "DD-MM-YYYY HH:mm");
alert(mom.toISOString());
// result: 2016-11-22T17:00:00.000Z

Why the result is not 2016-11-23T00:00:00.000Z? How I can get that format?

• javascript
• momentjs
• datetime-format
• iso8601

• 1 Because by default moment parses and displays in local time, while .toISOString() always returns a timestamp in UTC. You probably have -7 hours offset from UTC. Use format() if you want to display date in local time. If your input string represents a UTC time, then use moment.utc(String, String); – VincenzoC Commented Nov 25, 2016 at 11:32

1 Answer 1

As the doc says:

By default, moment parses and displays in local time.

while .toISOString() always returns a timestamp in UTC:

Note that .toISOString() always returns a timestamp in UTC, even if the moment in question is in local mode. This is done to provide consistency with the specification for native JavaScript Date .toISOString(), as outlined in the ES2015 specification.

You probably have -7 hours offset from UTC.

Use format() if you want to display date in local time.

If your input string represents a UTC time, then use moment.utc(String, String);