CODEWITHSUNDEEP
javascriptdatemomentjs
newBike
newBike

Reputation: 15002

moment format method gives 1 day earlier back then local date

For example:

It's Jul 1 12:57AM local computer time.(Pacific) and the moment.js gives me the below result.

How come would I get '06-30'? I think the date is coming nowhere

Everywhere in this world is already on July 1st?

Just wanna know what kind of magic is moment doing?

function method(inputDate) {
    startDate = moment.utc(inputDate, moment.ISO_8601);
    // startDate.format('MM-DD'): 06-30
    // startDate.utc().format('MM-DD'): 07-01
}

inputDate = moment();
method(inputDate);

Upvotes: 1

Views: 554

Answers (1)

Grant Singleton
Grant Singleton

Reputation: 1651

The docs say:

moment.utc(...) is utc mode. Ambiguous input is assumed to be UTC. Unambiguous input is adjusted to UTC.

UTC time is 4 hours later than Pacific time. If your input is considered ambiguous by moment then it is assumed to be UTC and then when it converts to pacific time it is going to go 4 hours previous which would be something like 8:57 PM on 6/30.

Not saying this is definitely what is going on but its a possibility.

Upvotes: 1

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