Transform date to wire format (YYYY-MM-DD) in javascript

Question

Having this input: Wed Feb 03 2021 00:00:00 GMT+0200 (Eastern European Standard Time) , is there a way to format it as YYYY-MM-DD, to it will become 2021-02-03 ?

Answer 1

Try this:

 const date = moment(new Date('Wed Feb 03 2021 00:00:00 GMT+0200 (Eastern European Standard Time)')).format('YYYY-MM-DD'); console.log(date);

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Answer 2

Parsing a timestamp to a date to reformat it may well produce incorrect results if the timestamp includes an offset or timezone. Given "Wed Feb 03 2021 00:00:00 GMT+0200 (Eastern European Standard Time)", for a user with an offset of +1 or less the date will be 2 Feb, not 3 Feb.

The most reliable method is to reformat the string, eg

 let timestamp = "Wed Feb 03 2021 00:00:00 GMT+0200 (Eastern European Standard Time)"; let months = [,'Jan','Feb','Mar','Apr','May','Jun', 'Jul','Aug','Sep','Oct','Nov','Dec']; let pad = n=>('0'+n).slice(-2); let p = timestamp.split(' '); console.log(`${p[3]}-${pad(months.indexOf(p[1]))}-${p[2]}`);