Converting a 13 digit Unix timestamp to DateTime with Javascript

Question

I'm trying to convert this 13 digit Unix timestamp (1563398686957) to YYYYMMDD format using Javascript. How can I do this?

I have divided the 1563398686957/1000 and tried to get the first 10 digits but converting from Number to String and back gives me an error and is not there right way to do it if I am looping for many timestamps.

var newCreateDate = 1563398686957 / 1000;
var newTimestamp = Array();
for (let i = 0; i < newCreateDate.length; i++) {
    temp_timestamp = String(newCreateDate[i].slice(0, 9));
    newTimestamp.push(Number(temp_timestamp));
}

Have a look this URL I hope it's helpful toptal.com/software/definitive-guide-to-datetime-manipulation — Sanat Gupta
– Sanat Gupta, Commented Jul 18, 2019 at 10:35
Date constructor may receive exactly 13 digit Unix timestamp as a parameter). — hindmost
– hindmost, Commented Jul 18, 2019 at 10:38

shrys · Accepted Answer · 2019-07-18 10:37:12Z

1

You can pass timestamp into Date:

var unixts = 1563398686957;
var date = new Date(unixts);

var fdate = date.getFullYear() + '/' + ("0" + (date.getMonth() + 1)).slice(-2) + '/' + ("0" + date.getDate()).slice(-2);
console.log(fdate);

edited Jul 18, 2019 at 10:37

answered Jul 18, 2019 at 10:33

shrys

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1 Comment

shrys Over a year ago

@kshetline true

kshetline · Accepted Answer · 2019-07-18 10:41:53Z

1

new Date(1563398686957).toISOString().substr(0, 10)

Will give you the date in this form: 2019-07-17

new Date(1563398686957).toISOString().substr(0, 10).replace(/-/g, '/')

Will change the dashes to slashes, if you prefer, and...

new Date(1563398686957).toISOString().substr(0, 10).replace(/-/g, '')

Would give you 20190717.

answered Jul 18, 2019 at 10:41

kshetline

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1 Comment

shrys Over a year ago

short and great

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