Convert normal date to unix timestamp

Question

How can I convert normal date 2012.08.10 to unix timestamp in javascript?

Fiddle: http://jsfiddle.net/J2pWj/

I've seen many posts here that convert it in PHP, Ruby, etc... But I need to do this inside JS.

possible duplicate of [convert date to timestamp in javascript?](http://stackoverflow.com/questions/9873197/convert-date-to-timestamp-in-javascript) — Martin York, Aug 09 '12 at 22:49
Maybe I'm missing something but `unix timestamp` is so fundamental to all the engineering and computer science. Wish there was built-in convenience method. Currently I'm using `Math.floor((+new Date()) / 1000);` — Mars Robertson, May 07 '19 at 07:56
This worked fine: https://stackoverflow.com/a/72047159/8119511 — Ank_247shbm, Apr 28 '22 at 16:23

score 393 · Accepted Answer · edited Jan 20 '22 at 05:54

393

Math.floor(new Date('2012.08.10').getTime() / 1000)

Check the JavaScript Date documentation.

edited Jan 20 '22 at 05:54

Yangshun Tay

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answered Aug 09 '12 at 22:53

fguillen

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Math.floor it or its not a unix timestamp (it'll have a decimal) – B T Jun 17 '14 at 21:11
@fguillen,Mooseman, I run and check this code. Once I convert unix timestamp to date it is giving me 2012.08.09 instead of 2012.08.10. Why is that..? – WP Learner Dec 17 '15 at 09:00
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@user2584538, see my answer below. You must remove the decimals. – theVinchi Feb 15 '16 at 17:46
Why does Date.parse give incorrect results?: http://stackoverflow.com/a/2587398/2714931 – WeizhongTu Oct 31 '16 at 10:15
Did something change since this answer? `.getTime()` returns UNIX timestamps at the time of writing this... – Mentor Apr 08 '19 at 09:12
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@Mentor UNIX time is measured in seconds, not milliseconds – Nicu Surdu Jul 22 '19 at 14:43
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why did you divide the result to 1000? because `getTime` will give you in ms – Shahin Ghasemi Mar 14 '20 at 10:22

theVinchi · Answer 2 · 2016-10-20T16:28:30.113

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parseInt((new Date('2012.08.10').getTime() / 1000).toFixed(0))

It's important to add the toFixed(0) to remove any decimals when dividing by 1000 to convert from milliseconds to seconds.

The .getTime() function returns the timestamp in milliseconds, but true unix timestamps are always in seconds.

edited Oct 20 '16 at 16:28

answered Feb 23 '15 at 21:23

theVinchi

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just beware that this return a string, not a number. – Capaj Aug 24 '16 at 14:25
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Good point, changed answer to wrap with parseInt() to convert back to integer. – theVinchi Oct 20 '16 at 16:29
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If performance matters, probably the better and more correct option is `Math.round` or `Math.floor`, rather than converting to a string and then back to an integer - that is: `Math.round(new Date('2012.08.10').getTime() / 1000)` – mindplay.dk Jun 15 '21 at 10:32
I haven't tested this out but just putting my two cents in here that I'm thinking this would be very slow compared to the current top method of `Math.floor(new Date('2012.08.10').getTime() / 1000)`. Reason is because this code plays with strings which in my mind would be more performance costly than just dealing with numbers. – jaquinocode Apr 21 '22 at 17:13

score 40 · Answer 3 · answered Jun 19 '17 at 15:19

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var d = '2016-01-01T00:00:00.000Z';
console.log(new Date(d).valueOf()); // returns the number of milliseconds since the epoch

answered Jun 19 '17 at 15:19

KARTHIKEYAN.A

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The only reason this isn't the accepted answer is because it returns the number of *milliseconds* where as the question is about unix timestamps, which are measured in *seconds*. So, you'll still have to do all of the division and Math.floor() that other answers suggest. – Tyler V. May 12 '22 at 22:34

score 15 · Answer 4 · answered Feb 10 '16 at 01:12

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You should check out the moment.js api, it is very easy to use and has lots of built in features.

I think for your problem, you could use something like this:

var unixTimestamp = moment('2012.08.10', 'YYYY.MM.DD').unix();

answered Feb 10 '16 at 01:12

Mahus

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score 12 · Answer 5 · answered Jul 04 '18 at 18:33

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You can do it using Date.parse() Method.

Date.parse($("#yourCustomDate).val())

Date.parse("03.03.2016") output-> 1456959600000

Date.parse("2015-12-12") output-> 1449878400000

answered Jul 04 '18 at 18:33

Nazar

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dumitru · Answer 6 · 2018-07-20T13:02:20.133

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var date = new Date('2012.08.10');
var unixTimeStamp = Math.floor(date.getTime() / 1000);

In this case it's important to return only a whole number (so a simple division won't do), and also to only return actually elapsed seconds (that's why this code uses Math.floor() and not Math.round()).

edited Jul 20 '18 at 13:02

answered Jul 20 '18 at 12:46

dumitru

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score 7 · Answer 7 · edited Jan 09 '18 at 06:56

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You can use Date.parse(), but the input formats that it accepts are implementation-dependent. However, if you can convert the date to ISO format (YYYY-MM-DD), most implementations should understand it.

See Why does Date.parse give incorrect results?.

edited Jan 09 '18 at 06:56

KARTHIKEYAN.A

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answered Aug 09 '12 at 22:50

Barmar

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score 6 · Answer 8 · answered Sep 04 '15 at 00:49

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You could simply use the unary + operator

(+new Date('2012.08.10')/1000).toFixed(0);

http://xkr.us/articles/javascript/unary-add/ - look under Dates.

answered Sep 04 '15 at 00:49

hybrid9

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Just want to add two comments here: the unary add + operator is not needed, as `/` is already a math operator. Also, `toFixed` returns a string and not a number, in case the type is important.. – Laurens Jun 06 '19 at 13:33

score 1 · Answer 9 · answered Aug 09 '12 at 22:56

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var datestr = '2012.08.10';
var timestamp = (new Date(datestr.split(".").join("-")).getTime())/1000;

answered Aug 09 '12 at 22:56

OptimusCrime

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Damodar Bashyal · Answer 10 · 2017-09-26T01:55:05.757

After comparing timestamp with the one from PHP, none of the above seems correct for my timezone. The code below gave me same result as PHP which is most important for the project I am doing.

function getTimeStamp(input) {
    var parts = input.trim().split(' ');
    var date = parts[0].split('-');
 var time = (parts[1] ? parts[1] : '00:00:00').split(':');

 // NOTE:: Month: 0 = January - 11 = December.
 var d = new Date(date[0],date[1]-1,date[2],time[0],time[1],time[2]);
 return d.getTime() / 1000;
}

// USAGE::
var start = getTimeStamp('2017-08-10');
var end = getTimeStamp('2017-08-10 23:59:59');

console.log(start + ' - ' + end);

I am using this on NodeJS, and we have timezone 'Australia/Sydney'. So, I had to add this on .env file:

TZ = 'Australia/Sydney'

Above is equivalent to:

process.env.TZ = 'Australia/Sydney'

score 1 · Answer 11 · answered Apr 01 '20 at 14:39

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convert timestamp to unix timestamp.

const date = 1513787412; const unixDate = new Date(date * 1000);// Dec 20 2020 (object)

to get the timeStamp after conversion const TimeStamp = new Date(date*1000).getTime(); //1513787412000

answered Apr 01 '20 at 14:39

Rajat

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score 1 · Answer 12 · answered Mar 06 '22 at 17:09

1

Using dayjs library:

dayjs('2019-01-25').unix() // 1548381600

answered Mar 06 '22 at 17:09

Sampath

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score 0 · Answer 13 · answered Aug 05 '23 at 09:11

0

You can use :

Math.round((new Date('specific date')).getTime() / 1000)  //it will return current timestamp in seconds

answered Aug 05 '23 at 09:11

vishal sharma

142
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Convert normal date to unix timestamp

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