[javascript] Get String in YYYYMMDD format from JS date object?

I'm trying to use JS to turn a date object into a string in YYYYMMDD format. Is there an easier way than concatenating Date.getYear(), Date.getMonth(), and Date.getDay()?

You can create yourself function as below

function toString(o, regex) {
    try {
        if (!o) return '';
        if (typeof o.getMonth === 'function' && !!regex) {
            let splitChar = regex.indexOf('/') > -1 ? '/' : regex.indexOf('-') > -1 ? '-' : regex.indexOf('.') > -1 ? '.' : '';
            let dateSeparate = regex.split(splitChar);
            let result = '';
            for (let item of dateSeparate) {
                let val = '';
                switch (item) {
                    case 'd':
                        val = o.getDate();
                        break;
                    case 'dd':
                        val = this.date2Char(o.getDate());
                        break;
                    case 'M':
                        val = o.getMonth() + 1;
                        break;
                    case 'MM':
                        val = this.date2Char(o.getMonth() + 1);
                        break;
                    case 'yyyy':
                        val = o.getFullYear();
                        break;
                    case 'yy':
                        val = this.date2Char(o.getFullYear());
                        break;
                    default:
                        break;
                }
                result += val + splitChar;
            }
            return result.substring(0, result.length - 1);
        } else {
            return o.toString();
        }
    } catch(ex) { return ''; }
}

function concatDateToString(args) {
    if (!args.length) return '';
    let result = '';
    for (let i = 1; i < args.length; i++) {
        result += args[i] + args[0];
    }
    return result.substring(0, result.length - 1);
}

function date2Char(d){
    return this.rightString('0' + d);
}

function rightString(o) {
    return o.substr(o.length - 2);
}

Used:

var a = new Date();
console.log('dd/MM/yyyy: ' + toString(a, 'dd/MM/yyyy'));
console.log('MM/dd/yyyy: ' + toString(a, 'MM/dd/yyyy'));
console.log('dd/MM/yy: ' + toString(a, 'dd/MM/yy'));
console.log('MM/dd/yy: ' + toString(a, 'MM/dd/yy'));

From ES6 onwards you can use template strings to make it a little shorter:

var now = new Date();
var todayString = `${now.getFullYear()}-${now.getMonth()}-${now.getDate()}`;

This solution does not zero pad. Look to the other good answers to see how to do that.

Date.js has a lot of helpful date parsing methods.

require("datejs")

(new Date()).toString("yyyyMMdd")

Nice, and easy:

    var date = new Date();
    var yyyy = date.getFullYear();
    var mm = date.getMonth() + 1; // getMonth() is zero-based
    if (mm < 10) mm='0'+mm;
    var dd = date.getDate();
    if (dd < 10) dd='0'+dd;
    /*date.yyyymmdd();*/

    console.log('test - '+yyyy+'-'+mm+'-'+dd);

Little bit simplified version for the most popular answer in this thread https://stackoverflow.com/a/3067896/5437379 :

function toYYYYMMDD(d) {
    var yyyy = d.getFullYear().toString();
    var mm = (d.getMonth() + 101).toString().slice(-2);
    var dd = (d.getDate() + 100).toString().slice(-2);
    return yyyy + mm + dd;
}

new Date('Jun 5 2016').
  toLocaleString('en-us', {year: 'numeric', month: '2-digit', day: '2-digit'}).
  replace(/(\d+)\/(\d+)\/(\d+)/, '$3-$1-$2');

// => '2016-06-05'

var dateDisplay = new Date( 2016-11-09 05:27:00 UTC );
dateDisplay = dateDisplay.toString()
var arr = (dateDisplay.split(' '))
var date_String =  arr[0]+','+arr[1]+' '+arr[2]+' '+arr[3]+','+arr[4]

this will show string like Wed,Nov 09 2016,10:57:00

If using AngularJs (up to 1.5) you can use the date filter:

var formattedDate = $filter('date')(myDate, 'yyyyMMdd')

To get the local date, in a YYYYMMDD format, im using:

var todayDate = (new Date()).toLocaleString('en-GB').slice(0,10).split("\/").reverse().join("");

Native Javascript:

new Date().toLocaleString('zu-ZA').slice(0,10).replace(/-/g,'');

this post helped me to write this helper, so I share it in case some one is looking for this solution, it supports all variations of yyyy, mm, dd

Date.prototype.formattedDate = function (pattern) {
    formattedDate = pattern.replace('yyyy', this.getFullYear().toString());
    var mm = (this.getMonth() + 1).toString(); // getMonth() is zero-based
    mm = mm.length > 1 ? mm : '0' + mm;
    formattedDate = formattedDate.replace('mm', mm);
    var dd = this.getDate().toString();
    dd = dd.length > 1 ? dd : '0' + dd;
    formattedDate = formattedDate.replace('dd', dd);
    return formattedDate;
};

d = new Date();
pattern = 'yyyymmdd';  // 20150813
d.formattedDate(pattern);

pattern = 'yyyy-mm-dd';
d.formattedDate(pattern); // 2015-08-13

Here's a compact little function that's easy to read and avoids local variables, which can be time-sinks in JavaScript. I don't use prototypes to alter standard modules, because it pollutes the namespace and can lead to code that doesn't do what you think it should.

The main function has a stupid name, but it gets the idea across.

function dateToYYYYMMDDhhmmss(date) {
    function pad(num) {
        num = num + '';
        return num.length < 2 ? '0' + num : num;
    }
    return date.getFullYear() + '/' +
        pad(date.getMonth() + 1) + '/' +
        pad(date.getDate()) + ' ' +
        pad(date.getHours()) + ':' +
        pad(date.getMinutes()) + ':' +
        pad(date.getSeconds());
}

<pre>Date.prototype.getFromFormat = function(format) {
    var yyyy = this.getFullYear().toString();
    format = format.replace(/yyyy/g, yyyy)
    var mm = (this.getMonth()+1).toString(); 
    format = format.replace(/mm/g, (mm[1]?mm:"0"+mm[0]));
    var dd  = this.getDate().toString();
    format = format.replace(/dd/g, (dd[1]?dd:"0"+dd[0]));
    var hh = this.getHours().toString();
    format = format.replace(/hh/g, (hh[1]?hh:"0"+hh[0]));
    var ii = this.getMinutes().toString();
    format = format.replace(/ii/g, (ii[1]?ii:"0"+ii[0]));
    var ss  = this.getSeconds().toString();
    format = format.replace(/ss/g, (ss[1]?ss:"0"+ss[0]));
    var ampm = (hh >= 12) ? "PM" : "AM";
    format = format.replace(/ampm/g, (ampm[1]?ampm:"0"+ampm[0]));
    return format;
};
var time_var = $('#899_TIME');
var myVar = setInterval(myTimer, 1000);
function myTimer() {
    var d = new Date(); 
    var date = d.getFromFormat('dd-mm-yyyy hh:ii:ss:ampm');
    time_var.text(date);

} </pre>

use the code and get the output like **26-07-2017 12:29:34:PM**

check the below link for your reference

https://parthiban037.wordpress.com/2017/07/26/date-and-time-format-in-oracle-apex-using-javascript/ 

date-shortcode to the rescue!

const dateShortcode = require('date-shortcode')
dateShortcode.parse('{YYYYMMDD}', new Date())
//=> '20180304'

[day,,month,,year]= Intl.DateTimeFormat(undefined, { year: 'numeric', month: '2-digit', day: '2-digit' }).formatToParts(new Date()),year.value+month.value+day.value

or

new Date().toJSON().slice(0,10).replace(/\/|-/g,'')

dateformat is a very used package.

How to use:

Download and install dateformat from NPM. Require it in your module:

const dateFormat = require('dateformat');

and then just format your stuff:

const myYYYYmmddDate = dateformat(new Date(), 'yyyy-mm-dd');

In addition to o-o's answer I'd like to recommend separating logic operations from the return and put them as ternaries in the variables instead.

Also, use concat() to ensure safe concatenation of variables

Date.prototype.yyyymmdd = function() {_x000D_
  var yyyy = this.getFullYear();_x000D_
  var mm = this.getMonth() < 9 ? "0" + (this.getMonth() + 1) : (this.getMonth() + 1); // getMonth() is zero-based_x000D_
  var dd = this.getDate() < 10 ? "0" + this.getDate() : this.getDate();_x000D_
  return "".concat(yyyy).concat(mm).concat(dd);_x000D_
};_x000D_
_x000D_
Date.prototype.yyyymmddhhmm = function() {_x000D_
  var yyyymmdd = this.yyyymmdd();_x000D_
  var hh = this.getHours() < 10 ? "0" + this.getHours() : this.getHours();_x000D_
  var min = this.getMinutes() < 10 ? "0" + this.getMinutes() : this.getMinutes();_x000D_
  return "".concat(yyyymmdd).concat(hh).concat(min);_x000D_
};_x000D_
_x000D_
Date.prototype.yyyymmddhhmmss = function() {_x000D_
  var yyyymmddhhmm = this.yyyymmddhhmm();_x000D_
  var ss = this.getSeconds() < 10 ? "0" + this.getSeconds() : this.getSeconds();_x000D_
  return "".concat(yyyymmddhhmm).concat(ss);_x000D_
};_x000D_
_x000D_
var d = new Date();_x000D_
document.getElementById("a").innerHTML = d.yyyymmdd();_x000D_
document.getElementById("b").innerHTML = d.yyyymmddhhmm();_x000D_
document.getElementById("c").innerHTML = d.yyyymmddhhmmss();

<div>_x000D_
  yyyymmdd: <span id="a"></span>_x000D_
</div>_x000D_
<div>_x000D_
  yyyymmddhhmm: <span id="b"></span>_x000D_
</div>_x000D_
<div>_x000D_
  yyyymmddhhmmss: <span id="c"></span>_x000D_
</div>

If you don't need a pure JS solution, you can use jQuery UI to do the job like this :

$.datepicker.formatDate('yymmdd', new Date());

I usually don't like to import too much libraries. But jQuery UI is so useful, you will probably use it somewhere else in your project.

Visit http://api.jqueryui.com/datepicker/ for more examples

Local time:

var date = new Date();
date = date.toJSON().slice(0, 10);

UTC time:

var date = new Date().toISOString();
date = date.substring(0, 10);

date will print 2020-06-15 today as i write this.

toISOString() method returns the date with the ISO standard which is YYYY-MM-DDTHH:mm:ss.sssZ

The code takes the first 10 characters that we need for a YYYY-MM-DD format.

If you want format without '-' use:

var date = new Date();
date = date.toJSON().slice(0, 10).split`-`.join``;

In .join`` you can add space, dots or whatever you'd like.

This code is fix to Pierre Guilbert's answer:

(it works even after 10000 years)

YYYYMMDD=new Date().toISOString().slice(0,new Date().toISOString().indexOf("T")).replace(/-/g,"")

This is a single line of code that you can use to create a YYYY-MM-DD string of today's date.

var d = new Date().toISOString().slice(0,10);

This guy here => http://blog.stevenlevithan.com/archives/date-time-format wrote a format() function for the Javascript's Date object, so it can be used with familiar literal formats.

If you need full featured Date formatting in your app's Javascript, use it. Otherwise if what you want to do is a one off, then concatenating getYear(), getMonth(), getDay() is probably easiest.

Shortest

.toJSON().slice(0,10).split`-`.join``;

let d = new Date();

let s = d.toJSON().slice(0,10).split`-`.join``;

console.log(s);

Here is a little improvement to the answer from https://stackoverflow.com/users/318563/o-o

Date.prototype.ddmmyyyy = function(delimiter) {
    var yyyy = this.getFullYear().toString();
    var mm = (this.getMonth()+1).toString(); // getMonth() is zero-based
    var dd  = this.getDate().toString();
    return (dd[1]?dd:"0"+dd[0]) + delimiter + (mm[1]?mm:"0"+mm[0]) + delimiter +yyyy  ; // padding
};

Hope to be helpfull for anyone!

:)

Try this:

function showdate(){

var a = new Date();
var b = a.getFullYear();
var c = a.getMonth();
(++c < 10)? c = "0" + c : c;
var d = a.getDate();
(d < 10)? d = "0" + d : d;
var final = b + "-" + c + "-" + d; 

return final;


} 

document.getElementById("todays_date").innerHTML = showdate();

You can simply use This one line code to get date in year

var date = new Date().getFullYear() + "-" + (parseInt(new Date().getMonth()) + 1) + "-" + new Date().getDate();

I didn't like adding to the prototype. An alternative would be:

var rightNow = new Date();_x000D_
var res = rightNow.toISOString().slice(0,10).replace(/-/g,"");_x000D_
_x000D_
<!-- Next line is for code snippet output only -->_x000D_
document.body.innerHTML += res;

I hope this function will be useful

function formatDate(dDate,sMode){       
        var today = dDate;
        var dd = today.getDate();
        var mm = today.getMonth()+1; //January is 0!
        var yyyy = today.getFullYear();
        if(dd<10) {
            dd = '0'+dd
        } 
        if(mm<10) {
            mm = '0'+mm
        } 
        if (sMode+""==""){
            sMode = "dd/mm/yyyy";
        }
        if (sMode == "yyyy-mm-dd"){
            return  yyyy + "-" + mm + "-" + dd + "";
        }
        if (sMode == "dd/mm/yyyy"){
            return  dd + "/" + mm + "/" + yyyy;
        }

    }

I don't like modifying native objects, and I think multiplication is clearer than the string padding the accepted solution.

function yyyymmdd(dateIn) {_x000D_
  var yyyy = dateIn.getFullYear();_x000D_
  var mm = dateIn.getMonth() + 1; // getMonth() is zero-based_x000D_
  var dd = dateIn.getDate();_x000D_
  return String(10000 * yyyy + 100 * mm + dd); // Leading zeros for mm and dd_x000D_
}_x000D_
_x000D_
var today = new Date();_x000D_
console.log(yyyymmdd(today));

Fiddle: http://jsfiddle.net/gbdarren/Ew7Y4/

You can use the toISOString function :

var today = new Date();
today.toISOString().substring(0, 10);

It will give you a "yyyy-mm-dd" format.

Here is a more generic approach which allows both date and time components and is identically sortable as either number or string.

Based on the number order of Date ISO format, convert to a local timezone and remove non-digits. i.e.:

// monkey patch version
Date.prototype.IsoNum = function (n) {
    var tzoffset = this.getTimezoneOffset() * 60000; //offset in milliseconds
    var localISOTime = (new Date(this - tzoffset)).toISOString().slice(0,-1);
    return localISOTime.replace(/[-T:\.Z]/g, '').substring(0,n || 20); // YYYYMMDD
}

Usage

var d = new Date();
// Tue Jul 28 2015 15:02:53 GMT+0200 (W. Europe Daylight Time)
console.log(d.IsoNum(8));  // "20150728"
console.log(d.IsoNum(12)); // "201507281502"
console.log(d.IsoNum());   // "20150728150253272"

Another way is to use toLocaleDateString with a locale that has a big-endian date format standard, such as Sweden, Lithuania, Hungary, South Korea, ...:

date.toLocaleDateString('se')

To remove the delimiters (-) is just a matter of replacing the non-digits:

console.log( new Date().toLocaleDateString('se').replace(/\D/g, '') );

This does not have the potential error you can get with UTC date formats: the UTC date may be one day off compared to the date in the local time zone.

How about Day.js?

It's only 2KB, and you can also dayjs().format('YYYY-MM-DD').

https://github.com/iamkun/dayjs

Sure, you can build a specific function for each variation of date string representations. If you consider international date formats you wind up with dozens of specific functions with rediculous names and hard to distinguish.

There is no reasonable function that matches all formats, but there is a reasonable function composition that does:

const pipe2 = f => g => x =>_x000D_
  g(f(x));_x000D_
_x000D_
const pipe3 = f => g => h => x =>_x000D_
  h(g(f(x)));_x000D_
_x000D_
const invoke = (method, ...args) => o =>_x000D_
  o[method] (...args);_x000D_
_x000D_
const padl = (c, n) => s =>_x000D_
  c.repeat(n)_x000D_
    .concat(s)_x000D_
    .slice(-n);_x000D_
_x000D_
const inc = n => n + 1;_x000D_
_x000D_
// generic format date function_x000D_
_x000D_
const formatDate = stor => (...args) => date =>_x000D_
  args.map(f => f(date))_x000D_
    .join(stor);_x000D_
_x000D_
// MAIN_x000D_
_x000D_
const toYYYYMMDD = formatDate("") (_x000D_
  invoke("getFullYear"),_x000D_
  pipe3(invoke("getMonth")) (inc) (padl("0", 2)),_x000D_
  pipe2(invoke("getDate")) (padl("0", 2)));_x000D_
_x000D_
console.log(toYYYYMMDD(new Date()));

Yes, this is a lot of code. But you can express literally every string date representation by simply changing the function arguments passed to the higher order function formatDate. Everything is explicit and declarative i.e., you can almost read what's happening.

I usually use the code below when I need to do this.

var date = new Date($.now());
var dateString = (date.getFullYear() + '-'
    + ('0' + (date.getMonth() + 1)).slice(-2)
    + '-' + ('0' + (date.getDate())).slice(-2));
console.log(dateString); //Will print "2015-09-18" when this comment was written

To explain, .slice(-2) gives us the last two characters of the string.

So no matter what, we can add "0" to the day or month, and just ask for the last two since those are always the two we want.

So if the MyDate.getMonth() returns 9, it will be:

("0" + "9") // Giving us "09"

so adding .slice(-2) on that gives us the last two characters which is:

("0" + "9").slice(-2)

"09"

But if date.getMonth() returns 10, it will be:

("0" + "10") // Giving us "010"

so adding .slice(-2) gives us the last two characters, or:

("0" + "10").slice(-2)

"10"

Working from @o-o's answer this will give you back the string of the date according to a format string. You can easily add a 2 digit year regex for the year & milliseconds and the such if you need them.

Date.prototype.getFromFormat = function(format) {
    var yyyy = this.getFullYear().toString();
    format = format.replace(/yyyy/g, yyyy)
    var mm = (this.getMonth()+1).toString(); 
    format = format.replace(/mm/g, (mm[1]?mm:"0"+mm[0]));
    var dd  = this.getDate().toString();
    format = format.replace(/dd/g, (dd[1]?dd:"0"+dd[0]));
    var hh = this.getHours().toString();
    format = format.replace(/hh/g, (hh[1]?hh:"0"+hh[0]));
    var ii = this.getMinutes().toString();
    format = format.replace(/ii/g, (ii[1]?ii:"0"+ii[0]));
    var ss  = this.getSeconds().toString();
    format = format.replace(/ss/g, (ss[1]?ss:"0"+ss[0]));
    return format;
};

d = new Date();
var date = d.getFromFormat('yyyy-mm-dd hh:ii:ss');
alert(date);

I don't know how efficient that is however, especially perf wise because it uses a lot of regex. It could probably use some work I do not master pure js.

Use padStart:

Date.prototype.yyyymmdd = function() {
    return [
        this.getFullYear(),
        (this.getMonth()+1).toString().padStart(2, '0'), // getMonth() is zero-based
        this.getDate().toString().padStart(2, '0')
    ].join('-');
};

Answering another for Simplicity & readability.
Also, editing existing predefined class members with new methods is not encouraged:

function getDateInYYYYMMDD() {
    let currentDate = new Date();

    // year
    let yyyy = '' + currentDate.getFullYear();

    // month
    let mm = ('0' + (currentDate.getMonth() + 1));  // prepend 0 // +1 is because Jan is 0
    mm = mm.substr(mm.length - 2);                  // take last 2 chars

    // day
    let dd = ('0' + currentDate.getDate());         // prepend 0
    dd = dd.substr(dd.length - 2);                  // take last 2 chars

    return yyyy + "" + mm + "" + dd;
}

var currentDateYYYYMMDD = getDateInYYYYMMDD();
console.log('currentDateYYYYMMDD: ' + currentDateYYYYMMDD);

If you don't mind including an additional (but small) library, Sugar.js provides lots of nice functionality for working with dates in JavaScript. To format a date, use the format function:

new Date().format("{yyyy}{MM}{dd}")

Moment.js could be your friend

var date = new Date();
var formattedDate = moment(date).format('YYYYMMDD');

Plain JS (ES5) solution without any possible date jump issues caused by Date.toISOString() printing in UTC:

var now = new Date();
var todayUTC = new Date(Date.UTC(now.getFullYear(), now.getMonth(), now.getDate()));
return todayUTC.toISOString().slice(0, 10).replace(/-/g, '');

This in response to @weberste's comment on @Pierre Guilbert's answer.

I try to write a simple library for manipulating JavaScript date object. You can try this.

var dateString = timeSolver.getString(date, "YYYYMMDD")

Libarary here: https://github.com/sean1093/timeSolver

It seems that mootools provides Date().format(): https://mootools.net/more/docs/1.6.0/Types/Date

I'm not sure if it worth including just for this particular task though.

The @o-o solution doesn't work in my case. My solution is the following:

Date.prototype.yyyymmdd = function() {
  var mm = this.getMonth() + 1; // getMonth() is zero-based
  var dd = this.getDate();
  var ret = [this.getFullYear(), (mm<10)?'0':'', mm, (dd<10)?'0':'', dd].join('');

  return ret; // padding
};