[javascript] Convert dd-mm-yyyy string to date

i am trying to convert a string in the format dd-mm-yyyy into a date object in JavaScript using the following:

 var from = $("#datepicker").val();
 var to = $("#datepickertwo").val();
 var f = new Date(from);
 var t = new Date(to);

("#datepicker").val() contains a date in the format dd-mm-yyyy. When I do the following, I get "Invalid Date":

alert(f);

Is this because of the '-' symbol? How can I overcome this?

This question is related to javascript date

The answer is


You can also write a date inside the parentheses of the Date() object, like these:

new Date("Month dd, yyyy hh:mm:ss")
new Date("Month dd, yyyy")
new Date(yyyy,mm,dd,hh,mm,ss)
new Date(yyyy,mm,dd)
new Date(milliseconds)

You could use a Regexp.

var result = /^(\d{2})-(\d{2})-(\d{4})$/.exec($("#datepicker").val());
if (result) {
    from = new Date(
        parseInt(result[3], 10), 
        parseInt(result[2], 10) - 1, 
        parseInt(result[1], 10)
    );
}

regular expression example:

new Date( "13-01-2011".replace( /(\d{2})-(\d{2})-(\d{4})/, "$2/$1/$3") );

var from = $("#datepicker").val(); 
var f = $.datepicker.parseDate("d-m-Y", from);

You can just:

var f = new Date(from.split('-').reverse().join('/'));

The accepted answer kinda has a bug

var from = $("#datepicker").val().split("-")
var f = new Date(from[2], from[1] - 1, from[0])

Consider if the datepicker contains "77-78-7980" which is obviously not a valid date. This would result in:

var f = new Date(7980, 77, 77);
=> Date 7986-08-15T22:00:00.000Z

Which is probably not the desired result.

The reason for this is explained on the MDN site:

Where Date is called as a constructor with more than one argument, if values are greater than their logical range (e.g. 13 is provided as the month value or 70 for the minute value), the adjacent value will be adjusted. E.g. new Date(2013, 13, 1) is equivalent to new Date(2014, 1, 1).


A better way to solve the problem is:

const stringToDate = function(dateString) {
  const [dd, mm, yyyy] = dateString.split("-");
  return new Date(`${yyyy}-${mm}-${dd}`);
};

console.log(stringToDate('04-04-2019'));
// Date 2019-04-04T00:00:00.000Z

console.log(stringToDate('77-78-7980'));
// Invalid Date

This gives you the possibility to handle invalid input.

For example:

const date = stringToDate("77-78-7980");

if (date === "Invalid Date" || isNaN(date)) {
  console.log("It's all gone bad");
} else {
  // Do something with your valid date here
}

new Date().toLocaleDateString();

simple as that, just pass your date to js Date Object


Use this format: myDate = new Date('2011-01-03'); // Mon Jan 03 2011 00:00:00


You can use an external library to help you out.

http://www.mattkruse.com/javascript/date/source.html

getDateFromFormat(val,format);

Also see this: Parse DateTime string in JavaScript


_x000D_
_x000D_
let dateString  = '13-02-2021' //date string in dd-mm-yyyy format

let dateArray = dateString.split("-");
//dateArray[2] equals to 2021
//dateArray[1] equals to 02
//dateArray[0] equals to 13

// using template literals below

let dateObj = new Date(`${dateArray[2]}-${dateArray[1]}-${dateArray[0]}`);

// dateObj equals to Sat Feb 13 2021 05:30:00 GMT+0530 (India Standard Time)

//I'm from India so its showing GMT+0530
_x000D_
_x000D_
_x000D_

P.S : Always refer docs for basics, MDN or DevDocs


Using moment.js example:

var from = '11-04-2017' // OR $("#datepicker").val();
var milliseconds = moment(from, "DD-MM-YYYY").format('x');
var f = new Date(milliseconds)

Take a look at Datejs for all those petty date related issues.. You could solve this by parseDate function too


Another possibility:

var from = "10-11-2011"; 
var numbers = from.match(/\d+/g); 
var date = new Date(numbers[2], numbers[0]-1, numbers[1]);

Match the digits and reorder them


In my case

new Date("20151102034013".replace(/(\d{4})(\d{2})(\d{2})(\d{2})(\d{2})(\d{2})/, "$1-$2-$3T$4:$5:$6"))

Result: Mon Nov 02 2015 04:40:13 GMT+0100 (CET) then I use .getTime() to work with milliseconds