How to get difference between two dates?

Question

How can I get the difference between two dates?

I have:

date1 = 2014/2/20
date2 = 2014/2/16

I want to get the difference value as 4.

Answer 1

Try this to get the difference in terms of number of days

var date1= "2014/2/20";
var date2= "2014/2/16";

var difference = (new Date(date1) - new Date(date2))/(1000*60*60*24);

Js Fiddle Demo

Answer 2

Fiddle Demo

var oneDay = 24 * 60 * 60 * 1000;    
function getDateDiffinDays(d1, d2) {
    var firstDate = new Date(d1);
    var secondDate = new Date(d2);
    return Math.round(Math.abs((firstDate.getTime() - secondDate.getTime()) / (oneDay)));
}

alert(getDateDiffinDays('2014/2/20', '2014/2/16'));

Answer 3

You may simply get the day month and year from the date using js methods as getMonth,year etc. after this you can sinply subtract.