Count Number Of Days Between 2 Dates In Javascript

Please help me get the number of days between today's date and some other date.. Here is my example It gives me NaN Here is what I came up with. My demo var cellvalue='2011-08-18 1

Solution 1:

Use

var firstDate = newDate(); // Todays datevar secondDate = newDate(2011,08,19, 11,49,01);

var diffDays = (firstDate.getDate() - secondDate.getDate());

It was showing NAN as your constructor is wrong. check yourself by alerting secondDate in your original code

Edit : above code will work if both dates are in same month, for general case

var oneDay  = 24*60*60*1000;
var diffDays = Math.abs((firstDate.getTime() - secondDate.getTime()) / oneDay);

Also this will give result as fraction of date, so if you want to count whole dates you can use Math.ceil or Math.floor

Solution 2:

Use this:

var udate="2011-08-19 11:49:01.0 GMT+0530";

The IST part is not valid

Solution 3:

your input date is incorrect that is why it is failing. anyways here is some code that should help you with it.

varDateDiff = {

    inDays: function(d1, d2) {
        var t2 = d2.getTime();
        var t1 = d1.getTime();

        returnparseInt((t2-t1)/(24*3600*1000));
    },

    inWeeks: function(d1, d2) {
        var t2 = d2.getTime();
        var t1 = d1.getTime();

        returnparseInt((t2-t1)/(24*3600*1000*7));
    },

    inMonths: function(d1, d2) {
        var d1Y = d1.getFullYear();
        var d2Y = d2.getFullYear();
        var d1M = d1.getMonth();
        var d2M = d2.getMonth();

        return (d2M+12*d2Y)-(d1M+12*d1Y);
    },

    inYears: function(d1, d2) {
        return d2.getFullYear()-d1.getFullYear();
    }
}
var udate="2011-08-05 11:49:01";
var configDate=newDate(udate);

var oneDay = 24*60*60*1000; // hours*minutes*seconds*millisecondsvar firstDate = newDate(); // Todays datevar secondDate = newDate(udate);

alert(secondDate);

var diffDays = DateDiff .inDays(firstDate,secondDate);

alert(diffDays );

Solution 4:

if you have udate format like 28-07-2011 you can use this

var checkindatestr = "28-07-2011";
var dateParts = checkindatestr.split("-");

var checkindate = newDate(dateParts[2], dateParts[1] - 1, dateParts[0]);
var now = newDate();
var difference = now - checkindate;
var days = difference / (1000*60*60*24);

alert(days);

how to compare two dates in jquery

Solution 5:

You are calculating the difference correctly but the problem is that secondDate is an invalid date. Date cannot work with that date format, it needs "August 08, 2011 11:49:01" as input - and if your date has a different format then you have to convert it. Note that Date has only rudimentary timezone recognition, you can only be sure that "UTC" or "GMT" will be recognized correctly - you shouldn't use other time zones.