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calculate the difference between dates

Posted on 2006-07-18
Last Modified: 2008-03-17
I need to calculate the difference between dates, as to get the number of months between them.

Please advice.
Question by:sahnias
  • 2
  • 2
LVL 19

Expert Comment

ID: 17131621
Hi sahnias,
Try the following function

  <script type="text/javascript">
    function daysDiff(x,y) {
      return((x - y)/(1000*60*60*24));
   var sDate = new Date('01/01/2005')
   var eDate = new Date('01/01/2006')

Hope this helps,

Author Comment

ID: 17131660
this will give me days difference... and i have that code already... however how do i get the months difference.
LVL 19

Accepted Solution

nschafer earned 50 total points
ID: 17131749
Sorry about that.  I guess I need to learn to read better.  

This should work for you.

    function monthsDiff(x,y) {
      var smonth = y.getMonth();
      var emonth = x.getMonth();
      var syear = y.getFullYear();
      var eyear = x.getFullYear();
      var months = (eyear - syear) * 12 + emonth - smonth
      if (y.getDate() > x.getDate()) months -=1;
      return months;
   var sDate = new Date('03/15/2005')
   var eDate = new Date('01/01/2006')

LVL 28

Expert Comment

by:Pravin Asar
ID: 17137432
NO POINTS Please. As I am posting a link to my post.

LVL 28

Expert Comment

by:Pravin Asar
ID: 17137444
function CalculateDiff(d1, d2) {
var date1 = new Date (d1);
var date2 = new Date (d2);
var diff ;
if (date1 > date2) {
diff = date1 - date2;
else {
diff = date2 - date1;
diff = new Date (diff);

// Difference in months

alert ('Difference in Months : ' + diff.getMonth()+1);

CalculateDiff ('01/05/2006', '07/19/2006');

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