Calculate month with days in javascript

Question

I want to calculate month with days in javascript.

I have requirement like My date range will be within 24 months.

I have todate comes from somewhere that is 24 Sep 2012

Now,

if I enter 31 Aug 2010 in from date and 24 Sep 2012 in todate, it shows an error message.

Currently I am doing like that

todate.getMonth() - fromdate.getMonth() + (12 * (todate.getFullYear() - fromdate.getFullYear()))

but, if I enter 23 Sep 2010 in from date and 24 Sep 2012, it should also show error message..

but, its allowing me that date..which is 24 month beyond date..so, how can I calculate month with date which does not allow my above given date.

Thanks

Can you please not use numbers instead of words like to? It is VERY confusing. _as I have 2 show 2 years/24 months data_ means what? — mplungjan, Sep 13 '13 at 08:35
@mplungjan..hey, thanks for your suggestions... I have requirement like My date range will be within 24 months — Rishabh Shah, Sep 13 '13 at 08:39
possible duplicate of [Difference in Months between two dates in JavaScript](http://stackoverflow.com/questions/2536379/difference-in-months-between-two-dates-in-javascript) — mplungjan, Sep 13 '13 at 08:43

score 1 · Accepted Answer · answered Sep 13 '13 at 08:44

Your problem is that when it's the same month two years apart, you need to also check the day of the month.

function isValidDate (from, to) {
  var months = to.getMonth() - from.getMonth() + 
              (12 * (to.getFullYear() - from.getFullYear()));
  return months < 24 || months === 24 && to.getDate() < from.getDate();
}

internals-in · Answer 2 · 2013-09-13T13:37:12.817

1

Try this to get Days

function finddays(date_from, date_to) 
{return Math.round(Math.abs(new Date(date_from).getTime() - new Date(date_to).getTime())/(1000 * 60 * 60 * 24))}

use:

finddays("23 Sep 2010", "25 Sep 2010");

Update

Not Recommending but works better
Try this to get months (hopes a month of 30 days , Error prone +-3/yr)

 function findMonths(date_from, date_to) 
    {return Math.round((new Date(date_to).getTime()-new Date(date_from).getTime())/(1000 * 60 * 60 * 24*30))}

use:

findMonths("23 Sep 2010", "25 Oct 2010");

edited Sep 13 '13 at 13:37

answered Sep 13 '13 at 08:51

internals-in

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But he is looking for findmonths, not finddays – mplungjan Sep 13 '13 at 12:05

Calculate month with days in javascript

2 Answers2