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From: Jake Jarvis <pig_in_shoes@yahoo.com>
Newsgroups: comp.lang.javascript
Subject: Re: setDate()
Date: Thu, 15 Dec 2011 01:09:28 +0100
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On 15.12.2011 01:00, Gene Wirchenko wrote:
> Dear JavaScripters:
>
>       I have just about finished my date class.  One of the last
> consequential functions is to add/subtract days from a date.
>
>       In IE9, with Date, one can do
>            SomeDate.setDate(SomeDate.getDate()+n);
> and if there is overflow in the days of the month, the date will be
> normalised.  e.g. 2011-12-31 + 32 = 2012-02-01.
>
>       Is this behaviour that I can count on?  It seems to fail at 366
> days.
<snip>

What do you mean with "fail at 366 days"?

-- 
Jake Jarvis