From: William James <w_a_x_man@...>
Date: 2008-02-29T07:20:03+09:00
Subject: Re: Getting number of days in a month

On Feb 27, 10:17 am, Shandy Nantz <shandyb...@yahoo.com> wrote:
> This is probably an easy question but I am trying to get at the number
> of days that are in a month. I have this calendar that I have built, the
> idea being that when a month turns from February to March, for example,
> the calendar should redisplay itself properly formated showing the new
> month and the correct number of days. I have it so that it starts
> counting the days on the right day of the week, but I have to know when
> to stop counting. Any ideas, Thanks,
>
> -S
> --
> Posted viahttp://www.ruby-forum.com/.

Awk (not my code):

function days_in_month( y, m )
{
  return m==2 ? 28+!(y%4)-!(y%100)+!(y%400) : 30+(m%2 != (m>7))
}