From: Gregory Seidman <gsslist+ruby@...>
Date: 2008-07-16T21:32:45+09:00
Subject: Re: Calculate last day of month

On Wed, Jul 16, 2008 at 11:41:32AM +0900, Platoon Tb wrote:
> class Date
>   def self.last_day_of_the_month(yyyy, mm)
>     new(yyyy, mm).next_month - 1
>   end
> end

It's easier than that.

class Date
  def self.last_day_of_the_month(yyyy, mm)
    new(yyyy, mm, -1)
  end
end

--Greg