From owner-freebsd-questions  Mon Oct 27 08:29:49 1997
Return-Path: <owner-freebsd-questions>
Received: (from root@localhost)
          by hub.freebsd.org (8.8.7/8.8.7) id IAA00250
          for questions-outgoing; Mon, 27 Oct 1997 08:29:49 -0800 (PST)
          (envelope-from owner-freebsd-questions)
Received: (from jmb@localhost)
          by hub.freebsd.org (8.8.7/8.8.7) id IAA00243;
          Mon, 27 Oct 1997 08:29:39 -0800 (PST)
          (envelope-from jmb)
From: "Jonathan M. Bresler" <jmb>
Message-Id: <199710271629.IAA00243@hub.freebsd.org>
Subject: Re: 2000 Compliance / dates / time libs
To: steve@visint.co.uk (Stephen Roome)
Date: Mon, 27 Oct 1997 08:29:38 -0800 (PST)
Cc: freebsd-questions@freebsd.org
In-Reply-To: <Pine.BSF.3.95.1000229000941.14077A-100000@dylan.visint.co.uk> from "Stephen Roome" at Feb 29, 0 00:13:57 am
X-Mailer: ELM [version 2.4 PL24]
Content-Type: text
Sender: owner-freebsd-questions@freebsd.org
X-Loop: FreeBSD.org
Precedence: bulk

Stephen Roome wrote:
> 
> 
> I just set my clock to february 29 2000. Is this valid ?

	the algorithm, as i understand it is:

	if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0))
		it is a leap year.

	this is only good back till the switch from julian to gregorian
	calendars.
jmb