From owner-freebsd-current@FreeBSD.ORG Wed Jan 4 02:02:44 2006 Return-Path: X-Original-To: current@freebsd.org Delivered-To: freebsd-current@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 6597A16A41F for ; Wed, 4 Jan 2006 02:02:44 +0000 (GMT) (envelope-from richw@richw.org) Received: from smtp2.Stanford.EDU (smtp2.Stanford.EDU [171.67.16.125]) by mx1.FreeBSD.org (Postfix) with ESMTP id C082143D5F for ; Wed, 4 Jan 2006 02:02:43 +0000 (GMT) (envelope-from richw@richw.org) Received: from whodunit.richw.org (SW-90-716-276-1.Stanford.EDU [171.66.155.243]) by smtp2.Stanford.EDU (8.12.11/8.12.11) with ESMTP id k0422fxG024595 for ; Tue, 3 Jan 2006 18:02:41 -0800 Received: from [172.29.0.21] (evilempire.richw.org [172.29.0.21]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: richw) by whodunit.richw.org (Postfix) with ESMTP id 086DD3C9ED; Tue, 3 Jan 2006 18:02:41 -0800 (PST) Date: Tue, 03 Jan 2006 18:02:40 -0800 From: Rich Wales User-Agent: Thunderbird 1.5 (Windows/20051025) MIME-Version: 1.0 To: current@freebsd.org References: <20060102221948.EBE475D09@ptavv.es.net> <80965.1136240851@critter.freebsd.dk> <20060102232208.GC42228@cirb503493.alcatel.com.au> <20060103014508.948273C9ED@whodunit.richw.org> <20060103063656.GF42228@cirb503493.alcatel.com.au> In-Reply-To: <20060103063656.GF42228@cirb503493.alcatel.com.au> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Message-Id: <20060104020241.086DD3C9ED@whodunit.richw.org> Cc: Subject: Re: FreeBSD handles leapsecond correctly X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Jan 2006 02:02:44 -0000 Peter Jeremy wrote: > The Islamic calendar (at least the concensus from some googling) > appears to have 11 leap years in a 30 (lunar) year cycle . . . AFAIK, no, this is not correct. The Islamic calendar is a 12-month, strictly lunar (=not= lunisolar) calendar. The Islamic year is 11 days shorter than a solar year, and there is =no= correction for this discrepancy, so any given Islamic month/day will drift through the seasons over a period of about 33 years. This is why, for example, the Islamic month of fasting (Ramadan) is a little earlier every year (same lunar month, but different solar calendar dates). > . . . and it seems that there isn't even general agreement on > which years are leap years. As I said, there's no such thing as a "leap year" in the Islamic calendar. Were you perhaps reading about how the start of each month (and, thus, the length of each month) is traditionally determined by actual observation of the young crescent moon? Rich Wales richw@richw.org