Date: Tue, 03 Jan 2006 18:02:40 -0800 From: Rich Wales <richw@richw.org> To: current@freebsd.org Subject: Re: FreeBSD handles leapsecond correctly Message-ID: <20060104020241.086DD3C9ED@whodunit.richw.org> In-Reply-To: <20060103063656.GF42228@cirb503493.alcatel.com.au> 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>
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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
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