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From: colonel@sunybcs.UUCP (George Sicherman)
Newsgroups: net.followup
Subject: Re: Perpetual Calendar
Message-ID: <1077@sunybcs.UUCP>
Date: Mon, 20-Feb-84 15:02:43 EST
Article-I.D.: sunybcs.1077
Posted: Mon Feb 20 15:02:43 1984
Date-Received: Wed, 22-Feb-84 07:22:13 EST
References: <392@sequent.UUCP>
Organization: SUNY/Buffalo Computer Science
Lines: 14

Your perpetual calendar doesn't go back before 1753 because the present
system (3 centennial years out of 4 common) was adopted by Parliament
in 1752.  Pope Gregory had already ordained it for the Catholic world
in 1582, dropping 10 days from October to re-sync.  Parliament had to
drop 11, because 1700 was a leap year in England.

If I remember correctly, Pope Gregory preserved the succession
of weekdays, but Parliament did not - Monday the 2nd was followed
by Saturday the 14th.  This makes it impossible to get a meaningful
day of the week for any day before September 14, 1752.  (I still
don't see how Italy and England got together again!)

		Col. G. L. Sicherman
		...seismo!rochester!rocksvax!sunybcs!colonel