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From: ags@pucc-i (Dave Seaman)
Newsgroups: net.puzzle
Subject: Re: Computer bugs in the year 4000
Message-ID: <903@pucc-i>
Date: Mon, 18-Feb-85 09:53:15 EST
Article-I.D.: pucc-i.903
Posted: Mon Feb 18 09:53:15 1985
Date-Received: Thu, 21-Feb-85 07:20:34 EST
References: <282@ttidcb.UUCP>
Organization: Purdue University Computing Center
Lines: 16

>  Fact:     The Gregorian calendar has 365.24225 days per year. It accom-
>  	  plishes this by having a uniform rule with 3 orders of
>  	  exception.
>  
>  	     Uniform  rule:  All years consists of 365 days, except
>  	     1st exception:  Any year divisible by 4 has 366 days, except
>  	     2nd exception:  Any year divisible by 100 has 365 days
>  			     unless also divisible by 400, in which case
>  			     it has 366 days, except
>  	     3rd exception:  Any year divisible by 4000 has 365 days

I count three exceptions and one "unless."  Apparently the 400-year
rule is a second-order exception (All the exceptions are exceptions
except the 400-year exception).
-- 
Dave Seaman			 ..!pur-ee!pucc-i:ags