Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!sdd.hp.com!caen!uwm.edu!lll-winken!Firewall!ddsw1!infopls!hoffmann
From: hoffmann@infopls.chi.il.us (Robert Hoffmann)
Newsgroups: comp.lang.pascal
Subject: Re: Leap year function
Message-ID: <Jq8621w164w@infopls.chi.il.us>
Date: 19 May 91 01:38:18 GMT
References: <1991May17.074806.130@hls.com>
Organization: INFOPLUS support, Wheeling, IL
Lines: 16

neile@hls.com writes:

> > 	I'm looking for source for a function that determines whether or not a
> > year is a leap year.  Anybody got it.  ADVthanksANCE.
   
> The test for a leap year is simple; year mod 4 = 0.  There is no reason to
> add complexity as indicated in other postings.
 
Sure there is.  Several hundred years ago, the rules for century years 
(ones ending in 00) were changed... deleting 3 leap years every 400 years 
helps keep the calendar intact and the seasons happening on the right 
dates...
 
If (year mod 100) = 0, then if (year mod 400) <> 0, it's not a leap year.
 
That's why the complexity...