[misc.misc] Interesting calendars

ken@aiva.ed.ac.uk (Ken Johnson) (01/26/89)

One of the exercises I set my Prolog students is to write a program that
given any date in the current year computes the day on which it fell,
e.g.  this year

	?- day(1,january,sunday).

is true.  (See note 1 below for Prolog people).  To make a supplementary
exercise I would be interested to know about any other calendars
interestingly different from our own (the Gregorian, I think).  Can
anyone email me about, say, the Muslim calendar or the French decimal
calendar of 1789?


1.  Mode of day/3 is day(+,+,?).  It is an interesting exercise to write
    it in mode day(?,?,?) so it will backtrack through all the Mondays or
    whatever, but I can't be bothered!!

-- 
==============================================================================
From:       Ken Johnson
Address:    AI Applications Institute, The University, EDINBURGH, Scotland
Phone:      031-225 4464 ext 212
Email:	    k.johnson@ed.ac.uk
Quotation:  I've had a rotten day at work so far. My best friend didn't come.