From: utzoo!decvax!harpo!ihnp4!ihldt!ihtnt!fjg Newsgroups: net.misc Title: 400 Year Cycle of Gregorian Calendar Article-I.D.: ihtnt.246 Posted: Fri Jan 21 12:48:43 1983 Received: Sat Jan 22 04:58:38 1983 Due to the leap-year rule of the Gregorian calendar, the sequence of years/leapyears repeates after 400 years. Is it just a one in seven chance that a given date falls on the same day of the week 400 years later ? October 1752 October 2152 S M Tu W Th F S S M Tu W Th F S 1 2 3 4 5 6 7 1 2 3 4 5 6 7 8 9 10 11 12 13 14 8 9 10 11 12 13 14 15 16 17 18 19 20 21 15 16 17 18 19 20 21 22 23 24 25 26 27 28 22 23 24 25 26 27 28 29 30 31 29 30 31 Joe Glynn BTL IH ihtnt!fjg