Every four years is a leap year: except every century year is not: except every 400 yeas is a leap year. Thus 1900 was not a leap year, but 2000 is (divisible by 400) At 06:33 PM 2/25/98 +0000, you wrote: >According to my astronomy text even centuries are not leap years. Do you >have some information that this has been changed for 2000? ---------------------------------------------------------- Ira J. Lund Cumberland Family Software, Clarksville, Tennessee, USA Genealogy Software for Beginners and Professionals E-mail: ira.lund@cf-software.com http://www.cf-software.com