Dictionary
Grego'rian cal'endar
the reformed Julian calendar now in use, according to which the ordinary year consists of 365 days, and a leap year of 366 days occurs in every year whose number is exactly divisible by 4 except centenary years whose numbers are not exactly divisible by 400, as 1700, 1800, and 1900. See table under calendar.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
