Gregorian calendar Hear it!

Gregorian calendar definition

Gregorian calendar

a corrected form of the Julian calendar, introduced by Pope Gregory XIII in 1582 and now used in most countries of the world: it provides for an ordinary year of 365 days and a leap year of 366 days every fourth, even year, exclusive of the final year of a century, which is a leap year only if exactly divisible by 400

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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