World Library  
Flag as Inappropriate
Email this Article

Century leap year

Article Id: WHEBN0020839575
Reproduction Date:

Title: Century leap year  
Author: World Heritage Encyclopedia
Language: English
Subject: 2000, Gregorian calendar, February 29, 1600, Leap year
Publisher: World Heritage Encyclopedia

Century leap year

In the Gregorian calendar, an end-of-century leap year (often referred to as a century leap year) is a year that is exactly divisible by 400 and, as with every other leap year, qualifies for the intercalation of February 29. End-of-century years that are not divisible by exactly 400 are common years. The years 1600, 2000, and 2400, for example, are end-of-century leap years in a century with 36,525 days. The end-of-century years 1800, 1900, 2100, 2200, 2300 and 2500 are common years in a century with 36,524 days. End-of-century leap years always start on a Saturday, and thus the resulting upcoming February 29 (the leap day) is always on a Tuesday.

The end-of-century year "divisible by 400" rule of the Gregorian calendar was considered an improvement over the previously utilized Julian calendar which had provided for a leap year at four year intervals. Over time, the Julian practice resulted in too many leap days being added to the calendar, thus causing it to gradually drift with respect to the astronomical seasons of the years (and natural events, such as the spring equinox, to occur earlier and earlier in the calendar).

See also


External links

  • An Introduction to Calendars courtesy of the United States Naval Observatory
  • Frequently Asked Questions about Calendars
  • History of Gregorian Calendar
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from World Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.