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In the Gregorian calendar, the standard calendar in most of the world, [6] almost every fourth year is a leap year. Each leap year, the month of February has 29 days instead of 28. Adding one extra day in the calendar every four years compensates for the fact that a period of 365 days is shorter than a tropical year by almost six hours. [7]
The rule for leap years is: Every year that is exactly divisible by four is a leap year, except for years that are exactly divisible by 100, but these centurial years are leap years if they are exactly divisible by 400. For example, the years 1700, 1800, and 1900 are not leap years, but the year 2000 is. —
The Revised Julian Calendar, however, observes a leap year in 2900 instead; those Orthodox Churches (e.g. Greek) using the Revised Julian Calendar to calculate fixed-date feasts will, if no changes are made to the calendar before then, celebrate fixed-date feasts a day earlier than Catholic and Protestant churches from March 2800 until February ...
According to Air and Space, we skip a leap year when the year it would normally fall on is divisible by 100 but not divisible by 400. The last time leap year was skipped was in the year 2000 and ...
The year 2000 was a leap year, for example, but the years 1700, 1800, and 1900 were not. The next time a leap year will be skipped is the year 2100. The reason why the year is called a leap year ...
A year may be a leap year if it is evenly divisible by 4. Years divisible by 100 (century years such as 1900 or 2000) cannot be leap years unless they are also divisible by 400. (For this reason ...
It is the same as if 4 mod year = 0 and 100 mod year ≠ 0, then not a leap year, unless 400 mod year = 0, then it is a leap year. Sanity check {{is leap year|2000}} → 1: 2000 AD is effectively a leap year (in both the Julian and Gregorian calendars) .
This is an accepted version of this page This is the latest accepted revision, reviewed on 18 January 2025. 2001 January February March April May June July August September October November December This article is about the year 2001. For other uses, see 2001 (disambiguation). Calendar year Millennium: 3rd millennium Centuries: 20th century 21st century 22nd century Decades: 1980s 1990s 2000s ...