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leap year

A Dictionary of Astronomy | 1997 | Copyright

leap year A year with one extra day (February29) and therefore 366 days long. The day is added to keep the vernal equinox on or around March21. In the Julian calendar, every fourth year was a leap year. In the Gregorian calendar, century years are not leap years unless divisible by 400; hence three leap years are omitted in a 400-year period.

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"leap year." A Dictionary of Astronomy. 1997. Encyclopedia.com. 31 May. 2012 <http://www.encyclopedia.com>.

"leap year." A Dictionary of Astronomy. 1997. Encyclopedia.com. (May 31, 2012). http://www.encyclopedia.com/doc/1O80-leapyear.html

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leap year

The Oxford Pocket Dictionary of Current English | 2009 | Copyright

leap year • n. a year, occurring once every four years, that has 366 days including February 29 as an intercalary day.

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"leap year." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. 31 May. 2012 <http://www.encyclopedia.com>.

"leap year." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. (May 31, 2012). http://www.encyclopedia.com/doc/1O999-leapyear.html

"leap year." The Oxford Pocket Dictionary of Current English. 2009. Retrieved May 31, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O999-leapyear.html

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leap year

The Columbia Encyclopedia, 6th ed. | 2011 | Copyright

leap year see calendar .

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"leap year." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. 31 May. 2012 <http://www.encyclopedia.com>.

"leap year." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. (May 31, 2012). http://www.encyclopedia.com/doc/1E1-X-leapyear.html

"leap year." The Columbia Encyclopedia, 6th ed.. 2011. Retrieved May 31, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-X-leapyear.html

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Free newspaper and magazine articles

	Martin's leap years; Celtic gaffer's touchline antics have made superb... Newspaper article from: Sunday Mail (Glasgow, Scotland); 4/6/2003
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