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en.wikipedia.org/wiki/Leap_year

A leap year is a calendar year containing one additional day added to keep the calendar year synchronized with the astronomical or seasonal year. Because ...

support.microsoft.com/en-us/help/214019/method-to-determine-whether-a-year-is-a-leap-year

Describes how to determine whether the year in a date that is used in an Excel document is a leap year.

stackoverflow.com/questions/725098/leap-year-calculation

Apr 7, 2009 ... There's an algorithm on wikipedia to determine leap years: function isLeapYear ( year): if ((year modulo 4 is 0) and (year modulo 100 is not 0)) ...

www.mathsisfun.com/leap-years.html

Leap Years are any year that can be evenly divided by 4 (such as 2012, 2016, etc). not, except if it can be evenly divided by 100, then it isn't (such as 2100, 2200 ...

www.wikihow.com/Calculate-Leap-Years

How to Calculate Leap Years. To calculate if a year is a leap year is easy. Start off using the year you want to calculate.

exceljet.net/formula/year-is-a-leap-year

If you want to test whether the year of a certain date is a leap year, you can use a formula that uses the MONTH, YEAR, and DATE functions. In the example ...

www.timeanddate.com/date/leapyear.html

Feb 29, 2016 ... A leap year has 366 days, as opposed to a common year, which has 365. ... This formula produced way too many leap years, but was not ...

www.perlmonks.org/?node_id=32583

Sep 15, 2000 ... The leap year formula is: A leap year is divisable by 4, but not by 100 (except if divisable by 400.) if( 0 == $year % 4 and 0 != $year % 100 or 0 ...

www.extendoffice.com/documents/excel/1768-excel-check-if-leap-year.html

In Excel, there is no direct method for you to check it, but you can create user defined function or formula to solve this problem. Check if a year is a leap year with ...