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Dr. Math FAQ: What Are Leap Years?
From the Math Forum Newsletter: What are leap years?
2012 is a leap year, so this month ends on Wednesday, February 29th.
In the leap year of 1996, the Forum began a free ask-an-expert service for math students and their teachers. Since then, Ask Dr. Math has helped millions understand why some years have 366 days, plus lots more mathematics about calendars, including
- how to take leap years into account when reasoning the day of the week one year forward from any given date
- how to determine the day of the week for any date
- the surprising commonality of Friday the 13ths (2012 has the maximum number, with two more to go)
Find out the answers at http://mathforum.org/dr.math/faq/faq.calendar.html
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