What Is a Leap Year?

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By jamie
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4. Gregorian Calendar

The Julian Calendar went some way to solving the problem, but it was still not enough because there was still another 11 minutes and 14 seconds to be accounted for. It was in 1582 that Pope Gregory XIII made a modification to the Julian calendar to help make up for the difference.

The new calendar meant that no century year would be a leap year. This excluded century years that are divisible by 400. To help make this work, the pope removed 10 days from the calendar in 1582. This new calendar was named the Gregorian calendar, after the pope that developed it, and we still use the same calendar today.

Leap Year

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