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Wonder why it's called 'leap year?'

It's called leap year, according to the editors of The Smithsonian magazine, because a common year is 52 weeks and one day. By adding an extra day, your birthday leaps ahead one day from Tuesday to Thursday.

While our usual year is 365 days, the actual time of a solar year is 365 days, 5 hours, 48 minutes, and 56 seconds.

By adding a day every four years, the calendar year 44 minutes longer.  Over a long period of time those 44 minutes would be enough to move seasons. In 700 years summer in the North hemisphere would arrive in December instead of June!

To compensate, we don't always have a 366-day year every four trips around the sun, we skip it in years that aren't divisible by 400.  Keep that in mind because in 76 years you can remember that's why 2100 won't be a leap year.  You're welcome.

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