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Why Leap Year Is Necessary: Animation Shows What Happens Without It
Chapel Hill - latest news, breaking stories and comment - The
Why does a leap year have 366 days?
What is a leap year, and why do they happen? Everything to know
Why do we have leap years?
Earth - latest news, breaking stories and comment - The Independent
Leap year. It's a delight for the calendar and math nerds among us
The Lowdown On Leap Year: Why Do We Add That Extra Day?
Roman Empire - latest news, breaking stories and comment - The
What would happen if we didn't have a 'leap year