February 29, 2016—Leap Day!
Ancient Egyptians discovered that the solar calendar and the man-made calendar didn’t match up. It takes the Earth 365 days to travel around the sun, but the Egyptians realized that actually it takes 365 days, 5 hours, 48 minutes and 46 seconds. The additional time amounts to an extra day on the man-made calendar. Sosigenes was a Greek astronomer who proposed the Leap Day solution to Julius Caesar who officially added the year into the Roman calendar over 2,000 years ago.
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