Eli5 what is the point in leap years ,like why do we have them?
In: 3
The earth doesn’t travel around the sun in exactly 365 days. It’s closer to 365 and a quarter days. If we didn’t add a day every 4 years, slowly but surely the axial tilt of the earth relative to the sun would make our seasons shift forward so that February would start to feel like March and March would start to feel like April, etc.
Some years also have a leap second added because adding a day every 4 years still doesn’t keep it exact.
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