USA.gov: Why are There Leap Years? 

usagov:

Tomorrow is February 29 instead of March 1 because this year is a leap year. But why do we have a leap year every four years?

Years and days are measured differently, and they don’t quite add up.

  • A year is the time for the earth to complete its annual orbit around the sun.
  • A day is the time…
@1 year ago with 52 notes
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    We also have a leap second sometime this year due to earthquakes! (earthquakes change the rotational speed of the Earth,...
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    Yes, I follow the United States Government and I learn things all the time.
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    “Thanks to that gap of 11 minutes, years that end in ‘00’ that are not exactly divisible by 400 are not leap years....
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