It’s Leap Year: Did You Know This About Leap Day?

STORY AT-A-GLANCE

  • By 1577 the difference between the Julian calendar and the Earth’s position relative to the sun was out of sync by 10 days
  • A more accurate leap year system was commissioned by Pope Gregory XIII to synchronize the Earth’s movements around the sun with the calendar
  • The chance of being born on leap day is 1 in 1,461; those odds were broken by a Norwegian family
  • In addition to an extra day every four years, intermittently an extra second is added to the clock

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