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Home Geography

Why do we have leap years?

July 31, 2020
in Geography
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The year 2020 is a leap year

Reasons for a leap year

  • Earth’s orbit around the sun takes approximately 365.25 days. It’s that .25 that creates the need for a leap year every four years.
  • During leap years, a leap day is added to the calendar to slow down and synchronize the calendar year with the seasons.
  • Because astronomical events and seasons do not repeat in a whole number of days, calendars that have the same number of days in each year drift over time with respect to the event that the year is supposed to track.
  • By inserting (called intercalating in technical terminology) an additional day or month into the year, the drift can be corrected
  • It helps to synchronize our human-created calendars with Earth’s orbit around the sun and the actual passing of the seasons

What is a leap year?

  • A leap year (also known as an intercalary year or bissextile year) is a calendar year that contains an additional day added to keep the calendar year synchronized with the astronomical year or seasonal year.
  • There are 366 days in a leap year, as opposed to 365 in a non-leap year.
  • A leap year normally take place every four years
  • In 45 B.C. a decree by Julius Caesar began the practice of adding an extra day every four years, with the creation of the Julian calendar — making up for those quarter days.

 

 

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