Question.
What is a leap year?
( Chapter 3: Motions of the Earth, Class 6- The Earth: Our Habitat ( GEOGRAPHY), SOCIAL SCIENCE)
Answer.
A leap year is a year that contains an extra day, February 29th, in order to keep our calendar year synchronized with the astronomical year.
In the revolution motion of earth, earth takes 365 days and 6 hours to one revolution around sun, , not exactly 365 days. However, we only consider 365 days in normal year. After each four years, this left six hours make (6*4)=1 day. After each four years come a leap year. In the leap year, there is 366 days in year. In the leap year, February month happens in 29 days.
However, this rule has an exception: Years that are divisible by 100 but not divisible by 400 are not leap years. For example, the year 1900 was not a leap year, but the year 2000 was.
This adjustment helps to keep our calendar more accurate with the Earth's orbit. Leap years help ensure that our calendar year closely matches the time it takes for Earth to complete its orbit around the Sun.
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