The need to keep the year of the calendar in line with the actual position of the Earth in relation to the sun. A year is roughly 365 and a quarter days therefore if unchecked the calendar will lapse and will end up getting behind the seasons.
leap years come every 4 years and last a year
Leap years come every 4 years
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Leap years are years which have one extra day, February 29th. These leap years come around once every 4 years, except those divisible by 100.
There are 4 years between every leap year. Correction: There are 4 years between MOST leap years. That's the case 99.25% of the time. For the other 0.75% of the time, there are 8 years between leap years.
Every four years on the 29th February
Generally speaking, years that are evenly divisible by 4 are leap years. However years that are evenly divisible by 100 are not leap years, unless they are also evenly divisible by 400, in which case they are leap years2000 mod 4 = 02000 mod 400 = 0So 2000 was a leap year, as was 1600. 1700, 1800 and 1900 were not. 2100, 2200, 2300 will not be leap years; 2400 will be.
it takes 4 years sometimes on a leap year
More accurately it is 365.25 days. We account for this with leap years, which come every 4 years. A leap year has 366 days.
No, but 2004 and 2008 were both leap years.
February is the month that has an extra day in leap years.
As of and including 2012, there have been twelve leap years since 1966. Simply taking the number of elapsed years and dividing by four will only get you the correct answer part of the time, since it mathematically assumes the year before you start counting is a leap year.