how is a leap year calculated ?

Answer 1

Rule 1: Any year evenly divisible by 400 IS a leap year.
Rule 2: Any year evenly divisible by 100 is NOT a leap year, unless it conflicts with Rule 1.
Rule 3: Any year evenly divisible by 4 IS a leap year, unless it conflicts with Rule 2.
Rule 4: All other years are NOT leap years.

Examples: 1896 was a leap year (rule 3), 1900 was NOT a leap year (rule 2); 1996 was a leap year (rule 3), 2000 was also a leap year (rule 1).

Answer 2

Leap years are put into the calendar because a year (the amount of time it takes the earth to revolve around the sun) is not actually 365 days long. It's closer to 365 1/4 days long. So each year, we end up with an extra 1/4 of a day left over at the end of the year!

Every four years, we add a day to they year, giving February 29 days, to make up for it. It's easy to remember when that will happen because it's done when the year is divisible by 4 (without a remainder).

There's one place where it gets tricky. It actually takes a tiny bit less than 365 1/4 days for the earth to revolve around the sun. Therefore, not ALL years that are divisible by 4 are leap years. If a year is a century year (1700, 1800, 1900, 2000, 2100, etc) and it is not divisible by 400, then it is not a leap year. So 2000 was a leap year because 2000 is evenly divisible by 4, but 2100 will not be a leap year because 2100/4 has a remainder.

Answer 3

The previous answers are correct if you mean how do you know when it is a leap year. If you are interested in how the calculation is done or why, read on.

The Gregorian calendar, the current standard calendar in most of the world, adds a 29th day to February in all years evenly divisible by 4, except for centennial years (those ending in -00) which are not evenly divisible by 400. Thus 1600, 2000 and 2400 are leap years but 1700, 1800, 1900, 2100, 2200 and 2300 are not.

The reasoning behind this rule is as follows:

The Gregorian calendar is designed to keep the vernal equinox on or close to March 21, so that the date of Easter (celebrated on the Sunday after the 14th day of the Moon that falls on or after 21 March) remains correct with respect to the vernal equinox. The vernal equinox year is currently about 365.242375 days long.
The Gregorian leap year rule gives an average year length of 365.2425 days.
This marginal difference of 0.000125 days means that in around 8,000 years, the calendar will be about one day behind where it should be. But in 8,000 years, the length of the vernal equinox year will have changed by an amount which can not be accurately predicted. Therefore, the current Gregorian calendar suffices for practical purposes.

Answer 4

If a year is a multiple of four, then it is a leap year unless it is a multiple of 100 but not 400. Thus 1984 was a leap year and 1900 was not (because it is a multiple of 100 but not 400); 2000, which is a multiple of 400, was however, a leap year. Intriguingly, years that are multiples of 20,000 will not be leap years, marking a further subtle refinement in the calendric system of which your other respondents seem unaware.

Answer 5

If the 12 months is divisible by employing 4 yet no longer in spite of the fact that if it extremely is divisible by employing one hundred till it is likewise divisible by employing 4 hundred. In different words 1700, 1800, and 1900 are no longer leap years yet 2000 grew to become right into a leap 12 months. Z

Answer 6

A leap year is found very simply. The earth revolves around the sun in 365.25 days. They simply take the .25 and save it till the fourth year. Added up it comes to a full day. Thus we have Feb. 29 once every four years. This allows us to stay on time with the earth's trip around the sun.

Answer 7

A leap year is a which can be divided by 4.However,years in hundreds which can not divided by 400 is not a leap year.

Answer 8

Every year has 365.25 days,so:
365.25 days x 4 years = 365 + 365 + 365 + [366]
= 1461 days
Every time,in the fourth year,we will call it as a 'leap year'.

Answer 9

it comes four years once...u take the year and divide it by 4...if you don't get a remainder, it's a leap year!!!!