Q.

How a leap year has one day more than a normal year? Does the earth take 1 day more to go around the sun after every four years?

Asked by joyesh chakraborty,
27 Oct '09 11:05 am

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Answers (6)

1.

The earth takes around 365.2425 24-hour days to complete one revoultion around the sun. This translates to 97/400. So that means that every 400 years, we have to adjust for 97 days. In other words , 97 years out of 400 must be leap years. hence the logic that every 4th years, except those that are noth divisible by 100, but not divisible by 400 will be leap year. A simple alogirthm for his calculation is given below

If Year divisible by 400 ========= Leap year

If not divisible by 400 ============== (If year divisible by 100 ---- not leap year,

.......................................................... .............. if year divisible by 4------ leap year)

Answered by RAJAN MHAMAI, 27 Oct '09 05:13 pm
If Year divisible by 400 ========= Leap year

If not divisible by 400 ============== (If year divisible by 100 ---- not leap year,

.......................................................... .............. if year divisible by 4------ leap year)

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2.

Earth takes approximately 365.2475...days to complete a rotation about sun.We consider a year to be of 365 days,hence we are loosing a little less than a day in every four years.To compensate this we take one leap year in every 4 years & in the process in every 400 years we take 1 extra day.Thus we omit leap year in every 400 years.

Hence according to Gregorian Calender if the year be divisible by 4 we take 29 days for the month of February,but if divisible by 400 ,February will have usual 28 days.

Answered by Santiranjan Pal, 27 Oct '09 11:17 am
Hence according to Gregorian Calender if the year be divisible by 4 we take 29 days for the month of February,but if divisible by 400 ,February will have usual 28 days.

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3.

Per year its 365.25 days. Hence one day is added for the leap year

Answered by MajorVLoganathan, 27 Oct '09 11:06 am
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4.

In revised Julian calender the month February has an extra day in the years divisible by four, except for years divisible by 100. This rule agrees with the rule for the Gregorian calendar until 2799. The first year that dates in the Revised Julian calendar will not agree with those in the Gregorian calendar will be 2800, because it will be a leap year in the Gregorian calendar but not in the Revised Julian calendar.

This rule gives an average year length of 365.242222...days. This is a very good approximation to the mean tropical year, but because the vernal equinox year is slightly longer, the Revised Julian calendar does not do as good a job as the Gregorian calendar of keeping the vernal equinox on or close to March 21.

In the Gregorian calendar, the current standard calendar in most of the world, most years that are divisible by 4 are leap years. In each leap year, the month of February has 29 days instead of 28. Adding an extra day to the calendar every four years compensat ...more

Answered by Jack Johnson, 27 Oct '09 11:23 am
This rule gives an average year length of 365.242222...days. This is a very good approximation to the mean tropical year, but because the vernal equinox year is slightly longer, the Revised Julian calendar does not do as good a job as the Gregorian calendar of keeping the vernal equinox on or close to March 21.

In the Gregorian calendar, the current standard calendar in most of the world, most years that are divisible by 4 are leap years. In each leap year, the month of February has 29 days instead of 28. Adding an extra day to the calendar every four years compensat ...more

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6.

Sum of the balance of 6 hours of each yaar which is not counted collectively makes one full day in leap yaear.

Answered by mitali despande, 27 Oct '09 11:18 am
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