The year is 366 days a year with athiksunthin we can calculate for by the year divided by 4, but if in the year divided by 100 a year, but if the athiksunthin will not be divided by 400 to be athiksunthin year.
Year is a leap year with 366 days. , we can calculate it by taking the year to find out if the year is divisible by 4 but not divisible by 100 are leap years only if divisible by 400, divided down to a leap year.
Leap year is the year with 366 day we can calculate determined by the year contributes with 4 but if that year divided by the 100 balance will not be leap years, but if the 400 interiors is a leap year.