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common year / leap year



1. leap days:


The reason for adding leap days to the calendar is to align the calendar year with the actual year – which is defined by the time it takes Earth to circle the sun. It is equal to 365 days, 5 hours, 48 minutes and 46 seconds, or 365.24219 days.








.  leap year or not?


A leap year is exactly divisible by 4 except for century years (years ending with 00). The century year is a leap year only if it is perfectly divisible by 400. If a year is divisible by 4, 100 and 400, it's a leap year. If a year is divisible by 4 and 100 but not divisible by 400, it's not a leap year. If a year is divisible by 4 but not divisible by 100, it's a leap year. If a year is not divisible by 1, it's not a leap year. This logic can be implemented in any programming language.

why do we need leap days?


leap year or not?

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