Click on a button to activate it.
Notes: The calculator first checks if the year is divisible by 4, and if it is, it checks if it's divisible by 100. If it is, then it checks for if the last 3 digits are 0. Basically, if the year is a multiple of 4 and is not divisible by 400, or a multiple of 400, then it's a leap year. Credits: All credit to me.
