Leap Year Mystery
Is a Leap Year Determined by Divisibility by 4 or 400? Explained

Learn how leap years are determined based on the rules of divisibility by 4, 100, and 400 in the Gregorian calendar.

Leap Year Trick
How to Calculate a Leap Year: Simple Rules Explained

Learn how to calculate leap years with easy rules: divisible by 4, and if divisible by 100, also divisible by 400. Examples included.