Leap years. They have the olympics (covid aside), they're divisible by 4, unless they're also divisible by 100, but still are if they're also divisible by 400. Somehow this was all worked out before 46BC when they were mandated by Julius Caesar.
Leap years. They have the olympics (covid aside), they're divisible by 4, unless they're also divisible by 100, but still are if they're also divisible by 400. Somehow this was all worked out before 46BC when they were mandated by Julius Caesar.