Leap's Day is a story about the calendar, friendship and the things that make us special. Join Leap as he sets out to find a special day - a "birthday" - for ea

On her fourth Leap birthday, when she turns sixteen, Josie has a number of momentous experiences, including taking her driver's test, auditioning for a school p

An invaluable resource for working programmers, as well as a fount of useful algorithmic tools for computer scientists, astronomers, and other calendar enthusia