Leap Year traditions run thin, unless you're born on February 29 and then you better being getting four times as many presents and four times as blasted, except for the odd tradition of women proposing marriage. In the olden days, because officials didn't think of leap year days as legal days, and thus women would be bold in a very Opposite-Day kind of way and ask men for their hands in marriage. In the U.S., this became known as Sadie Hawkins Day, though sometimes it's celebrated in November, as a good way to get mix things up at fall high school dances.
More about Leap Year from the U.S. Navy.
