Heheh I was reading about this on a forum the other day. Apparently you guys are all special and are called "Leaplings" Many restaurants in various States were giving free meals for the first 29 Leaplings who turned up. Presumably with birth certificates.
There is even a "Society" for you, and the spokesman when asked about the birth certificate thing said those who claim their birth date as 28th Feb were "Strict Februarians" and those who opted for 1st March were "in denial". LOL.