High Quality Content by WIKIPEDIA articles! Micheal Day (b. October 9, 1984 in Tarzana, California USA) is a professional American "Current School" Bicycle Motocross (BMX) racer whose prime competitive years are from 2002–Present. His nickname is a play on a common phrase. Mike Day`s official Union Cycliste Internationale (UCI) number, which was originally assigned to him by the American Bicycle Association (ABA) (not affiliated to the UCI), he requested for it from and is assigned it by the UCI for life regardless of how he does in a race season, is #365. With the exception of quadrennial leap years, that is the number of days in a calendar year. As a result, a play on his surname "365 Day" occurs from the common phrase "...365 days a year" (alternatively "..365 days per year"):