Michael Day

Michael or Mike Day may refer to:


 * Michael Day (guitarist), American guitarist
 * Michael Day (cricketer) (born 1974), Australian cricketer
 * Mike Day (darts player) (born 1955), New Zealand darts player
 * Mike Day (cyclist) (born 1984), American bicycle motocross (BMX) racer
 * Michael S. Day, member of the Massachusetts House of Representatives
 * Michael Day (paleoanthropologist), British anatomist and paleoanthropologist
 * Mikey Day (born 1980), American comedian