Hap Day, Canadian ice hockey player, referee, and manager (d. 1990)
Clarence Henry "Happy" Day (June 14, 1901 – February 17, 1990), later known as Hap Day, was a Canadian professional hockey player who played 14 seasons in the National Hockey League for the Toronto Maple Leafs and New York Americans. Day enjoyed a 33-year career as a player, referee, coach and assistant general manager, 28 of which were spent in various capacities with the Maple Leafs. He was inducted into the Hockey Hall of Fame in 1961.

His name appears on the Stanley Cup 7 times—1932 (as Captain), 1942, 1945, 1947, 1948, 1949 (as coach) and 1951 (as assistant manager); all with the Maple Leafs.