These events occured in 1900 in the world of hockey:
January
February
12–16 February — Montreal Shamrocks successfully defends the Stanley Cup, defeating Winnipeg Victorias in a best–of–three series 2–1.
March
- 5–7 March — Montreal Shamrocks defeats Halifax Crescents in a Cup challenge best–of–three series 2–0.
- 10 March — Montreal Shamrocks wins the Canadian Amateur Hockey League (CAHL) championship for the second successive season with a regular season record of 7–1.
April
May
June
July
August
September
October
November
December