In a standard-length hockey game, there are three periods. Each hockey game consists of three periods: the first, the second, and the third.
Each game consists of three 20-minute periods separated by two 15-minute pauses, for a total of one hour. If the game is tied at the conclusion of regulation, sudden death overtime is played, and if it remains tied after that, a shootout determines the winner. Rules governing post-regulation play differ between regular season and postseason contests, and Olympic hockey, NHL hockey, and other leagues employ their own overtime and shootout formulas.