The 2017–18 NHL season was the 101st season of operation (100th season of play) of the National Hockey League. With the addition of a new expansion team, the Vegas Golden Knights, 31 teams competed in an 82-game regular season. The regular season began on October 4, 2017, and ended on April 8, 2018. The 2018 Stanley Cup playoffs began on April 11, 2018, and concluded on June 7, with the Washington Capitals winning their first Stanley Cup in the Finals over the Vegas Golden Knights in five games.