The 2017 Stanley Cup playoffs began on April 12 and concluded on June 11, with the Pittsburgh Penguins winning the Stanley Cup over the Nashville Predators in six games. On June 11, the Pittsburgh Penguins became the first team to repeat as Stanley Cup champions since the Detroit Red Wings in 1997–98, winning the franchise's fifth Stanley Cup and their third in nine seasons.
On September 27, 2016, the NHL announced that it would organize a series of initiatives and events throughout 2017 to mark the league's 100th year of operations, and the upcoming 2017–18 season — the NHL's 100th season of play. The campaign began with the NHL Centennial Classic outdoor game on January 1, 2017, and continued throughout the calendar year, including documentaries and a daily "Time Capsule" feature across NHL media properties, a "Centennial Truck Tour" of all NHL cities with a traveling museum and other activities, a 2017 Winter Classic-themed float appearing during the Tournament of Roses Parade, and the unveiling of the top 100 players during the weekend of the All-Star Game, and the top 100 moments of the league's history later in the year.
A centennial emblem was designed, which was displayed on all game pucks and as shoulder patches on all jerseys throughout 2017. The centennial campaign extended into the following 2017–18 season. On March 17, 2017, the NHL announced that the Ottawa Senators would host an outdoor game against the Montreal Canadiens, the NHL 100 Classic, at TD Place Stadium on December 16, 2017.