Playing hockey games outdoors—in soccer, football and baseball stadiums—is an increasingly popular trend for junior, college, professional and international competitions in the 21st century.
To compensate for the varying weather conditions at outdoor ice hockey games, the teams may switch sides after each half of a period.
[3] In 1954, the Detroit Red Wings of the National Hockey League (NHL) played an exhibition game on an outdoor ice surface against the inmates of Michigan's Marquette Branch Prison.
[4] While the New York Rangers and the Los Angeles Kings played an NHL exhibition game in 1991 outside Caesars Palace in Las Vegas,[5] the modern trend for outdoor competition began in 2001.
[6] The NHL's first regular season outdoor game ensued: the 2003 Heritage Classic, hosted by the Edmonton Oilers, who lost by a 4–3 score to the Montreal Canadiens.
The game broke the former European league-game record for attendance at that time with a crowd of 31,144 (beaten in February 2011 when Jokerit and HIFK played in front of 36,644 spectators).
[1][13][14] The record had previously been set at the opening game of the 2010 IIHF World Championship, in which the hosting Germans defeated the United States 2–1 before a then-record 77,803 fans.
[19] In the United States, the Winter Classics have been a ratings winner; 4.56 million people watched the 2011 Winter Classic, and the game led to a ratings win for NBC in the coveted 18–49 age group despite the fact that poor weather forced the NHL to move the start time of the game back several hours on less than a day's notice.