In 2004, NBC reached a broadcast agreement with the National Hockey League (NHL). The revenue-sharing deal called for the two sides to split advertising revenue after the network recouped the expenses. Games were supposed to begin airing on the network during the 2004–05 season, however a league 2004–05 NHL lockout that resulted in the cancellation of that season delayed the start of the contract until the second half of the 2005–06 NHL season. NBC televised regular season games at first on Saturday afternoons before moving the telecast to Sundays, Saturday and Sunday afternoon playoff games, and up to five games of the Stanley Cup. Additionally in 2008, NBC broadcast the 2008 NHL Winter Classic, an outdoor NHL game played on New Year's Day at Ralph Wilson Stadium, a success in attendance and television ratings. The following year's Winter Classic would become the most-watched regular season game in 34 years. In addition to this regular season success, Game 7 of the 2009 Stanley Cup Final was watched by an average of 8 million viewers, the highest ratings for an NHL game in 36 years.