 Complete the following phrase:  The National Football League Kickoff game, along with related festivities, marks the official start of the National Football League NFL regular season. A single game is held, preceded by a concert and other ceremonies. This first game of the season is usually scheduled for the Thursday following Labor Day and since 2004, it was hosted by the current Super Bowl champions. However, in 2012, the game was moved to Wednesday to prevent conflicts with the acceptance speech of the 