Page "Closings and cancellations following the September 11 attacks" Paragraph 49

** The National Football League postponed football games on September 16 and Monday night game the following night.

Those games and the playoffs were pushed back at the end of the regular season.

Super Bowl XXXVI was then moved to February 3, the first time the game had been played in that month.

The following year, Super Bowl XXXVII was held at the end of January, but the Super Bowl was moved back to February ( presumably for reasons unrelated to 9 / 11 ) the following year and has been held in that month ever since.