The National Football League (NFL) is a professional American football league composed of 32 teams divided equally between the National Football Conference (NFC) and the American Football Conference (AFC). The highest level of professional football in the world, the NFL runs a 17-week regular season from the week after Labor Day to the week after Christmas, with each team playing sixteen games and having one bye week. Out of the league's 32 teams, six (four division winners and two wild-card teams) from each conference compete in the NFL playoffs, a single-elimination tournament culminating in the Super Bowl, played between the champions of the NFC and AFC. The champions of the Super Bowl are awarded the Vince Lombardi Trophy; various other awards exist to recognize individual players and coaches. Most games are played on Sunday afternoons; some games are also played on Mondays and Thursdays during the regular season. There are games on Saturdays during the last few weeks of the regular season and the first two playoff weekends.
The NFL was formed on August 20, 1920, as the American Professional Football Conference; the league changed its name to the American Professional Football Association (APFA) on September 17, 1920, and changed its name to the National Football League on June 24, 1922, after spending the 1920 and 1921 seasons as the APFA. In 1966, the NFL agreed to merge with the rival American Football League (AFL), effective 1970; the first Super Bowl was held at the end of that same season in January 1967. Today, the NFL has the highest average attendance (67,591) of any professional sports league in the world and is the most popular sports league in the United States. The Super Bowl is among the biggest club sporting events in the world and individual Super Bowl games account for many of the most-watched programs in American history. At the corporate level, the NFL is an nonprofit 501(c)(6) association. The NFL's executive officer is the commissioner, who has broad authority in governing the league.
Television is one of the major mass media of the United States. Household ownership is 96.7% and the majority of households have more than one. Its peak was the 1996-1997 season with 98.4% ownership.  As a whole, the television networks of the United States are the largest and most syndicated in the world.
As of August 2013, there are approximately 114,200,000 American households with television.
American football (known as football in the United States and gridiron in some other countries) is a sport played by two teams of eleven players on a rectangular field 120 yards long by 53.33 yards wide with goalposts at each end. The offense attempts to advance an oval ball (the football) down the field by running with or passing it. They must advance it at least ten yards in four downs to receive a new set of four downs and continue the drive; if not, they turn over the football to the opposing team. Points are scored by advancing the ball into the opposing team's end zone for a touchdown, kicking the ball through the opponent's goalposts for a field goal or by the defense tackling the ball carrier in the offense's end zone for a safety. The team with the most points at the end of a game wins.
American football evolved in the United States, originating from the sport of rugby football. The first game of American football was played on November 6, 1869 between two college teams, Rutgers and Princeton, under rules resembling rugby and soccer. A set of rule changes drawn up from 1880 onward by Walter Camp, the "Father of American Football", established the snap, eleven-player teams and the concept of downs, and later rule changes legalized the forward pass, created the neutral zone and specified the size and shape of the football.
CBS Sports is the sports division of the American television network CBS. Its headquarters are in the CBS Building on West 52nd Street in midtown Manhattan, New York City, with programs produced out of Studio 43 at the CBS Broadcast Center on West 57th Street. David Beeston is the president of CBS Sports.
It broadcasts a diverse array of sporting events, including the NFL, Southeastern Conference football, NCAA basketball (including telecasts of the NCAA Men's Basketball Tournament), PGA golf, and professional tennis.
Fox Sports is the brand name for a number of sports channels, broadcast divisions, programming, and other media around the world that are either controlled or partially owned by the family of Rupert Murdoch. These assets are held mainly by 21st Century Fox, with the exception of the operations in Australia, which are part of News Corp. (21st Century Fox and News Corp are the two companies resulting from the breakup of the larger News Corporation in mid-2013; the Murdoch family retains voting control of both entities.)
The name originates from the Fox Broadcasting Company in the United States, which in turn was derived from the name of the Fox Film Corporation (later 20th Century Fox). The Fox Sports name has since been used in 21st Century Fox's and News Corp's other sports media assets around the world.
The National Football League occasionally schedules matchups on Christmas, December 25 or Christmas Eve, December 24.
Unlike their traditional Thanksgiving Day counterparts, Christmas Day and Christmas Eve games in the National Football League are not a regular annual part of the schedule. The NFL only schedules a Christmas game on a night when football would be played anyway, and has only scheduled regular season games on Christmas Day since 1989. Through the 2011 season, there have been 17 Christmas Day contests.
The National Football League on Thanksgiving Day is a traditional series of games played during the Thanksgiving holiday in the United States. It has been a regular occurrence since the league's inception in 1920. Currently, three NFL games are played every Thanksgiving. The first two are hosted by the Detroit Lions and the Dallas Cowboys, with one team from each conference playing either team on a rotating basis; a third game, with no fixed opponents, has been played annually since 2006.