The Super Bowl is the annual championship game of the National Football League (NFL), the highest level of professional American football in the United States, becoming a season that begins in the late summer of the previous calendar year. The Super Bowl uses Roman numerals to identify each game, rather than the year in which it is held, with Super Bowl I being the 1966 season championship game, when the Green Bay Packers beat the Kansas City Chiefs. Super Bowl XLVI (46) was played at Lucas Oil Stadium in Indianapolis, on February 5, 2012, to determine the champion of the 2011 season; the New York Giants beat the New England Patriots. The game was created as part of a _ agreement between the NFL and its rival league, the American Football League (AFL). It was agreed that the two leagues' champion teams would play in an AFL--NFL World Championship Game until the merger was to officially begin in 1970. After the merger, each league was appointed as a "conference", and the game was then played between the conference champions. Currently, the National Football Conference (NFC) leads the series with 25 wins to 21 wins for the American Football Conference (AFC). The day on which the Super Bowl is played, now considered to be an existing American national holiday, is called "Super Bowl Sunday", though it is not determined by the government. It is the second--largest day for U.S. food consumption, after Thanksgiving Day. In addition, the Super Bowl has frequently been the most watched American television broadcast of the year. Because of its high viewership, commercial airtime during the Super Bowl broadcast is the most expensive of the year. Due to the high cost of investing in advertising on the Super Bowl, companies regularly develop their most expensive advertisements for this broadcast. As a result, watching and discussing the broadcast's commercials has become a significant aspect of the event. In addition, many popular singers and musicians have performed during the event's pre-game and halftime ceremonies because of the exposure's attracting more fans. What does the Super Bowl use to show each game?
The year when the game is held. English letters. Roman numerals Arabic numerals