The Normal Season The Major League Baseball season lasts from April 1 to September 30, with each team playing 162 games. That equates to one day off every 10 days, making baseball a "game-a-day" sport. In addition to the regular season, there is also a postseason series of game-specific rules known as "playoffs". These begin with the Division Series and end with the World Series. Since its establishment in 1876, baseball's normal season has lasted between 6 and 7 months. In the early years of the league, when travel was not yet possible, most teams played only within their own territory, so there were no scheduled off days during which they could rest players or build up endurance. As roads improved, so did transportation, and by the 1920s, most major-league cities had established some form of calendar, usually including a designated holiday for baseball fans. Today, all 30 major-league teams have at least one off day each month, except for when they play multiple games on the same day (such as opening day) or when they take part in any form of playoff action. In these cases, they may have as few as three days off per month or as many as five, depending on how far they advance in the playoffs.