The Women's National Basketball Association (WNBA) is a women's professional basketball league based in the United States and is composed of 12 teams. The league was founded on April 24, 1996, as the women's counterpart to the National Basketball Association (NBA). League play began in 1997. The regular season runs from May to September, with each team playing 40 games. The top eight teams qualify for the playoffs, culminating in the WNBA Finals, which is played in October. The All-Star game occurs midway through the season in July. The league hosts an annual mid-season competition, The Commissioner's Cup, which dates vary from year to year.