The Qatar Stars League, known as Ooredoo Stars League for sponsorship reasons, is the top level football league in Qatar football league system. Contested by 12 teams, it operates on a system of promotion and relegation with the Qatari Second Division. The QSL season usually runs from September to April. The league's first season was played in 1963, although the first official season occurred in 1972. The league currently features 12 clubs, with one club being demoted to make room for one club being promoted.