The Premier League, often referred to outside England as the English Premier League or the EPL, is the top level of the English football league system. Contested by 20 clubs, it operates on a system of promotion and relegation with the English Football League (EFL). Seasons run from August to May with each team playing 38 matches (playing all 19 other teams both home and away).Most games are played on Saturday and Sunday afternoons. Forty-nine clubs have competed since the inception of the Premier League in 1992: forty-seven English and two Welsh clubs. Seven of them have won the title: Manchester United (13), Chelsea (5), Manchester City (4), Arsenal (3), Blackburn Rovers (1), Leicester City (1) and most recently Liverpool (1).