The Premier League, often referred to outside the UK as the English Premier League, or sometimes the EPL, (legal name: The Football Association Premier League Limited) 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.