In 1974, the three-day week in Britain meant that Saturday became a full working day – limiting attendance at football grounds. Evening matches were a no-go, given clubs were banned from using floodlights. So the only solution was to play matches on Sunday. The idea was initially unpopular – Brian Clough said “if Sunday football comes in, I walk out” – but it 50 years later it is now a permanent fixture of English football.