20 May

1921 Aldo Gordini born 1926 Bob Sweikert born 1951 Nino Farina won the non-championship Paris Grand Prix 1962 Graham Hill won the Dutch Grand Prix 1962 Willy Mairesse won the non-championship Naples Grand Prix 1965 Edgar Barth died 1973 Jackie Stewart won the Belgian Grand Prix 1975 Ralph Firman born 1984 Bill Holland died 1984 Niki Lauda won the French Grand Prix