- Monaco Grand Prix
- Reutemann wins after early pile-up
-
May 18, 1980: Carlos Reutemann won an action-packed and wet Monaco Grand Prix for Williams, a race marked by a spectacular four-car first-corner pile-up
- Belgian Grand Prix
- Dominant Pironi takes maiden win at Zolder
-
May 4, 1980: Didier Pironi won the Belgian Grand Prix, the first race of the European season, having led from start to finish at the tight circuit of Zolder