Races in calendar week 20/2021
All motorsport events on the weekend of 21–23 May 2021.
| Circuit | Country | Series |
|---|---|---|
| Austin |  USA |
|
| Birmingham (Barber Motorsport Park) | USA |
|
| Bowmanville (Mosport) |  Canada |
|
| Brands Hatch |  Great Britain |
|
| Marrakesh |  Morocco |
|
| Monte Carlo |  Monaco |
|