Schedule
The following races counted towards the 1973 World Championship for Makes and the 1973 Cup for GT Cars.
| Rnd | Race | Circuit or Location | Date |
|---|---|---|---|
| 1 |  24 Hours of Daytona
|
Daytona International Speedway | 3 February 4 February |
| 2 |  Vallelunga 6 Hours
|
Vallelunga | 25 March |
| 3 |  Dijon 1000 Kilometres
|
Dijon-Prenois | 15 April |
| 4 | 1000km Monza
|
Autodromo Nazionale Monza | 25 April |
| 5 |  1000km Spa
|
Circuit de Spa-Francorchamps | 6 May |
| 6 | Targa Florio
|
Circuito Piccolo delle Madonie | 13 May |
| 7 |  ADAC 1000km Nürburgring
|
Nürburgring | 27 May |
| 8 | 24 Hours of Le Mans
|
Circuit de la Sarthe | 9 June 10 June |
| 9 |  Austrian 1000km†
|
Österreichring | 24 June |
| 10 | Watkins Glen 6 Hours
|
Watkins Glen International | 21 July |
† - No GT entries were received for the Österreichring event which was held only two weeks after Le Mans. The Buenos Aires 1000 km, scheduled to be held on 21 October,[4] was cancelled six weeks after the running of the Watkins Glen 6 Hours.[5]
