- Spanish Grand Prix
- Depailler wins as Laffite falters
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April 29, 1979: Patrick Depailler secured a start-to-finish victory for Ligier at the Spanish Grand Prix, but it was another day of frustration for his team-mate Jacques Laffite as his early season wins started to fade as reliability issues came to the fore
- United States Grand Prix West
- Villeneuve beats Scheckter again at Long Beach
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April 8, 1979: Gilles Villeneuve won the United States Grand Prix at Long Beach - his second successive victory and one which took him two points ahead of Jacques Lafitte in the drivers' championship - but it was a day of confusion and controversy