Nothing quite signals the start of summer more than a Memorial Day weekend barbecue set to the sounds of engines roaring. Here’s a rundown of the biggest day in motorsports, Sunday, May 28: Formula 1 Monaco Grand Prix The Principality of Monaco is once again the site of Formula 1’s crown jewel, the Monaco Grand Prix, contested through the streets of fabulous Monte Carlo. Max Verstappen, Lewis Hamilton, Charles Leclerc, Sergio Pérez and other F1 stars compete in one of motorsports’ most prestigious and scenic events. Mexico’s Pérez claimed victory in last year’s shortened, rain-marred race. ABC has live coverage of the race Sunday beginning at 7:30a/6:30a c featuring the Sky Sports broadcast team. A race encore airs on ABC at 1:30/12:30c. Ntt IndyCar Series Indianapolis 500 The Greatest Spectacle in Racing, the Indianapolis 500, returns to famed Indianapolis Motor Speedway for its 107th running.