Originally announced on August 2, 2019, the IMSA schedule was revised as a result of the coronavirus pandemic with changes announced May 15, June 25, and August 1. At the time the 12 Hours of Sebring (March 21) postponement was announced March 12 because of the pandemic and the travel ban, the Long Beach (April 18), Detroit (May 30), and Mosport (July 5) races were officially cancelled by authorities and removed from the first revision on May 15. At that point, standard-distance races were added to Daytona (July 4) and Sebring (July 11). Mid-Ohio was moved from May 3 to September 27. The 6 Hours of Watkins Glen, originally scheduled June 28, was moved to October 4 in the first revision. Lime Rock (GTLM/GTD) was moved from July 18 to October 31. The Virginia International Raceway date was moved from Sunday to Saturday (August 22) in order to avoid a date clash with the 104th Indianapolis 500.