The 2021 schedule is out. The most interesting thing is that Laguna Seca is back and will happen a week after Long Beach. The rest is kind of what you'd expect. (Link
here to S365 story.)
Jan. 22-24 – Roar Before Rolex 24 (DPi, LMP2, LMP3, GTLM, GTD)
Jan. 28-31 — Rolex 24 at Daytona (DPi, LMP2*, LMP3*, GTLM, GTD)
March 17-20 — Mobil 1 Twelve Hours of Sebring (DPi, LMP2, LMP3, GTLM, GTD)
April 16-17 — Long Beach (DPi, GTLM, GTD)
April 23-25 — WeatherTech Raceway Laguna Seca (DPi, LMP2, GTLM, GTD)
May 14-16 — Mid-Ohio Sports Car Course (DPi, LMP3, GTD)
TBA — Detroit Belle Isle (DPi, LMP2, GTD**)
June 24-27 — Sahlen’s Six Hours of The Glen (DPi, LMP2, LMP3, GTLM, GTD)
July 2-4 — Canadian Tire Motorsport Park (DPi, LMP3, GTLM, GTD**)
July 16-17 — Lime Rock Park (GTLM, GTD)
Aug. 6-8 — Road America (DPi, LMP2, LMP3, GTLM, GTD)
Aug. 20-22 — Virginia International Raceway (GTLM, GTD)
Oct. 6-9 — Motul Petit Le Mans (DPi, LMP2, LMP3, GTLM, GTD)
*LMP2, LMP3 races not counting for season-long points
**IMSA WeatherTech Sprint Cup only