Creventic yesterday announced a "new" calendar for 2020 which is in fact the existing calendar but with COTA 24H replaced with a Zandvoort 12H.
The Dutch North Sea coast in mid-November wouldn't be my first choice of spectator trip, much as I would like to see Zandvoort.
The calendar still has Portimao 24H in mid-June and Monza 10-11 July. Frankly I reckon anyone who thinks those two events will go ahead, even behind closed doors, has been smoking too much home-grown pipeweed, but I'd love to be proven wrong.
https://creventic.com/races