They add more days, not all of them on Friday anymore either. Basically you just have to watch their site. I’ve seen them add events anywhere from a few months in advance or two weeks in advance.
To add to Sleepers question. When I ran my civic there at most I usually peaked 105. Usually I tried to enter a bit less than that just to save my brakes. A few rare times I got close to 110 going into turn 10 (which I have a video of me following neonmike when just such a thing happened). I made it out ok I’ll say that much lol. I know GT1 Corvettes and some Formula cars are entering that same turn close to 140. But 120 in the Panoz is pretty good compared to most the stuff you’ll see up there.