In general, that is?
I worked there in the 1980s; seems to me that 3 to 6 weeks was the norm. There were always exceptions, though.
These days it seems as though hosts almost always appear a week before they have a movie opening, so I wouldn’t be surprised if everything was arranged much farther in advance now.
Depending on their consumption of controlled substances, some of them are VERY far out, man.
We’re watching the first season on DVD.
Wonder how thy found some of the " new comedy " acts…