They start at Dusk, last July that was around 8:30-9:00pm.
showed last year when we where there, Ice Age-Shrek, DD loved it even though she has watched them 100s of times.
Beside where you get the pool towels, they have a board with whats happening at the pool that day , and if it is movie night, the name of the movie.
Do not forget you can go to the other pools as well.