they usually release about 3 months before For August. Do not go by last year as they closed at 9pm i9n july/Aug. their times are usually about 10pm, but after or around 14th Aug their times usually change to shorter hours.
You should also be aware that not all of the attractions open at 9am.
ET, Woody Woodpecker, Curious George and Barney are all usually about 10, though in my experience the latter opens "anytime they feel like it".
Jaws and Disaster are often open late too, 11am we found this Easter!