What are the most busiest weekdays in Orlando themeparks??

[coastered]

What are the most busiest days in Orlando themeparks??

 

Because i want to visit Orlando in September, i'm already searching for information about themeparks, hotels and all the other stuff.

 

I would really like to know what days of the week could be the busiest in all the Orlando themeparks, and offcourse Busch Gardens.

Beacause I don't want to battle huge crowds.

 

On the website www.intercot.com I found a list with the busiest days at Walt Disney World, so I only need the busiest days at Universal Studios, Islands Of Adventure, SeaWorld and Busch Gardens

[Guest]

Any weekdays after labor day will most likely be dead at all parks. I dont know when HHN starts, but that event will be busy.