Fireworks usually occur from 7/4 to the end of August. As for parades, there's the Marvel Super Hero parade at IOA. You can to see the Marvel super heroes ride on ATVs and other cars, and then they do a meet and greet. Sometimes USF has a parade of different movie stars, like Doc Brown and the Ghostbusters.
The major parades, however, occur during Mardi Gras and Halloween Horror Nights.