Here we are...
Magic Kingdom will have a 4th of July show on July 3rd and 4th at 9pm. That means you should go to MK on the 3rd if you have the chance.
Epcot will have Reflections of Earth with a special 4th of July Finale at 10pm on July 4th.
The Disney-MGM Studios will hold a special 4th of July show at 9pm on July 4th.
Just an FYI... Wishes will NOT be presented on the 3rd and 4th of July, contrary to whatever the operating schedules say.
And no, the Disney-MGM Studios show is not "Sorcery in the Sky."