From the Six Flags Official Website:
https://www.sixflags.com/greatamerica/special-events/july-4th-fest
Exclusive Ride Time June 20 - July 4
Each day of our Coca-Cola July 4th Fest will kick off with exclusive ride time on some of our most popular attractions. On June 30-July 4, bring a can of any Coca-Cola product or our limited edition 4th Fest drink bottle, along with your park admission, Season Pass or Membership, and you'll get a special wristband to enter the park one hour early, from 9:30 a.m. to 10:30 a.m.
Ride schedule:
June 30: Mardi Gras Hangover, THE JOKER Free Fly Coaster, JUSTICE LEAGUE: Battle for Metropolis, Goliath, THE DARK KNIGHT Coaster, SUPERMAN: Ultimate Flight, Viper, Condor, & Whirligig
July 1: Mardi Gras Hangover, THE JOKER Free Fly Coaster, JUSTICE LEAGUE: Battle for Metropolis, Goliath, BATMAN The Ride, Giant Drop, Whizzer, Revolution, & Hometown Fun Machine
July 2: Mardi Gras Hangover, THE JOKER Free Fly Coaster, Goliath, X Flight, SUPERMAN: Ultimate Flight, Raging Bull, Demon, Richochet, & Fiddler's Fling
July 3: Mardi Gras Hangover, THE JOKER Free Fly Coaster, THE DARK KNIGHT Coaster, Vertical Velocity, BATMAN The Ride, Viper, Whizzer, The Lobster, & Triple Play
July 4: Mardi Gras Hangover, THE JOKER Free Fly Coaster, Goliath, SUPERMAN: Ultimate Flight, Raging Bull, BATMAN The Ride, Revolution, Hometown Fun Machine & Chubasco