Do I have to book a date for my SeaWorld and Aquatica 2-Visit Ticket + Eat Free?

No, you will be sent an open-dated SeaWorld and Aquatica 2-Visit Ticket. Tickets are valid for use during the calendar year selected at the time of purchase and activated the first time you visit either SeaWorld Orlando or Busch Gardens Tampa Bay. The ticket expires 14 days after first use and both park visits must be taken within this 14 day validity window.