Hello Lisa, the force is strong in bringing you to the Disney Parks Moms Panel with your question.
Visiting all four theme parks in one day will make you worthy of being received into the Jedi Order. It requires careful planning, lots of training, and patience. Guests with valid theme park admission can make up to 3 initial FastPass+ selections per day at least 30 days from their arrival. If you are a guest at a Walt Disney World Resort Hotel, you can make your selections up to 60 days in advance.
Unfortunately, you can only make your 3 initial
FastPass+ advance selections at only one theme park. Personally, I think the First Order is to blame for these restrictions. However, if the force is strong enough with you and FastPass+ are available in other theme parks that day. You can reserve a fourth FastPass+ experience after your initial selections have been used. This is where the patience of a Jedi will come in while visiting the other theme parks that day.
Keep in mind valid theme park admission with Park Hopper Option will be required to attempt this bold plan. No Jedi mind tricks can be used to enter another theme park if you do not have that option. Just like the Rebels, your plans are built on hope. I have been to all four theme parks in one day, but this was a long time ago, in a galaxy far, far away, before FastPass+ was in place. My journey began early in the morning at Disney's Animal Kingdom and ended at the Magic Kingdom. I hope that answers your question. If you happen to come across any plans for a new Death Star or you have more questions, please come back and visit us again.
May the Force be with you,
Andrea