Hi John,
Welcome to planDisney and thank you for reaching out to us with your question about Theme Park Reservations. I am so happy to see that you are visiting Walt Disney World Resort this fall, I am sure you are going to have a magical time!
At this time, guests aren't able to modify Theme Park Reservations using the
Disney Park Pass system, however if you would like to switch your Theme Parks, you can do this by canceling your existing Reservation and making a new one. Prior to canceling, I do recommend checking the
Theme Park Reservation Availability Calendar to see if your desired Theme Park is available, because once you cancel your existing reservation, you may not be able to get it back.
In order to cancel your existing Theme Park Reservation login to
My Disney Experience and scroll down to "My Plans". From there find your Theme Park Reservation and click on "View Details" and finally, "Cancel Reservation". Once your reservation is canceled, you will be able to make a new Theme Park Reservation in My Disney Experience under "My Plans" and then "Park Reservations".
I hope this information was useful and you are able to successfully switch your days around. If you have any other questions please come back to
planDisney, we are always happy to help.
~Stephanie