Hi Dan,
Thanks for bringing your question to planDisney! We're always happy to offer suggestions based on our own Disney vacations as a way to help you plan your visit.
It's great to hear you have theme park tickets and theme park reservations for your visit to
Disneyland Resort.
One helpful note to keep in mind is that the theme park reservations you make through the
Theme Park Reservations system can't be modified. There isn't a feature in the reservation system to modify a reservation to change its date. If you find a need to modify a reservation, you could cancel your theme park reservation through the
"My Theme Park Reservations" feature in your Disney account, and then make a new reservation with the Theme Park Reservations system. It's always a good idea to
check out the Theme Park Reservation Availability calendar to see if the theme parks have reservations available for the dates you wish to visit.
I am wondering, Dan, if the reason the web page would not let you reserve a different date to visit the theme parks is because you already had an existing theme park reservation that you had not yet cancelled.
Dan, I'm hopeful that you get all your theme park reservations set up so that you can enjoy all the magic of the Disneyland Resort theme parks.
Here's wishing you a wonderful stay at Disneyland Resort!
Jerry