Hi David and welcome to
planDisney!
You can absolutely change existing
theme park reservations for Disneyland Resort theme parks. To get the process started, log into your account on the
Disneyland website. On the Reservations page, choose the blue link that says, "View My Park Reservations," and click cancel. You can then make a new theme park reservation by following the instructions under "If You've Already Purchased a Ticket" on the Reservations page.
Before you cancel, check the
availability calendar to make sure the new dates you have in mind are available. If you have purchased a one-day ticket, make sure your new date is in the same or a lower tier. If it is not the same tier, you will need to upgrade your ticket tier by calling a Cast Member with Ticket Services at (714) 781-4636.
David, I hope this information is helpful. Please feel free to come back to see us if you have any more questions. It's always our pleasure to help you with all the details of your next
magical vacation!
Veronica