Hi Adrian, welcome to planDisney!
GOOD NEWS! You can absolutely change your reservation dates, but this will depend on a few factors.
First, your
theme park tickets but not be expired. To check your ticket's expiration date, load up your
Disneyland Mobile App, click the three horizontal lines in the bottom right-hand corner and select “Tickets and Passes”. You should see your tickets along with their expiration dates.
Next, take a look at the
Theme Park Reservation Availability Calendar to ensure there is availability at the date and park you wish to visit. Reservations can typically be booked up to 120 days in advance, so if your desired date is past the 120-day mark, you'll need to wait until you're within the booking window.
If all looks good, go ahead and cancel your current reservation by logging in to your
Disneyland Resort account, selecting the "My Disneyland" link, and then clicking the "Ticket and Reservation Details" link. Select the reservation you wish to cancel and click "Cancel Reservation". Once canceled, you’re free to book your new reservation!
If you have any other questions, please visit us again!
See ya real soon!
Jin