Greetings Laura!
A very warm welcome to planDisney! Thanks for dropping by with a question!
First, please accept my sincere condolences. Second, please don’t worry! It’s so easy for you to adjust your dates and take your magical vacation to the
Disneyland Resort when the time is right for you! To modify your
Theme Park Reservation, please log in to your Disneyland Account select "My Disneyland" then click "Ticket and Reservation Details" and select "Cancel Reservation." After you receive the confirmation of cancellation, you’ll be able to book a brand new theme park reservation for your desired date. Theme Park Reservations are limited and subject to availability. Before you attempt to change your reservation, I recommend checking the
Availability Calendar to make sure your desired date and theme park are accepting reservations for your ticket type.
Unused single-day tickets and wholly unused multi-day tickets are valid for a future visit through the end of the stated expiration date. This date can usually be found on the back of the ticket. If you are unable to use the ticket before the printed expiration date, you may apply the value towards the purchase of a new theme park admission ticket at the current price.
I hope this answers your question. Enjoy your vacation to “The Happiest Place on Earth!” whenever you're able to visit.
Tiffanie