Hey there, hi there, Dominique! Welcome to planDisney. You've brought us a great question and I'd be happy to help get you an answer.
Oh boy! I'm sorry to hear that you have accidentally made a theme park ticket reservation for the wrong day. This is an easy mistake to make and luckily an easy one to fix as well. What you can do is go into your Disney account and cancel those reservations and then make new theme park ticket reservations for the date you need. I'd be happy to walk you through the steps to do this.
I suggest downloading the
Disneyland app on your phone if you haven't already. Once you have downloaded the app, open it, and click on the three horizontal lines at the bottom right corner. Then you can select "Future Plans". If you are logged into your Disney account, you should see your current reservations here for your tickets. Click on the reservation and it should take you to a webpage. If you scroll down, you should see "Upcoming Theme Park Reservations". Then under the date you accidentally chose, you can see a "Cancel Reservation" option. Click on that and it will walk you through the steps to select which tickets for that date you want to cancel and cancel the reservation.
Once you've canceled, you can go back into the app and click on the "+" in the middle of the menu bar at the bottom of the app and select "Make a Park Reservation". On this screen, you will click on "Make Park Reservations" and then "Book Theme Park Reservations" on the next page. This should get you to the point where you will now select the tickets on your account that you want to make the reservation for and then select your date and park.
It looks like you are set to arrive during
Halloween time, which is such a fun time at Disneyland Resort. Your favorite characters will be donning their best costumes and there are usually spooky and delightful limited-time treats around the park to enjoy as well.
Dominique, I hope you get your reservations switched easily and have a magical time visiting Disneyland Resort.
Carrie