Hello, Katie!
Welcome to planDisney! I'm glad to share that March is a fantastic month to visit the
Disneyland Resort. The weather is so amazing that I'm already a little jealous!
You will be able to make this change at the Disneyland Resort at the ticket booths right outside of Disneyland Park and Disney California Adventure Park.
But the best way to make changes to your theme park tickets before your trip is to
call the Cast Members at (714) 781-4636. They will be able to discuss any changes with you, and help you make the best choices for your upcoming trip!
Since you're using Park Hopper Tickets, don't forget to visit
both Cars Land and
Star Wars: Galaxy's Edge at night. They're both breathtaking after the sun sets, and their unique lighting will be perfect for you to pose for some fantastic photos!
I hope this helps you, Katie! If you have more questions, please let us know!
May the magic be with you,
Julie