Welcome to planDisney, Vanessa! We're here to make sure your vacation is practically perfect in every way!
I'm glad you reached out well in advance of your trip. At this time, there is no way to modify your theme park reservations. However, you can cancel your existing
Theme Park Reservations and then rebook your new dates through the
Disneyland app (or Disneyland website). First, however, check on the availability of reservations for your desired days and/or park by going to the
Theme Park Reservation Availability Calendar. As of this writing, the month of May has lots of openings.
Starting humming Baroque Hoedown because, by the time of your trip, the beloved
Main Street Electrical Parade will have returned to
Disneyland Park; I highly suggest including it in your plans, along with the Disneyland Forever fireworks!
I hope you have a Supercalifragilisticexpialidocious time, Vanessa! If there's anything else we can do for you, please write back.
Eean