Hi there Morgan! Welcome to 
planDisney. Thanks for sending your question to us, and I'd be happy to assist you with your tickets. 
2020 was quite a year, wasn't it? It felt like it was conjured up by the Disney Villains, and I'm glad that our heroes have stepped in and started to bring some normalcy back into our lives. For my family, our Disney vacations have been more important lately than ever, and I'm so glad you were able to reschedule your stay. 
To modify the date of your tickets, you'll need to use the web version of 
My Disney Experience. Once you're in your account, click on "My Plans" and then "Tickets & Memory Maker." Find the tickets you would like to change and select the "Modify" option on the right. From here you will be able to choose a new start date for your tickets and pay any increases in price that may result from the new date. Should you encounter any problems, 
give the friendly folks at Disney a call at (407) 566-4985. 
I hope this works out for you, Morgan. Don't forget to make those 
Disney Park Pass reservations for your new dates as soon as possible. October is going to be an incredible month to visit the Most Magical Place on Earth, as the 
50th-anniversary celebration will just be getting underway. Be sure to follow the 
Disney Parks Blog and check out 
planDisney on social media for news and in the park updates. From the opening of 
Remy's Ratatouille Adventure in 
EPCOT to special anniversary events, we'll be covering it all, and you won't want to miss it. Thanks again for coming to see us, and have a great, big, beautiful tomorrow!
Betsy