Hi Katie, welcome to planDisney!
How exciting that your magical Walt Disney World vacation begins tomorrow!! This truly is the most magical time of the year.
I checked the
Hours & Events Calendar for the entire week and you are correct, Magic Kingdom Park will be open until 11:00 pm tomorrow and if you didn't notice, it will be open until 10:00 pm on Wednesday. Magic Kingdom Park will close earlier on Tuesday, Thursday, and Friday to accommodate
Mickey's Very Merry Christmas Party, which begins at 7:00 pm (please note if you have tickets for the party, you can enter Magic Kingdom Park any time after 4:00 pm).
Katie, I hope you have time in your schedule to visit some of the resort hotels to enjoy their festive decorations. Many of the resorts have spectacular gingerbread displays that are truly a must-see! Here are my favorite resort hotels to visit:
Disney's Grand Floridian Resort & Spa
Disney's Contemporary Resort
Disney's Beach Club Resort
Disney's Yacht Club (new gingerbread display debuting this year)
Disney's BoardWalk Inn
Disney's Animal Kingdom Lodge
I hope you have the most magical holiday vacation at Walt Disney World!
Diane