Hey there, Danny!
I'm so happy to welcome you to planDisney, and I truly appreciate you stopping by to share your question with us! How exciting that you're thinking of becoming a Walt Disney World 
Annual Passholder...that's absolutely wonderful news! You're about to unlock a whole year of magic, memories, and pixie-dusted adventures. And I have to say, choosing to start your passholder journey around 
Christmastime couldn't be more perfect. Honestly, what could be a better gift to give yourself? It's pure holiday magic! 
I just took a look at the 
Annual Passholder theme park reservation calendar, and here's some exciting news...Christmas Day is currently available for reservations! WOOHOO!! This availability applies to the Incredi-Pass, since all other Annual Pass options are blocked out during that busy holiday period. 
Once you scan into your first theme park of the day, you're also welcome to park hop to another park at any given time, giving you even more flexibility to enjoy the magic. Of course, all of this is subject to capacity limits, but it's a great start for planning your festive holiday in the parks!
Danny, I hope this information helps and gets you even more excited for what's sure to be the most magical year ever as a Walt Disney World Annual Passholder! If any other questions come up along the way, you're always welcome here back at planDisney...we're happy to help make your magic happen!
See ya real soon,
Kami