Hey there, hi there, ho there! You're as welcome as can be here at planDisney, Jordan! Thanks for stopping by.
You've asked a great question. Unfortunately,
Magic Key holders cannot give their reservations to another guest. Each theme park admission ticket type has its own inventory/allotment of park reservations. 1-Park tickets, Park Hopper tickets, and Magic Key passes have their own park reservations inventory. Once the admission type reaches its maximum allotment, park reservations and tickets will not be available for that specific date.
It does seem like availability for December is quite limited. However, the
Theme Park Reservation Availability calendar updates in live time, so you'll frequently find availability due to cancellations. If you plan to visit Disneyland Resort tomorrow, you may have difficulty. However, if you decide to splurge and stay at a
Disneyland Resort Hotel, you'll have better luck!
I HO HO HOPE you get to experience the magic of the
Holiday Season at The Happiest Place on Earth, Jordan!
Eean