Hey there Sam,
Welcome to planDisney and thanks so much for your question! I always love the chance to answer a question from a fellow Arizonan.
Currently,
theme park reservations can be made about 120 days out from the current date, so the reason you aren't able to make your reservations is simply because the days aren't available quite yet!
I like to check the
Theme Park Reservation Availability Calendar to see how far in advance theme park reservations are available. As of the time that I'm answering your question, the calendar shows availability through December 27, so you'll still want to wait two more days to be able to book through December 29.
The parks can get fairly busy during this week, but it really is a special time of year to visit. Just be sure to take it all in when you're there! You'll be able to experience all the
holiday magic so make sure to also keep an eye on the
Disney Parks Blog for an upcoming Foodie Guide that will cover all the delicious snacks and drinks during this season.
Thanks again for your question, Sam! I hope you have such a fun time visiting the Disneyland Resort this December.
Have a Magical Day,
Greg