Hiya, Ashley! Thanks for sharing your question, and welcome to planDisney! 
New Year’s Day may seem a ways away, but reservations will begin to fill up quickly, so time is of the essence. Let’s jump in and look at your options. 
For California Grill and its special New Year’s Eve dining event, call 407-824-2284 to book your reservation. In the case of most other dining reservations, they can be booked online or through the My Disney Experience mobile app
 60 days in advance of your arrival date, and for your entire length of stay (up to 10 days) if you’re staying at a Walt Disney World Resort hotel. 60 days from the day I’m writing this is January 1, 2026, so you’ll need to act fast to get the dining reservations you want.
The celebration at California Grill sounds like an amazing way to ring in the new year. A 4-course meal, live music,  characters, and of course, a stunning view of the fireworks above the Magic Kingdom. You can find an overview of the festivities and menu information 
here (spoiler: it all sounds delicious). I hope you’re able to get a reservation and ring in the new year in style! 
I hope this info is helpful, Ashley! Pop right back if you have any other questions or need recommendations for alternate ways to celebrate New Year's Eve at Walt Disney World. Your planDisney pals are here to help! 
Magical travels! 
Matt