Hi, Cora! Cinderella's Royal Table is one of the most sought after dining experiences, so you absolutely want to book this meal at exactly 180 days in advance.
The best advice I can give you is to book early. You can start checking online dining reservations at about 6:00 AM on your 180th day in advance, so you can check there to see if there are tables available. You'll find online reservations available by clicking
Disney Dining Reservations.
Alternatively, you can call, but call early! Reservations cast members are available at 7:00 AM, and I would be on the phone right at 7:00. That will help you secure the day and time you want.
If you are a Walt Disney World resort guest, you can book 180 days in advance for up to 10 days, so if the first day of your vacation is February 1st, you can call 180 days in advance and book through February 10th. That's a great benefit!
Have a wonderful time planning this magical vacation!