Hi Kristina,
Congratulations on booking your first Walt Disney World Resort Vacation, I'm sure you are going to have a magical time! I love early morning appointments and dining reservations at Magic Kingdom Park, I find it is a great way to get the most out of your day in the theme park. Another perk is because you are in the Magic Kingdom so early, your photos in front of Cinderella Castle will not have anyone in the background!
You have two options in order to figure out the best time to book your appointment. First off,
Theme Park hours are released approximately 6 months in advance, so you should be able to look up the hours for The Magic Kingdom roughly around the same time you will be able to begin making your Advanced Dining Reservations as well as you appointment for the
Bibbidi Bobbidi Boutique.
Your second option would be when you call to book your appointment, simply tell the Cast Member you are speaking with that you would like a reservation prior to the theme park opening. They will be able to look up the theme park hours for that day and schedule your appointment accordingly. To book your appointment please call (407) 939-7895 beginning 180 days prior to your arrival. I would definitely recommend booking this experience early, as it is very popular.
I hope you have a wonderful time on your first Walt Disney World Resort Vacation Kristina. Please let me know if you have any other questions as you continue to plan, I would be happy to help!
Stephanie