Hello Carla,
Thanks for stopping by planDisney with your question. Wow, it looks like you are planning a long visit to Walt Disney World - lucky you! If this is your first time or your twenty first time going to Mickey's Not-So-Scary Halloween Party, you are in for a treat. Seeing the characters dressed in their Halloween costumes, watching the
special parades and shows, and trick-or-treating through the park are just a few things that make this such a frightfully fun event.
I hope I understand your question correctly. It sounds like you have already purchased your
multi-day theme park tickets. I'm guessing you have 10 day tickets (the maximum length of ticket for U.S. residents), which means you can make 10
daily theme park reservations. One for each day you have a ticket.
If you didn't make a reservation for September 11 because you knew you would be headed to
Mickey's Not-So-Scary Halloween Party, that's okay. The party is a separate ticketed event, and you don't need to have a reservation to
Magic Kingdom for the day in order to attend. Your party ticket, in essence is your reservation. Even though the party doesn't officially start until 7:00 PM, you will be allowed into Magic Kingdom beginning at 4:00 PM, giving you time to enjoy a meal at a favorite restaurant inside the park or enjoy more attractions before your spooktacular evening begins!
Hope this helps. Enjoy planning your magical vacation!
Diane