I wrote to Disney also. Response is below:
Dear Adam,
Thank you for contacting the Walt Disney World® Resort.
I apologize, nothing official has been reported at this time as to why Magic Kingdom Park plans to close at 7 PM on those nights.
In order to assure the most timely and up-to-date Theme Park schedule information, while on
www.disneyworld.com select PARKS from the Home Page, then, PARK HOURS. Enter the date you will be visiting. You will be able to see all Theme Park hours, as well as, Extra Magic Hours.
Dates for 2015 Mickey’s Not-So-Scary Halloween Party are:
Sept. 15, 18, 20, 22, 25, 27
Oct. 1, 2, 4, 6, 8, 9, 12, 13, 15, 16, 18, 20, 22, 23, 25, 27, 29, 31
Nov. 1
Have a magical day!
If you have questions or need further assistance, feel free to contact us.
Sincerely,
Autumn Adams
eCommerce Sales and Service Team
PLEASE NOTE: All information is subject to change without notice and should be confirmed just prior to your visit.