Hi Mary,
Disney has not announced the 2011
Mickey's Not-So-Scary Halloween Party (MNSSHP) dates yet nor when they will go on-sale. The
2010 dates began on Sept 14, 2010 so one would
guess (I don't know for sure) that the dates will begin mid-Sept this year as well. The Disney Parks Blog announced the 2010 MNSSHP &
Mickey's Very Merry Christmas Party dates on May 21, 2010. Hopefully we'll find out around that time this year too if not sooner.
Keep an eye on the
Disney Parks Blog regarding the official dates as they usually make announcements there. If you're on twitter, follow @DisneyParks & @WaltDisneyWorld. If you're on Facebook, keep an eye on the official
Disney World Facebook page. You're also welcome to check back with us in a few weeks.
Wishing you many magical memories :-) Allison