Families can celebrate Mickey's Not-So-Scary Halloween Party at Walt Disney World earlier than ever this year . . . and we're definitely okay with that. The start of the Halloween season at the parks brings one of our favorite events of the year, Mickey's Not-So-Scary Halloween Party, which runs from August 16 through November 1. If you and your family are planning on attending one of the event nights at Magic Kingdom, keep reading. We've rounded up everything you need to know about going to Mickey's Not-So-Scary Halloween Party this year, including a few new additions! So gather up your little ghosts and goblins for some Halloween fun at Walt Disney World.