or "PRETEND DAY" or "DRESS AS YOUR HERO DAY" or whatever you call it!
Some fun links for you: (these are NSFC "not safe for children" — be ye warned!)
A Halloween (Cartoon) History
5 Candy Myths Debunked
True Halloween Horror Stories from Space
Spooky Science Mysteries
Patenting Death Inventions & Machines
Inventors Killed by Their Own Inventions