Alas I won't be able to post my Halloween costume until tomorrow (too late for the Slytherin prompt), but I will share since it was lots of fun.
Yesterday we went straight from school to a friend's house for dinner. Then we headed over to see the Anti-morris (done at sun-down on Samhain in silence rather than sun-up on May Day with bells). Very fun! Then we skipped the mumming in favor of trick-or-treating. Hopefully soon in a year to come we will get to stay and watch the mumming plays though, since it looked really interesting.