halloween

The eve of All Hallows' Day; October 31st; celebrated (mostly in English-speaking countries) by children going door-to-door in costume and soliciting candy with menaces.

They all get dressed up in scary costumes at Halloween.

1987, Kai Hansen, "Halloween", Helloween, Keeper Of The Seven Keys: Part 1. Black is the night full of fright / You'll be missing the day / What will be here very soon / Changing your way / A knock at your door / It is real or is it a dream / On trembling legs you open the door / And you scream... on Halloween