This is actually one of the original purposes of Halloween.
Halloween, like Mardi Gras, descends from the inversion festival. Inversion festivals were a necessary part of most highly regimented and class-divided ancient cultures, such as Rome. You spent all year keeping rigidly to your class and policing others to do the same, living a life of very public behaviors, worshipping very specifically and obeying societal laws you may not agree with and which may not be to your benefit.
But ah, then the festival time came. The rules were thrown out. Sometimes the classes were literally inverted and the nobility were forced to serve. Nothing was taboo. The macabre, the ugly, the things that violated all laws of polite society were glorified. For a period of time – often longer in proportion to how regimented your society was – you were free to do and be exactly what you wanted. You could wear a costume. You could hide from the world behind a mask. You could make all the noise you wanted and nobody would stop you because it was driving out the evil in the community (the evil often being the stress of living in a very outward-facing, regimented society).
And America, whatever anyone says, is an incredibly regimented and class-oriented society. So our lead-in to Halloween is two months long.
Halloween is one of America’s only true inversion festivals. Christmas has terribly rigid expectations and heaps of stress, Thanksgiving makes you want to kill your whole family, the fourth of July it’s too fuckin’ hot, St. Patrick’s Day is too short and it’s filled with douchebags. Memorial Day is for mourning, Labor Day you’re about to start school again. Mardi Gras is a great, very historic inversion festival, but it’s also fairly localized. Pride comes close, and is a very badly needed form of inversion festival for its participants, but it’s not universal and it also involves aspects of activism and protest which use inversion but are not part of inversion.
Halloween is it. It’s our national cut-loose party. And that’s not accidental. Halloween has been an inversion festival since before it had that name, since ancient people realized the harvest was over, the dark short days were coming, and everyone was gonna have to spend the next four months indoors trying not to murder one another.