In America (and elsewhere?) we have a tradition of trick-or-treating where on Halloween or the night before kids go around the neighborhood in a costume, knock on doors, and get candy. It’s a lot of fun.
But I was well into adulthood before I learned that not all places have kids tell jokes before they get candy. Apparently it’s only the city I grew up in that they do that! Not even neighboring cities do it.
When i was a kid, cities would designate trick or treating nights - usually the Friday or Saturday before or after Halloween. It was nice because you could hit a couple of different cities on different nights.