The Halloween update in Animal Crossing: New Horizons gives you the option to do tricks or treats at the end of the month. The big event does not take place until October 31, but you have plenty of time to prepare for it. You want to make sure you visit Nook's Cranny every day to receive a candy to use during the main event. Also, when the event arrives, you don't want to be the weirdest and be sure to create a Halloween costume.
There is no specific item that says "Halloween Costume" Instead, you want to rely on your choice of creation from various outfits available in the Able Sisters store. Walk in and you can choose from a rotating selection of clothing, just as you would in any other season. Be sure to check back every day as the Able Sisters selection usually includes at least one item you can use for Halloween, like a hot dog costume or animal outfit. There are no limits to what can be considered a Halloween costume.
When the Halloween event in Animal Crossing: New Horizons takes place on October 31, from 17:00 p.m. to midnight, you can join in the festivities with the rest of your island residents. You hand out candies, accept them, and interact with everyone who lives there. Be sure to bring your costume to the event and don't be late.
