UFO Days is held annually the last weekend of July (since 1978). It celebrates a series of unexplained phenomenon and sightings in and around the town of Elmwood, Wisconsin that continues to this day.

The festivities start off on Thursday with a community wide garage sale, library book sale and other events in town. Things really get rolling on Friday evening with food, souvenir and beer stands opening at 6pm, an ugly truck contest, and a live band on Main Street.

Saturday is filled with bus tours to locations of sightings, guest speakers that provide information and insight, and multiple activities and events. Early in the day there is a 5k race, a car show, vendor faire, and tractor pulls. During the evening, Main street is closed for live music and enjoying a night under the stars. A parade is held on Sunday.