Raise your glass for the return of Oktoberfest, presented by Miller Lite, taking place September 26-28, 2025 on the Dayton Art Institute museum grounds. A Dayton tradition established in 1971, DAI’s Oktoberfest is southwest Ohio’s longest-running Oktoberfest celebration and the museum’s largest annual fundraiser. Money raised by Oktoberfest helps support everything we do at the Dayton Art Institute.