When it comes to Manufacturing Day, Ohio means business. At last check, the Buckeye State led the nation with an impressive 151 MFG Day events. The OMA encourages manufacturers to open their doors to students, parents, teachers, and community leaders. Then promote your event! There’s still time to register your company as a host. While MFG Day is officially Oct. 4, you can schedule an event on any day that best fits your schedule. 9/12/2019