Ohio hosted 187 MFG DAY events in 2016 and already in 2017 there are 80 events scheduled. (Michigan has 75.) MFG DAY 2017 is Friday, October 6 but events can be held at anytime. All registered Manufacturing Day event hosts will be automatically entered in a drawing to receive free audio tour headset rental packages, to facilitate factory tours on Manufacturing Day. Everything you need to plan your event is here. 8/23/2017