Statehouse News Bureau A display of fireworks sits on store shelves in central Ohio. Although it is legal to buy fireworks in Ohio, it remains illegal to set them off now that Gov. Mike DeWine has vetoed a bill that would've allowed fireworks to be set off on certain holidays throughout the year. Gov. Mike DeWine has vetoed a bill that was passed by a large majority of legislators that would have allowed Ohioans to set off the big fireworks they can legally purchase here in Ohio. The bill would have allowed Ohioans who now must promise to take fireworks out of state to set them off on about two-weeks-worth of holidays throughout the year. But Republican Sen. Michael Rulli (R-Salem) says there were two big restrictions.