Ohio Gov. John Kasich plans Friday to sign into law a proposal that designates the day - along with each March 30 - as Vietnam Veterans' Day in the state.
Supporters say the annual day is set aside to honor those who fought, died or are still unaccounted for in the Vietnam War.
The date to honor the veterans had been in flux as lawmakers wrestled with whether they should use March 29 like other states.
Some veterans had balked at that proposal, noting it's the anniversary of U.S. forces pulling out of Vietnam.
Among those supporting the March 30 designation is retired Air Force Col. Tom Moe, a Vietnam prisoner of war and director of the state's veterans services.
Moe is to attend the bill's signing.