Native Americans began receiving special emphasis in 1987 when the National Park began its first "Native American Indian Day" on September 26. Paralleling Ohio’s Native American Recognition Day, Mound City Group provided temporary exhibits and invited Indian volunteers for special talks. In connection with the National Park Service’s seventy-fifth anniversary, the park sponsored the "Hopewell Spirit Art Contest," awarding prizes to the best renditions of Hopewell culture.
The fourth Saturday in September shall be designated as "Native American Indian Day." - (Ohio Revised Code. GENERAL PROVISIONS. Chapter 5: STATE INSIGNIA; SEALS; HOLIDAYS: 5.223 Native American Indian day. Effective Date: 09-24-1987)
In 2017 Native American Indian Day in Ohio in USA falls on September 23.