There was a John H. Day in the 1880 US Census in District 21 of Maury, TN at age 9.
He was a farm hand. His father was John Day, 30 yrs. old, born GA. His mother was Susan Day, 30 yrs. old, born TN. John H. Day had an 8 yr. old brother, C.C. Day, a 4 yr. old brother, Jas. F. Day, a 2 yr old sister, A.E. Day and a newborn sister, C.J. Day.
All the children were born in TN.