I just looked the other day and I am sure I saw the river that divides Bama and Jawja being the Eastern/Central line as well, with it flowing into FL Panhandle. That is the state that has the Eastern/Central divider
I think Kentucky is also between two time zones....but Georgia is COMPLETELY in the eastern time zone...I lived there for 5 years. Our son graduated from Auburn University. The central time zone begins after you cross the Chattahoochee river into Alabama.