Time in Tennessee
Time in Tennessee, as in all U.S. states, is regulated by the United [States Department of Transportation].
65 of the 95 counties in the state of Tennessee, comprising about 73 percent of its total area, lie in the Central Time Zone. This encompasses the entirety of the western and middle grand divisions plus three counties in East Tennessee, while the remaining 30 counties lie in the Eastern Time Zone.
All counties observe Daylight Saving Time.