Tennessee uses Central Time (UTC-5). The state observes daylight saving time, shifting clocks forward by one hour from March to November.
| State | Tennessee (TN) |
| Time Zone | Central Time |
| IANA ID | America/Chicago |
| Current Offset | UTC-5 |
| Abbreviation | CDT |
| DST | Active — observing daylight saving time |
Eastern Tennessee (Knoxville, Chattanooga) uses Eastern Time.