Central Time Zone: States, Cities, and Key Facts
Chicago sits at UTC−6 in January and UTC−5 in July. That one-hour swing, repeated every year across 1,500 miles of the American midsection, determines when 689,545 people in Washington D.C. can reach a trader in the Chicago pits or a supplier in Dallas. Central Time is the country's workhorse zone: nine states live entirely inside it, another eleven split the difference with Eastern, Mountain, or Pacific.
The zone that runs from the Great Lakes to the Rio Grande
Central Time covers more ground than any other US zone. When clocks show noon in Chicago, it is 1 PM in Washington, 11 AM in Denver, and 10 AM in Los Angeles. The zone carries two labels: CST (Central Standard Time) in the cold months and CDT (Central Daylight Time) when the days stretch long. The generic shorthand "CT" covers both.
Nine states fully inside Central Time
Alabama, Arkansas, Illinois, Iowa, Louisiana, Minnesota, Mississippi, Missouri, and Wisconsin. Every county, every city hall clock, every school bell.
Eleven states that straddle the line
| State | Central portion |
|---|---|
| Florida | Panhandle west of the Apalachicola River |
| Indiana | Northwestern and southwestern corners |
| Kansas | Most of the state (western counties use Mountain) |
| Kentucky | Western half |
| Michigan | Upper Peninsula western counties |
| Nebraska | Eastern two-thirds |
| North Dakota | Eastern three-quarters |
| Oklahoma | Most of the state (the panhandle is Mountain) |
| South Dakota | Eastern half |
| Tennessee | Western and middle sections |
| Texas | Most of the state (far west, including El Paso, uses Mountain) |
Cities that run on Chicago's clock
Chicago anchors the zone. Houston, Dallas, San Antonio, and Austin form the Texas contingent. Nashville, Memphis, New Orleans, St. Louis, Kansas City, Minneapolis, and Milwaukee fill out the map. Mexico City and Winnipeg sit on Central Time too, though Mexico ended DST nationally in October 2022. Only the Baja California border region still follows the US DST schedule.
When CST becomes CDT
The switch happens twice a year, same as every other US zone that observes DST. On the second Sunday in March, clocks jump forward at 2:00 AM local time. On the first Sunday in November, they fall back. During CDT, Central Time aligns with Eastern Standard Time: 3 PM in Chicago in July is 3 PM in Washington. In January, that same Chicago clock reads 2 PM when Washington shows 3 PM.
Why TV promos say "8/7 Central"
Network prime time runs 8 PM Eastern and 7 PM Central, live, in the same moment. Mountain and Pacific viewers get a separate feed three hours later. The notation is not a time zone fact. It is a scheduling shorthand from the early network era that stuck. Live events like the Super Bowl start around 6:30 PM Eastern, which puts kickoff at 5:30 PM Central.
UTC offsets at a glance
| Period | Abbreviation | UTC Offset | Example (Chicago) |
|---|---|---|---|
| Early November to mid-March | CST | UTC−6 | 12:00 PM |
| Mid-March to early November | CDT | UTC−5 | 1:00 PM |