CDT time now |
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14:11:44 Sun, 6 Jul 2025
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| UTC Offset: UTC -5 |
Central Daylight Time (CDT) operates at UTC−5 and is the daylight saving time observed in the Central Time Zone during the summer months. Sometimes simply referred to as "Central Time," CDT shifts clocks one hour forward from Central Standard Time (CST, UTC−6) to extend evening daylight. CDT is used across much of the central United States, parts of central Canada, and portions of northern Mexico.
Importance and Global Use of CDT
CDT helps maximize daylight hours in the summer, benefiting social activities, tourism, and local businesses by extending evening daylight. This adjustment is important for industries such as construction, agriculture, and retail, as well as for community events, which all gain from longer daylight hours after standard working times.
On an international level, CDT supports smoother coordination across North America, Latin America, and global partners by maintaining a predictable daylight saving schedule. This facilitates real-time communications, trade operations, and transportation links, allowing international businesses and supply chains to align more easily with Central Time Zone regions during the summer.
Where and When CDT is used worldwide
North America
US states using CDT during summer and CST during winter:
- Alabama - all except Phenix City InfoPhenix City uses EST/EDT time zone.
- Arkansas
- Florida - northwestern counties InfoNorthwestern counties: Bay, Calhoun, Escambia, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, Washington, and northern part of Gulf county.
- Illinois
- Indiana - 12 counties only InfoNorthwestern counties near Chicago (Jasper, Lake, LaPorte, Newton, Porter, and Starke) and southwestern counties near Evansville (Gibson, Perry, Posey, Spencer, Vanderburgh, and Warrick).
- Iowa
- Kansas - all except few western counties InfoGreeley, Hamilton, Sherman and Wallace uses MST/MDT time zone.
- Kentucky - western half counties InfoWestern half counties are: Adair, Allen, Ballard, Barren, Breckinridge, Butler, Caldwell, Calloway, Carlisle, Christian, Clinton, Crittenden, Cumberland, Daviess, Edmonson, Fulton, Graves, Grayson, Green, Hancock, Hart, Henderson, Hickman, Hopkins, Livingston, Logan, Lyon, McCracken, McLean, Marshall, Metcalfe, Monroe, Muhlenberg, Ohio, Russell, Simpson, Todd, Trigg, Union, Warren, and Webster.
- Louisiana
- Michigan - few western counties onlyInfoDickinson, Gogebic, Iron, and Menominee
- Minnesota
- Mississippi
- Missouri
- Nebraska - eastern counties InfoAll except Arthur, Banner, Box Butte, Chase, Cherry (west part), Cheyenne, Dawes, Deuel, Dundy, Garden, Grant, Hooker, Keith, Kimball, Morrill, Perkins, Scotts Bluff, Sheridan, and Sioux counties of Nebraska use MST/MDT time zones.
- North Dakota - most of the state InfoAll except Adams, Billings, Bowman, Dunn (most), Golden Valley, Grant, Hettinger, McKenzie (south part), Mercer, Morton (most), Sioux (most), Slope, and Stark counties of North Dakota follow MST/MDT time zones.
- Oklahoma
- South Dakota - most of the state InfoAll except Bennett, Butte, Corson, Custer, Dewey, Fall River, Haakon, Harding, Jackson, Jones (west part), Lawrence, Meade, Mellette, Pennington, Perkins, Shannon, Stanley (west part), Todd, and Ziebach counties of South Dakota follow MST/MDT time zones.
- Tennessee - central and western counties InfoCentral and Western counties are: Bedford, Benton, Bledsoe, Cannon, Carroll, Cheatham, Chester, Clay, Coffee, Crockett, Cumberland, Davidson, Decatur, DeKalb, Dickson, Dyer, Fayette, Fentress, Franklin, Gibson, Giles, Grundy, Hardeman, Hardin, Haywood, Henderson, Henry, Hickman, Houston, Humphreys, Jackson, Lake, Lauderdale, Lawrence, Lewis, Lincoln, McNairy, Macon, Madison, Marion, Marshall, Maury, Montgomery, Moore, Obion, Overton, Perry, Pickett, Putnam, Robertson, Rutherford, Sequatchie, Shelby, Smith, Stewart, Sumner, Tipton, Trousdale, Van Buren, Warren, Wayne, Weakley, White, Williamson, and Wilson.
- Texas - most of the state InfoAll except El Paso, Hudspeth, and most part of Culberson counties of Texas follow MST/MDT time zones.
- Wisconsin
Canadian provinces and territories using CDT during summer and CST during winter:
- Manitoba
- Nunavut - between 85° West and 102° West, (Resolute, Repulse Bay, Baker Lake, west shore of Hudson Bay), except on Southampton Island.InfoSouthampton Island (Coral Harbour) observe EST all year.
- Ontario - most part of west of 90° West and Big Trout Lake area in east of 90° West Infowest of 90° West: Atikokan area and New Osnaburgh / Pickle Lake area observe EST all year. Shebandowan and Upsala areas observe EST/EDT time zone.
- Saskatchewan - Creighton and surrounding area only
Mexican states using CDT during summer and CST during winter:
- Chihuahua - northeast border area only InfoNorthwest border area observe MST/MDT time zone and rest of the state observe CST all year.
- Coahuila - north border area only InfoRest of Coahuila observe CST all year.
- Nuevo León - north border area only InfoRest of Nuevo León observe CST all year.
- Tamaulipas - north border area only InfoRest of Tamaulipas observe CST all year.
Other Time Zones in UTC -5
Other time zones share the same offset as Central Daylight Time (CDT), but are known by different names. While their clocks align, they may represent different regions or countries based on local time zone definitions.
- Acre Time – ACT
- Colombia Time – COT
- Cuba Standard Time – CST
- Easter Island Summer Time – EASST
- Ecuador Time – ECT
- Eastern Standard Time – EST
- Peru Time – PET