North American time zones:

CDT – Central Daylight Time

Time zone offset: UTC - 5 hours

Note that CDT is a daylight saving time/summer time zone. It is generally only used during the summer in the places listed below, during the winter CST is used instead

Time zone abbreviations: CDT, HAC

Email time zone indicator: -0500

An email sent from someone in the CDT time zone will have the time zone listed as "-0500" in the headers of the email. (However, "-0500" does not have to be in CDT, as other time zones could have the same UTC offset).

Where and when is CDT observed?

CDT is used in the summer in these US states (CST during winter)

• Alabama
• Arkansas
• Florida - North-West parts
  Bay, Calhoun, Escambia, Holmes, Jackson, Okaloosa, Santa Rosa, Walton and Washington counties and norther Gulf county
• Illinois
• Indiana - these few north-western counties near Chicago
  Lake, Porter, La Porte, Newton, Jasper, Starke
  and these south-western counties in Indiana near Evansville
  Gibson, Posey, Vanderburgh, Warrick, Perry
• Iowa
• Kansas - except these western counties
  Greeley, Hamilton, Sherman and Wallace - MST/MDT
• Kentucky - Western part
  Adair, Allen, Ballard, Barren, Breckinridge, Butler, Caldwell, Calloway, Carlisle, Christian, Clinton, Crittenden, Cumberland, Daviess, Edmonson, Fulton, Graves, Grayson, Green, Hansock, Hart, Henderson, Hickman, Hopkins, Livingston, Logan, Lyon, Marshall, McCracken, McLean, Metcalfe, Monroe, Muhlenberg, Ohio, Russell, Simpson, Todd, Trigg, Union, Warren and Webster counties
• Louisiana
• Michigan - A few western counties
  Dickinson, Gogebic, Iron, and Menominee
• Minnesota
• Mississippi
• Missouri
• Nebraska - Eastern parts
  All except Arthur, Banner, Box Butte, Chase, Cheyenne, Dawes, Deuel, Dundy, Garden, Grant, Hooker, Keith, Kimball, Morrill, Perkins, Scotts Bluff, Sheridan, and Sioux counties and the western part of Cherry county which are on MST/MDT
• North Dakota - North and Eastern parts
  counties of Barnes, Benson, Bottineau, Burke, Burleigh, Cass, Cavalier, Dickey, Divide, Eddy, Emmons, Foster, Grand Forks, Griggs, Kidder, Lamoure, Logan, McHenry, McIntosh, McLean, Mountrail, Nelson, Oliver, Pembina, Pierce, Ramsey, Ransom, Renville, Richland, Rolette, Sargent, Sheridan, Steele, Stutsman, Towner, Traill, Walsh, Ward, Wells, Williams and northern parts of McKenzie and Dunn, westernmost part of Morton and Fort Yates in Sioux
• Oklahoma
• South Dakota - Eastern parts
  counties of Aurora, Beadle, Bon Homme, Brookings, Brown, Brule, Buffalo, Campbell, Charles Mix, Clark, Clay, Codington, Davison, Day, Deuel, Douglas, Edmunds, Faulk, Grant, Gregory, Hamlin, Hand, Hanson, Hughes, Hutchinson, Hyde, Jerauld, Kingsbury, Lake, Lincoln, Lyman, Marshall, McCook, McPherson, Miner, Minnehaha, Moody, Potter, Roberts, Spink, Sanborn, Sully, Tripp, Turner, Union, Yankton, Walworth and eastern parts of Jones and Stanley
• Tennessee - Western part
  counties of 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, Trusdale, Van Buren, Warren, Wayne Weakley, White, Willamson, Wilson
• Texas - All, but a few counties in west
  El Paso and Hudspeth and part of Culberson
• Wisconsin

CDT is used during summer in these Canadian provinces (CST during winter)

• Manitoba
• Nunavut - Kugluktuk, Cambridge Bay only (Other parts use EST/EDT or EST only)
• Ontario - most parts west of 90 West. (Parts east of 90 West is on EST/EDT)
• Saskatchewan - only Creighton and Denare Beach

CDT is used during summer in these Mexican states (CST during winter)

• Aguascalientes
• Campeche
• Chiapas
• Coahuila
• Colima
• Distrito Federal
• Durango
• Guanajuato
• Guerro
• Hidalgo
• Jalisco
• León
• Michoacán
• Morelos
• México
• Nuevo León
• Oaxaca
• Puebla
• Querétaro
• Quintana Roo
• San Luis Potosí
• Tabasco
• Tamaulipas
• Tlaxcala
• Veracruz
• Yucatán
• Zacatecas

Example locations in CDT

• Chicago - during summer
• Mexico City - during summer

Other time zones in North America

• NST - Newfoundland Standard Time
• NDT - Newfoundland Daylight Time
• AST - Atlantic Standard Time
• ADT - Atlantic Daylight Time
• EST - Eastern Standard Time
• EDT - Eastern Daylight Time
• CST - Central Standard Time
• MST - Mountain Standard Time
• MDT - Mountain Daylight Time
• PST - Pacific Standard Time
• PDT - Pacific Daylight Time
• AKST - Alaska Standard Time
• AKDT - Alaska Daylight Time
• HAST - Hawaii-Aleutian Standard Time
• HADT - Hawaii-Aleutian Daylight Time

Time zones in other regions

• Australia
• Europe
• Military

Related links

• Time zone abbreviations world-wide
• The World Clock - Time Zones - current time around the world
• The World Clock - Time Zone Converter - Convert between time zones
• World Clock - North America - current time in North America