UTC−06:00
Time zone
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Through Standard time
As standard time (Northern Hemisphere winter)
Principal cities: Chicago, Dallas, Houston, St. Louis, Minneapolis, Austin, Memphis, Kansas City, San Antonio, Nashville, New Orleans, Milwaukee, Oklahoma City, Reynosa
North America
CST is standard time in the 6th time zone west of Greenwich, centralized by the 90th meridian; used in North America in some parts of Canada, Mexico and the United States.
- Canada (Central Time Zone)
- Nunavut
- Kivalliq Region except Southampton Island (Coral Harbour)
- Ontario
- West of 90° west
- Nunavut
- Mexico (near US border with Texas)
- Chihuahua
- The municipalities of Coyame del Sotol, Ojinaga and Manuel Benavides
- Coahuila de Zaragoza
- The municipalities of Acuña, Allende, Guerrero, Hidalgo, Jiménez, Morelos, Nava, Ocampo, Piedras Negras, Villa Unión and Zaragoza
- Nuevo León
- The municipality of Anahuac
- Tamaulipas
- The municipalities of Nuevo Laredo, Guerrero, Mier, Miguel Alemán, Camargo, Gustavo Díaz Ordaz, Reynosa, Río Bravo, Valle Hermoso and Matamoros
- Chihuahua
- United States (Central Time Zone)
- Alabama
- The city of Phenix City uses both UTC−05:00 and UTC−06:00 due to its proximity to Columbus, Georgia
- Arkansas
- Florida
- The counties of Bay, Calhoun, Escambia, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and Washington, and northern Gulf County (panhandle)
- Illinois
- Indiana
- Northwestern counties of Jasper, Lake, LaPorte, Newton, Porter and Starke
- Southwestern counties of Gibson, Perry, Posey, Spencer, Vanderburgh and Warrick
- Iowa
- Kansas
- Entire state except Greeley, Hamilton, Sherman and Wallace counties
- Kentucky
- The counties of Breckinridge, Grayson, Hart, Green, Adair, Russell and Clinton, and all counties to the west of these
- Louisiana
- Michigan
- The western counties of Dickinson, Gogebic, Iron and Menominee
- Minnesota
- Mississippi
- Missouri
- Nebraska
- Central and eastern Nebraska
- North Dakota
- Entire state except southwest
- Oklahoma
- Entire state except Kenton
- South Dakota
- Eastern half
- Tennessee
- Counties to the west of the counties of Scott, Morgan, Roane, Rhea, and Hamilton
- Texas
- All except northwestern Culberson, El Paso and Hudspeth counties
- Wisconsin
- Alabama
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As daylight saving time (Northern Hemisphere summer)
Principal cities: Denver, Billings, Boise, Salt Lake City, Albuquerque, El Paso, Ciudad Juárez
North America
- Canada (Mountain Time Zone)
- Nunavut
- Kitikmeot Region
- Nunavut
- Mexico (near US border with New Mexico & western Texas)
- United States (Mountain Time Zone)
- Arizona - Navajo Nation only
- Colorado
- Idaho
- South of Salmon River
- Kansas
- The western counties of Greeley, Hamilton, Sherman and Wallace
- Montana
- Nebraska
- The western counties of Cherry (western part), Hooker, Arthur, Keith, Perkins, Chase and Dundy, and all counties to the west of these
- Nevada
- West Wendover
- New Mexico
- North Dakota
- The Southwestern counties of Adams, Billings, Bowman, Dunn (southern part), Golden Valley, Grant, Hettinger, McKenzie (southern part), Sioux (west of ND route 31), Slope and Stark
- Oklahoma
- Kenton
- Oregon
- Malheur County (except a small strip in the south)
- South Dakota
- The western counties of Corson, Dewey, Stanley (western part), Jackson and Bennett, and all counties to the west of these
- Texas
- The western counties of Culberson (northwestern part), El Paso and Hudspeth
- Utah
- Wyoming
As standard time (year-round)
Principal cities: Yellowknife, Calgary, Edmonton, Regina, Saskatoon, Puebla, Orizaba, Mexico City, Guadalajara, Monterrey, Guatemala City, Tegucigalpa, Managua, Belmopan, Belize City, San José, San Salvador, San Pedro Sula, Liberia.
Central America
- Belize
- Costa Rica
- El Salvador
- Guatemala
- Honduras
- Nicaragua
- Called Central America Time Zone
North America
- Canada (Central Time Zone)
- British Columbia
- Regional District of East Kootenay
- Town of Golden
- Columbia-Shuswap Regional District
- Northwest Territories, where it is officially called Northwest Territories Time.
- Alberta, where it is officially called Alberta Time and formerly known as Mountain Daylight Time.
- Saskatchewan
- British Columbia
- Mexico (Zona Centro)
- All except Baja California, Baja California Sur, most of Nayarit, Quintana Roo, Sinaloa, Sonora and the northern municipalities of Chihuahua, Coahuila, Nuevo León and Tamaulipas.
- A small enclave of the UTC−6 time zone is followed in the municipality of Bahía de Banderas, Nayarit, due to its strong economic ties with the neighboring municipality of Puerto Vallarta, Jalisco.
Oceania
East Pacific
- Ecuador
- Galápagos Province
As standard time (Southern Hemisphere winter)
Principal settlement: Hanga Roa
Oceania
East Pacific
- Chile