What Is Central Standard Time?
Central Standard Time Zone
Central Standard Time (CST) is a standard time zone in use from the first Sunday in November to the second Sunday in March—when Daylight Saving Time (DST) is not in effect. Central Daylight Time (CDT) is used during the remainder of the year.
CST Iis the Central Time Zone
In everyday usage, CST is often referred to as Central Time (CT) or the Central Time Zone. This can add a bit of confusion as the term Eastern Time does not differentiate between standard time and Daylight Saving Time, so Central Time switches between CST and CDT in areas that use DST during part of the year.
Converting Central Time to Other US Time Zones
- Central Standard Time (CST) is 1 hour behind Eastern Standard Time (EST).
To convert CST to EST, you have to add one hour.
- Central Standard Time (CST) is 1 hour ahead of Mountain Standard Time (MST).
To convert CST to MST, you have to subtract one hour.
- Central Standard Time (CST) is 2 hours ahead of Pacific Standard Time (PST).
To convert CST to PST, you have to subtract two hours.
Where and When is CST Observed?
U.S. states using CST in the winter and CDT in the summer:
- Florida - North-West parts
Bay, Calhoun, Escambia, Holmes, Jackson, Okaloosa, Santa Rosa, Walton and Washington counties and norther Gulf county
- 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, Spencer
- Kansas - except these western counties
- 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
- Michigan - A few western counties
Dickinson, Gogebic, Iron, and Menominee
- 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
- 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, Jones, Kingsbury, Lake, Lincoln, Lyman, Marshall, McCook, McPherson, Mellette, Miner, Minnehaha, Moody, Potter, Roberts, Spink, Sanborn, Sully, Todd, Tripp, Turner, Union, Yankton, Walworth and eastern parts of 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
Canadian provinces using CST in the winter and CDT in the summer:
- Ontario - most parts west of 90 West. (Parts east of 90 West is on EST/EDT)
- Saskatchewan - only Creighton and Denare Beach
Canadian provinces using CST all year:
- Ontario - a few communities
Atikokan, New Osnaburgh, Pickle Lake
- Saskatchewan - most of it
Mexican states using CST in the winter and CDT in the summer:
Other Central Standard Time Zones
Time zones can have similar names and abbreviations but have a different UTC offset:
Other Time Zones in UTC -6
Some time zones exist that have the same offset as CST, but can be found under a different name: