Time in Michigan

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All counties in Michigan's Lower Peninsula observe Eastern Time, as do most counties in the state's Upper Peninsula. The U.P. counties that do not, the four counties which have a land border with Wisconsin, are in the Central Time zone.


In 1967, when the Uniform Time Act came into effect, the Upper Peninsula went under year-round CST, with no daylight saving time.[1] In 1973, the majority of the peninsula switched to Eastern Time;[2] only the four western counties of Gogebic, Iron, Dickinson, and Menominee continue to observe Central Time.

IANA time zone database[edit]

The zone for Michigan as given by zone.tab of the IANA time zone database[3]

c.c. coordinates TZ comments UTC offset UTC offset DST Note
US +421953-0830245 America/Detroit Eastern Time - Michigan - most locations −05:00 −04:00
US +450628-0873651 America/Menominee Central Time - Michigan - Dickinson, Gogebic, Iron & Menominee Counties −06:00 −05:00


  1. ^ "State Constitutions: Referendum Row". Time. July 7, 1967. Retrieved July 25, 2007. 
  2. ^ Law, Gwillim (February 19, 2007). "United States Time Zones". Statoids. Retrieved July 25, 2007. 
  3. ^ http://www.iana.org/time-zones

See also[edit]