what timezone is illinois on?
Central Time Zone UTC−06:00
neutral
 Illinois 

neutral
 Illinois 

entailment
 Start and end dates vary with location and year . Since 1996 , European Summer Time has been observed from the last Sunday in March to the last Sunday in October ; previously the rules were not uniform across the European Union . Starting in 2007 , most of the United States and Canada observe DST from the second Sunday in March to the first Sunday in November , almost two @-@ thirds of the year . The 2007 US change was part of the Energy Policy Act of 2005 ; previously , from 1987 through 2006 , the start and end dates were the first Sunday in April and the last Sunday in October , and Congress retains the right to go back to the previous dates now that an energy @-@ consumption study has been done . Proponents for permanently retaining November as the month for ending DST point to Halloween as a reason to delay the change — to provide extra daylight on October 31 . 

neutral
 = = = = Midwest : Illinois and Michigan = = = = 

neutral
 The National Weather Service Central Illinois is in charge of weather forecasts , warnings and local statements for 35 counties in Central and Southeastern Illinois : Cass , Champaign , Christian , Clark , Clay , Coles , Crawford , Cumberland , De Witt , Douglas , Edgar , Effingham , Fulton , Jasper , Knox , Lawrence , Logan , McLean , Macon , Marshall , Mason , Menard , Morgan , Moultrie , Peoria , Piatt , Richland , Sangamon , Schuyler , Scott , Shelby , Stark , Tazewell , Vermilion , and Woodford . In addition the office is in charge of aviation forecasts for five regional airports , Peoria , Springfield , Decatur , Champaign and Bloomington / Normal . 
