C
The DST column shows the months in which Daylight Saving Time, a.k.a. Summer Time, begins and ends. A blank DST box usually indicates that the location stays on Standard Time all year, although in some cases the location stays on Summer Time all year. If a location is currently on DST, add one hour to the time in the Time column.
Notes
Morocco temporarily suspends DST for the month of Ramadan. CHI is the common IATA code for O'Hare International Airport , Midway International Airport , DuPage Airport , Gary/Chicago International Airport , Chicago Executive Airport and Chicago Rockford International Airport .