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Time difference between Istanbul and Chicago

Chicago is 8 hours behind Istanbul

Istanbul, Türkiye is UTC+3 · Chicago, the United States is UTC−6 — on standard time

The gap is not the same all year

Every converter gives one number for this pair. That number is right for most of the year and wrong for part of it, because Istanbul does not change its clocks and Chicago goes forward on the second Sunday in March and back on the first Sunday in November.

Istanbul / Chicago clocksDifferenceHow long
standard / summer8 hours behindabout 34 weeks — most of the year
standard / standard9 hours behindabout 18 weeks

Istanbul stays put all year while Chicago moves, so the gap changes twice a year from Chicago's side alone. A recurring meeting set in Istanbul's calendar will drift by an hour without anyone touching it.

When they can both be at their desks

Nine-to-five in Istanbul and nine-to-five in Chicago do not overlap at all. With 8 hours between them, one side is always outside working hours, and the practical question is which side takes the early start or the late finish rather than when to meet.

Istanbul to Chicago, hour by hour

IstanbulChicago
12:00 AM4:00 PM (previous day)
1:00 AM5:00 PM (previous day)
2:00 AM6:00 PM (previous day)
3:00 AM7:00 PM (previous day)
4:00 AM8:00 PM (previous day)
5:00 AM9:00 PM (previous day)
6:00 AM10:00 PM (previous day)
7:00 AM11:00 PM (previous day)
8:00 AM12:00 AM
9:00 AM1:00 AM
10:00 AM2:00 AM
11:00 AM3:00 AM
12:00 PM4:00 AM
1:00 PM5:00 AM
2:00 PM6:00 AM
3:00 PM7:00 AM
4:00 PM8:00 AM
5:00 PM9:00 AM
6:00 PM10:00 AM
7:00 PM11:00 AM
8:00 PM12:00 PM
9:00 PM1:00 PM
10:00 PM2:00 PM
11:00 PM3:00 PM

On the usual gap of 8 hours.

Frequently asked questions

What is the time difference between Istanbul and Chicago?

Chicago is 8 hours behind Istanbul for most of the year. It is not the same all year — there is one other gap, because Istanbul does not change its clocks and Chicago goes forward on the second Sunday in March and back on the first Sunday in November.

Is Chicago ahead of Istanbul?

No — Chicago is 8 hours behind. Istanbul is UTC+3 and Chicago is UTC−6 on standard time.

What time is 9 AM in Istanbul in Chicago?

1:00 AM, on the usual gap.

When can Istanbul and Chicago meet?

Nine-to-five in Istanbul and nine-to-five in Chicago do not overlap at all. One side has to take the call outside working hours, and with 8 hours between them it is worth deciding in advance which side that is.

Other pairs

Every Istanbul pair · Every Chicago pair · All city pairs · Time zones by abbreviation