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Time difference between Chicago and Seoul

Seoul is 14 hours ahead of Chicago

Chicago, the United States is UTC−6 · Seoul, South Korea is UTC+9 — 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 Chicago goes forward on the second Sunday in March and back on the first Sunday in November and Seoul does not change its clocks.

Chicago / Seoul clocksDifferenceHow long
summer / standard14 hours aheadabout 34 weeks — most of the year
standard / standard15 hours aheadabout 18 weeks

Seoul stays put all year while Chicago moves, so a meeting fixed in Seoul's calendar shifts by an hour twice a year at Chicago's end.

When they can both be at their desks

Nine-to-five in Chicago and nine-to-five in Seoul do not overlap at all. With 14 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.

Chicago to Seoul, hour by hour

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

On the usual gap of 14 hours.

Frequently asked questions

What is the time difference between Chicago and Seoul?

Seoul is 14 hours ahead of Chicago for most of the year. It is not the same all year — there is one other gap, because Chicago goes forward on the second Sunday in March and back on the first Sunday in November and Seoul does not change its clocks.

Is Seoul ahead of Chicago?

Yes — Seoul is 14 hours ahead. Chicago is UTC−6 and Seoul is UTC+9 on standard time.

What time is 9 AM in Chicago in Seoul?

11:00 PM, on the usual gap.

When can Chicago and Seoul meet?

Nine-to-five in Chicago and nine-to-five in Seoul do not overlap at all. One side has to take the call outside working hours, and with 14 hours between them it is worth deciding in advance which side that is.

Other pairs

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