Hour-by-hour overlap

Each row is one hour of the Chicago day and the matching hour in Seoul. Adjust the working hours to match how your team actually works.

Day starts

Day ends

Chicago	Seoul	Suitable?
12am	2pm	Working hours in Seoul only
1am	3pm	Working hours in Seoul only
2am	4pm	Working hours in Seoul only
3am	5pm	Working hours in Seoul only
9am	11pm	Working hours in Chicago only
10am	12am	Working hours in Chicago only
11am	1am	Working hours in Chicago only
12pm	2am	Working hours in Chicago only
1pm	3am	Working hours in Chicago only
2pm	4am	Working hours in Chicago only
3pm	5am	Working hours in Chicago only
4pm	6am	Working hours in Chicago only
5pm	7am	Working hours in Chicago only
7pm	9am	Working hours in Seoul only
8pm	10am	Working hours in Seoul only
9pm	11am	Working hours in Seoul only
10pm	12pm	Working hours in Seoul only
11pm	1pm	Working hours in Seoul only

Public holidays to avoid

Dates where one side is off work while the other is not are the most common cause of no-shows on this route.

Thursday, September 24, 2026 — Chuseok — Seoul is off, Chicago is working.

Friday, September 25, 2026 — Chuseok — Seoul is off, Chicago is working.

Saturday, September 26, 2026 — Chuseok — Seoul is off, Chicago is working.

Monday, October 5, 2026 — National Foundation Day — Seoul is off, Chicago is working.

Friday, October 9, 2026 — Hangul Day — Seoul is off, Chicago is working.

Monday, October 12, 2026 — Indigenous Peoples' Day — Chicago is off, Seoul is working.

Wednesday, November 11, 2026 — Veterans Day — Chicago is off, Seoul is working.

Thursday, November 26, 2026 — Thanksgiving Day — Chicago is off, Seoul is working.

Friday, December 25, 2026 — Christmas Day and Christmas Day; both cities are off.

Chicago and Seoul have no shared working hours, so a recurring live meeting always costs someone their morning or their evening. Rotating the burden, or moving the update to written form, is usually the better answer.

Sending a booking link avoids the arithmetic entirely: each side picks a time in their own zone and both calendars get the correct local time, including after a daylight-saving change. See how LemCall handles cross-timezone bookings.

Frequently asked questions

What is the time difference between Chicago and Seoul?

Seoul is currently 14 hours ahead of Chicago. That changes to 15 hours ahead of on Sunday, November 1, 2026, when one side shifts for daylight saving.

When is the best time to schedule a meeting between Chicago and Seoul?

There is no hour where both cities are inside normal working hours, so one side has to take the call early or late.

How many hours do Chicago and Seoul overlap?

Zero, on a standard 9–18 working day in each city.

Does daylight saving change the Chicago–Seoul gap?

Yes. Over the next twelve months the difference changes 2 times: Sunday, November 1, 2026 (14 hours ahead of becomes 15 hours ahead of); Sunday, March 14, 2027 (15 hours ahead of becomes 14 hours ahead of).

Are there public holidays that affect Chicago–Seoul meetings?

Yes. The next is Thursday, September 24, 2026 — a public holiday where Seoul is, but a normal working day in Chicago.

Chicago to Seoul: time difference and best times to meet

Hour-by-hour overlap

When the gap changes in the next twelve months

Public holidays to avoid

Frequently asked questions

Sources

Hour-by-hour overlap

When the gap changes in the next twelve months

Public holidays to avoid

Frequently asked questions

Other meeting-time pages for Chicago

Sources