KST to CST converter
When it's 9:00 am in Seoul, it's 7:00 pm the day before in Chicago (6:00 pm the day before from November to March). Your working days don't overlap at all, so someone starts early or stays late for every call.
Convert Korea Standard Time (KST) to Central Standard Time (CST) for any date and time.
Central Time is 14 hours behind Korea Standard Time from March to November, and 15 hours behind the rest of the year.
Right now KST is UTC+9 and Central Time is on CDT (UTC−5). Central Time switches back to standard time on 1 November 2026.
US clocks go back on 1 November 2026. From then, CST is 15 hours behind KST.
9:00 am to 5:00 pm KST is 7:00 pm CDT the day before to 3:00 am CDT.
- 8:00 am KST is 6:00 pm CDT the day before
- 9:00 am KST is 7:00 pm CDT the day before
- 10:00 am KST is 8:00 pm CDT the day before
- 12:00 pm KST is 10:00 pm CDT the day before
- 3:00 pm KST is 1:00 am CDT
- 5:00 pm KST is 3:00 am CDT
Hours in Korea Standard Time, Fri, Oct 23
Korea Standard Time
South Korea
Fri, Oct 23
KST · UTC+9ReferenceOutside working hoursCentral Time
US, Canada & Mexico
Fri, Oct 23
CDT · UTC−5−14h from Korea Standard TimeOutside working hours
No shared working hours on Fri, Oct 23. Pick the slot closest to everyone's working day, or let each person pick from your availability.
Share a booking link insteadWorking hours: 9:00 AM–5:00 PM, Monday to FridayEveryone at work
KST to CST conversion table
Every hour of the day in KST, converted to CDT. Shaded cells are working hours (9:00 am to 5:00 pm); green rows are working hours in both zones.
| KST | CDTUntil 1 November 2026; From 14 March 2027 | CST1 November 2026 to 14 March 2027 |
|---|---|---|
| 12:00 am KST | 10:00 am CDT(day before) | 9:00 am CST(day before) |
| 1:00 am KST | 11:00 am CDT(day before) | 10:00 am CST(day before) |
| 2:00 am KST | 12:00 pm CDT(day before) | 11:00 am CST(day before) |
| 3:00 am KST | 1:00 pm CDT(day before) | 12:00 pm CST(day before) |
| 4:00 am KST | 2:00 pm CDT(day before) | 1:00 pm CST(day before) |
| 5:00 am KST | 3:00 pm CDT(day before) | 2:00 pm CST(day before) |
| 6:00 am KST | 4:00 pm CDT(day before) | 3:00 pm CST(day before) |
| 7:00 am KST | 5:00 pm CDT(day before) | 4:00 pm CST(day before) |
| 8:00 am KST | 6:00 pm CDT(day before) | 5:00 pm CST(day before) |
| 9:00 am KST | 7:00 pm CDT(day before) | 6:00 pm CST(day before) |
| 10:00 am KST | 8:00 pm CDT(day before) | 7:00 pm CST(day before) |
| 11:00 am KST | 9:00 pm CDT(day before) | 8:00 pm CST(day before) |
| 12:00 pm KST | 10:00 pm CDT(day before) | 9:00 pm CST(day before) |
| 1:00 pm KST | 11:00 pm CDT(day before) | 10:00 pm CST(day before) |
| 2:00 pm KST | 12:00 am CDT | 11:00 pm CST(day before) |
| 3:00 pm KST | 1:00 am CDT | 12:00 am CST |
| 4:00 pm KST | 2:00 am CDT | 1:00 am CST |
| 5:00 pm KST | 3:00 am CDT | 2:00 am CST |
| 6:00 pm KST | 4:00 am CDT | 3:00 am CST |
| 7:00 pm KST | 5:00 am CDT | 4:00 am CST |
| 8:00 pm KST | 6:00 am CDT | 5:00 am CST |
| 9:00 pm KST | 7:00 am CDT | 6:00 am CST |
| 10:00 pm KST | 8:00 am CDT | 7:00 am CST |
| 11:00 pm KST | 9:00 am CDT | 8:00 am CST |
Best times to meet
A 9-to-5 working day in KST and one in CDT don't overlap. The closest fit is 9:00 am KST (7:00 pm CDT the day before), when one of you starts early or stays late.
About these time zones
KST: Korea Standard Time
Korea Standard Time is UTC+9.
South Korea, with no daylight saving time. North Korea uses the same offset.
CST: Central Standard Time
Central Standard Time is UTC−6. CST is also used for China Standard Time (UTC+8) and Cuba Standard Time (UTC−5). This page converts North American Central Time.
Texas, Illinois, Minnesota, Louisiana and most of the Midwest and South, plus Manitoba in Canada. Saskatchewan and most of Mexico stay on CST all year. CT is the short form for the whole zone.
Most places on Central Time are on CDT (UTC−5) right now, not CST. People still say "CST" all year, so the times on this page follow the clocks and show CDT until 1 November 2026.
How the difference changes
Right now CDT is 14 hours behind KST. From 1 November 2026, when US clocks go back, the difference becomes 15 hours. From 14 March 2027, when US clocks go forward, the difference becomes 14 hours.