KST: Korea Standard Time
Korea Standard Time is UTC+9.
South Korea, with no daylight saving time. North Korea uses the same offset.
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 CST (UTC−6). Central Time switches to daylight saving time on 14 March 2027.
9:00 am to 5:00 pm KST is 6:00 pm CST the day before to 2:00 am CST.
- 8:00 am KST5:00 pm CST the day before
- 9:00 am KST6:00 pm CST the day before
- 10:00 am KST7:00 pm CST the day before
- 12:00 pm KST9:00 pm CST the day before
- 3:00 pm KST12:00 am CST
- 5:00 pm KST2:00 am CST
Live: the current time
Korea Standard TimeReference
South Korea
Thu, Nov 5
KST UTC+9ReferenceOutside working hoursCentral Time
US, Canada & Mexico
Wed, Nov 4Previous day
CST UTC−6−15h from Korea Standard TimeWorking hours
No shared working hours on Thu, Nov 5. Closest fit: 7:00 AM–8:00 AM and 9:00 AM–10:00 AM in Korea Standard Time, when 1 of 2 are at work and the rest are nearest their day.
Share a booking link insteadWorking hours: 9:00 AM–5:00 PM, Monday to FridayClosest fit
KST to CST conversion table
Every hour of the day in KST, converted to CST. Hatched cells are working hours (9:00 am to 5:00 pm); rows with the accent bar are working hours in both zones.
| KST | CSTUntil 14 March 2027 | CDTFrom 14 March 2027 |
|---|---|---|
| 12:00 am KST | 9:00 am CST(day before) | 10:00 am CDT(day before) |
| 1:00 am KST | 10:00 am CST(day before) | 11:00 am CDT(day before) |
| 2:00 am KST | 11:00 am CST(day before) | 12:00 pm CDT(day before) |
| 3:00 am KST | 12:00 pm CST(day before) | 1:00 pm CDT(day before) |
| 4:00 am KST | 1:00 pm CST(day before) | 2:00 pm CDT(day before) |
| 5:00 am KST | 2:00 pm CST(day before) | 3:00 pm CDT(day before) |
| 6:00 am KST | 3:00 pm CST(day before) | 4:00 pm CDT(day before) |
| 7:00 am KST | 4:00 pm CST(day before) | 5:00 pm CDT(day before) |
| 8:00 am KST | 5:00 pm CST(day before) | 6:00 pm CDT(day before) |
| 9:00 am KST | 6:00 pm CST(day before) | 7:00 pm CDT(day before) |
| 10:00 am KST | 7:00 pm CST(day before) | 8:00 pm CDT(day before) |
| 11:00 am KST | 8:00 pm CST(day before) | 9:00 pm CDT(day before) |
| 12:00 pm KST | 9:00 pm CST(day before) | 10:00 pm CDT(day before) |
| 1:00 pm KST | 10:00 pm CST(day before) | 11:00 pm CDT(day before) |
| 2:00 pm KST | 11:00 pm CST(day before) | 12:00 am CDT |
| 3:00 pm KST | 12:00 am CST | 1:00 am CDT |
| 4:00 pm KST | 1:00 am CST | 2:00 am CDT |
| 5:00 pm KST | 2:00 am CST | 3:00 am CDT |
| 6:00 pm KST | 3:00 am CST | 4:00 am CDT |
| 7:00 pm KST | 4:00 am CST | 5:00 am CDT |
| 8:00 pm KST | 5:00 am CST | 6:00 am CDT |
| 9:00 pm KST | 6:00 am CST | 7:00 am CDT |
| 10:00 pm KST | 7:00 am CST | 8:00 am CDT |
| 11:00 pm KST | 8:00 am CST | 9:00 am CDT |
Best times to meet
A 9-to-5 working day in KST and one in CST don't overlap. The closest fit is 9:00 am KST (6:00 pm CST the day before), when one of you starts early or stays late.
About these time zones
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.
How the difference changes
Right now CST is 15 hours behind KST. From 14 March 2027, when US clocks go forward, the difference becomes 14 hours.
Frequently asked questions
Ask a questionCentral Time is 14 hours behind Korea Standard Time from March to November, and 15 hours behind the rest of the year. KST is UTC+9, and CST is UTC−6.
9:00 am KST is 6:00 pm CST the day before.
Yes, because Central Time changes its clocks and Korea Standard Time doesn't. Central Time is 14 hours behind Korea Standard Time from March to November, and 15 hours behind the rest of the year.
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