South Korea to Chicago
-14hSouth Korea
KSTSOURCEChicago
CDTGreen rows indicate typical business hours (9 AM - 5 PM)
KST and CDT on the World Map
The map below highlights the KST (Korea Standard Time) and CDT (Central Standard Time) timezone regions across the globe.
KST – Korea Standard Time
UTC+09:00Korea Standard Time (KST) is the time zone for South Korea, 9 hours ahead of UTC.
- •South Korea does not observe daylight saving time.
- •Seoul is home to Samsung, LG, and Hyundai headquarters.
- •KST is the same offset as JST (UTC+09:00).
CST – Central Standard Time
UTC-06:00Central Standard Time (CST) is the time zone for the central United States, Canada, and Mexico, 6 hours behind UTC.
- •CST covers 20 US states fully or partially.
- •Chicago and Houston are the two largest cities in the Central Time Zone.
- •Mexico City, one of the world's most populous cities, operates on CST.
- •CST is 1 hour behind EST and 2 hours ahead of PST.
About Chicago
WikipediaChicago operates on Central Time (CST/CDT), 1 hour behind New York. Home to CME and CBOE, Chicago is a global center for derivatives trading.
The Chicago Board of Trade is the world's oldest futures and options exchange.
South Korea vs Chicago: Offsets, DST and Best Call Times
South Korea runs on Korean Standard Time (KST) at UTC+09:00. Chicago runs on Central Daylight Time (CDT) at UTC-05:00, also currently on daylight saving time. That puts South Korea 14 hours behind Chicago — a difference of -14h at the current offsets.
In practice, when it is 9:00 AM in South Korea it is 7:00 PM in Chicago on the previous day. Midnight in South Korea is 10:00 AM in Chicago.Chicago observes daylight saving time while South Korea does not, so the gap narrows or widens by an hour part of the year.
South Korea to Chicago time conversion table
| South Korea (KST) | Chicago (CDT) | Day |
|---|---|---|
| 12:00 AM | 10:00 AM | previous day |
| 6:00 AM | 4:00 PM | previous day |
| 7:00 AM | 5:00 PM | previous day |
| 8:00 AM | 6:00 PM | previous day |
| 9:00 AM | 7:00 PM | previous day |
| 12:00 PM | 10:00 PM | previous day |
| 3:00 PM | 1:00 AM | same day |
| 5:00 PM | 3:00 AM | same day |
| 6:00 PM | 4:00 AM | same day |
| 9:00 PM | 7:00 AM | same day |
Why people convert South Korea to Chicago time
- Scheduling a call from South Korea to Chicago: a 10:00 AM start in South Korea lands at 8:00 PM in Chicago the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -14h gap: South Korea and Chicago have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in Chicago is 7:00 PM in South Korea.
- Watching a live event or market open: South Korea viewers need 7:00 PM in Chicago to catch a 9:00 AM start there, and 2:00 PM if the event is anchored to South Korea.
- Always state the zone abbreviation, not just the hour. "3:00 PM KST" is unambiguous; "3 PM" across a -14h gap is not.
- With a -14h gap there is no shared 9-to-5 window, so alternate the early start: one week South Korea takes the early slot, the next week Chicago does.
- Chicago: Clocks fall back on Sun, Nov 1, 2026. Any meeting series spanning that date will shift by an hour in local time.
About KST (Korea Standard Time)
Korea Standard Time (KST) is the time zone used in South Korea. It shares the same UTC offset as Japan Standard Time but is a distinct time zone. South Korea does not observe daylight saving time. Seoul, the capital, is a major global tech and business hub.
About CST (Central Standard Time)
Central Standard Time (CST) covers the central region of North America. It is the second most populous time zone in the US, including major cities like Chicago, Houston, and Dallas. CST is also used in Mexico City and much of Central America including Guatemala, Honduras, El Salvador, and Costa Rica. During summer, most of the US and Canada switch to Central Daylight Time (CDT, UTC-05:00), while Mexico and Central American countries generally remain on CST.
Best time to call between South Korea and Chicago
With a -14h offset there is no overlap inside a normal 9 AM – 5 PM day. Chicago opens at 9:00 AM CDT, which is 7:00 PM in South Korea, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
South Korea and Chicago have no shared working hours because of the -14h gap. Teams need to alternate early starts or rely on asynchronous handovers.
South Korea is 14 hours behind Chicago (KST UTC+09:00 → CDT UTC-05:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
South Korea
Does not observe DST
Chicago
☀ Currently in DST
Standard: UTC-06:00 · DST: UTC-05:00
Clocks fall back on Sun, Nov 1, 2026
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between South Korea and Chicago?
South Korea (KST, UTC+09:00) is 14 hours behind Chicago (CDT, UTC-05:00). The gap is currently -14h.
How do I convert South Korea time to Chicago time?
Add -14h to South Korea local time. For example, 9:00 AM in South Korea is 7:00 PM in Chicago (previous day).
What time is it in Chicago right now?
Chicago uses CDT at UTC-05:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -14h offset from South Korea.
What is the best time to call Chicago from South Korea?
There is no shared working-hours window because of the -14h gap. The closest option is 1:00 PM in South Korea, which is 11:00 PM in Chicago.
Which is behind, South Korea or Chicago?
South Korea is 14 hours behind Chicago. When it is 12:00 PM in South Korea it is 10:00 PM in Chicago.
Do South Korea and Chicago use different time zones?
South Korea (South Korea) uses KST at UTC+09:00, while Chicago (USA) uses CDT at UTC-05:00. The IANA identifiers are Asia/Seoul and America/Chicago.
Does daylight saving time affect the South Korea–Chicago difference?
Yes at the moment: Chicago is on daylight saving time and South Korea is not, so the -14h gap shifts by an hour when exactly one of them changes clocks.
Which other cities share South Korea's time zone?
KST also covers Seoul, Busan, Incheon, Daegu, Daejeon, Pyongyang.
Which countries use KST, South Korea's zone?
KST is used in South Korea, North Korea.
Is there a day difference between South Korea and Chicago?
Sometimes. The -14h gap is large enough that 8:00 PM or later in South Korea already falls on the in Chicago.
What is the time difference between South Korea and Chicago?
Chicago is -14h from South Korea.
What timezone is South Korea in?
South Korea operates on its local timezone.
What timezone is Chicago in?
Chicago operates on Central Time (CST/CDT), 1 hour behind New York. Home to CME and CBOE, Chicago is a global center for derivatives trading.
What are the business hours in Chicago?
Standard business hours in Chicago are 8:00 AM - 5:00 PM CST.
Which countries use KST (Korea Standard Time)?
KST is used in South Korea, North Korea.
Does KST observe daylight saving time?
No, KST does not observe daylight saving time and remains at UTC+09:00 year-round.
What are some interesting facts about KST?
South Korea does not observe daylight saving time. Seoul is home to Samsung, LG, and Hyundai headquarters.
Which cities are in the CST timezone?
Major cities in the CST timezone include Chicago, Houston, Dallas, San Antonio, Mexico City, Austin, Winnipeg, Memphis.
What is the UTC offset for CST?
Central Standard Time (CST) is at UTC-06:00. During daylight saving time, it shifts to CDT.
What should I know about the CST timezone?
CST covers 20 US states fully or partially. Chicago and Houston are the two largest cities in the Central Time Zone.
When is it midnight in South Korea, what time is it in Chicago?
When it is 12:00 AM (midnight) in South Korea (KST), it is -14h later in Chicago (CST).
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