Chicago to South Korea
+14hChicago
CDTSOURCESouth Korea
KSTGreen rows indicate typical business hours (9 AM - 5 PM)
CDT and KST on the World Map
The map below highlights the CDT (Central Standard Time) and KST (Korea Standard Time) timezone regions across the globe.
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.
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).
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.
Chicago vs South Korea: Offsets, DST and Best Call Times
Chicago runs on Central Daylight Time (CDT) at UTC-05:00, currently observing daylight saving time. South Korea runs on Korean Standard Time (KST) at UTC+09:00. That puts Chicago 14 hours ahead of South Korea — a difference of +14h at the current offsets.
In practice, when it is 9:00 AM in Chicago it is 11:00 PM in South Korea. Midnight in Chicago is 2:00 PM in South Korea.Chicago observes daylight saving time while South Korea does not, so the gap narrows or widens by an hour part of the year.
Chicago to South Korea time conversion table
| Chicago (CDT) | South Korea (KST) | Day |
|---|---|---|
| 12:00 AM | 2:00 PM | same day |
| 6:00 AM | 8:00 PM | same day |
| 7:00 AM | 9:00 PM | same day |
| 8:00 AM | 10:00 PM | same day |
| 9:00 AM | 11:00 PM | same day |
| 12:00 PM | 2:00 AM | next day |
| 3:00 PM | 5:00 AM | next day |
| 5:00 PM | 7:00 AM | next day |
| 6:00 PM | 8:00 AM | next day |
| 9:00 PM | 11:00 AM | next day |
Why people convert Chicago to South Korea time
- Scheduling a call from Chicago to South Korea: a 10:00 AM start in Chicago lands at 12:00 AM in South Korea the next day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +14h gap: Chicago and South Korea 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 South Korea is 11:00 PM in Chicago.
- Booking travel or deliveries: tracking South Korea local time against Chicago keeps pickup windows and arrival estimates honest across the +14h offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM CDT" 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 Chicago takes the early slot, the next week South Korea does.
- Chicago: Clocks fall back on Sun, Nov 1, 2026. Re-check this page after that date because the offset changes and so does the +14h gap.
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.
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.
Best time to call between Chicago and South Korea
With a +14h offset there is no overlap inside a normal 9 AM – 5 PM day. South Korea opens at 9:00 AM KST, which is 11:00 PM in Chicago, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
Chicago and South Korea have no shared working hours because of the +14h gap. Teams need to alternate early starts or rely on asynchronous handovers.
Chicago is 14 hours ahead of South Korea (CDT UTC-05:00 → KST UTC+09:00). 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
Chicago
☀ Currently in DST
Standard: UTC-06:00 · DST: UTC-05:00
Clocks fall back on Sun, Nov 1, 2026
South Korea
Does not observe DST
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 Chicago and South Korea?
Chicago (CDT, UTC-05:00) is 14 hours ahead of South Korea (KST, UTC+09:00). The gap is currently +14h.
How do I convert Chicago time to South Korea time?
Add +14h to Chicago local time. For example, 9:00 AM in Chicago is 11:00 PM in South Korea.
What time is it in South Korea right now?
South Korea uses KST at UTC+09:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +14h offset from Chicago.
What is the best time to call South Korea from Chicago?
There is no shared working-hours window because of the +14h gap. The closest option is 1:00 PM in Chicago, which is 3:00 AM in South Korea.
Which is ahead, Chicago or South Korea?
Chicago is 14 hours ahead of South Korea. When it is 12:00 PM in Chicago it is 2:00 AM in South Korea.
Do Chicago and South Korea use different time zones?
Chicago (USA) uses CDT at UTC-05:00, while South Korea (South Korea) uses KST at UTC+09:00. The IANA identifiers are America/Chicago and Asia/Seoul.
Does daylight saving time affect the Chicago–South Korea 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 Chicago's time zone?
CDT also covers Chicago, Houston, Dallas, San Antonio, Mexico City, Austin, Winnipeg, Memphis and 6 more.
Which countries use CDT, Chicago's zone?
CDT is used in United States (Central), Canada (Manitoba, Saskatchewan), Mexico, Guatemala, Honduras, El Salvador, Costa Rica, Nicaragua and 1 more.
Is there a day difference between Chicago and South Korea?
Sometimes. The +14h gap is large enough that 8:00 PM or later in Chicago already falls on the next day in South Korea.
What is the time difference between Chicago and South Korea?
South Korea is +14h from Chicago.
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 timezone is South Korea in?
South Korea operates on its local timezone.
What are the business hours in Chicago?
Standard business hours in Chicago are 8:00 AM - 5:00 PM CST.
Which countries use CST (Central Standard Time)?
CST is used in United States (Central), Canada (Manitoba, Saskatchewan), Mexico, Guatemala, Honduras, El Salvador, and 3 more countries.
Does CST observe daylight saving time?
Yes, CST switches to CDT during summer months.
What are some interesting facts about CST?
CST covers 20 US states fully or partially. Chicago and Houston are the two largest cities in the Central Time Zone.
Which cities are in the KST timezone?
Major cities in the KST timezone include Seoul, Busan, Incheon, Daegu, Daejeon, Pyongyang.
What is the UTC offset for KST?
Korea Standard Time (KST) is at UTC+09:00.
What should I know about the KST timezone?
South Korea does not observe daylight saving time. Seoul is home to Samsung, LG, and Hyundai headquarters.
When is it midnight in Chicago, what time is it in South Korea?
When it is 12:00 AM (midnight) in Chicago (CST), it is +14h later in South Korea (KST).
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