Seoul to CDT
-14hSeoul
KSTSOURCECDT
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 Daylight 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).
CDT – Central Daylight Time
UTC-05:00Central Daylight Time (CDT) is the daylight saving offset in the Central Time Zone, 5 hours behind UTC.
- •CDT is the same offset as EST (UTC-05:00), which can cause confusion.
- •CDT runs from the second Sunday in March to the first Sunday in November.
About Seoul
WikipediaSeoul operates on Korea Standard Time (KST), UTC+9, same as Japan. As a global tech and entertainment hub, Seoul coordinates with East Asian markets.
Seoul has the fastest average internet speed in the world.
Everything You Need to Know About Seoul and CDT Time
Seoul runs on Korean Standard Time (KST) at UTC+09:00. CDT runs on Central Daylight Time (CDT) at UTC-05:00. That puts Seoul 14 hours behind CDT — a difference of -14h at the current offsets.
In practice, when it is 9:00 AM in Seoul it is 7:00 PM in CDT on the previous day. Midnight in Seoul is 10:00 AM in CDT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Seoul to CDT time conversion table
| Seoul (KST) | CDT (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 Seoul to CDT time
- Scheduling a call from Seoul to CDT: a 10:00 AM start in Seoul lands at 8:00 PM in CDT the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -14h gap: Seoul and CDT 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 CDT is 7:00 PM in Seoul.
- Booking travel or deliveries: tracking CDT local time against Seoul keeps pickup windows and arrival estimates honest across the -14h offset.
- 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 Seoul takes the early slot, the next week CDT does.
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 CDT (Central Daylight Time)
Central Daylight Time (CDT) is observed during summer months in the US and Canadian portions of the Central Time Zone. Clocks are moved forward by one hour, aligning with Eastern Standard Time (EST). Most of Mexico and Central America do not observe CDT, staying on CST year-round.
Best time to call between Seoul and CDT
With a -14h offset there is no overlap inside a normal 9 AM – 5 PM day. CDT opens at 9:00 AM CDT, which is 7:00 PM in Seoul, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
Seoul and CDT have no shared working hours because of the -14h gap. Teams need to alternate early starts or rely on asynchronous handovers.
Seoul is 14 hours behind CDT (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
Seoul
Does not observe DST
CDT
☀ 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 Seoul and CDT?
Seoul (KST, UTC+09:00) is 14 hours behind CDT (CDT, UTC-05:00). The gap is currently -14h.
How do I convert Seoul time to CDT time?
Add -14h to Seoul local time. For example, 9:00 AM in Seoul is 7:00 PM in CDT (previous day).
What time is it in CDT right now?
CDT 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 Seoul.
What is the best time to call CDT from Seoul?
There is no shared working-hours window because of the -14h gap. The closest option is 1:00 PM in Seoul, which is 11:00 PM in CDT.
Which is behind, Seoul or CDT?
Seoul is 14 hours behind CDT. When it is 12:00 PM in Seoul it is 10:00 PM in CDT.
Do Seoul and CDT use different time zones?
Seoul (South Korea) uses KST at UTC+09:00, while CDT uses CDT at UTC-05:00. The IANA identifiers are Asia/Seoul and America/Chicago.
Does daylight saving time affect the Seoul–CDT difference?
Neither zone observes daylight saving time, so the -14h offset between Seoul and CDT is fixed all year.
Which other cities share Seoul's time zone?
KST also covers Seoul, Busan, Incheon, Daegu, Daejeon, Pyongyang.
Which countries use KST, Seoul's zone?
KST is used in South Korea, North Korea.
Is there a day difference between Seoul and CDT?
Sometimes. The -14h gap is large enough that 8:00 PM or later in Seoul already falls on the in CDT.
What is the time difference between Seoul and CDT?
CDT is -14h from Seoul.
What timezone is Seoul in?
Seoul operates on Korea Standard Time (KST), UTC+9, same as Japan. As a global tech and entertainment hub, Seoul coordinates with East Asian markets.
What timezone is CDT in?
CDT operates on its local timezone.
What are the business hours in Seoul?
Standard business hours in Seoul are 9:00 AM - 6:00 PM KST.
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 CDT timezone?
Major cities in the CDT timezone include Chicago, Houston, Dallas, Austin, Winnipeg, Nashville.
What is the UTC offset for CDT?
Central Daylight Time (CDT) is at UTC-05:00. During daylight saving time, it shifts to CST.
What should I know about the CDT timezone?
CDT is the same offset as EST (UTC-05:00), which can cause confusion. CDT runs from the second Sunday in March to the first Sunday in November.
When is it midnight in Seoul, what time is it in CDT?
When it is 12:00 AM (midnight) in Seoul (KST), it is -14h later in CDT (CDT).
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