CLT to Seoul
+13hCLT
CLTSOURCESeoul
KSTGreen rows indicate typical business hours (9 AM - 5 PM)
CLT and KST on the World Map
The map below highlights the CLT (Chile Standard Time) and KST (Korea Standard Time) timezone regions across the globe.
CLT – Chile Standard Time
UTC-04:00Chile Standard Time (CLT) is the time zone for continental Chile, 4 hours behind UTC.
- •Chile observes daylight saving time, switching to CLST (UTC-03:00) in summer.
- •Santiago is the largest city in Chile with over 6 million in the metro area.
- •Chile spans over 4,300 km from north to south but uses one timezone.
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 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 CLT and Seoul Time
CLT runs on Chile Standard Time (CLT) at UTC-04:00. Seoul runs on Korean Standard Time (KST) at UTC+09:00. That puts CLT 13 hours ahead of Seoul — a difference of +13h at the current offsets.
In practice, when it is 9:00 AM in CLT it is 10:00 PM in Seoul. Midnight in CLT is 1:00 PM in Seoul. Neither zone observes daylight saving time, so the offset between them stays constant all year.
CLT to Seoul time conversion table
| CLT (CLT) | Seoul (KST) | Day |
|---|---|---|
| 12:00 AM | 1:00 PM | same day |
| 6:00 AM | 7:00 PM | same day |
| 7:00 AM | 8:00 PM | same day |
| 8:00 AM | 9:00 PM | same day |
| 9:00 AM | 10:00 PM | same day |
| 12:00 PM | 1:00 AM | next day |
| 3:00 PM | 4:00 AM | next day |
| 5:00 PM | 6:00 AM | next day |
| 6:00 PM | 7:00 AM | next day |
| 9:00 PM | 10:00 AM | next day |
Why people convert CLT to Seoul time
- Scheduling a call from CLT to Seoul: a 10:00 AM start in CLT lands at 11:00 PM in Seoul, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +13h gap: CLT and Seoul 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 Seoul is 10:00 PM in CLT.
- Keeping family and friends in sync: knowing that 8:00 PM in CLT is 9:00 AM in Seoul makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM CLT" is unambiguous; "3 PM" across a +13h gap is not.
- With a +13h gap there is no shared 9-to-5 window, so alternate the early start: one week CLT takes the early slot, the next week Seoul does.
About CLT (Chile Standard Time)
Chile Standard Time (CLT) is the standard time in Chile. During summer months (October to March), Chile switches to Chile Summer Time (CLST, UTC-03:00). Chile is the longest north-south country in the world.
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 CLT and Seoul
With a +13h offset there is no overlap inside a normal 9 AM – 5 PM day. Seoul opens at 9:00 AM KST, which is 10:00 PM in CLT, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
CLT and Seoul have no shared working hours because of the +13h gap. Teams need to alternate early starts or rely on asynchronous handovers.
CLT is 13 hours ahead of Seoul (CLT UTC-04:00 → 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
CLT
☀ Currently in DST
Standard: UTC-04:00 · DST: UTC-03:00
Clocks fall back on Sun, Apr 4, 2027
Seoul
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 CLT and Seoul?
CLT (CLT, UTC-04:00) is 13 hours ahead of Seoul (KST, UTC+09:00). The gap is currently +13h.
How do I convert CLT time to Seoul time?
Add +13h to CLT local time. For example, 9:00 AM in CLT is 10:00 PM in Seoul.
What time is it in Seoul right now?
Seoul 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 +13h offset from CLT.
What is the best time to call Seoul from CLT?
There is no shared working-hours window because of the +13h gap. The closest option is 1:00 PM in CLT, which is 2:00 AM in Seoul.
Which is ahead, CLT or Seoul?
CLT is 13 hours ahead of Seoul. When it is 12:00 PM in CLT it is 1:00 AM in Seoul.
Do CLT and Seoul use different time zones?
CLT uses CLT at UTC-04:00, while Seoul (South Korea) uses KST at UTC+09:00. The IANA identifiers are America/Santiago and Asia/Seoul.
Does daylight saving time affect the CLT–Seoul difference?
Neither zone observes daylight saving time, so the +13h offset between CLT and Seoul is fixed all year.
Which other cities share CLT's time zone?
CLT also covers Santiago, Valparaíso, Concepción, Viña del Mar, Antofagasta.
Which countries use CLT, CLT's zone?
CLT is used in Chile.
Is there a day difference between CLT and Seoul?
Sometimes. The +13h gap is large enough that 8:00 PM or later in CLT already falls on the next day in Seoul.
What is the time difference between CLT and Seoul?
Seoul is +13h from CLT.
What timezone is CLT in?
CLT operates on its local timezone.
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 are the business hours in Seoul?
Standard business hours in Seoul are 9:00 AM - 6:00 PM KST.
Which countries use CLT (Chile Standard Time)?
CLT is used in Chile.
Does CLT observe daylight saving time?
Yes, CLT switches to CLST during summer months.
What are some interesting facts about CLT?
Chile observes daylight saving time, switching to CLST (UTC-03:00) in summer. Santiago is the largest city in Chile with over 6 million in the metro area.
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 CLT, what time is it in Seoul?
When it is 12:00 AM (midnight) in CLT (CLT), it is +13h later in Seoul (KST).
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