Инструменты Intosoft

Seoul to CLT

-13h

Seoul

KSTSOURCE
South Korea · UTC+09:00
HH12
:
MM00
  
12:00 (24-hr)
12 AM6 AM12 PM6 PM12 AM

CLT

CLT
UTC-03:00☀ DST active
HH11
:
MM00
  
(previous day)23:00 (24-hr)
12 AM6 AM12 PM6 PM12 AM
Seoul
CLT
12:00 AM
12:00 PM-1
2:00 AM
2:00 PM-1
4:00 AM
4:00 PM-1
6:00 AM
6:00 PM-1
8:00 AM
8:00 PM-1
10:00 AM
10:00 PM-1
12:00 PM
12:00 AM
2:00 PM
2:00 AM
4:00 PM
4:00 AM
6:00 PM
6:00 AM
8:00 PM
8:00 AM
10:00 PM
10:00 AM

Green rows indicate typical business hours (9 AM - 5 PM)

KST and CLT on the World Map

The map below highlights the KST (Korea Standard Time) and CLT (Chile Standard Time) timezone regions across the globe.

KSTCLTSeoulBusanIncheonDaeguSantiagoValparaísoConcepciónViña del Mar
KST Zone
→
CLT Zone

Explore all world timezones interactively →

KST – Korea Standard Time

UTC+09:00

Korea Standard Time (KST) is the time zone for South Korea, 9 hours ahead of UTC.

Countries in KST
South KoreaNorth Korea
Major Cities in KST
SeoulBusanIncheonDaeguDaejeonPyongyang
Key Facts about KST
  • •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).
Daylight Saving:No – UTC+09:00 year-round
Learn more about KST on Wikipedia

CLT – Chile Standard Time

UTC-04:00

Chile Standard Time (CLT) is the time zone for continental Chile, 4 hours behind UTC.

Countries in CLT
Chile
Major Cities in CLT
SantiagoValparaísoConcepciónViña del MarAntofagasta
Key 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.
  • •Chile spans over 4,300 km from north to south but uses one timezone.
Daylight Saving:Yes – switches to CLST
Learn more about CLT on Wikipedia

About Seoul

Wikipedia

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.

Population:9.7 million
Metro:25.5 million
Business Hours:9:00 AM - 6:00 PM KST
Currency:KRW (₩)
Stock Exchange:KRX (Korea Exchange)
Key Landmarks
Gyeongbokgung PalaceN Seoul TowerBukchon Hanok VillageDongdaemun Design PlazaCheonggyecheon Stream
Did You Know?

Seoul has the fastest average internet speed in the world.

Learn more about KST timezone →

Seoul to CLT Time Difference – Complete Guide

Seoul runs on Korean Standard Time (KST) at UTC+09:00. CLT runs on Chile Standard Time (CLT) at UTC-04:00. That puts Seoul 13 hours behind CLT — a difference of -13h at the current offsets.

In practice, when it is 9:00 AM in Seoul it is 8:00 PM in CLT on the previous day. Midnight in Seoul is 11:00 AM in CLT. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Seoul to CLT time conversion table

Seoul (KST)CLT (CLT)Day
12:00 AM11:00 AMprevious day
6:00 AM5:00 PMprevious day
7:00 AM6:00 PMprevious day
8:00 AM7:00 PMprevious day
9:00 AM8:00 PMprevious day
12:00 PM11:00 PMprevious day
3:00 PM2:00 AMsame day
5:00 PM4:00 AMsame day
6:00 PM5:00 AMsame day
9:00 PM8:00 AMsame day

Why people convert Seoul to CLT time

  • Scheduling a call from Seoul to CLT: a 10:00 AM start in Seoul lands at 9:00 PM in CLT the previous day, so you can confirm the slot without doing the arithmetic yourself.
  • Handling a -13h gap: Seoul and CLT 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 CLT is 8:00 PM in Seoul.
  • Coordinating a Seoul-based team with CLT contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.
  • Always state the zone abbreviation, not just the hour. "3:00 PM KST" 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 Seoul takes the early slot, the next week CLT 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 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.

Best time to call between Seoul and CLT

With a -13h offset there is no overlap inside a normal 9 AM – 5 PM day. CLT opens at 9:00 AM CLT, which is 8:00 PM in Seoul, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

Seoul and CLT have no shared working hours because of the -13h gap. Teams need to alternate early starts or rely on asynchronous handovers.

Seoul is 13 hours behind CLT (KST UTC+09:00 → CLT UTC-04:00). 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

CLT

☀ Currently in DST

Standard: UTC-04:00 · DST: UTC-03:00

Clocks fall back on Sun, Apr 4, 2027

Frequently Asked Questions

What is the time difference between Seoul and CLT?

Seoul (KST, UTC+09:00) is 13 hours behind CLT (CLT, UTC-04:00). The gap is currently -13h.

How do I convert Seoul time to CLT time?

Add -13h to Seoul local time. For example, 9:00 AM in Seoul is 8:00 PM in CLT (previous day).

What time is it in CLT right now?

CLT uses CLT at UTC-04:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -13h offset from Seoul.

What is the best time to call CLT from Seoul?

There is no shared working-hours window because of the -13h gap. The closest option is 1:00 PM in Seoul, which is 12:00 AM in CLT.

Which is behind, Seoul or CLT?

Seoul is 13 hours behind CLT. When it is 12:00 PM in Seoul it is 11:00 PM in CLT.

Do Seoul and CLT use different time zones?

Seoul (South Korea) uses KST at UTC+09:00, while CLT uses CLT at UTC-04:00. The IANA identifiers are Asia/Seoul and America/Santiago.

Does daylight saving time affect the Seoul–CLT difference?

Neither zone observes daylight saving time, so the -13h offset between Seoul and CLT 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 CLT?

Sometimes. The -13h gap is large enough that 8:00 PM or later in Seoul already falls on the in CLT.

What is the time difference between Seoul and CLT?

CLT is -13h 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 CLT in?

CLT 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 CLT timezone?

Major cities in the CLT timezone include Santiago, Valparaíso, Concepción, Viña del Mar, Antofagasta.

What is the UTC offset for CLT?

Chile Standard Time (CLT) is at UTC-04:00. During daylight saving time, it shifts to CLST.

What should I know about the CLT timezone?

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.

When is it midnight in Seoul, what time is it in CLT?

When it is 12:00 AM (midnight) in Seoul (KST), it is -13h later in CLT (CLT).