Seoul to Johannesburg
-7hSeoul
KSTSOURCEJohannesburg
SASTGreen rows indicate typical business hours (9 AM - 5 PM)
KST and SAST on the World Map
The map below highlights the KST (Korea Standard Time) and SAST (South Africa 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).
SAST – South Africa Standard Time
UTC+02:00South Africa Standard Time (SAST) is the time zone for South Africa and neighboring countries, 2 hours ahead of UTC.
- •South Africa does not observe daylight saving time.
- •SAST is the same offset as EET and Israel Standard Time.
- •The Johannesburg Stock Exchange (JSE) is Africa's largest.
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.
About Johannesburg
WikipediaJohannesburg operates on South Africa Time (SAST), UTC+2. As Africa's largest economy hub and home to the JSE, Johannesburg drives African financial markets.
Johannesburg is built on the world's largest gold deposit.
Seoul vs Johannesburg: Offsets, DST and Best Call Times
Seoul runs on Korean Standard Time (KST) at UTC+09:00. Johannesburg runs on South Africa Standard Time (SAST) at UTC+02:00. That puts Seoul 7 hours behind Johannesburg — a difference of -7h at the current offsets.
In practice, when it is 9:00 AM in Seoul it is 2:00 AM in Johannesburg. Midnight in Seoul is 5:00 PM in Johannesburg. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Seoul to Johannesburg time conversion table
| Seoul (KST) | Johannesburg (SAST) | Day |
|---|---|---|
| 12:00 AM | 5:00 PM | previous day |
| 6:00 AM | 11:00 PM | previous day |
| 7:00 AM | 12:00 AM | same day |
| 8:00 AM | 1:00 AM | same day |
| 9:00 AM | 2:00 AM | same day |
| 12:00 PM | 5:00 AM | same day |
| 3:00 PM | 8:00 AM | same day |
| 5:00 PM | 10:00 AM | same day |
| 6:00 PM | 11:00 AM | same day |
| 9:00 PM | 2:00 PM | same day |
Why people convert Seoul to Johannesburg time
- Scheduling a call from Seoul to Johannesburg: a 10:00 AM start in Seoul lands at 3:00 AM in Johannesburg, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Seoul and Johannesburg are inside the 9-to-5 working day between 4:00 PM and 5:00 PM KST time (9:00 AM–10:00 AM SAST). That is roughly 1 hours of usable overlap.
- Watching a live event or market open: Seoul viewers need 2:00 AM in Johannesburg to catch a 9:00 AM start there, and 7:00 AM if the event is anchored to Seoul.
- Always state the zone abbreviation, not just the hour. "3:00 PM KST" is unambiguous; "3 PM" across a -7h gap is not.
- Block 4:00 PM–5:00 PM KST as the recurring meeting window if you work primarily from Seoul and need Johannesburg colleagues present.
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 SAST (South Africa Standard Time)
South Africa Standard Time (SAST) is used in South Africa, Lesotho, and Eswatini. SAST does not observe daylight saving time. Johannesburg and Cape Town are major economic hubs in Africa.
Best time to call between Seoul and Johannesburg
Both Seoul and Johannesburg sit inside the 9 AM – 5 PM working day between 4:00 PM–5:00 PM KST, which is 9:00 AM–10:00 AM SAST. That gives roughly 1 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
Seoul and Johannesburg overlap for only 60 minutes (4:00 PM–5:00 PM KST), so meetings have to be booked precisely.
Seoul is 7 hours behind Johannesburg (KST UTC+09:00 → SAST UTC+02:00). The shared working window is 4:00 PM–5:00 PM KST. Remember to re-check around daylight-saving transitions.
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 Johannesburg?
Seoul (KST, UTC+09:00) is 7 hours behind Johannesburg (SAST, UTC+02:00). The gap is currently -7h.
How do I convert Seoul time to Johannesburg time?
Add -7h to Seoul local time. For example, 9:00 AM in Seoul is 2:00 AM in Johannesburg.
What time is it in Johannesburg right now?
Johannesburg uses SAST at UTC+02:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -7h offset from Seoul.
What is the best time to call Johannesburg from Seoul?
Call between 4:00 PM and 5:00 PM KST — that maps to 9:00 AM–10:00 AM SAST and keeps both parties inside the working day.
Which is behind, Seoul or Johannesburg?
Seoul is 7 hours behind Johannesburg. When it is 12:00 PM in Seoul it is 5:00 AM in Johannesburg.
Do Seoul and Johannesburg use different time zones?
Seoul (South Korea) uses KST at UTC+09:00, while Johannesburg (South Africa) uses SAST at UTC+02:00. The IANA identifiers are Asia/Seoul and Africa/Johannesburg.
Does daylight saving time affect the Seoul–Johannesburg difference?
Neither zone observes daylight saving time, so the -7h offset between Seoul and Johannesburg 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 Johannesburg?
Not normally. The -7h gap only pushes the date over the previous day.
What is the time difference between Seoul and Johannesburg?
Johannesburg is -7h 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 Johannesburg in?
Johannesburg operates on South Africa Time (SAST), UTC+2. As Africa's largest economy hub and home to the JSE, Johannesburg drives African financial markets.
What are the business hours in Seoul?
Standard business hours in Seoul are 9:00 AM - 6:00 PM KST.
What are the business hours in Johannesburg?
Standard business hours in Johannesburg are 8:00 AM - 5:00 PM SAST.
What is the best time to schedule a call between Seoul and Johannesburg?
The best overlap for a call is when both cities are in business hours. Seoul works 9:00 AM - 6:00 PM KST and Johannesburg works 8:00 AM - 5:00 PM SAST (-7h difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in Seoul and Johannesburg?
Seoul uses KRW (₩) while Johannesburg uses ZAR (R). Check current exchange rates when planning travel or business between these cities.
How do Seoul and Johannesburg compare in size?
Seoul has a population of approximately 9.7 million (metro: 25.5 million), while Johannesburg has approximately 5.8 million (metro: 10.5 million).
What are the major landmarks in Seoul and Johannesburg?
Seoul is known for Gyeongbokgung Palace, N Seoul Tower, Bukchon Hanok Village. Johannesburg is famous for Apartheid Museum, Constitution Hill, Gold Reef City.
Do Seoul and Johannesburg have stock exchanges?
Yes. Seoul has the KRX (Korea Exchange) and Johannesburg has the JSE (Johannesburg Stock Exchange). The -7h time difference affects trading hour overlaps between these exchanges.
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 SAST timezone?
Major cities in the SAST timezone include Johannesburg, Cape Town, Durban, Pretoria, Port Elizabeth.
What is the UTC offset for SAST?
South Africa Standard Time (SAST) is at UTC+02:00.
What should I know about the SAST timezone?
South Africa does not observe daylight saving time. SAST is the same offset as EET and Israel Standard Time.
When is it midnight in Seoul, what time is it in Johannesburg?
When it is 12:00 AM (midnight) in Seoul (KST), it is -7h later in Johannesburg (SAST).
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