Seoul to Indonesia
-2hSeoul
KSTSOURCEIndonesia
WIBGreen rows indicate typical business hours (9 AM - 5 PM)
KST and WIB on the World Map
The map below highlights the KST (Korea Standard Time) and WIB (Western Indonesia 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).
WIB – Western Indonesia Time
UTC+07:00Western Indonesia Time (WIB, UTC+07:00) covers Java, Sumatra and West Kalimantan, including Jakarta.
- •Indonesia spans three time zones: WIB (UTC+07:00), WITA (UTC+08:00) and WIT (UTC+09:00).
- •Indonesia has not observed daylight saving time since 1964.
- •Jakarta is the largest city in Southeast Asia by population.
- •WIB shares the UTC+07:00 offset with Indochina Time.
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.
Seoul vs Indonesia: Offsets, DST and Best Call Times
Seoul runs on Korean Standard Time (KST) at UTC+09:00. Indonesia runs on Western Indonesia Time (WIB) at UTC+07:00. That puts Seoul 2 hours behind Indonesia — a difference of -2h at the current offsets.
In practice, when it is 9:00 AM in Seoul it is 7:00 AM in Indonesia. Midnight in Seoul is 10:00 PM in Indonesia. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Seoul to Indonesia time conversion table
| Seoul (KST) | Indonesia (WIB) | Day |
|---|---|---|
| 12:00 AM | 10:00 PM | previous day |
| 6:00 AM | 4:00 AM | same day |
| 7:00 AM | 5:00 AM | same day |
| 8:00 AM | 6:00 AM | same day |
| 9:00 AM | 7:00 AM | same day |
| 12:00 PM | 10:00 AM | same day |
| 3:00 PM | 1:00 PM | same day |
| 5:00 PM | 3:00 PM | same day |
| 6:00 PM | 4:00 PM | same day |
| 9:00 PM | 7:00 PM | same day |
Why people convert Seoul to Indonesia time
- Scheduling a call from Seoul to Indonesia: a 10:00 AM start in Seoul lands at 8:00 AM in Indonesia, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Seoul and Indonesia are inside the 9-to-5 working day between 11:00 AM and 5:00 PM KST time (9:00 AM–3:00 PM WIB). That is roughly 6 hours of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in Seoul is 6:00 PM in Indonesia makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM KST" is unambiguous; "3 PM" across a -2h gap is not.
- Block 11:00 AM–5:00 PM KST as the recurring meeting window if you work primarily from Seoul and need Indonesia 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 WIB (Western Indonesia Time)
Western Indonesia Time (WIB, Waktu Indonesia Barat) is one of Indonesia's three time zones, fixed at UTC+07:00 all year. It covers Java, Sumatra, West Kalimantan and the provinces around them — home to Jakarta, the country's capital and largest city, plus Surabaya and Bandung. Indonesia does not observe daylight saving time, so WIB never shifts. WIB shares its UTC+07:00 offset with Indochina Time (ICT) and Christmas Island Time, but is a distinct zone covering the western half of the Indonesian archipelago. The country's other zones are WITA (UTC+08:00) in the centre and WIT (UTC+09:00) in the east.
Best time to call between Seoul and Indonesia
Both Seoul and Indonesia sit inside the 9 AM – 5 PM working day between 11:00 AM–5:00 PM KST, which is 9:00 AM–3:00 PM WIB. That gives roughly 6 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
Seoul and Indonesia share 6 hours of working-hours overlap (11:00 AM–5:00 PM KST), so scheduling a live meeting is straightforward.
Seoul is 2 hours behind Indonesia (KST UTC+09:00 → WIB UTC+07:00). The shared working window is 11:00 AM–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 Indonesia?
Seoul (KST, UTC+09:00) is 2 hours behind Indonesia (WIB, UTC+07:00). The gap is currently -2h.
How do I convert Seoul time to Indonesia time?
Add -2h to Seoul local time. For example, 9:00 AM in Seoul is 7:00 AM in Indonesia.
What time is it in Indonesia right now?
Indonesia uses WIB at UTC+07:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -2h offset from Seoul.
What is the best time to call Indonesia from Seoul?
Call between 11:00 AM and 5:00 PM KST — that maps to 9:00 AM–3:00 PM WIB and keeps both parties inside the working day.
Which is behind, Seoul or Indonesia?
Seoul is 2 hours behind Indonesia. When it is 12:00 PM in Seoul it is 10:00 AM in Indonesia.
Do Seoul and Indonesia use different time zones?
Seoul (South Korea) uses KST at UTC+09:00, while Indonesia (Indonesia) uses WIB at UTC+07:00. The IANA identifiers are Asia/Seoul and Asia/Jakarta.
Does daylight saving time affect the Seoul–Indonesia difference?
Neither zone observes daylight saving time, so the -2h offset between Seoul and Indonesia 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 Indonesia?
Not normally. The -2h gap only pushes the date over the previous day.
What is the time difference between Seoul and Indonesia?
Indonesia is -2h 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 Indonesia in?
Indonesia 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 WIB timezone?
Major cities in the WIB timezone include Jakarta, Surabaya, Bandung, Medan, Palembang.
What is the UTC offset for WIB?
Western Indonesia Time (WIB) is at UTC+07:00.
What should I know about the WIB timezone?
Indonesia spans three time zones: WIB (UTC+07:00), WITA (UTC+08:00) and WIT (UTC+09:00). Indonesia has not observed daylight saving time since 1964.
When is it midnight in Seoul, what time is it in Indonesia?
When it is 12:00 AM (midnight) in Seoul (KST), it is -2h later in Indonesia (WIB).
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