Vietnam to South Korea
+2hVietnam
ICTSOURCESouth Korea
KSTGreen rows indicate typical business hours (9 AM - 5 PM)
ICT and KST on the World Map
The map below highlights the ICT (Indochina Time) and KST (Korea Standard Time) timezone regions across the globe.
ICT – Indochina Time
UTC+07:00Indochina Time (ICT) is the time zone for Vietnam, Thailand, Laos, and Cambodia, 7 hours ahead of UTC.
- •Bangkok is one of the most visited cities in the world.
- •ICT is 12 hours ahead of EST.
- •Thailand, Vietnam, and Cambodia all share ICT.
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).
Time Conversion Guide: Vietnam to South Korea
Vietnam runs on Indochina Time (ICT) at UTC+07:00. South Korea runs on Korean Standard Time (KST) at UTC+09:00. That puts Vietnam 2 hours ahead of South Korea — a difference of +2h at the current offsets.
In practice, when it is 9:00 AM in Vietnam it is 11:00 AM in South Korea. Midnight in Vietnam is 2:00 AM in South Korea. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Vietnam to South Korea time conversion table
| Vietnam (ICT) | South Korea (KST) | Day |
|---|---|---|
| 12:00 AM | 2:00 AM | same day |
| 6:00 AM | 8:00 AM | same day |
| 7:00 AM | 9:00 AM | same day |
| 8:00 AM | 10:00 AM | same day |
| 9:00 AM | 11:00 AM | same day |
| 12:00 PM | 2:00 PM | same day |
| 3:00 PM | 5:00 PM | same day |
| 5:00 PM | 7:00 PM | same day |
| 6:00 PM | 8:00 PM | same day |
| 9:00 PM | 11:00 PM | same day |
Why people convert Vietnam to South Korea time
- Scheduling a call from Vietnam to South Korea: a 10:00 AM start in Vietnam lands at 12:00 PM in South Korea, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Vietnam and South Korea are inside the 9-to-5 working day between 9:00 AM and 3:00 PM ICT time (11:00 AM–5:00 PM KST). That is roughly 6 hours of usable overlap.
- Coordinating a Vietnam-based team with South Korea 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 ICT" is unambiguous; "3 PM" across a +2h gap is not.
- Block 9:00 AM–3:00 PM ICT as the recurring meeting window if you work primarily from Vietnam and need South Korea colleagues present.
About ICT (Indochina Time)
Indochina Time (ICT) is used across Southeast Asia including Vietnam, Thailand, Laos, and Cambodia. Indonesia (Western time, WIB) also uses UTC+07:00. ICT does not observe daylight saving time.
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 Vietnam and South Korea
Both Vietnam and South Korea sit inside the 9 AM – 5 PM working day between 9:00 AM–3:00 PM ICT, which is 11:00 AM–5:00 PM KST. That gives roughly 6 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
Vietnam and South Korea share 6 hours of working-hours overlap (9:00 AM–3:00 PM ICT), so scheduling a live meeting is straightforward.
Vietnam is 2 hours ahead of South Korea (ICT UTC+07:00 → KST UTC+09:00). The shared working window is 9:00 AM–3:00 PM ICT. 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 Vietnam and South Korea?
Vietnam (ICT, UTC+07:00) is 2 hours ahead of South Korea (KST, UTC+09:00). The gap is currently +2h.
How do I convert Vietnam time to South Korea time?
Add +2h to Vietnam local time. For example, 9:00 AM in Vietnam is 11:00 AM in South Korea.
What time is it in South Korea right now?
South Korea 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 +2h offset from Vietnam.
What is the best time to call South Korea from Vietnam?
Call between 9:00 AM and 3:00 PM ICT — that maps to 11:00 AM–5:00 PM KST and keeps both parties inside the working day.
Which is ahead, Vietnam or South Korea?
Vietnam is 2 hours ahead of South Korea. When it is 12:00 PM in Vietnam it is 2:00 PM in South Korea.
Do Vietnam and South Korea use different time zones?
Vietnam (Vietnam) uses ICT at UTC+07:00, while South Korea (South Korea) uses KST at UTC+09:00. The IANA identifiers are Asia/Ho_Chi_Minh and Asia/Seoul.
Does daylight saving time affect the Vietnam–South Korea difference?
Neither zone observes daylight saving time, so the +2h offset between Vietnam and South Korea is fixed all year.
Which other cities share Vietnam's time zone?
ICT also covers Bangkok, Ho Chi Minh City, Hanoi, Jakarta, Phnom Penh, Vientiane.
Which countries use ICT, Vietnam's zone?
ICT is used in Thailand, Vietnam, Cambodia, Laos, Indonesia (WIB).
Is there a day difference between Vietnam and South Korea?
Not normally. The +2h gap only pushes the date over for late-evening times.
What is the time difference between Vietnam and South Korea?
South Korea is +2h from Vietnam.
What timezone is Vietnam in?
Vietnam operates on its local timezone.
What timezone is South Korea in?
South Korea operates on its local timezone.
Which countries use ICT (Indochina Time)?
ICT is used in Thailand, Vietnam, Cambodia, Laos, Indonesia (WIB).
Does ICT observe daylight saving time?
No, ICT does not observe daylight saving time and remains at UTC+07:00 year-round.
What are some interesting facts about ICT?
Bangkok is one of the most visited cities in the world. ICT is 12 hours ahead of EST.
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 Vietnam, what time is it in South Korea?
When it is 12:00 AM (midnight) in Vietnam (ICT), it is +2h later in South Korea (KST).
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