Vietnam to Hong Kong
+1hVietnam
ICTSOURCEHong Kong
HKTGreen rows indicate typical business hours (9 AM - 5 PM)
ICT and HKT on the World Map
The map below highlights the ICT (Indochina Time) and HKT (Hong Kong 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.
HKT – Hong Kong Time
UTC+08:00Hong Kong Time (HKT, UTC+08:00) is the time zone for Hong Kong, 8 hours ahead of UTC.
- •Hong Kong does not observe daylight saving time and has kept UTC+08:00 since 1979.
- •HKT shares its offset with China Standard Time, Singapore Time and Philippine Time.
- •The Hong Kong Stock Exchange opens at 09:30 HKT.
- •Hong Kong Time does not change with the seasons, so its gap to other zones is fixed.
About Hong Kong
WikipediaHong Kong Time (HKT) is UTC+8 with no daylight saving. As a major financial gateway to China, Hong Kong trading hours overlap with European morning sessions.
The city has one of the world's most efficient and affordable public transit systems.
Time Conversion Guide: Vietnam to Hong Kong
Vietnam runs on Indochina Time (ICT) at UTC+07:00. Hong Kong runs on Hong Kong Standard Time (HKT) at UTC+08:00. That puts Vietnam 1 hour ahead of Hong Kong — a difference of +1h at the current offsets.
In practice, when it is 9:00 AM in Vietnam it is 10:00 AM in Hong Kong. Midnight in Vietnam is 1:00 AM in Hong Kong. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Vietnam to Hong Kong time conversion table
| Vietnam (ICT) | Hong Kong (HKT) | Day |
|---|---|---|
| 12:00 AM | 1:00 AM | same day |
| 6:00 AM | 7:00 AM | same day |
| 7:00 AM | 8:00 AM | same day |
| 8:00 AM | 9:00 AM | same day |
| 9:00 AM | 10:00 AM | same day |
| 12:00 PM | 1:00 PM | same day |
| 3:00 PM | 4:00 PM | same day |
| 5:00 PM | 6:00 PM | same day |
| 6:00 PM | 7:00 PM | same day |
| 9:00 PM | 10:00 PM | same day |
Why people convert Vietnam to Hong Kong time
- Scheduling a call from Vietnam to Hong Kong: a 10:00 AM start in Vietnam lands at 11:00 AM in Hong Kong, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Vietnam and Hong Kong are inside the 9-to-5 working day between 9:00 AM and 4:00 PM ICT time (10:00 AM–5:00 PM HKT). That is roughly 7 hours of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in Vietnam is 9:00 PM in Hong Kong makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM ICT" is unambiguous; "3 PM" across a +1h gap is not.
- Block 9:00 AM–4:00 PM ICT as the recurring meeting window if you work primarily from Vietnam and need Hong Kong 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 HKT (Hong Kong Time)
Hong Kong Time (HKT) is fixed at UTC+08:00 all year and does not observe daylight saving time. Hong Kong last used summer time in 1979 and has kept a single offset since. HKT shares the UTC+08:00 offset with China Standard Time, Singapore Time, Malaysian Time, Philippine Time and Australian Western Standard Time, but is listed separately because Hong Kong maintains its own timekeeping authority. As a major financial centre, Hong Kong's trading hours set the rhythm for markets across Asia, opening at 09:30 HKT which is 01:30 in London and 20:30 the previous evening in New York.
Best time to call between Vietnam and Hong Kong
Both Vietnam and Hong Kong sit inside the 9 AM – 5 PM working day between 9:00 AM–4:00 PM ICT, which is 10:00 AM–5:00 PM HKT. That gives roughly 7 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
Vietnam and Hong Kong share 7 hours of working-hours overlap (9:00 AM–4:00 PM ICT), so scheduling a live meeting is straightforward.
Vietnam is 1 hour ahead of Hong Kong (ICT UTC+07:00 → HKT UTC+08:00). The shared working window is 9:00 AM–4:00 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 Hong Kong?
Vietnam (ICT, UTC+07:00) is 1 hour ahead of Hong Kong (HKT, UTC+08:00). The gap is currently +1h.
How do I convert Vietnam time to Hong Kong time?
Add +1h to Vietnam local time. For example, 9:00 AM in Vietnam is 10:00 AM in Hong Kong.
What time is it in Hong Kong right now?
Hong Kong uses HKT at UTC+08:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +1h offset from Vietnam.
What is the best time to call Hong Kong from Vietnam?
Call between 9:00 AM and 4:00 PM ICT — that maps to 10:00 AM–5:00 PM HKT and keeps both parties inside the working day.
Which is ahead, Vietnam or Hong Kong?
Vietnam is 1 hour ahead of Hong Kong. When it is 12:00 PM in Vietnam it is 1:00 PM in Hong Kong.
Do Vietnam and Hong Kong use different time zones?
Vietnam (Vietnam) uses ICT at UTC+07:00, while Hong Kong (Hong Kong) uses HKT at UTC+08:00. The IANA identifiers are Asia/Ho_Chi_Minh and Asia/Hong_Kong.
Does daylight saving time affect the Vietnam–Hong Kong difference?
Neither zone observes daylight saving time, so the +1h offset between Vietnam and Hong Kong 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 Hong Kong?
Not normally. The +1h gap only pushes the date over for late-evening times.
What is the time difference between Vietnam and Hong Kong?
Hong Kong is +1h from Vietnam.
What timezone is Vietnam in?
Vietnam operates on its local timezone.
What timezone is Hong Kong in?
Hong Kong Time (HKT) is UTC+8 with no daylight saving. As a major financial gateway to China, Hong Kong trading hours overlap with European morning sessions.
What are the business hours in Hong Kong?
Standard business hours in Hong Kong are 9:00 AM - 6:00 PM HKT.
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 HKT timezone?
Major cities in the HKT timezone include Hong Kong, Kowloon, Tsuen Wan, Sha Tin.
What is the UTC offset for HKT?
Hong Kong Time (HKT) is at UTC+08:00.
What should I know about the HKT timezone?
Hong Kong does not observe daylight saving time and has kept UTC+08:00 since 1979. HKT shares its offset with China Standard Time, Singapore Time and Philippine Time.
When is it midnight in Vietnam, what time is it in Hong Kong?
When it is 12:00 AM (midnight) in Vietnam (ICT), it is +1h later in Hong Kong (HKT).
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