HKT to Vietnam
-1hHKT
HKTSOURCEVietnam
ICTGreen rows indicate typical business hours (9 AM - 5 PM)
HKT and ICT on the World Map
The map below highlights the HKT (Hong Kong Time) and ICT (Indochina Time) timezone regions across the globe.
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.
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.
Comparing Time Zones: HKT and Vietnam
HKT runs on Hong Kong Time (HKT) at UTC+08:00. Vietnam runs on Indochina Time (ICT) at UTC+07:00. That puts HKT 1 hour behind Vietnam — a difference of -1h at the current offsets.
In practice, when it is 9:00 AM in HKT it is 8:00 AM in Vietnam. Midnight in HKT is 11:00 PM in Vietnam. Neither zone observes daylight saving time, so the offset between them stays constant all year.
HKT to Vietnam time conversion table
| HKT (HKT) | Vietnam (ICT) | Day |
|---|---|---|
| 12:00 AM | 11:00 PM | previous day |
| 6:00 AM | 5:00 AM | same day |
| 7:00 AM | 6:00 AM | same day |
| 8:00 AM | 7:00 AM | same day |
| 9:00 AM | 8:00 AM | same day |
| 12:00 PM | 11:00 AM | same day |
| 3:00 PM | 2:00 PM | same day |
| 5:00 PM | 4:00 PM | same day |
| 6:00 PM | 5:00 PM | same day |
| 9:00 PM | 8:00 PM | same day |
Why people convert HKT to Vietnam time
- Scheduling a call from HKT to Vietnam: a 10:00 AM start in HKT lands at 9:00 AM in Vietnam, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both HKT and Vietnam are inside the 9-to-5 working day between 10:00 AM and 5:00 PM HKT time (9:00 AM–4:00 PM ICT). That is roughly 7 hours of usable overlap.
- Booking travel or deliveries: tracking Vietnam local time against HKT keeps pickup windows and arrival estimates honest across the -1h offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM HKT" is unambiguous; "3 PM" across a -1h gap is not.
- Block 10:00 AM–5:00 PM HKT as the recurring meeting window if you work primarily from HKT and need Vietnam colleagues present.
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.
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.
Best time to call between HKT and Vietnam
Both HKT and Vietnam sit inside the 9 AM – 5 PM working day between 10:00 AM–5:00 PM HKT, which is 9:00 AM–4:00 PM ICT. That gives roughly 7 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
HKT and Vietnam share 7 hours of working-hours overlap (10:00 AM–5:00 PM HKT), so scheduling a live meeting is straightforward.
HKT is 1 hour behind Vietnam (HKT UTC+08:00 → ICT UTC+07:00). The shared working window is 10:00 AM–5:00 PM HKT. 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 HKT and Vietnam?
HKT (HKT, UTC+08:00) is 1 hour behind Vietnam (ICT, UTC+07:00). The gap is currently -1h.
How do I convert HKT time to Vietnam time?
Add -1h to HKT local time. For example, 9:00 AM in HKT is 8:00 AM in Vietnam.
What time is it in Vietnam right now?
Vietnam uses ICT at UTC+07:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -1h offset from HKT.
What is the best time to call Vietnam from HKT?
Call between 10:00 AM and 5:00 PM HKT — that maps to 9:00 AM–4:00 PM ICT and keeps both parties inside the working day.
Which is behind, HKT or Vietnam?
HKT is 1 hour behind Vietnam. When it is 12:00 PM in HKT it is 11:00 AM in Vietnam.
Do HKT and Vietnam use different time zones?
HKT uses HKT at UTC+08:00, while Vietnam (Vietnam) uses ICT at UTC+07:00. The IANA identifiers are Asia/Hong_Kong and Asia/Ho_Chi_Minh.
Does daylight saving time affect the HKT–Vietnam difference?
Neither zone observes daylight saving time, so the -1h offset between HKT and Vietnam is fixed all year.
Which other cities share HKT's time zone?
HKT also covers Hong Kong, Kowloon, Tsuen Wan, Sha Tin.
Which countries use HKT, HKT's zone?
HKT is used in Hong Kong SAR.
Is there a day difference between HKT and Vietnam?
Not normally. The -1h gap only pushes the date over the previous day.
What is the time difference between HKT and Vietnam?
Vietnam is -1h from HKT.
What timezone is HKT in?
HKT operates on its local timezone.
What timezone is Vietnam in?
Vietnam operates on its local timezone.
Which countries use HKT (Hong Kong Time)?
HKT is used in Hong Kong SAR.
Does HKT observe daylight saving time?
No, HKT does not observe daylight saving time and remains at UTC+08:00 year-round.
What are some interesting facts about HKT?
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.
Which cities are in the ICT timezone?
Major cities in the ICT timezone include Bangkok, Ho Chi Minh City, Hanoi, Jakarta, Phnom Penh, Vientiane.
What is the UTC offset for ICT?
Indochina Time (ICT) is at UTC+07:00.
What should I know about the ICT timezone?
Bangkok is one of the most visited cities in the world. ICT is 12 hours ahead of EST.
When is it midnight in HKT, what time is it in Vietnam?
When it is 12:00 AM (midnight) in HKT (HKT), it is -1h later in Vietnam (ICT).
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See every conversion from HKT →·See every conversion from Vietnam →