Does it handle Daylight Saving Time?

Yes, the tool automatically adjusts for Daylight Saving Time based on the specific date you select, ensuring accurate conversions year-round.

Can I add multiple cities?

Yes, you can add as many cities as you need to the dashboard to compare times across your entire global network simultaneously.

Vietnam to HKT

+1h

Vietnam

ICTSOURCE

UTC+07:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

HKT

UTC+08:00

HH01

MM00

13:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Vietnam

HKT

12:00 AM

1:00 AM

2:00 AM

3:00 AM

4:00 AM

5:00 AM

6:00 AM

7:00 AM

8:00 AM

9:00 AM

10:00 AM

11:00 AM

12:00 PM

1:00 PM

2:00 PM

3:00 PM

4:00 PM

5:00 PM

6:00 PM

7:00 PM

8:00 PM

9:00 PM

10:00 PM

11:00 PM

Green 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 Zone

→

HKT Zone

Explore all world timezones interactively →

ICT – Indochina Time

UTC+07:00

Indochina Time (ICT) is the time zone for Vietnam, Thailand, Laos, and Cambodia, 7 hours ahead of UTC.

Countries in ICT

ThailandVietnamCambodiaLaosIndonesia (WIB)

Major Cities in ICT

BangkokHo Chi Minh CityHanoiJakartaPhnom PenhVientiane

Key Facts about ICT

•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.

Daylight Saving:No – UTC+07:00 year-round

Learn more about ICT on Wikipedia

HKT – Hong Kong Time

UTC+08:00

Hong Kong Time (HKT, UTC+08:00) is the time zone for Hong Kong, 8 hours ahead of UTC.

Countries in HKT

Hong Kong SAR

Major Cities in HKT

Hong KongKowloonTsuen WanSha Tin

Key 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.
•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.

Daylight Saving:No – UTC+08:00 year-round

Learn more about HKT on Wikipedia

Comparing Time Zones: Vietnam and HKT

Vietnam runs on Indochina Time (ICT) at UTC+07:00. HKT runs on Hong Kong Time (HKT) at UTC+08:00. That puts Vietnam 1 hour ahead of HKT — a difference of +1h at the current offsets.

In practice, when it is 9:00 AM in Vietnam it is 10:00 AM in HKT. Midnight in Vietnam is 1:00 AM in HKT. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Vietnam to HKT time conversion table

Vietnam (ICT)	HKT (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 HKT time

Scheduling a call from Vietnam to HKT: a 10:00 AM start in Vietnam lands at 11:00 AM in HKT, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Vietnam and HKT 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.
Coordinating a Vietnam-based team with HKT 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 +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 HKT 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 HKT

Both Vietnam and HKT 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 HKT 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 HKT (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:

⏳

History of Timekeeping

From sundials to atomic clocks - 5000 years of measuring time

🌍

How Time Zones Work

UTC, offsets, and why zones don't follow straight lines

☀️

Daylight Saving Time

DST dates, which countries observe it, and the ongoing debate

Frequently Asked Questions

What is the time difference between Vietnam and HKT?

Vietnam (ICT, UTC+07:00) is 1 hour ahead of HKT (HKT, UTC+08:00). The gap is currently +1h.

How do I convert Vietnam time to HKT time?

Add +1h to Vietnam local time. For example, 9:00 AM in Vietnam is 10:00 AM in HKT.

What time is it in HKT right now?

HKT 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 HKT 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 HKT?

Vietnam is 1 hour ahead of HKT. When it is 12:00 PM in Vietnam it is 1:00 PM in HKT.

Do Vietnam and HKT use different time zones?

Vietnam (Vietnam) uses ICT at UTC+07:00, while HKT 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–HKT difference?

Neither zone observes daylight saving time, so the +1h offset between Vietnam and HKT 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 HKT?

Not normally. The +1h gap only pushes the date over for late-evening times.

What is the time difference between Vietnam and HKT?

HKT is +1h from Vietnam.

What timezone is Vietnam in?

Vietnam operates on its local timezone.

What timezone is HKT in?

HKT 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 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.