Honolulu to Ho Chi Minh
+17hHonolulu
HSTSOURCEHo Chi Minh
ICTGreen rows indicate typical business hours (9 AM - 5 PM)
HST and ICT on the World Map
The map below highlights the HST (Hawaii Standard Time) and ICT (Indochina Time) timezone regions across the globe.
HST – Hawaii Standard Time
UTC-10:00Hawaii Standard Time (HST) is the time zone for the Hawaiian Islands, 10 hours behind UTC.
- •Hawaii does not observe daylight saving time.
- •HST is 5 hours behind EST in winter and 6 hours behind EDT in summer.
- •Hawaii is one of only two US states that don't observe DST (the other is Arizona).
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.
About Honolulu
WikipediaHonolulu operates on Hawaii Standard Time (HST), UTC-10 with no daylight saving. Hawaii's consistent time makes it a predictable connection between Asia and mainland USA.
Pearl Harbor memorial receives over 2 million visitors annually.
About Ho Chi Minh
WikipediaHo Chi Minh City operates on Indochina Time (ICT), UTC+7. As Vietnam's economic powerhouse and a manufacturing hub, Saigon drives Southeast Asian trade.
The city has over 5 million motorbikes, outnumbering cars significantly.
Comparing Time Zones: Honolulu and Ho Chi Minh
Honolulu runs on Hawaii-Aleutian Standard Time (HST) at UTC-10:00. Ho Chi Minh runs on Indochina Time (ICT) at UTC+07:00. That puts Honolulu 17 hours ahead of Ho Chi Minh — a difference of +17h at the current offsets.
In practice, when it is 9:00 AM in Honolulu it is 2:00 AM in Ho Chi Minh on the next day. Midnight in Honolulu is 5:00 PM in Ho Chi Minh. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Honolulu to Ho Chi Minh time conversion table
| Honolulu (HST) | Ho Chi Minh (ICT) | Day |
|---|---|---|
| 12:00 AM | 5:00 PM | same day |
| 6:00 AM | 11:00 PM | same day |
| 7:00 AM | 12:00 AM | next day |
| 8:00 AM | 1:00 AM | next day |
| 9:00 AM | 2:00 AM | next day |
| 12:00 PM | 5:00 AM | next day |
| 3:00 PM | 8:00 AM | next day |
| 5:00 PM | 10:00 AM | next day |
| 6:00 PM | 11:00 AM | next day |
| 9:00 PM | 2:00 PM | next day |
Why people convert Honolulu to Ho Chi Minh time
- Scheduling a call from Honolulu to Ho Chi Minh: a 10:00 AM start in Honolulu lands at 3:00 AM in Ho Chi Minh the next day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +17h gap: Honolulu and Ho Chi Minh have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in Ho Chi Minh is 2:00 AM in Honolulu.
- Keeping family and friends in sync: knowing that 8:00 PM in Honolulu is 1:00 PM in Ho Chi Minh makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM HST" is unambiguous; "3 PM" across a +17h gap is not.
- With a +17h gap there is no shared 9-to-5 window, so alternate the early start: one week Honolulu takes the early slot, the next week Ho Chi Minh does.
About HST (Hawaii Standard Time)
Hawaii Standard Time (HST) is used in the state of Hawaii and does not observe daylight saving time. This makes HST one of the most consistent time zones in the US. The Hawaiian Islands are among the last places on Earth to see a new calendar day.
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 Honolulu and Ho Chi Minh
With a +17h offset there is no overlap inside a normal 9 AM – 5 PM day. Ho Chi Minh opens at 9:00 AM ICT, which is 2:00 AM in Honolulu, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
Honolulu and Ho Chi Minh have no shared working hours because of the +17h gap. Teams need to alternate early starts or rely on asynchronous handovers.
Honolulu is 17 hours ahead of Ho Chi Minh (HST UTC-10:00 → ICT UTC+07:00). There is no shared 9-to-5 window, so plan around an early or late slot. 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 Honolulu and Ho Chi Minh?
Honolulu (HST, UTC-10:00) is 17 hours ahead of Ho Chi Minh (ICT, UTC+07:00). The gap is currently +17h.
How do I convert Honolulu time to Ho Chi Minh time?
Add +17h to Honolulu local time. For example, 9:00 AM in Honolulu is 2:00 AM in Ho Chi Minh (next day).
What time is it in Ho Chi Minh right now?
Ho Chi Minh 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 +17h offset from Honolulu.
What is the best time to call Ho Chi Minh from Honolulu?
There is no shared working-hours window because of the +17h gap. The closest option is 1:00 PM in Honolulu, which is 6:00 AM in Ho Chi Minh.
Which is ahead, Honolulu or Ho Chi Minh?
Honolulu is 17 hours ahead of Ho Chi Minh. When it is 12:00 PM in Honolulu it is 5:00 AM in Ho Chi Minh.
Do Honolulu and Ho Chi Minh use different time zones?
Honolulu (USA) uses HST at UTC-10:00, while Ho Chi Minh (Vietnam) uses ICT at UTC+07:00. The IANA identifiers are Pacific/Honolulu and Asia/Ho_Chi_Minh.
Does daylight saving time affect the Honolulu–Ho Chi Minh difference?
Neither zone observes daylight saving time, so the +17h offset between Honolulu and Ho Chi Minh is fixed all year.
Which other cities share Honolulu's time zone?
HST also covers Honolulu, Hilo, Kailua, Pearl City, Kapolei.
Which countries use HST, Honolulu's zone?
HST is used in United States (Hawaii).
Is there a day difference between Honolulu and Ho Chi Minh?
Sometimes. The +17h gap is large enough that 8:00 PM or later in Honolulu already falls on the next day in Ho Chi Minh.
What is the time difference between Honolulu and Ho Chi Minh?
Ho Chi Minh is +17h from Honolulu.
What timezone is Honolulu in?
Honolulu operates on Hawaii Standard Time (HST), UTC-10 with no daylight saving. Hawaii's consistent time makes it a predictable connection between Asia and mainland USA.
What timezone is Ho Chi Minh in?
Ho Chi Minh City operates on Indochina Time (ICT), UTC+7. As Vietnam's economic powerhouse and a manufacturing hub, Saigon drives Southeast Asian trade.
What are the business hours in Honolulu?
Standard business hours in Honolulu are 8:00 AM - 5:00 PM HST.
What are the business hours in Ho Chi Minh?
Standard business hours in Ho Chi Minh are 8:00 AM - 5:00 PM ICT.
What is the best time to schedule a call between Honolulu and Ho Chi Minh?
The best overlap for a call is when both cities are in business hours. Honolulu works 8:00 AM - 5:00 PM HST and Ho Chi Minh works 8:00 AM - 5:00 PM ICT (+17h difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in Honolulu and Ho Chi Minh?
Honolulu uses USD ($) while Ho Chi Minh uses VND (₫). Check current exchange rates when planning travel or business between these cities.
How do Honolulu and Ho Chi Minh compare in size?
Honolulu has a population of approximately 350,000 (metro: 1 million), while Ho Chi Minh has approximately 9 million (metro: 13 million).
What are the major landmarks in Honolulu and Ho Chi Minh?
Honolulu is known for Waikiki Beach, Diamond Head, Pearl Harbor. Ho Chi Minh is famous for Notre-Dame Cathedral, War Remnants Museum, Ben Thanh Market.
Do Honolulu and Ho Chi Minh have stock exchanges?
Yes. Honolulu has the N/A (Uses NYSE/NASDAQ) and Ho Chi Minh has the HOSE (Ho Chi Minh Stock Exchange). The +17h time difference affects trading hour overlaps between these exchanges.
Which countries use HST (Hawaii Standard Time)?
HST is used in United States (Hawaii).
Does HST observe daylight saving time?
No, HST does not observe daylight saving time and remains at UTC-10:00 year-round.
What are some interesting facts about HST?
Hawaii does not observe daylight saving time. HST is 5 hours behind EST in winter and 6 hours behind EDT in summer.
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 Honolulu, what time is it in Ho Chi Minh?
When it is 12:00 AM (midnight) in Honolulu (HST), it is +17h later in Ho Chi Minh (ICT).
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