Ho Chi Minh to ACST
+2h 30mHo Chi Minh
ICTSOURCEACST
ACSTGreen rows indicate typical business hours (9 AM - 5 PM)
ICT and ACST on the World Map
The map below highlights the ICT (Indochina Time) and ACST (Australian Central 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.
ACST – Australian Central Standard Time
UTC+09:30Australian Central Standard Time (ACST, UTC+09:30) covers South Australia and the Northern Territory, on a half-hour offset.
- •ACST uses a half-hour offset: UTC+09:30.
- •South Australia moves to ACDT (UTC+10:30) in summer; the Northern Territory does not.
- •Adelaide and Darwin are 30 minutes apart during daylight saving, level in winter.
- •Adelaide is one of the few major cities on a 30-minute offset.
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.
Understanding the +2h 30m Gap: Ho Chi Minh vs ACST
Ho Chi Minh runs on Indochina Time (ICT) at UTC+07:00. ACST runs on Australian Central Standard Time (ACST) at UTC+09:30. That puts Ho Chi Minh 2 hours 30 minutes ahead of ACST — a difference of +2h 30m at the current offsets.
In practice, when it is 9:00 AM in Ho Chi Minh it is 11:30 AM in ACST. Midnight in Ho Chi Minh is 2:30 AM in ACST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Ho Chi Minh to ACST time conversion table
| Ho Chi Minh (ICT) | ACST (ACST) | Day |
|---|---|---|
| 12:00 AM | 2:30 AM | same day |
| 6:00 AM | 8:30 AM | same day |
| 7:00 AM | 9:30 AM | same day |
| 8:00 AM | 10:30 AM | same day |
| 9:00 AM | 11:30 AM | same day |
| 12:00 PM | 2:30 PM | same day |
| 3:00 PM | 5:30 PM | same day |
| 5:00 PM | 7:30 PM | same day |
| 6:00 PM | 8:30 PM | same day |
| 9:00 PM | 11:30 PM | same day |
Why people convert Ho Chi Minh to ACST time
- Scheduling a call from Ho Chi Minh to ACST: a 10:00 AM start in Ho Chi Minh lands at 12:30 PM in ACST, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Ho Chi Minh and ACST are inside the 9-to-5 working day between 9:00 AM and 2:30 PM ICT time (11:30 AM–5:00 PM ACST). That is roughly 5 hours 30 minutes of usable overlap.
- Booking travel or deliveries: tracking ACST local time against Ho Chi Minh keeps pickup windows and arrival estimates honest across the +2h 30m offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM ICT" is unambiguous; "3 PM" across a +2h 30m gap is not.
- Block 9:00 AM–2:30 PM ICT as the recurring meeting window if you work primarily from Ho Chi Minh and need ACST 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 ACST (Australian Central Standard Time)
Australian Central Standard Time (ACST) is the half-hour offset of UTC+09:30 used across South Australia and the Northern Territory, taking in Adelaide and Darwin. South Australia moves to Australian Central Daylight Time (ACDT, UTC+10:30) from the first Sunday in October to the first Sunday in April, but the Northern Territory does not observe daylight saving — so Adelaide and Darwin sit 30 minutes apart in summer and level with each other in winter. The half-hour offset means Adelaide is 30 minutes behind Sydney in winter and level with it during daylight saving, which regularly catches out travellers and meeting planners.
Best time to call between Ho Chi Minh and ACST
Both Ho Chi Minh and ACST sit inside the 9 AM – 5 PM working day between 9:00 AM–2:30 PM ICT, which is 11:30 AM–5:00 PM ACST. That gives roughly 5 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
Ho Chi Minh and ACST share 5 hours of working-hours overlap (9:00 AM–2:30 PM ICT), so scheduling a live meeting is straightforward.
Ho Chi Minh is 2 hours 30 minutes ahead of ACST (ICT UTC+07:00 → ACST UTC+09:30). The shared working window is 9:00 AM–2:30 PM ICT. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
Ho Chi Minh
Does not observe DST
ACST
❄ Currently in Standard Time
Standard: UTC+09:30 · DST: UTC+10:30
Clocks spring forward on Sat, Oct 3, 2026
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 Ho Chi Minh and ACST?
Ho Chi Minh (ICT, UTC+07:00) is 2 hours 30 minutes ahead of ACST (ACST, UTC+09:30). The gap is currently +2h 30m.
How do I convert Ho Chi Minh time to ACST time?
Add +2h 30m to Ho Chi Minh local time. For example, 9:00 AM in Ho Chi Minh is 11:30 AM in ACST.
What time is it in ACST right now?
ACST uses ACST at UTC+09:30. Use the live converter at the top of this page — it updates in real time and already accounts for the +2h 30m offset from Ho Chi Minh.
What is the best time to call ACST from Ho Chi Minh?
Call between 9:00 AM and 2:30 PM ICT — that maps to 11:30 AM–5:00 PM ACST and keeps both parties inside the working day.
Which is ahead, Ho Chi Minh or ACST?
Ho Chi Minh is 2 hours 30 minutes ahead of ACST. When it is 12:00 PM in Ho Chi Minh it is 2:30 PM in ACST.
Do Ho Chi Minh and ACST use different time zones?
Ho Chi Minh (Vietnam) uses ICT at UTC+07:00, while ACST uses ACST at UTC+09:30. The IANA identifiers are Asia/Ho_Chi_Minh and Australia/Adelaide.
Does daylight saving time affect the Ho Chi Minh–ACST difference?
Neither zone observes daylight saving time, so the +2h 30m offset between Ho Chi Minh and ACST is fixed all year.
Which other cities share Ho Chi Minh's time zone?
ICT also covers Bangkok, Ho Chi Minh City, Hanoi, Jakarta, Phnom Penh, Vientiane.
Which countries use ICT, Ho Chi Minh's zone?
ICT is used in Thailand, Vietnam, Cambodia, Laos, Indonesia (WIB).
Is there a day difference between Ho Chi Minh and ACST?
Not normally. The +2h 30m gap only pushes the date over for late-evening times.
What is the time difference between Ho Chi Minh and ACST?
ACST is +2h 30m from Ho Chi Minh.
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 timezone is ACST in?
ACST operates on its local timezone.
What are the business hours in Ho Chi Minh?
Standard business hours in Ho Chi Minh are 8:00 AM - 5:00 PM ICT.
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 ACST timezone?
Major cities in the ACST timezone include Adelaide, Darwin, Alice Springs, Mount Gambier.
What is the UTC offset for ACST?
Australian Central Standard Time (ACST) is at UTC+09:30. During daylight saving time, it shifts to ACDT.
What should I know about the ACST timezone?
ACST uses a half-hour offset: UTC+09:30. South Australia moves to ACDT (UTC+10:30) in summer; the Northern Territory does not.
When is it midnight in Ho Chi Minh, what time is it in ACST?
When it is 12:00 AM (midnight) in Ho Chi Minh (ICT), it is +2h 30m later in ACST (ACST).
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