Vietnam to Sydney
+3hVietnam
ICTSOURCESydney
AESTGreen rows indicate typical business hours (9 AM - 5 PM)
ICT and AEST on the World Map
The map below highlights the ICT (Indochina Time) and AEST (Australian Eastern 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.
AEST – Australian Eastern Standard Time
UTC+10:00Australian Eastern Standard Time (AEST) covers eastern Australia, 10 hours ahead of UTC.
- •Queensland does not observe daylight saving time, staying on AEST year-round.
- •Sydney and Melbourne switch to AEDT (UTC+11:00) in summer.
- •The Australian Securities Exchange (ASX) operates on AEST/AEDT.
- •AEST is 15 hours ahead of EST during winter.
About Sydney
WikipediaSydney operates on Australian Eastern Standard Time (AEST/AEDT). As Australia's financial capital, Sydney opens global markets at the start of the business day.
Sydney is one of the first major cities to welcome the New Year.
Vietnam vs Sydney: Offsets, DST and Best Call Times
Vietnam runs on Indochina Time (ICT) at UTC+07:00. Sydney runs on Australian Eastern Standard Time (AEST) at UTC+10:00. That puts Vietnam 3 hours ahead of Sydney — a difference of +3h at the current offsets.
In practice, when it is 9:00 AM in Vietnam it is 12:00 PM in Sydney. Midnight in Vietnam is 3:00 AM in Sydney. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Vietnam to Sydney time conversion table
| Vietnam (ICT) | Sydney (AEST) | Day |
|---|---|---|
| 12:00 AM | 3:00 AM | same day |
| 6:00 AM | 9:00 AM | same day |
| 7:00 AM | 10:00 AM | same day |
| 8:00 AM | 11:00 AM | same day |
| 9:00 AM | 12:00 PM | same day |
| 12:00 PM | 3:00 PM | same day |
| 3:00 PM | 6:00 PM | same day |
| 5:00 PM | 8:00 PM | same day |
| 6:00 PM | 9:00 PM | same day |
| 9:00 PM | 12:00 AM | next day |
Why people convert Vietnam to Sydney time
- Scheduling a call from Vietnam to Sydney: a 10:00 AM start in Vietnam lands at 1:00 PM in Sydney, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Vietnam and Sydney are inside the 9-to-5 working day between 9:00 AM and 2:00 PM ICT time (12:00 PM–5:00 PM AEST). That is roughly 5 hours of usable overlap.
- Watching a live event or market open: Vietnam viewers need 12:00 PM in Sydney to catch a 9:00 AM start there, and 9:00 PM if the event is anchored to Vietnam.
- Always state the zone abbreviation, not just the hour. "3:00 PM ICT" is unambiguous; "3 PM" across a +3h gap is not.
- Block 9:00 AM–2:00 PM ICT as the recurring meeting window if you work primarily from Vietnam and need Sydney colleagues present.
- Sydney: Clocks spring forward on Sat, Oct 3, 2026. Any meeting series spanning that date will shift by an hour in local time.
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 AEST (Australian Eastern Standard Time)
Australian Eastern Standard Time (AEST) is used in the eastern states of Australia including New South Wales, Victoria, Queensland, Tasmania, and the ACT. During summer (October to April), NSW, VIC, TAS, and ACT switch to Australian Eastern Daylight Time (AEDT, UTC+11:00), while Queensland remains on AEST year-round.
Best time to call between Vietnam and Sydney
Both Vietnam and Sydney sit inside the 9 AM – 5 PM working day between 9:00 AM–2:00 PM ICT, which is 12:00 PM–5:00 PM AEST. That gives roughly 5 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
Vietnam and Sydney share 5 hours of working-hours overlap (9:00 AM–2:00 PM ICT), so scheduling a live meeting is straightforward.
Vietnam is 3 hours ahead of Sydney (ICT UTC+07:00 → AEST UTC+10:00). The shared working window is 9:00 AM–2:00 PM ICT. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
Vietnam
Does not observe DST
Sydney
❄ Currently in Standard Time
Standard: UTC+10:00 · DST: UTC+11:00
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 Vietnam and Sydney?
Vietnam (ICT, UTC+07:00) is 3 hours ahead of Sydney (AEST, UTC+10:00). The gap is currently +3h.
How do I convert Vietnam time to Sydney time?
Add +3h to Vietnam local time. For example, 9:00 AM in Vietnam is 12:00 PM in Sydney.
What time is it in Sydney right now?
Sydney uses AEST at UTC+10:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +3h offset from Vietnam.
What is the best time to call Sydney from Vietnam?
Call between 9:00 AM and 2:00 PM ICT — that maps to 12:00 PM–5:00 PM AEST and keeps both parties inside the working day.
Which is ahead, Vietnam or Sydney?
Vietnam is 3 hours ahead of Sydney. When it is 12:00 PM in Vietnam it is 3:00 PM in Sydney.
Do Vietnam and Sydney use different time zones?
Vietnam (Vietnam) uses ICT at UTC+07:00, while Sydney (Australia) uses AEST at UTC+10:00. The IANA identifiers are Asia/Ho_Chi_Minh and Australia/Sydney.
Does daylight saving time affect the Vietnam–Sydney difference?
Neither zone observes daylight saving time, so the +3h offset between Vietnam and Sydney 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 Sydney?
Not normally. The +3h gap only pushes the date over for late-evening times.
What is the time difference between Vietnam and Sydney?
Sydney is +3h from Vietnam.
What timezone is Vietnam in?
Vietnam operates on its local timezone.
What timezone is Sydney in?
Sydney operates on Australian Eastern Standard Time (AEST/AEDT). As Australia's financial capital, Sydney opens global markets at the start of the business day.
What are the business hours in Sydney?
Standard business hours in Sydney are 9:00 AM - 5:00 PM AEST.
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 AEST timezone?
Major cities in the AEST timezone include Sydney, Melbourne, Brisbane, Canberra, Hobart, Gold Coast.
What is the UTC offset for AEST?
Australian Eastern Standard Time (AEST) is at UTC+10:00. During daylight saving time, it shifts to AEDT.
What should I know about the AEST timezone?
Queensland does not observe daylight saving time, staying on AEST year-round. Sydney and Melbourne switch to AEDT (UTC+11:00) in summer.
When is it midnight in Vietnam, what time is it in Sydney?
When it is 12:00 AM (midnight) in Vietnam (ICT), it is +3h later in Sydney (AEST).
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