Vietnam to Saudi Arabia
-4hVietnam
ICTSOURCESaudi Arabia
ASTGreen rows indicate typical business hours (9 AM - 5 PM)
ICT and AST on the World Map
The map below highlights the ICT (Indochina Time) and AST (Arabia 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.
AST – Arabia Standard Time
UTC+03:00Arabia Standard Time (AST, UTC+03:00) is the time zone for Saudi Arabia and the other Gulf states of the Arabian peninsula.
- •None of the Gulf states on Arabia Standard Time observe daylight saving.
- •AST is the same offset as Moscow Standard Time and East Africa Time.
- •Riyadh is one hour ahead of Central European Time in winter.
- •The AST abbreviation is shared with Atlantic Standard Time (UTC-04:00).
Comparing Time Zones: Vietnam and Saudi Arabia
Vietnam runs on Indochina Time (ICT) at UTC+07:00. Saudi Arabia runs on Arabian Standard Time (AST) at UTC+03:00. That puts Vietnam 4 hours behind Saudi Arabia — a difference of -4h at the current offsets.
In practice, when it is 9:00 AM in Vietnam it is 5:00 AM in Saudi Arabia. Midnight in Vietnam is 8:00 PM in Saudi Arabia. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Vietnam to Saudi Arabia time conversion table
| Vietnam (ICT) | Saudi Arabia (AST) | Day |
|---|---|---|
| 12:00 AM | 8:00 PM | previous day |
| 6:00 AM | 2:00 AM | same day |
| 7:00 AM | 3:00 AM | same day |
| 8:00 AM | 4:00 AM | same day |
| 9:00 AM | 5:00 AM | same day |
| 12:00 PM | 8:00 AM | same day |
| 3:00 PM | 11:00 AM | same day |
| 5:00 PM | 1:00 PM | same day |
| 6:00 PM | 2:00 PM | same day |
| 9:00 PM | 5:00 PM | same day |
Why people convert Vietnam to Saudi Arabia time
- Scheduling a call from Vietnam to Saudi Arabia: a 10:00 AM start in Vietnam lands at 6:00 AM in Saudi Arabia, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Vietnam and Saudi Arabia are inside the 9-to-5 working day between 1:00 PM and 5:00 PM ICT time (9:00 AM–1:00 PM AST). That is roughly 4 hours of usable overlap.
- Booking travel or deliveries: tracking Saudi Arabia local time against Vietnam keeps pickup windows and arrival estimates honest across the -4h offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM ICT" is unambiguous; "3 PM" across a -4h gap is not.
- Block 1:00 PM–5:00 PM ICT as the recurring meeting window if you work primarily from Vietnam and need Saudi Arabia 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 AST (Arabia Standard Time)
Arabia Standard Time (AST) is fixed at UTC+03:00 all year across Saudi Arabia, Qatar, Kuwait, Bahrain, Iraq and Yemen. None of these countries observes daylight saving time, so the offset never changes. The abbreviation collides with Atlantic Standard Time (UTC-04:00) used in eastern Canada and the Caribbean; this page covers the Arabian peninsula meaning. Arabia Standard Time is the same offset as Moscow Standard Time and East Africa Time, which makes scheduling with Europe straightforward — Riyadh is one hour ahead of Central European Time in winter and level with it during European summer time.
Best time to call between Vietnam and Saudi Arabia
Both Vietnam and Saudi Arabia sit inside the 9 AM – 5 PM working day between 1:00 PM–5:00 PM ICT, which is 9:00 AM–1:00 PM AST. That gives roughly 4 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
Vietnam and Saudi Arabia overlap for about 4 hours during the working day — enough for meetings if you avoid the edges of the window.
Vietnam is 4 hours behind Saudi Arabia (ICT UTC+07:00 → AST UTC+03:00). The shared working window is 1:00 PM–5:00 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:
Frequently Asked Questions
What is the time difference between Vietnam and Saudi Arabia?
Vietnam (ICT, UTC+07:00) is 4 hours behind Saudi Arabia (AST, UTC+03:00). The gap is currently -4h.
How do I convert Vietnam time to Saudi Arabia time?
Add -4h to Vietnam local time. For example, 9:00 AM in Vietnam is 5:00 AM in Saudi Arabia.
What time is it in Saudi Arabia right now?
Saudi Arabia uses AST at UTC+03:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -4h offset from Vietnam.
What is the best time to call Saudi Arabia from Vietnam?
Call between 1:00 PM and 5:00 PM ICT — that maps to 9:00 AM–1:00 PM AST and keeps both parties inside the working day.
Which is behind, Vietnam or Saudi Arabia?
Vietnam is 4 hours behind Saudi Arabia. When it is 12:00 PM in Vietnam it is 8:00 AM in Saudi Arabia.
Do Vietnam and Saudi Arabia use different time zones?
Vietnam (Vietnam) uses ICT at UTC+07:00, while Saudi Arabia (Saudi Arabia) uses AST at UTC+03:00. The IANA identifiers are Asia/Ho_Chi_Minh and Asia/Riyadh.
Does daylight saving time affect the Vietnam–Saudi Arabia difference?
Neither zone observes daylight saving time, so the -4h offset between Vietnam and Saudi Arabia 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 Saudi Arabia?
Not normally. The -4h gap only pushes the date over the previous day.
What is the time difference between Vietnam and Saudi Arabia?
Saudi Arabia is -4h from Vietnam.
What timezone is Vietnam in?
Vietnam operates on its local timezone.
What timezone is Saudi Arabia in?
Saudi Arabia 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 AST timezone?
Major cities in the AST timezone include Riyadh, Jeddah, Doha, Kuwait City, Baghdad.
What is the UTC offset for AST?
Arabia Standard Time (AST) is at UTC+03:00.
What should I know about the AST timezone?
None of the Gulf states on Arabia Standard Time observe daylight saving. AST is the same offset as Moscow Standard Time and East Africa Time.
When is it midnight in Vietnam, what time is it in Saudi Arabia?
When it is 12:00 AM (midnight) in Vietnam (ICT), it is -4h later in Saudi Arabia (AST).
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