Ho Chi Minh to Riyadh
-4hHo Chi Minh
ICTSOURCERiyadh
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).
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.
About Riyadh
WikipediaRiyadh operates on Arabia Standard Time (AST), UTC+3. As OPEC's de facto capital and home to Tadawul, Riyadh time impacts global energy markets.
Riyadh is growing rapidly as part of Saudi Vision 2030 modernization.
Understanding the -4h Gap: Ho Chi Minh vs Riyadh
Ho Chi Minh runs on Indochina Time (ICT) at UTC+07:00. Riyadh runs on Arabian Standard Time (AST) at UTC+03:00. That puts Ho Chi Minh 4 hours behind Riyadh — a difference of -4h at the current offsets.
In practice, when it is 9:00 AM in Ho Chi Minh it is 5:00 AM in Riyadh. Midnight in Ho Chi Minh is 8:00 PM in Riyadh. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Ho Chi Minh to Riyadh time conversion table
| Ho Chi Minh (ICT) | Riyadh (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 Ho Chi Minh to Riyadh time
- Scheduling a call from Ho Chi Minh to Riyadh: a 10:00 AM start in Ho Chi Minh lands at 6:00 AM in Riyadh, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Ho Chi Minh and Riyadh 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.
- Watching a live event or market open: Ho Chi Minh viewers need 5:00 AM in Riyadh to catch a 9:00 AM start there, and 4:00 AM if the event is anchored to Ho Chi Minh.
- 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 Ho Chi Minh and need Riyadh 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 Ho Chi Minh and Riyadh
Both Ho Chi Minh and Riyadh 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
Ho Chi Minh and Riyadh overlap for about 4 hours during the working day — enough for meetings if you avoid the edges of the window.
Ho Chi Minh is 4 hours behind Riyadh (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 Ho Chi Minh and Riyadh?
Ho Chi Minh (ICT, UTC+07:00) is 4 hours behind Riyadh (AST, UTC+03:00). The gap is currently -4h.
How do I convert Ho Chi Minh time to Riyadh time?
Add -4h to Ho Chi Minh local time. For example, 9:00 AM in Ho Chi Minh is 5:00 AM in Riyadh.
What time is it in Riyadh right now?
Riyadh 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 Ho Chi Minh.
What is the best time to call Riyadh from Ho Chi Minh?
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, Ho Chi Minh or Riyadh?
Ho Chi Minh is 4 hours behind Riyadh. When it is 12:00 PM in Ho Chi Minh it is 8:00 AM in Riyadh.
Do Ho Chi Minh and Riyadh use different time zones?
Ho Chi Minh (Vietnam) uses ICT at UTC+07:00, while Riyadh (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 Ho Chi Minh–Riyadh difference?
Neither zone observes daylight saving time, so the -4h offset between Ho Chi Minh and Riyadh 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 Riyadh?
Not normally. The -4h gap only pushes the date over the previous day.
What is the time difference between Ho Chi Minh and Riyadh?
Riyadh is -4h 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 Riyadh in?
Riyadh operates on Arabia Standard Time (AST), UTC+3. As OPEC's de facto capital and home to Tadawul, Riyadh time impacts global energy markets.
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 are the business hours in Riyadh?
Standard business hours in Riyadh are 8:00 AM - 4:00 PM AST (Sunday-Thursday).
What is the best time to schedule a call between Ho Chi Minh and Riyadh?
The best overlap for a call is when both cities are in business hours. Ho Chi Minh works 8:00 AM - 5:00 PM ICT and Riyadh works 8:00 AM - 4:00 PM AST (Sunday-Thursday) (-4h difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in Ho Chi Minh and Riyadh?
Ho Chi Minh uses VND (₫) while Riyadh uses SAR (﷼). Check current exchange rates when planning travel or business between these cities.
How do Ho Chi Minh and Riyadh compare in size?
Ho Chi Minh has a population of approximately 9 million (metro: 13 million), while Riyadh has approximately 7.7 million (metro: 7.7 million).
What are the major landmarks in Ho Chi Minh and Riyadh?
Ho Chi Minh is known for Notre-Dame Cathedral, War Remnants Museum, Ben Thanh Market. Riyadh is famous for Kingdom Centre, Masmak Fortress, National Museum.
Do Ho Chi Minh and Riyadh have stock exchanges?
Yes. Ho Chi Minh has the HOSE (Ho Chi Minh Stock Exchange) and Riyadh has the Tadawul (Saudi Stock Exchange). The -4h time difference affects trading hour overlaps between these exchanges.
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 Ho Chi Minh, what time is it in Riyadh?
When it is 12:00 AM (midnight) in Ho Chi Minh (ICT), it is -4h later in Riyadh (AST).
Related Developer Tools
Explore more tools that work great with timezone conversions for international teams:
Related Timezone Conversions
More Ho Chi Minh time conversions
- ho chi minh to vietnam
- ho chi minh to dubai
- ho chi minh to mumbai
- ho chi minh to delhi
- ho chi minh to bangalore
- ho chi minh to kathmandu
- ho chi minh to bangkok
- ho chi minh to singapore
- ho chi minh to hong kong
- ho chi minh to shanghai
- ho chi minh to beijing
- ho chi minh to tokyo
- ho chi minh to osaka
- ho chi minh to new york
- ho chi minh to london
- ho chi minh to sydney
- ho chi minh to los angeles
- ho chi minh to paris
- ho chi minh to berlin
- ho chi minh to toronto
- new york to ho chi minh
- london to ho chi minh
- dubai to ho chi minh
- tokyo to ho chi minh
- singapore to ho chi minh
- sydney to ho chi minh
- los angeles to ho chi minh
- paris to ho chi minh
- delhi to ho chi minh
- mumbai to ho chi minh
- berlin to ho chi minh
- hong kong to ho chi minh
- toronto to ho chi minh
- kathmandu to ho chi minh
See every conversion from Ho Chi Minh →·See every conversion from Riyadh →