Colombo to Ho Chi Minh
+1h 30mColombo
ISTSOURCEHo Chi Minh
ICTGreen rows indicate typical business hours (9 AM - 5 PM)
IST and ICT on the World Map
The map below highlights the IST (India Standard Time) and ICT (Indochina Time) timezone regions across the globe.
IST – India Standard Time
UTC+05:30India Standard Time (IST) is the time zone for India and Sri Lanka, 5 hours and 30 minutes ahead of UTC.
- •India is 10 hours 30 minutes ahead of EST and 5 hours 30 minutes ahead of GMT.
- •India uses a single time zone despite spanning 30° of longitude.
- •IST is one of only a handful of time zones with a 30-minute offset.
- •IST is the most populous single time zone in the world with over 1.4 billion people.
- •The Bombay Stock Exchange (BSE) and National Stock Exchange (NSE) operate on IST.
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 Colombo
WikipediaColombo operates on Sri Lanka Time (SLST), UTC+5:30. Sharing India's timezone, Colombo is a key South Asian trade and tourism hub.
Sri Lanka Standard Time (SLST) uses UTC+5:30, same offset as India.
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.
Time Conversion Guide: Colombo to Ho Chi Minh
Colombo runs on India Standard Time (IST) at UTC+05:30. Ho Chi Minh runs on Indochina Time (ICT) at UTC+07:00. That puts Colombo 1 hour 30 minutes ahead of Ho Chi Minh — a difference of +1h 30m at the current offsets.
In practice, when it is 9:00 AM in Colombo it is 10:30 AM in Ho Chi Minh. Midnight in Colombo is 1:30 AM in Ho Chi Minh. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Colombo to Ho Chi Minh time conversion table
| Colombo (IST) | Ho Chi Minh (ICT) | Day |
|---|---|---|
| 12:00 AM | 1:30 AM | same day |
| 6:00 AM | 7:30 AM | same day |
| 7:00 AM | 8:30 AM | same day |
| 8:00 AM | 9:30 AM | same day |
| 9:00 AM | 10:30 AM | same day |
| 12:00 PM | 1:30 PM | same day |
| 3:00 PM | 4:30 PM | same day |
| 5:00 PM | 6:30 PM | same day |
| 6:00 PM | 7:30 PM | same day |
| 9:00 PM | 10:30 PM | same day |
Why people convert Colombo to Ho Chi Minh time
- Scheduling a call from Colombo to Ho Chi Minh: a 10:00 AM start in Colombo lands at 11:30 AM in Ho Chi Minh, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Colombo and Ho Chi Minh are inside the 9-to-5 working day between 9:00 AM and 3:30 PM IST time (10:30 AM–5:00 PM ICT). That is roughly 6 hours 30 minutes of usable overlap.
- Watching a live event or market open: Colombo viewers need 10:30 AM in Ho Chi Minh to catch a 9:00 AM start there, and 10:30 PM if the event is anchored to Colombo.
- Always state the zone abbreviation, not just the hour. "3:00 PM IST" is unambiguous; "3 PM" across a +1h 30m gap is not.
- Block 9:00 AM–3:30 PM IST as the recurring meeting window if you work primarily from Colombo and need Ho Chi Minh colleagues present.
About IST (India Standard Time)
India Standard Time (IST) is the time observed throughout India and Sri Lanka. It is based on the 82.5°E meridian, passing through Mirzapur in Uttar Pradesh. India uses a single time zone despite spanning roughly 30° of longitude, which has been debated. IST does not observe daylight saving time. India is the world's most populous country, making IST one of the most-used time zones globally. The IT outsourcing industry and call centers operate primarily on IST, making the EST-to-IST conversion one of the most searched timezone conversions.
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 Colombo and Ho Chi Minh
Both Colombo and Ho Chi Minh sit inside the 9 AM – 5 PM working day between 9:00 AM–3:30 PM IST, which is 10:30 AM–5:00 PM ICT. That gives roughly 6 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
Colombo and Ho Chi Minh share 6 hours of working-hours overlap (9:00 AM–3:30 PM IST), so scheduling a live meeting is straightforward.
Colombo is 1 hour 30 minutes ahead of Ho Chi Minh (IST UTC+05:30 → ICT UTC+07:00). The shared working window is 9:00 AM–3:30 PM IST. 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 Colombo and Ho Chi Minh?
Colombo (IST, UTC+05:30) is 1 hour 30 minutes ahead of Ho Chi Minh (ICT, UTC+07:00). The gap is currently +1h 30m.
How do I convert Colombo time to Ho Chi Minh time?
Add +1h 30m to Colombo local time. For example, 9:00 AM in Colombo is 10:30 AM in Ho Chi Minh.
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 +1h 30m offset from Colombo.
What is the best time to call Ho Chi Minh from Colombo?
Call between 9:00 AM and 3:30 PM IST — that maps to 10:30 AM–5:00 PM ICT and keeps both parties inside the working day.
Which is ahead, Colombo or Ho Chi Minh?
Colombo is 1 hour 30 minutes ahead of Ho Chi Minh. When it is 12:00 PM in Colombo it is 1:30 PM in Ho Chi Minh.
Do Colombo and Ho Chi Minh use different time zones?
Colombo (Sri Lanka) uses IST at UTC+05:30, while Ho Chi Minh (Vietnam) uses ICT at UTC+07:00. The IANA identifiers are Asia/Colombo and Asia/Ho_Chi_Minh.
Does daylight saving time affect the Colombo–Ho Chi Minh difference?
Neither zone observes daylight saving time, so the +1h 30m offset between Colombo and Ho Chi Minh is fixed all year.
Which other cities share Colombo's time zone?
IST also covers Mumbai, Delhi, Bangalore, Kolkata, Chennai, Hyderabad, Pune, Ahmedabad and 4 more.
Which countries use IST, Colombo's zone?
IST is used in India, Sri Lanka.
Is there a day difference between Colombo and Ho Chi Minh?
Not normally. The +1h 30m gap only pushes the date over for late-evening times.
What is the time difference between Colombo and Ho Chi Minh?
Ho Chi Minh is +1h 30m from Colombo.
What timezone is Colombo in?
Colombo operates on Sri Lanka Time (SLST), UTC+5:30. Sharing India's timezone, Colombo is a key South Asian trade and tourism hub.
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 Colombo?
Standard business hours in Colombo are 9:00 AM - 5:00 PM IST.
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 Colombo and Ho Chi Minh?
The best overlap for a call is when both cities are in business hours. Colombo works 9:00 AM - 5:00 PM IST and Ho Chi Minh works 8:00 AM - 5:00 PM ICT (+1h 30m difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in Colombo and Ho Chi Minh?
Colombo uses LKR (Rs) while Ho Chi Minh uses VND (₫). Check current exchange rates when planning travel or business between these cities.
How do Colombo and Ho Chi Minh compare in size?
Colombo has a population of approximately 752,000 (metro: 5.6 million), while Ho Chi Minh has approximately 9 million (metro: 13 million).
What are the major landmarks in Colombo and Ho Chi Minh?
Colombo is known for Galle Face Green, Gangaramaya Temple, Colombo Lotus Tower. Ho Chi Minh is famous for Notre-Dame Cathedral, War Remnants Museum, Ben Thanh Market.
Do Colombo and Ho Chi Minh have stock exchanges?
Yes. Colombo has the CSE (Colombo Stock Exchange) and Ho Chi Minh has the HOSE (Ho Chi Minh Stock Exchange). The +1h 30m time difference affects trading hour overlaps between these exchanges.
Which countries use IST (India Standard Time)?
IST is used in India, Sri Lanka.
Does IST observe daylight saving time?
No, IST does not observe daylight saving time and remains at UTC+05:30 year-round.
What are some interesting facts about IST?
India is 10 hours 30 minutes ahead of EST and 5 hours 30 minutes ahead of GMT. India uses a single time zone despite spanning 30° of longitude.
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 Colombo, what time is it in Ho Chi Minh?
When it is 12:00 AM (midnight) in Colombo (IST), it is +1h 30m later in Ho Chi Minh (ICT).
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