Vietnam to COT
-12hVietnam
ICTSOURCECOT
COTGreen rows indicate typical business hours (9 AM - 5 PM)
ICT and COT on the World Map
The map below highlights the ICT (Indochina Time) and COT (Colombia 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.
COT – Colombia Time
UTC-05:00Colombia Time (COT) is the standard time for Colombia, 5 hours behind UTC.
- •Colombia does not observe daylight saving time.
- •COT is the same offset as EST (UTC-05:00).
- •Bogotá sits at 2,640m elevation, making it one of the highest capital cities.
Vietnam vs COT: Offsets, DST and Best Call Times
Vietnam runs on Indochina Time (ICT) at UTC+07:00. COT runs on Colombia Time (COT) at UTC-05:00. That puts Vietnam 12 hours behind COT — a difference of -12h at the current offsets.
In practice, when it is 9:00 AM in Vietnam it is 9:00 PM in COT on the previous day. Midnight in Vietnam is 12:00 PM in COT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Vietnam to COT time conversion table
| Vietnam (ICT) | COT (COT) | Day |
|---|---|---|
| 12:00 AM | 12:00 PM | previous day |
| 6:00 AM | 6:00 PM | previous day |
| 7:00 AM | 7:00 PM | previous day |
| 8:00 AM | 8:00 PM | previous day |
| 9:00 AM | 9:00 PM | previous day |
| 12:00 PM | 12:00 AM | same day |
| 3:00 PM | 3:00 AM | same day |
| 5:00 PM | 5:00 AM | same day |
| 6:00 PM | 6:00 AM | same day |
| 9:00 PM | 9:00 AM | same day |
Why people convert Vietnam to COT time
- Scheduling a call from Vietnam to COT: a 10:00 AM start in Vietnam lands at 10:00 PM in COT the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -12h gap: Vietnam and COT have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in COT is 9:00 PM in Vietnam.
- Booking travel or deliveries: tracking COT local time against Vietnam keeps pickup windows and arrival estimates honest across the -12h offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM ICT" is unambiguous; "3 PM" across a -12h gap is not.
- With a -12h gap there is no shared 9-to-5 window, so alternate the early start: one week Vietnam takes the early slot, the next week COT does.
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 COT (Colombia Time)
Colombia Time (COT) is used throughout Colombia. Colombia does not observe daylight saving time. COT shares the same offset as EST (UTC-05:00). Bogotá, the capital, is one of the largest cities in South America.
Best time to call between Vietnam and COT
With a -12h offset there is no overlap inside a normal 9 AM – 5 PM day. COT opens at 9:00 AM COT, which is 9:00 PM in Vietnam, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
Vietnam and COT have no shared working hours because of the -12h gap. Teams need to alternate early starts or rely on asynchronous handovers.
Vietnam is 12 hours behind COT (ICT UTC+07:00 → COT UTC-05:00). There is no shared 9-to-5 window, so plan around an early or late slot. 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 COT?
Vietnam (ICT, UTC+07:00) is 12 hours behind COT (COT, UTC-05:00). The gap is currently -12h.
How do I convert Vietnam time to COT time?
Add -12h to Vietnam local time. For example, 9:00 AM in Vietnam is 9:00 PM in COT (previous day).
What time is it in COT right now?
COT uses COT at UTC-05:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -12h offset from Vietnam.
What is the best time to call COT from Vietnam?
There is no shared working-hours window because of the -12h gap. The closest option is 1:00 PM in Vietnam, which is 1:00 AM in COT.
Which is behind, Vietnam or COT?
Vietnam is 12 hours behind COT. When it is 12:00 PM in Vietnam it is 12:00 AM in COT.
Do Vietnam and COT use different time zones?
Vietnam (Vietnam) uses ICT at UTC+07:00, while COT uses COT at UTC-05:00. The IANA identifiers are Asia/Ho_Chi_Minh and America/Bogota.
Does daylight saving time affect the Vietnam–COT difference?
Neither zone observes daylight saving time, so the -12h offset between Vietnam and COT 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 COT?
Sometimes. The -12h gap is large enough that 8:00 PM or later in Vietnam already falls on the in COT.
What is the time difference between Vietnam and COT?
COT is -12h from Vietnam.
What timezone is Vietnam in?
Vietnam operates on its local timezone.
What timezone is COT in?
COT 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 COT timezone?
Major cities in the COT timezone include Bogotá, Medellín, Cali, Barranquilla, Cartagena.
What is the UTC offset for COT?
Colombia Time (COT) is at UTC-05:00.
What should I know about the COT timezone?
Colombia does not observe daylight saving time. COT is the same offset as EST (UTC-05:00).
When is it midnight in Vietnam, what time is it in COT?
When it is 12:00 AM (midnight) in Vietnam (ICT), it is -12h later in COT (COT).
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