Vietnam to EST
-12hVietnam
ICTSOURCEEST
ESTGreen rows indicate typical business hours (9 AM - 5 PM)
ICT and EST on the World Map
The map below highlights the ICT (Indochina Time) and EST (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.
EST – Eastern Standard Time
UTC-05:00Eastern Standard Time (EST) is the time zone for the eastern United States and Canada, 5 hours behind UTC.
- •EST is the most widely used time zone in the United States by population.
- •The New York Stock Exchange (NYSE) and NASDAQ operate on Eastern Time, opening at 9:30 AM EST.
- •23 US states are fully or partially in the Eastern Time Zone.
- •EST was established by the Standard Time Act of 1918.
- •Over 47% of the US population lives in the Eastern Time Zone.
Vietnam vs EST: Offsets, DST and Best Call Times
Vietnam runs on Indochina Time (ICT) at UTC+07:00. EST runs on Eastern Standard Time (EST) at UTC-05:00. That puts Vietnam 12 hours behind EST — a difference of -12h at the current offsets.
In practice, when it is 9:00 AM in Vietnam it is 9:00 PM in EST on the previous day. Midnight in Vietnam is 12:00 PM in EST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Vietnam to EST time conversion table
| Vietnam (ICT) | EST (EST) | 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 EST time
- Scheduling a call from Vietnam to EST: a 10:00 AM start in Vietnam lands at 10:00 PM in EST the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -12h gap: Vietnam and EST 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 EST is 9:00 PM in Vietnam.
- Keeping family and friends in sync: knowing that 8:00 PM in Vietnam is 8:00 AM in EST makes it easy to avoid calling at 3 AM.
- 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 EST 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 EST (Eastern Standard Time)
Eastern Standard Time (EST) is observed during the winter months in the eastern part of North America. It covers 23 US states and parts of Canada including Ontario and Quebec. EST is the most populous time zone in the United States, home to major financial centers like New York City and global organizations headquartered in Washington D.C. During daylight saving time (March–November), clocks shift to Eastern Daylight Time (EDT, UTC-04:00). The time zone also covers parts of the Caribbean and Central America including Panama, Jamaica, and the Cayman Islands.
Best time to call between Vietnam and EST
With a -12h offset there is no overlap inside a normal 9 AM – 5 PM day. EST opens at 9:00 AM EST, 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 EST 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 EST (ICT UTC+07:00 → EST 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.
🕐 Daylight Saving Time Info
Vietnam
Does not observe DST
EST
☀ Currently in DST
Standard: UTC-05:00 · DST: UTC-04:00
Clocks fall back on Sun, Nov 1, 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 EST?
Vietnam (ICT, UTC+07:00) is 12 hours behind EST (EST, UTC-05:00). The gap is currently -12h.
How do I convert Vietnam time to EST time?
Add -12h to Vietnam local time. For example, 9:00 AM in Vietnam is 9:00 PM in EST (previous day).
What time is it in EST right now?
EST uses EST 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 EST 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 EST.
Which is behind, Vietnam or EST?
Vietnam is 12 hours behind EST. When it is 12:00 PM in Vietnam it is 12:00 AM in EST.
Do Vietnam and EST use different time zones?
Vietnam (Vietnam) uses ICT at UTC+07:00, while EST uses EST at UTC-05:00. The IANA identifiers are Asia/Ho_Chi_Minh and America/New_York.
Does daylight saving time affect the Vietnam–EST difference?
Neither zone observes daylight saving time, so the -12h offset between Vietnam and EST 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 EST?
Sometimes. The -12h gap is large enough that 8:00 PM or later in Vietnam already falls on the in EST.
What is the time difference between Vietnam and EST?
EST is -12h from Vietnam.
What timezone is Vietnam in?
Vietnam operates on its local timezone.
What timezone is EST in?
EST 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 EST timezone?
Major cities in the EST timezone include New York City, Washington D.C., Miami, Toronto, Philadelphia, Atlanta, Boston, Montreal.
What is the UTC offset for EST?
Eastern Standard Time (EST) is at UTC-05:00. During daylight saving time, it shifts to EDT.
What should I know about the EST timezone?
EST is the most widely used time zone in the United States by population. The New York Stock Exchange (NYSE) and NASDAQ operate on Eastern Time, opening at 9:30 AM EST.
When is it midnight in Vietnam, what time is it in EST?
When it is 12:00 AM (midnight) in Vietnam (ICT), it is -12h later in EST (EST).
Related Developer Tools
Explore more tools that work great with timezone conversions for international teams:
Related Timezone Conversions
More Vietnam time conversions
- vietnam to ho chi minh
- vietnam to new york
- vietnam to london
- vietnam to dubai
- vietnam to tokyo
- vietnam to singapore
- vietnam to sydney
- vietnam to los angeles
- vietnam to paris
- vietnam to delhi
- vietnam to mumbai
- vietnam to berlin
- vietnam to hong kong
- vietnam to toronto
- vietnam to kathmandu
- new york to vietnam
- london to vietnam
- dubai to vietnam
- tokyo to vietnam
- singapore to vietnam
- sydney to vietnam
- los angeles to vietnam
- paris to vietnam
- delhi to vietnam
- mumbai to vietnam
- berlin to vietnam
- hong kong to vietnam
- toronto to vietnam
- kathmandu to vietnam
See every conversion from Vietnam →·See every conversion from EST →