ICT to EST
-12hICT
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.
ICT vs EST: Offsets, DST and Best Call Times
ICT runs on Indochina Time (ICT) at UTC+07:00. EST runs on Eastern Standard Time (EST) at UTC-05:00. That puts ICT 12 hours behind EST — a difference of -12h at the current offsets.
In practice, when it is 9:00 AM in ICT it is 9:00 PM in EST on the previous day. Midnight in ICT is 12:00 PM in EST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
ICT to EST time conversion table
| ICT (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 ICT to EST time
- Scheduling a call from ICT to EST: a 10:00 AM start in ICT 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: ICT 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 ICT.
- Keeping family and friends in sync: knowing that 8:00 PM in ICT 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 ICT 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 ICT 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 ICT, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
ICT and EST have no shared working hours because of the -12h gap. Teams need to alternate early starts or rely on asynchronous handovers.
ICT 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
ICT
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 ICT and EST?
ICT (ICT, UTC+07:00) is 12 hours behind EST (EST, UTC-05:00). The gap is currently -12h.
How do I convert ICT time to EST time?
Add -12h to ICT local time. For example, 9:00 AM in ICT 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 ICT.
What is the best time to call EST from ICT?
There is no shared working-hours window because of the -12h gap. The closest option is 1:00 PM in ICT, which is 1:00 AM in EST.
Which is behind, ICT or EST?
ICT is 12 hours behind EST. When it is 12:00 PM in ICT it is 12:00 AM in EST.
Does daylight saving time affect the ICT–EST difference?
Neither zone observes daylight saving time, so the -12h offset between ICT and EST is fixed all year.
Which other cities share ICT's time zone?
ICT also covers Bangkok, Ho Chi Minh City, Hanoi, Jakarta, Phnom Penh, Vientiane.
Which countries use ICT, ICT's zone?
ICT is used in Thailand, Vietnam, Cambodia, Laos, Indonesia (WIB).
Is there a day difference between ICT and EST?
Sometimes. The -12h gap is large enough that 8:00 PM or later in ICT already falls on the in EST.
What is the time difference between ICT and EST?
EST is -12h from ICT.
What timezone is ICT in?
ICT 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 ICT, what time is it in EST?
When it is 12:00 AM (midnight) in ICT (ICT), it is -12h later in EST (EST).
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- new york to ict
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- delhi to ict
- mumbai to ict
- berlin to ict
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See every conversion from ICT →·See every conversion from EST →