Does it handle Daylight Saving Time?

Yes, the tool automatically adjusts for Daylight Saving Time based on the specific date you select, ensuring accurate conversions year-round.

Can I add multiple cities?

Yes, you can add as many cities as you need to the dashboard to compare times across your entire global network simultaneously.

EST to ICT

+12h

EST

ESTSOURCE

UTC-04:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

ICT

UTC+07:00

HH12

MM00

(next day)00:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

EST

ICT

12:00 AM

11:00 AM

2:00 AM

1:00 PM

4:00 AM

3:00 PM

6:00 AM

5:00 PM

8:00 AM

7:00 PM

10:00 AM

9:00 PM

12:00 PM

11:00 PM

2:00 PM

1:00 AM+1

4:00 PM

3:00 AM+1

6:00 PM

5:00 AM+1

8:00 PM

7:00 AM+1

10:00 PM

9:00 AM+1

Green rows indicate typical business hours (9 AM - 5 PM)

EST and ICT on the World Map

The map below highlights the EST (Eastern Standard Time) and ICT (Indochina Time) timezone regions across the globe.

EST Zone

→

ICT Zone

Explore all world timezones interactively →

EST – Eastern Standard Time

UTC-05:00

Eastern Standard Time (EST) is the time zone for the eastern United States and Canada, 5 hours behind UTC.

Countries in EST

United States (Eastern)Canada (Ontario, Quebec)Mexico (Quintana Roo)PanamaJamaicaCayman IslandsHaitiBahamasTurks and CaicosColombiaPeruEcuador

Major Cities in EST

New York CityWashington D.C.MiamiTorontoPhiladelphiaAtlantaBostonMontrealDetroitCharlotteIndianapolisOttawaTampaOrlandoClevelandPittsburgh

Key Facts about EST

•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.

Daylight Saving:Yes – switches to EDT

Learn more about EST on Wikipedia

ICT – Indochina Time

UTC+07:00

Indochina Time (ICT) is the time zone for Vietnam, Thailand, Laos, and Cambodia, 7 hours ahead of UTC.

Countries in ICT

ThailandVietnamCambodiaLaosIndonesia (WIB)

Major Cities in ICT

BangkokHo Chi Minh CityHanoiJakartaPhnom PenhVientiane

Key Facts about ICT

•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.

Daylight Saving:No – UTC+07:00 year-round

Learn more about ICT on Wikipedia

Understanding the +12h Gap: EST vs ICT

EST runs on Eastern Standard Time (EST) at UTC-05:00. ICT runs on Indochina Time (ICT) at UTC+07:00. That puts EST 12 hours ahead of ICT — a difference of +12h at the current offsets.

In practice, when it is 9:00 AM in EST it is 9:00 PM in ICT. Midnight in EST is 12:00 PM in ICT. Neither zone observes daylight saving time, so the offset between them stays constant all year.

EST to ICT time conversion table

EST (EST)	ICT (ICT)	Day
12:00 AM	12:00 PM	same day
6:00 AM	6:00 PM	same day
7:00 AM	7:00 PM	same day
8:00 AM	8:00 PM	same day
9:00 AM	9:00 PM	same day
12:00 PM	12:00 AM	next day
3:00 PM	3:00 AM	next day
5:00 PM	5:00 AM	next day
6:00 PM	6:00 AM	next day
9:00 PM	9:00 AM	next day

Why people convert EST to ICT time

Scheduling a call from EST to ICT: a 10:00 AM start in EST lands at 10:00 PM in ICT, so you can confirm the slot without doing the arithmetic yourself.
Handling a +12h gap: EST and ICT 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 ICT is 9:00 PM in EST.
Coordinating a EST-based team with ICT contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.

Always state the zone abbreviation, not just the hour. "3:00 PM EST" 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 EST takes the early slot, the next week ICT does.

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.

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 EST and ICT

With a +12h offset there is no overlap inside a normal 9 AM – 5 PM day. ICT opens at 9:00 AM ICT, which is 9:00 PM in EST, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

EST and ICT have no shared working hours because of the +12h gap. Teams need to alternate early starts or rely on asynchronous handovers.

EST is 12 hours ahead of ICT (EST UTC-05:00 → ICT UTC+07:00). 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

EST

☀ Currently in DST

Standard: UTC-05:00 · DST: UTC-04:00

Clocks fall back on Sun, Nov 1, 2026

ICT

Does not observe DST

Learn More About Time

Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:

⏳

History of Timekeeping

From sundials to atomic clocks - 5000 years of measuring time

🌍

How Time Zones Work

UTC, offsets, and why zones don't follow straight lines

☀️

Daylight Saving Time

DST dates, which countries observe it, and the ongoing debate

Frequently Asked Questions

What is the time difference between EST and ICT?

EST (EST, UTC-05:00) is 12 hours ahead of ICT (ICT, UTC+07:00). The gap is currently +12h.

How do I convert EST time to ICT time?

Add +12h to EST local time. For example, 9:00 AM in EST is 9:00 PM in ICT.

What time is it in ICT right now?

ICT 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 +12h offset from EST.

What is the best time to call ICT from EST?

There is no shared working-hours window because of the +12h gap. The closest option is 1:00 PM in EST, which is 1:00 AM in ICT.

Which is ahead, EST or ICT?

EST is 12 hours ahead of ICT. When it is 12:00 PM in EST it is 12:00 AM in ICT.

Does daylight saving time affect the EST–ICT difference?

Neither zone observes daylight saving time, so the +12h offset between EST and ICT is fixed all year.

Which other cities share EST's time zone?

EST also covers New York City, Washington D.C., Miami, Toronto, Philadelphia, Atlanta, Boston, Montreal and 8 more.

Which countries use EST, EST's zone?

EST is used in United States (Eastern), Canada (Ontario, Quebec), Mexico (Quintana Roo), Panama, Jamaica, Cayman Islands, Haiti, Bahamas and 4 more.

Is there a day difference between EST and ICT?

Sometimes. The +12h gap is large enough that 8:00 PM or later in EST already falls on the next day in ICT.

What is the time difference between EST and ICT?

ICT is +12h from EST.

What timezone is EST in?

EST operates on its local timezone.

What timezone is ICT in?

ICT operates on its local timezone.

Which countries use EST (Eastern Standard Time)?

EST is used in United States (Eastern), Canada (Ontario, Quebec), Mexico (Quintana Roo), Panama, Jamaica, Cayman Islands, and 6 more countries.

Does EST observe daylight saving time?

Yes, EST switches to EDT during summer months.

What are some interesting facts about EST?

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.