Does it account for Daylight Saving Time?

Yes, our converter uses the IANA timezone database, which includes all current DST rules for every timezone in the world.

UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks. All timezones are defined as offsets from UTC.

Can I compare multiple timezones at once?

Yes, you can add multiple cities or timezones and see the equivalent times side by side.

How many timezones are there in the world?

There are 38 distinct UTC offsets in use, ranging from UTC-12 to UTC+14. This includes half-hour (UTC+5:30 India, UTC+9:30 Australia) and 45-minute offsets (UTC+5:45 Nepal, UTC+8:45 Australia).

What is the International Date Line?

The International Date Line (IDL) runs roughly along the 180° meridian in the Pacific Ocean. When you cross it westward, you gain a day; crossing eastward, you lose a day.

Why do some timezones have 30 or 45 minute offsets?

Countries chose offsets that best matched their solar noon. India uses UTC+5:30 and Nepal uses UTC+5:45 because standard hourly offsets didn't align well with their geography.

Which country has the most timezones?

France has the most (12 timezones) due to overseas territories. Russia spans 11 timezones. The US has 6 (including Hawaii and Alaska).

GMT to ICT

+7h

GMT

GMTSOURCE

UTC+01:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

ICT

UTC+07:00

HH07

MM00

19:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

GMT

ICT

12:00 AM

6:00 AM

2:00 AM

8:00 AM

4:00 AM

10:00 AM

6:00 AM

12:00 PM

8:00 AM

2:00 PM

10:00 AM

4:00 PM

12:00 PM

6:00 PM

2:00 PM

8:00 PM

4:00 PM

10:00 PM

6:00 PM

12:00 AM+1

8:00 PM

2:00 AM+1

10:00 PM

4:00 AM+1

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

GMT and ICT on the World Map

The map below highlights the GMT (Greenwich Mean Time) and ICT (Indochina Time) timezone regions across the globe.

GMT Zone

→

ICT Zone

Explore all world timezones interactively →

GMT – Greenwich Mean Time

UTC+00:00

Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London. It is the same as UTC+00:00.

Countries in GMT

United KingdomIrelandIcelandPortugal (mainland)GhanaSenegalMaliMauritaniaGambiaGuineaSierra LeoneLiberiaIvory CoastBurkina FasoMorocco (historically)

Major Cities in GMT

LondonDublinLisbonAccraReykjavikEdinburghCasablancaDakarBamakoAbidjanConakryFreetownMonrovia

Key Facts about GMT

•GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London.
•The Royal Observatory in Greenwich has been the reference point for GMT since 1884.
•GMT and UTC are often used interchangeably, but UTC is based on atomic clocks.
•Iceland uses GMT year-round and never observes daylight saving time.
•The UK switches from GMT to BST (British Summer Time) in late March each year.

Daylight Saving:Yes – switches to BST

Learn more about GMT 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

Time Conversion Guide: GMT to ICT

GMT runs on Greenwich Mean Time (GMT) at UTC+00:00. ICT runs on Indochina Time (ICT) at UTC+07:00. That puts GMT 7 hours ahead of ICT — a difference of +7h at the current offsets.

In practice, when it is 9:00 AM in GMT it is 4:00 PM in ICT. Midnight in GMT is 7:00 AM in ICT. Neither zone observes daylight saving time, so the offset between them stays constant all year.

GMT to ICT time conversion table

GMT (GMT)	ICT (ICT)	Day
12:00 AM	7:00 AM	same day
6:00 AM	1:00 PM	same day
7:00 AM	2:00 PM	same day
8:00 AM	3:00 PM	same day
9:00 AM	4:00 PM	same day
12:00 PM	7:00 PM	same day
3:00 PM	10:00 PM	same day
5:00 PM	12:00 AM	next day
6:00 PM	1:00 AM	next day
9:00 PM	4:00 AM	next day

Why people convert GMT to ICT time

Scheduling a call from GMT to ICT: a 10:00 AM start in GMT lands at 5:00 PM in ICT, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both GMT and ICT are inside the 9-to-5 working day between 9:00 AM and 10:00 AM GMT time (4:00 PM–5:00 PM ICT). That is roughly 1 hours of usable overlap.
Booking travel or deliveries: tracking ICT local time against GMT keeps pickup windows and arrival estimates honest across the +7h offset.

Always state the zone abbreviation, not just the hour. "3:00 PM GMT" is unambiguous; "3 PM" across a +7h gap is not.
Block 9:00 AM–10:00 AM GMT as the recurring meeting window if you work primarily from GMT and need ICT colleagues present.

About GMT (Greenwich Mean Time)

Greenwich Mean Time (GMT) is the clock time at the Royal Observatory in Greenwich, London, which sits on the Prime Meridian (0° longitude). GMT serves as the reference point from which all other time zones are calculated. The United Kingdom uses GMT during winter months and switches to British Summer Time (BST, UTC+01:00) from late March to late October. Several West African nations use GMT year-round. GMT is often used interchangeably with UTC (Coordinated Universal Time), although technically they are different – UTC is based on atomic clocks while GMT is based on Earth's rotation.

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 GMT and ICT

Both GMT and ICT sit inside the 9 AM – 5 PM working day between 9:00 AM–10:00 AM GMT, which is 4:00 PM–5:00 PM ICT. That gives roughly 1 hours of shared time — the safest window for a live call or meeting.

Business hours overlap

GMT and ICT overlap for only 60 minutes (9:00 AM–10:00 AM GMT), so meetings have to be booked precisely.

GMT is 7 hours ahead of ICT (GMT UTC+00:00 → ICT UTC+07:00). The shared working window is 9:00 AM–10:00 AM GMT. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

GMT

☀ Currently in DST

Standard: UTC+00:00 · DST: UTC+01:00

Clocks fall back on Sun, Oct 25, 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 GMT and ICT?

GMT (GMT, UTC+00:00) is 7 hours ahead of ICT (ICT, UTC+07:00). The gap is currently +7h.

How do I convert GMT time to ICT time?

Add +7h to GMT local time. For example, 9:00 AM in GMT is 4:00 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 +7h offset from GMT.

What is the best time to call ICT from GMT?

Call between 9:00 AM and 10:00 AM GMT — that maps to 4:00 PM–5:00 PM ICT and keeps both parties inside the working day.

Which is ahead, GMT or ICT?

GMT is 7 hours ahead of ICT. When it is 12:00 PM in GMT it is 7:00 PM in ICT.

Does daylight saving time affect the GMT–ICT difference?

Neither zone observes daylight saving time, so the +7h offset between GMT and ICT is fixed all year.

Which other cities share GMT's time zone?

GMT also covers London, Dublin, Lisbon, Accra, Reykjavik, Edinburgh, Casablanca, Dakar and 5 more.

Which countries use GMT, GMT's zone?

GMT is used in United Kingdom, Ireland, Iceland, Portugal (mainland), Ghana, Senegal, Mali, Mauritania and 7 more.

Is there a day difference between GMT and ICT?

Not normally. The +7h gap only pushes the date over for late-evening times.

What is the time difference between GMT and ICT?

ICT is +7h from GMT.

What timezone is GMT in?

GMT operates on its local timezone.

What timezone is ICT in?

ICT operates on its local timezone.

Which countries use GMT (Greenwich Mean Time)?

GMT is used in United Kingdom, Ireland, Iceland, Portugal (mainland), Ghana, Senegal, and 9 more countries.

Does GMT observe daylight saving time?

Yes, GMT switches to BST during summer months.

What are some interesting facts about GMT?

GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London. The Royal Observatory in Greenwich has been the reference point for GMT since 1884.