GMT to Thailand
+7hGMT
GMTSOURCEThailand
ICTGreen 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 – Greenwich Mean Time
UTC+00:00Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London. It is the same as UTC+00:00.
- •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.
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.
GMT to Thailand Time Difference – Complete Guide
GMT runs on Greenwich Mean Time (GMT) at UTC+00:00. Thailand runs on Indochina Time (ICT) at UTC+07:00. That puts GMT 7 hours ahead of Thailand — a difference of +7h at the current offsets.
In practice, when it is 9:00 AM in GMT it is 4:00 PM in Thailand. Midnight in GMT is 7:00 AM in Thailand. Neither zone observes daylight saving time, so the offset between them stays constant all year.
GMT to Thailand time conversion table
| GMT (GMT) | Thailand (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 Thailand time
- Scheduling a call from GMT to Thailand: a 10:00 AM start in GMT lands at 5:00 PM in Thailand, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both GMT and Thailand 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.
- Watching a live event or market open: GMT viewers need 4:00 PM in Thailand to catch a 9:00 AM start there, and 5:00 PM if the event is anchored to GMT.
- 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 Thailand 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 Thailand
Both GMT and Thailand 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 Thailand 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 Thailand (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
Thailand
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:
Frequently Asked Questions
What is the time difference between GMT and Thailand?
GMT (GMT, UTC+00:00) is 7 hours ahead of Thailand (ICT, UTC+07:00). The gap is currently +7h.
How do I convert GMT time to Thailand time?
Add +7h to GMT local time. For example, 9:00 AM in GMT is 4:00 PM in Thailand.
What time is it in Thailand right now?
Thailand 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 Thailand 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 Thailand?
GMT is 7 hours ahead of Thailand. When it is 12:00 PM in GMT it is 7:00 PM in Thailand.
Do GMT and Thailand use different time zones?
GMT uses GMT at UTC+00:00, while Thailand (Thailand) uses ICT at UTC+07:00. The IANA identifiers are Europe/London and Asia/Bangkok.
Does daylight saving time affect the GMT–Thailand difference?
Neither zone observes daylight saving time, so the +7h offset between GMT and Thailand 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 Thailand?
Not normally. The +7h gap only pushes the date over for late-evening times.
What is the time difference between GMT and Thailand?
Thailand is +7h from GMT.
What timezone is GMT in?
GMT operates on its local timezone.
What timezone is Thailand in?
Thailand 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.
Which cities are in the ICT timezone?
Major cities in the ICT timezone include Bangkok, Ho Chi Minh City, Hanoi, Jakarta, Phnom Penh, Vientiane.
What is the UTC offset for ICT?
Indochina Time (ICT) is at UTC+07:00.
What should I know about the ICT timezone?
Bangkok is one of the most visited cities in the world. ICT is 12 hours ahead of EST.
When is it midnight in GMT, what time is it in Thailand?
When it is 12:00 AM (midnight) in GMT (GMT), it is +7h later in Thailand (ICT).
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