Thailand to London
-6hThailand
ICTSOURCELondon
BSTGreen rows indicate typical business hours (9 AM - 5 PM)
ICT and BST on the World Map
The map below highlights the ICT (Indochina Time) and BST (Greenwich Mean 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.
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.
About London
WikipediaLondon, where Greenwich Mean Time (GMT) originates, is the world's leading financial center alongside New York. The city bridges European and American business hours.
Big Ben is actually the name of the bell inside the Elizabeth Tower, not the tower itself.
Thailand to London Time Difference – Complete Guide
Thailand runs on Indochina Time (ICT) at UTC+07:00. London runs on British Summer Time (BST) at UTC+01:00, also currently on daylight saving time. That puts Thailand 6 hours behind London — a difference of -6h at the current offsets.
In practice, when it is 9:00 AM in Thailand it is 3:00 AM in London. Midnight in Thailand is 6:00 PM in London.London observes daylight saving time while Thailand does not, so the gap narrows or widens by an hour part of the year.
Thailand to London time conversion table
| Thailand (ICT) | London (BST) | Day |
|---|---|---|
| 12:00 AM | 6:00 PM | previous day |
| 6:00 AM | 12:00 AM | same day |
| 7:00 AM | 1:00 AM | same day |
| 8:00 AM | 2:00 AM | same day |
| 9:00 AM | 3:00 AM | same day |
| 12:00 PM | 6:00 AM | same day |
| 3:00 PM | 9:00 AM | same day |
| 5:00 PM | 11:00 AM | same day |
| 6:00 PM | 12:00 PM | same day |
| 9:00 PM | 3:00 PM | same day |
Why people convert Thailand to London time
- Scheduling a call from Thailand to London: a 10:00 AM start in Thailand lands at 4:00 AM in London, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Thailand and London are inside the 9-to-5 working day between 3:00 PM and 5:00 PM ICT time (9:00 AM–11:00 AM BST). That is roughly 2 hours of usable overlap.
- Watching a live event or market open: Thailand viewers need 3:00 AM in London to catch a 9:00 AM start there, and 6:00 AM if the event is anchored to Thailand.
- Always state the zone abbreviation, not just the hour. "3:00 PM ICT" is unambiguous; "3 PM" across a -6h gap is not.
- Block 3:00 PM–5:00 PM ICT as the recurring meeting window if you work primarily from Thailand and need London colleagues present.
- London: Clocks fall back on Sun, Oct 25, 2026. Any meeting series spanning that date will shift by an hour in local time.
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 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.
Best time to call between Thailand and London
Both Thailand and London sit inside the 9 AM – 5 PM working day between 3:00 PM–5:00 PM ICT, which is 9:00 AM–11:00 AM BST. That gives roughly 2 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
Thailand and London overlap for about 2 hours during the working day — enough for meetings if you avoid the edges of the window.
Thailand is 6 hours behind London (ICT UTC+07:00 → BST UTC+01:00). The shared working window is 3:00 PM–5:00 PM ICT. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
Thailand
Does not observe DST
London
☀ Currently in DST
Standard: UTC+00:00 · DST: UTC+01:00
Clocks fall back on Sun, Oct 25, 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 Thailand and London?
Thailand (ICT, UTC+07:00) is 6 hours behind London (BST, UTC+01:00). The gap is currently -6h.
How do I convert Thailand time to London time?
Add -6h to Thailand local time. For example, 9:00 AM in Thailand is 3:00 AM in London.
What time is it in London right now?
London uses BST at UTC+01:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -6h offset from Thailand.
What is the best time to call London from Thailand?
Call between 3:00 PM and 5:00 PM ICT — that maps to 9:00 AM–11:00 AM BST and keeps both parties inside the working day.
Which is behind, Thailand or London?
Thailand is 6 hours behind London. When it is 12:00 PM in Thailand it is 6:00 AM in London.
Do Thailand and London use different time zones?
Thailand (Thailand) uses ICT at UTC+07:00, while London (UK) uses BST at UTC+01:00. The IANA identifiers are Asia/Bangkok and Europe/London.
Does daylight saving time affect the Thailand–London difference?
Yes at the moment: London is on daylight saving time and Thailand is not, so the -6h gap shifts by an hour when exactly one of them changes clocks.
Which other cities share Thailand's time zone?
ICT also covers Bangkok, Ho Chi Minh City, Hanoi, Jakarta, Phnom Penh, Vientiane.
Which countries use ICT, Thailand's zone?
ICT is used in Thailand, Vietnam, Cambodia, Laos, Indonesia (WIB).
Is there a day difference between Thailand and London?
Not normally. The -6h gap only pushes the date over the previous day.
What is the time difference between Thailand and London?
London is -6h from Thailand.
What timezone is Thailand in?
Thailand operates on its local timezone.
What timezone is London in?
London, where Greenwich Mean Time (GMT) originates, is the world's leading financial center alongside New York. The city bridges European and American business hours.
What are the business hours in London?
Standard business hours in London are 9:00 AM - 5:00 PM GMT.
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 GMT timezone?
Major cities in the GMT timezone include London, Dublin, Lisbon, Accra, Reykjavik, Edinburgh, Casablanca, Dakar.
What is the UTC offset for GMT?
Greenwich Mean Time (GMT) is at UTC+00:00. During daylight saving time, it shifts to BST.
What should I know about the GMT timezone?
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.
When is it midnight in Thailand, what time is it in London?
When it is 12:00 AM (midnight) in Thailand (ICT), it is -6h later in London (GMT).
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