GST to London
-3hGST
GSTSOURCELondon
BSTGreen rows indicate typical business hours (9 AM - 5 PM)
GST and BST on the World Map
The map below highlights the GST (Gulf Standard Time) and BST (Greenwich Mean Time) timezone regions across the globe.
GST – Gulf Standard Time
UTC+04:00Gulf Standard Time (GST) is used in the UAE, Oman, and other Gulf states, 4 hours ahead of UTC.
- •Dubai uses GST year-round with no daylight saving time.
- •GST is 9 hours ahead of EST and 4 hours ahead of GMT.
- •The Dubai Financial Market (DFM) operates on GST.
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.
Time Conversion Guide: GST to London
GST runs on Gulf Standard Time (GST) at UTC+04:00. London runs on British Summer Time (BST) at UTC+01:00, also currently on daylight saving time. That puts GST 3 hours behind London — a difference of -3h at the current offsets.
In practice, when it is 9:00 AM in GST it is 6:00 AM in London. Midnight in GST is 9:00 PM in London.London observes daylight saving time while GST does not, so the gap narrows or widens by an hour part of the year.
GST to London time conversion table
| GST (GST) | London (BST) | Day |
|---|---|---|
| 12:00 AM | 9:00 PM | previous day |
| 6:00 AM | 3:00 AM | same day |
| 7:00 AM | 4:00 AM | same day |
| 8:00 AM | 5:00 AM | same day |
| 9:00 AM | 6:00 AM | same day |
| 12:00 PM | 9:00 AM | same day |
| 3:00 PM | 12:00 PM | same day |
| 5:00 PM | 2:00 PM | same day |
| 6:00 PM | 3:00 PM | same day |
| 9:00 PM | 6:00 PM | same day |
Why people convert GST to London time
- Scheduling a call from GST to London: a 10:00 AM start in GST lands at 7:00 AM in London, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both GST and London are inside the 9-to-5 working day between 12:00 PM and 5:00 PM GST time (9:00 AM–2:00 PM BST). That is roughly 5 hours of usable overlap.
- Booking travel or deliveries: tracking London local time against GST keeps pickup windows and arrival estimates honest across the -3h offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM GST" is unambiguous; "3 PM" across a -3h gap is not.
- Block 12:00 PM–5:00 PM GST as the recurring meeting window if you work primarily from GST 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 GST (Gulf Standard Time)
Gulf Standard Time (GST) is the time zone used in the United Arab Emirates, Oman, and other Gulf states. GST does not observe daylight saving time. Dubai and Abu Dhabi, major international business and tourism hubs, operate on GST.
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 GST and London
Both GST and London sit inside the 9 AM – 5 PM working day between 12:00 PM–5:00 PM GST, which is 9:00 AM–2:00 PM BST. That gives roughly 5 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
GST and London share 5 hours of working-hours overlap (12:00 PM–5:00 PM GST), so scheduling a live meeting is straightforward.
GST is 3 hours behind London (GST UTC+04:00 → BST UTC+01:00). The shared working window is 12:00 PM–5:00 PM GST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
GST
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 GST and London?
GST (GST, UTC+04:00) is 3 hours behind London (BST, UTC+01:00). The gap is currently -3h.
How do I convert GST time to London time?
Add -3h to GST local time. For example, 9:00 AM in GST is 6:00 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 -3h offset from GST.
What is the best time to call London from GST?
Call between 12:00 PM and 5:00 PM GST — that maps to 9:00 AM–2:00 PM BST and keeps both parties inside the working day.
Which is behind, GST or London?
GST is 3 hours behind London. When it is 12:00 PM in GST it is 9:00 AM in London.
Do GST and London use different time zones?
GST uses GST at UTC+04:00, while London (UK) uses BST at UTC+01:00. The IANA identifiers are Asia/Dubai and Europe/London.
Does daylight saving time affect the GST–London difference?
Yes at the moment: London is on daylight saving time and GST is not, so the -3h gap shifts by an hour when exactly one of them changes clocks.
Which other cities share GST's time zone?
GST also covers Dubai, Abu Dhabi, Muscat, Baku, Tbilisi.
Which countries use GST, GST's zone?
GST is used in UAE, Oman, Georgia, Azerbaijan, Mauritius.
Is there a day difference between GST and London?
Not normally. The -3h gap only pushes the date over the previous day.
What is the time difference between GST and London?
London is -3h from GST.
What timezone is GST in?
GST 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 GST (Gulf Standard Time)?
GST is used in UAE, Oman, Georgia, Azerbaijan, Mauritius.
Does GST observe daylight saving time?
No, GST does not observe daylight saving time and remains at UTC+04:00 year-round.
What are some interesting facts about GST?
Dubai uses GST year-round with no daylight saving time. GST is 9 hours ahead of EST and 4 hours ahead of GMT.
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 GST, what time is it in London?
When it is 12:00 AM (midnight) in GST (GST), it is -3h later in London (GMT).
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