Riyadh to London
-2hRiyadh
ASTSOURCELondon
BSTGreen rows indicate typical business hours (9 AM - 5 PM)
AST and BST on the World Map
The map below highlights the AST (Arabia Standard Time) and BST (Greenwich Mean Time) timezone regions across the globe.
AST – Arabia Standard Time
UTC+03:00Arabia Standard Time (AST, UTC+03:00) is the time zone for Saudi Arabia and the other Gulf states of the Arabian peninsula.
- •None of the Gulf states on Arabia Standard Time observe daylight saving.
- •AST is the same offset as Moscow Standard Time and East Africa Time.
- •Riyadh is one hour ahead of Central European Time in winter.
- •The AST abbreviation is shared with Atlantic Standard Time (UTC-04:00).
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 Riyadh
WikipediaRiyadh operates on Arabia Standard Time (AST), UTC+3. As OPEC's de facto capital and home to Tadawul, Riyadh time impacts global energy markets.
Riyadh is growing rapidly as part of Saudi Vision 2030 modernization.
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.
Comparing Time Zones: Riyadh and London
Riyadh runs on Arabian Standard Time (AST) at UTC+03:00. London runs on British Summer Time (BST) at UTC+01:00, also currently on daylight saving time. That puts Riyadh 2 hours behind London — a difference of -2h at the current offsets.
In practice, when it is 9:00 AM in Riyadh it is 7:00 AM in London. Midnight in Riyadh is 10:00 PM in London.London observes daylight saving time while Riyadh does not, so the gap narrows or widens by an hour part of the year.
Riyadh to London time conversion table
| Riyadh (AST) | London (BST) | Day |
|---|---|---|
| 12:00 AM | 10:00 PM | previous day |
| 6:00 AM | 4:00 AM | same day |
| 7:00 AM | 5:00 AM | same day |
| 8:00 AM | 6:00 AM | same day |
| 9:00 AM | 7:00 AM | same day |
| 12:00 PM | 10:00 AM | same day |
| 3:00 PM | 1:00 PM | same day |
| 5:00 PM | 3:00 PM | same day |
| 6:00 PM | 4:00 PM | same day |
| 9:00 PM | 7:00 PM | same day |
Why people convert Riyadh to London time
- Scheduling a call from Riyadh to London: a 10:00 AM start in Riyadh lands at 8:00 AM in London, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Riyadh and London are inside the 9-to-5 working day between 11:00 AM and 5:00 PM AST time (9:00 AM–3:00 PM BST). That is roughly 6 hours of usable overlap.
- Coordinating a Riyadh-based team with London 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 AST" is unambiguous; "3 PM" across a -2h gap is not.
- Block 11:00 AM–5:00 PM AST as the recurring meeting window if you work primarily from Riyadh 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 AST (Arabia Standard Time)
Arabia Standard Time (AST) is fixed at UTC+03:00 all year across Saudi Arabia, Qatar, Kuwait, Bahrain, Iraq and Yemen. None of these countries observes daylight saving time, so the offset never changes. The abbreviation collides with Atlantic Standard Time (UTC-04:00) used in eastern Canada and the Caribbean; this page covers the Arabian peninsula meaning. Arabia Standard Time is the same offset as Moscow Standard Time and East Africa Time, which makes scheduling with Europe straightforward — Riyadh is one hour ahead of Central European Time in winter and level with it during European summer 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 Riyadh and London
Both Riyadh and London sit inside the 9 AM – 5 PM working day between 11:00 AM–5:00 PM AST, which is 9:00 AM–3:00 PM BST. That gives roughly 6 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
Riyadh and London share 6 hours of working-hours overlap (11:00 AM–5:00 PM AST), so scheduling a live meeting is straightforward.
Riyadh is 2 hours behind London (AST UTC+03:00 → BST UTC+01:00). The shared working window is 11:00 AM–5:00 PM AST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
Riyadh
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 Riyadh and London?
Riyadh (AST, UTC+03:00) is 2 hours behind London (BST, UTC+01:00). The gap is currently -2h.
How do I convert Riyadh time to London time?
Add -2h to Riyadh local time. For example, 9:00 AM in Riyadh is 7:00 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 -2h offset from Riyadh.
What is the best time to call London from Riyadh?
Call between 11:00 AM and 5:00 PM AST — that maps to 9:00 AM–3:00 PM BST and keeps both parties inside the working day.
Which is behind, Riyadh or London?
Riyadh is 2 hours behind London. When it is 12:00 PM in Riyadh it is 10:00 AM in London.
Do Riyadh and London use different time zones?
Riyadh (Saudi Arabia) uses AST at UTC+03:00, while London (UK) uses BST at UTC+01:00. The IANA identifiers are Asia/Riyadh and Europe/London.
Does daylight saving time affect the Riyadh–London difference?
Yes at the moment: London is on daylight saving time and Riyadh is not, so the -2h gap shifts by an hour when exactly one of them changes clocks.
Which other cities share Riyadh's time zone?
AST also covers Riyadh, Jeddah, Doha, Kuwait City, Baghdad.
Which countries use AST, Riyadh's zone?
AST is used in Saudi Arabia, Qatar, Kuwait, Bahrain, Iraq, Yemen.
Is there a day difference between Riyadh and London?
Not normally. The -2h gap only pushes the date over the previous day.
What is the time difference between Riyadh and London?
London is -2h from Riyadh.
What timezone is Riyadh in?
Riyadh operates on Arabia Standard Time (AST), UTC+3. As OPEC's de facto capital and home to Tadawul, Riyadh time impacts global energy markets.
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 Riyadh?
Standard business hours in Riyadh are 8:00 AM - 4:00 PM AST (Sunday-Thursday).
What are the business hours in London?
Standard business hours in London are 9:00 AM - 5:00 PM GMT.
What is the best time to schedule a call between Riyadh and London?
The best overlap for a call is when both cities are in business hours. Riyadh works 8:00 AM - 4:00 PM AST (Sunday-Thursday) and London works 9:00 AM - 5:00 PM GMT (-2h difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in Riyadh and London?
Riyadh uses SAR (﷼) while London uses GBP (£). Check current exchange rates when planning travel or business between these cities.
How do Riyadh and London compare in size?
Riyadh has a population of approximately 7.7 million (metro: 7.7 million), while London has approximately 8.8 million (metro: 14.8 million).
What are the major landmarks in Riyadh and London?
Riyadh is known for Kingdom Centre, Masmak Fortress, National Museum. London is famous for Big Ben, Tower Bridge, Buckingham Palace.
Do Riyadh and London have stock exchanges?
Yes. Riyadh has the Tadawul (Saudi Stock Exchange) and London has the LSE (London Stock Exchange). The -2h time difference affects trading hour overlaps between these exchanges.
Which countries use AST (Arabia Standard Time)?
AST is used in Saudi Arabia, Qatar, Kuwait, Bahrain, Iraq, Yemen.
Does AST observe daylight saving time?
No, AST does not observe daylight saving time and remains at UTC+03:00 year-round.
What are some interesting facts about AST?
None of the Gulf states on Arabia Standard Time observe daylight saving. AST is the same offset as Moscow Standard Time and East Africa Time.
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 Riyadh, what time is it in London?
When it is 12:00 AM (midnight) in Riyadh (AST), it is -2h later in London (GMT).
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