Working hours: 09:00–17:00 local. Green = both working.Purple = one side only.
Frequently Asked Questions
What is the difference between london and ast?
LONDON (London) (london) is UTC+1 and Arabia Standard Time (ast) is UTC+3. The difference between them is 2 hours.
Where is london used?
LONDON (London) (london) is used in United Kingdom and surrounding regions. The IANA timezone identifier is Europe/London.
Where is ast used?
Arabia Standard Time (ast) is used in Saudi Arabia and surrounding regions. The IANA timezone identifier is Asia/Riyadh. Note: ast is ambiguous and may refer to other timezones.
How do I convert london to ast?
Use the interactive converter above. Drag the time slider to any london time and the ast equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.
London is 2 hours behind AST (Riyadh). When London clocks hit noon, AST (Riyadh) reads 14:00.
London is in the Europe/London timezone. AST (Riyadh) is in Asia/Riyadh. The difference is 2 hours.
Daily overlap window
Every working day, London and AST (Riyadh) are both in business hours for 6 hours simultaneously.
00:0006:0012:0018:0024:00
London
AST (Riyadh)
Overlap (6h)
When to schedule across time zones
Both London and AST (Riyadh) are in standard hours simultaneously for 6h per day. 3 recommended slots shown below.
09:00 London / 11:00 Riyadh✓ Both working
10:00 London / 12:00 Riyadh✓ Both working
11:00 London / 13:00 Riyadh✓ Both working
Based on standard 09:00–17:00 working hours in each location's local time.
Holiday calendar for both locations
London6 holidays
Jul 13Battle of the Boyne
Aug 3Summer Bank Holiday
Aug 31Summer Bank Holiday
Nov 30Saint Andrew's Day
Dec 25Christmas Day
AST (Riyadh)
No upcoming public holidays this year.
Working across London and AST (Riyadh)
Working across London (United Kingdom) and AST (Riyadh) (Saudi Arabia) involves a 2-hour gap. The good news: there is a 6-hour mutual window in standard business hours that lets both sides collaborate without anyone joining at an unreasonable hour.
💡 Best practice for cross-timezone meetings
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09:00–10:00 in London = 11:00–12:00 in AST (Riyadh). Both sides are in standard business hours during this window.
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10:00–11:00 in London = 12:00–13:00 in AST (Riyadh). Both sides are in standard business hours during this window.
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11:00–12:00 in London = 13:00–14:00 in AST (Riyadh). Both sides are in standard business hours during this window.
DST transitions can silently shift your meeting times by an hour. The ClockinSync Chrome Extension tracks these changes automatically so you never get caught off guard.
Use the time slider above to find the exact equivalent time for any moment in London. The input bar accepts natural language like "3pm", "15:30", or "9am Rome" for instant conversions.