Sydney
London
Convert AEST to BST
Australian Eastern Standard Time to British Summer Time — London is 9 hours behind Sydney
Quick Facts
Time Difference
-9 hours
AEST Full Name
Australian Eastern Standard Time
BST Full Name
British Summer Time
AEST to BST Conversion Table
Related Conversions
About AEST and BST Time Zones
AEST (Australian Eastern Standard Time) is UTC+10 and covers cities like Sydney, Melbourne, Brisbane. BST (British Summer Time) is UTC+1 and covers cities like London, Edinburgh, Cardiff.
When it's 12:00 PM (noon) in Sydney (AEST), it's 3:00 AM in London (BST). The time difference between AEST and BST is 9 hours — London is behind Sydney.
The 9-hour difference makes real-time overlap challenging — early morning calls (7–9 AM AEST) work best.
Daylight Saving Time
AEST observes Daylight Saving Time and becomes AEDT (Australian Eastern Daylight Time) during summer months, shifting clocks forward by 1 hour to UTC+11.
During DST transitions, the time difference between AEST and BST may shift by ±1 hour. Always verify the current offset above for the most accurate conversion.
Use our world clock tool to compare Sydney and London with a visual timeline, or browse more timezone conversions.
Frequently Asked Questions
What is the time difference between AEST and BST?
London (BST) is 9 hours behind Sydney (AEST). The offset is -9 hours.
Is BST ahead or behind AEST?
BST is 9 hours behind AEST. AEST is UTC+10 and BST is UTC+1.
When it's 12:00 PM in Sydney, what time is it in London?
When it's 12:00 PM (noon) in Sydney (AEST), it's 3:00 AM in London (BST).
When it's 5:00 PM in Sydney, what time is it in London?
When it's 5:00 PM in Sydney (AEST), it's 8:00 AM in London (BST).
Does AEST change for Daylight Saving Time?
Yes. AEST (Australian Eastern Standard Time, UTC+10) becomes AEDT (Australian Eastern Daylight Time, UTC+11) in summer, shifting clocks forward 1 hour.