London to AEST
+9hLondon
BSTSOURCEAEST
AESTGreen rows indicate typical business hours (9 AM - 5 PM)
BST and AEST on the World Map
The map below highlights the BST (Greenwich Mean Time) and AEST (Australian Eastern Standard Time) timezone regions across the globe.
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.
AEST – Australian Eastern Standard Time
UTC+10:00Australian Eastern Standard Time (AEST) covers eastern Australia, 10 hours ahead of UTC.
- •Queensland does not observe daylight saving time, staying on AEST year-round.
- •Sydney and Melbourne switch to AEDT (UTC+11:00) in summer.
- •The Australian Securities Exchange (ASX) operates on AEST/AEDT.
- •AEST is 15 hours ahead of EST during winter.
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.
London to AEST Time Difference – Complete Guide
London runs on British Summer Time (BST) at UTC+01:00, currently observing daylight saving time. AEST runs on Australian Eastern Standard Time (AEST) at UTC+10:00. That puts London 9 hours ahead of AEST — a difference of +9h at the current offsets.
In practice, when it is 9:00 AM in London it is 6:00 PM in AEST. Midnight in London is 9:00 AM in AEST.London observes daylight saving time while AEST does not, so the gap narrows or widens by an hour part of the year.
London to AEST time conversion table
| London (BST) | AEST (AEST) | Day |
|---|---|---|
| 12:00 AM | 9:00 AM | same day |
| 6:00 AM | 3:00 PM | same day |
| 7:00 AM | 4:00 PM | same day |
| 8:00 AM | 5:00 PM | same day |
| 9:00 AM | 6:00 PM | same day |
| 12:00 PM | 9:00 PM | same day |
| 3:00 PM | 12:00 AM | next day |
| 5:00 PM | 2:00 AM | next day |
| 6:00 PM | 3:00 AM | next day |
| 9:00 PM | 6:00 AM | next day |
Why people convert London to AEST time
- Scheduling a call from London to AEST: a 10:00 AM start in London lands at 7:00 PM in AEST, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +9h gap: London and AEST have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in AEST is 6:00 PM in London.
- Booking travel or deliveries: tracking AEST local time against London keeps pickup windows and arrival estimates honest across the +9h offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM BST" is unambiguous; "3 PM" across a +9h gap is not.
- With a +9h gap there is no shared 9-to-5 window, so alternate the early start: one week London takes the early slot, the next week AEST does.
- London: Clocks fall back on Sun, Oct 25, 2026. Re-check this page after that date because the offset changes and so does the +9h gap.
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.
About AEST (Australian Eastern Standard Time)
Australian Eastern Standard Time (AEST) is used in the eastern states of Australia including New South Wales, Victoria, Queensland, Tasmania, and the ACT. During summer (October to April), NSW, VIC, TAS, and ACT switch to Australian Eastern Daylight Time (AEDT, UTC+11:00), while Queensland remains on AEST year-round.
Best time to call between London and AEST
With a +9h offset there is no overlap inside a normal 9 AM – 5 PM day. AEST opens at 9:00 AM AEST, which is 6:00 PM in London, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
London and AEST have no shared working hours because of the +9h gap. Teams need to alternate early starts or rely on asynchronous handovers.
London is 9 hours ahead of AEST (BST UTC+01:00 → AEST UTC+10:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
London
☀ Currently in DST
Standard: UTC+00:00 · DST: UTC+01:00
Clocks fall back on Sun, Oct 25, 2026
AEST
❄ Currently in Standard Time
Standard: UTC+10:00 · DST: UTC+11:00
Clocks spring forward on Sat, Oct 3, 2026
⚠ These locations are currently in different DST states, so the time difference may change when clocks adjust.
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 London and AEST?
London (BST, UTC+01:00) is 9 hours ahead of AEST (AEST, UTC+10:00). The gap is currently +9h.
How do I convert London time to AEST time?
Add +9h to London local time. For example, 9:00 AM in London is 6:00 PM in AEST.
What time is it in AEST right now?
AEST uses AEST at UTC+10:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +9h offset from London.
What is the best time to call AEST from London?
There is no shared working-hours window because of the +9h gap. The closest option is 1:00 PM in London, which is 10:00 PM in AEST.
Which is ahead, London or AEST?
London is 9 hours ahead of AEST. When it is 12:00 PM in London it is 9:00 PM in AEST.
Do London and AEST use different time zones?
London (UK) uses BST at UTC+01:00, while AEST uses AEST at UTC+10:00. The IANA identifiers are Europe/London and Australia/Sydney.
Does daylight saving time affect the London–AEST difference?
Yes at the moment: London is on daylight saving time and AEST is not, so the +9h gap shifts by an hour when exactly one of them changes clocks.
Which other cities share London's time zone?
BST also covers London, Dublin, Lisbon, Accra, Reykjavik, Edinburgh, Casablanca, Dakar and 5 more.
Which countries use BST, London's zone?
BST is used in United Kingdom, Ireland, Iceland, Portugal (mainland), Ghana, Senegal, Mali, Mauritania and 7 more.
Is there a day difference between London and AEST?
Not normally. The +9h gap only pushes the date over for late-evening times.
What is the time difference between London and AEST?
AEST is +9h from London.
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 timezone is AEST in?
AEST operates on its local timezone.
What are the business hours in London?
Standard business hours in London are 9:00 AM - 5:00 PM GMT.
Which countries use GMT (Greenwich Mean Time)?
GMT is used in United Kingdom, Ireland, Iceland, Portugal (mainland), Ghana, Senegal, and 9 more countries.
Does GMT observe daylight saving time?
Yes, GMT switches to BST during summer months.
What are some interesting facts about GMT?
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.
Which cities are in the AEST timezone?
Major cities in the AEST timezone include Sydney, Melbourne, Brisbane, Canberra, Hobart, Gold Coast.
What is the UTC offset for AEST?
Australian Eastern Standard Time (AEST) is at UTC+10:00. During daylight saving time, it shifts to AEDT.
What should I know about the AEST timezone?
Queensland does not observe daylight saving time, staying on AEST year-round. Sydney and Melbourne switch to AEDT (UTC+11:00) in summer.
When is it midnight in London, what time is it in AEST?
When it is 12:00 AM (midnight) in London (GMT), it is +9h later in AEST (AEST).
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