BST to Sydney
+9hBST
BSTSOURCESydney
AESTGreen rows indicate typical business hours (9 AM - 5 PM)
BST and AEST on the World Map
The map below highlights the BST (British Summer Time) and AEST (Australian Eastern Standard Time) timezone regions across the globe.
BST – British Summer Time
UTC+01:00British Summer Time (BST, UTC+01:00) is the daylight saving period in the United Kingdom, running from late March to late October.
- •BST runs from the last Sunday in March to the last Sunday in October.
- •BST is exactly one hour ahead of GMT, the UK's standard time.
- •During BST, London is 4 hours ahead of New York while the US is on Eastern Daylight Time.
- •The Isle of Man and the Channel Islands also observe BST.
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 Sydney
WikipediaSydney operates on Australian Eastern Standard Time (AEST/AEDT). As Australia's financial capital, Sydney opens global markets at the start of the business day.
Sydney is one of the first major cities to welcome the New Year.
BST to Sydney Time Difference – Complete Guide
BST runs on British Summer Time (BST) at UTC+01:00. Sydney runs on Australian Eastern Standard Time (AEST) at UTC+10:00. That puts BST 9 hours ahead of Sydney — a difference of +9h at the current offsets.
In practice, when it is 9:00 AM in BST it is 6:00 PM in Sydney. Midnight in BST is 9:00 AM in Sydney. Neither zone observes daylight saving time, so the offset between them stays constant all year.
BST to Sydney time conversion table
| BST (BST) | Sydney (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 BST to Sydney time
- Scheduling a call from BST to Sydney: a 10:00 AM start in BST lands at 7:00 PM in Sydney, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +9h gap: BST and Sydney 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 Sydney is 6:00 PM in BST.
- Booking travel or deliveries: tracking Sydney local time against BST 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 BST takes the early slot, the next week Sydney does.
- Sydney: Clocks spring forward on Sat, Oct 3, 2026. Any meeting series spanning that date will shift by an hour in local time.
About BST (British Summer Time)
British Summer Time (BST) is the daylight saving period in the United Kingdom, when clocks move one hour forward from Greenwich Mean Time (GMT, UTC+00:00) to UTC+01:00. It runs from the last Sunday in March to the last Sunday in October. England, Scotland, Wales and Northern Ireland all follow it, along with the Isle of Man and the Channel Islands of Jersey and Guernsey. During BST, London is one hour ahead of UTC, four hours ahead of New York on Eastern Daylight Time, and five hours ahead of New York once the United States returns to Eastern Standard Time in November. BST is also used to abbreviate Bangladesh Standard Time (UTC+06:00), which is listed separately on this site.
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 BST and Sydney
With a +9h offset there is no overlap inside a normal 9 AM – 5 PM day. Sydney opens at 9:00 AM AEST, which is 6:00 PM in BST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
BST and Sydney have no shared working hours because of the +9h gap. Teams need to alternate early starts or rely on asynchronous handovers.
BST is 9 hours ahead of Sydney (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
BST
☀ Currently in DST
Standard: UTC+00:00 · DST: UTC+01:00
Clocks fall back on Sun, Oct 25, 2026
Sydney
❄ 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 BST and Sydney?
BST (BST, UTC+01:00) is 9 hours ahead of Sydney (AEST, UTC+10:00). The gap is currently +9h.
How do I convert BST time to Sydney time?
Add +9h to BST local time. For example, 9:00 AM in BST is 6:00 PM in Sydney.
What time is it in Sydney right now?
Sydney 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 BST.
What is the best time to call Sydney from BST?
There is no shared working-hours window because of the +9h gap. The closest option is 1:00 PM in BST, which is 10:00 PM in Sydney.
Which is ahead, BST or Sydney?
BST is 9 hours ahead of Sydney. When it is 12:00 PM in BST it is 9:00 PM in Sydney.
Do BST and Sydney use different time zones?
BST uses BST at UTC+01:00, while Sydney (Australia) uses AEST at UTC+10:00. The IANA identifiers are Europe/London and Australia/Sydney.
Does daylight saving time affect the BST–Sydney difference?
Neither zone observes daylight saving time, so the +9h offset between BST and Sydney is fixed all year.
Which other cities share BST's time zone?
BST also covers London, Birmingham, Manchester, Glasgow, Edinburgh, Cardiff, Belfast, Liverpool and 2 more.
Which countries use BST, BST's zone?
BST is used in United Kingdom.
Is there a day difference between BST and Sydney?
Not normally. The +9h gap only pushes the date over for late-evening times.
What is the time difference between BST and Sydney?
Sydney is +9h from BST.
What timezone is BST in?
BST operates on its local timezone.
What timezone is Sydney in?
Sydney operates on Australian Eastern Standard Time (AEST/AEDT). As Australia's financial capital, Sydney opens global markets at the start of the business day.
What are the business hours in Sydney?
Standard business hours in Sydney are 9:00 AM - 5:00 PM AEST.
Which countries use BST (British Summer Time)?
BST is used in United Kingdom.
Does BST observe daylight saving time?
Yes, BST switches to BST during summer months.
What are some interesting facts about BST?
BST runs from the last Sunday in March to the last Sunday in October. BST is exactly one hour ahead of GMT, the UK's standard time.
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 BST, what time is it in Sydney?
When it is 12:00 AM (midnight) in BST (BST), it is +9h later in Sydney (AEST).
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