AEST to BST
-9hAEST
AESTSOURCEBST
BSTGreen rows indicate typical business hours (9 AM - 5 PM)
AEST and BST on the World Map
The map below highlights the AEST (Australian Eastern Standard Time) and BST (British Summer Time) timezone regions across the globe.
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.
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.
Time Conversion Guide: AEST to BST
AEST runs on Australian Eastern Standard Time (AEST) at UTC+10:00. BST runs on British Summer Time (BST) at UTC+01:00. That puts AEST 9 hours behind BST — a difference of -9h at the current offsets.
In practice, when it is 9:00 AM in AEST it is 12:00 AM in BST. Midnight in AEST is 3:00 PM in BST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
AEST to BST time conversion table
| AEST (AEST) | BST (BST) | Day |
|---|---|---|
| 12:00 AM | 3:00 PM | previous day |
| 6:00 AM | 9:00 PM | previous day |
| 7:00 AM | 10:00 PM | previous day |
| 8:00 AM | 11:00 PM | previous day |
| 9:00 AM | 12:00 AM | same day |
| 12:00 PM | 3:00 AM | same day |
| 3:00 PM | 6:00 AM | same day |
| 5:00 PM | 8:00 AM | same day |
| 6:00 PM | 9:00 AM | same day |
| 9:00 PM | 12:00 PM | same day |
Why people convert AEST to BST time
- Scheduling a call from AEST to BST: a 10:00 AM start in AEST lands at 1:00 AM in BST, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -9h gap: AEST and BST 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 BST is 12:00 AM in AEST.
- Keeping family and friends in sync: knowing that 8:00 PM in AEST is 11:00 AM in BST makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM AEST" 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 AEST takes the early slot, the next week BST does.
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.
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.
Best time to call between AEST and BST
With a -9h offset there is no overlap inside a normal 9 AM – 5 PM day. BST opens at 9:00 AM BST, which is 12:00 AM in AEST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
AEST and BST have no shared working hours because of the -9h gap. Teams need to alternate early starts or rely on asynchronous handovers.
AEST is 9 hours behind BST (AEST UTC+10:00 → BST UTC+01:00). 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
AEST
❄ Currently in Standard Time
Standard: UTC+10:00 · DST: UTC+11:00
Clocks spring forward on Sat, Oct 3, 2026
BST
☀ Currently in DST
Standard: UTC+00:00 · DST: UTC+01:00
Clocks fall back on Sun, Oct 25, 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 AEST and BST?
AEST (AEST, UTC+10:00) is 9 hours behind BST (BST, UTC+01:00). The gap is currently -9h.
How do I convert AEST time to BST time?
Add -9h to AEST local time. For example, 9:00 AM in AEST is 12:00 AM in BST.
What time is it in BST right now?
BST 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 -9h offset from AEST.
What is the best time to call BST from AEST?
There is no shared working-hours window because of the -9h gap. The closest option is 1:00 PM in AEST, which is 4:00 AM in BST.
Which is behind, AEST or BST?
AEST is 9 hours behind BST. When it is 12:00 PM in AEST it is 3:00 AM in BST.
Does daylight saving time affect the AEST–BST difference?
Neither zone observes daylight saving time, so the -9h offset between AEST and BST is fixed all year.
Which other cities share AEST's time zone?
AEST also covers Sydney, Melbourne, Brisbane, Canberra, Hobart, Gold Coast.
Which countries use AEST, AEST's zone?
AEST is used in Australia (NSW, VIC, QLD, TAS, ACT), Papua New Guinea.
Is there a day difference between AEST and BST?
Not normally. The -9h gap only pushes the date over the previous day.
What is the time difference between AEST and BST?
BST is -9h from AEST.
What timezone is AEST in?
AEST operates on its local timezone.
What timezone is BST in?
BST operates on its local timezone.
Which countries use AEST (Australian Eastern Standard Time)?
AEST is used in Australia (NSW, VIC, QLD, TAS, ACT), Papua New Guinea.
Does AEST observe daylight saving time?
Yes, AEST switches to AEDT during summer months.
What are some interesting facts about AEST?
Queensland does not observe daylight saving time, staying on AEST year-round. Sydney and Melbourne switch to AEDT (UTC+11:00) in summer.
Which cities are in the BST timezone?
Major cities in the BST timezone include London, Birmingham, Manchester, Glasgow, Edinburgh, Cardiff, Belfast, Liverpool.
What is the UTC offset for BST?
British Summer Time (BST) is at UTC+01:00. During daylight saving time, it shifts to BST.
What should I know about the BST timezone?
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.
When is it midnight in AEST, what time is it in BST?
When it is 12:00 AM (midnight) in AEST (AEST), it is -9h later in BST (BST).
Related Developer Tools
Explore more tools that work great with timezone conversions for international teams:
Related Timezone Conversions
More AEST time conversions
- aest to sydney
- aest to aedt
- aest to new york
- aest to london
- aest to dubai
- aest to tokyo
- aest to singapore
- aest to los angeles
- aest to paris
- aest to delhi
- aest to mumbai
- aest to berlin
- aest to hong kong
- aest to toronto
- aest to kathmandu
- new york to aest
- london to aest
- dubai to aest
- tokyo to aest
- singapore to aest
- sydney to aest
- los angeles to aest
- paris to aest
- delhi to aest
- mumbai to aest
- berlin to aest
- hong kong to aest
- toronto to aest
- kathmandu to aest
See every conversion from AEST →·See every conversion from BST →