ACDT to BST Converter
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Add one or more places to compare local times, adjust the date, and share the result.
Quick answers
Selected conversion
10:30 pm22:30 ACDT (UTC+10:30), Oct 14, 2026 = 1:00 pm13:00 BST (UTC+1), Oct 14, 2026
ACDT is 9 hours and 30 minutes ahead of BST.
ACDT and BST examples
These examples always use ACDT (UTC+10:30) and BST (UTC+1). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
ACDT is 9 hours and 30 minutes ahead of BST.
How the time difference changes
Depending on seasonal clock changes, ACST is 8 hours and 30 minutes ahead of BST, ACDT is 9 hours and 30 minutes ahead of BST, or ACDT is 10 hours and 30 minutes ahead of GMT.
Depending on seasonal clock changes, working hours of 9:00 am to 5:00 pm in ACST correspond to 12:30 am to 8:30 am in BST, working hours of 9:00 am to 5:00 pm in ACDT correspond to 11:30 pm (previous day) to 7:30 am in BST, or working hours of 9:00 am to 5:00 pm in ACDT correspond to 10:30 pm (previous day) to 6:30 am in GMT.Depending on seasonal clock changes, working hours of 09:00 to 17:00 in ACST correspond to 00:30 to 08:30 in BST, working hours of 09:00 to 17:00 in ACDT correspond to 23:30 (previous day) to 07:30 in BST, or working hours of 09:00 to 17:00 in ACDT correspond to 22:30 (previous day) to 06:30 in GMT.
Compare ACDT time with BST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Australian Central Daylight Time is 9 hours and 30 minutes ahead of British Summer Time.
10:30 pm22:30 in ACDT is 1:00 pm13:00 in BST
ACDT to BST call time
Best time for a conference call or a meeting is between 5:30pm-6:30pm17:30-18:30 in ACDT which corresponds to 8am-9am08:00-09:00 in BST. Their 9am–5pm09:00–17:00 working hours do not overlap; this is a suggested compromise.
10:30 pm22:30 Australian Central Daylight Time (ACDT). Offset UTC +10:30 hours
1:00 pm13:00 British Summer Time (BST). Offset UTC +1:00 hour
10:30 pm22:30 ACDT / 1:00 pm13:00 BST
Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.
| ACDT | BST |
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| 2:30pm previous day | |
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Australian Central Daylight Time
Offset: ACDT is 10 hours and 30 minutes ahead of Greenwich Mean Time (GMT).
Countries using this time zone: Australia
Principal Cities: The largest city in the ACDT time zone is Adelaide in Australia, with about 1.469 million people. Other major cities in this time zone include Mount Gambier, Mount Barker, Whyalla, Gawler.
Today all shaded areas are on ACDT.
Daylight Saving: Australian Central Daylight Time (ACDT) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Australian Central Standard Time (ACST).
Start: Australian Central Daylight Time (ACDT) started on Sunday, October 4, 2026 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, October 4, 2026, 3:00 am03:00. Daylight saving starts annually on the first Sunday of October.
End: Australian Central Daylight Time (ACDT) ends on Sunday, April 4, 2027 at 3:00 am03:00 local time and clocks are set one hour back to Sunday, April 4, 2027, 2:00 am02:00 local standard time instead. Daylight saving ends annually on the first Sunday of April.
ACDT representations, usage and related time zones
- +1030 - basic
- +10:30 - extended
- +1030 - sign character (+) followed by a four digit time providing hours (10) and minutes (30) of the offset. Indicates an offset of ten hours and thirty minutes to the east of the zero meridian.
- Australia/Adelaide
- Australia/Broken_Hill
- Australia/South
- Australia/Yancowinna
- ACDT - Australian Central Daylight Time
- LHST - Lord Howe Standard Time
British Summer Time
Offset: BST is 1 hour ahead of Greenwich Mean Time (GMT).
Countries using this time zone: Britain (UK), Guernsey, Isle of Man, Jersey
Principal Cities: The largest city in the BST time zone is London in the United Kingdom, with about 8.962 million people. Other major cities in this time zone include Birmingham, Glasgow, Manchester, Sheffield.
Today all shaded areas are on BST.
Daylight Saving: British Summer Time (BST) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Greenwich Mean Time (GMT).
Start: British Summer Time (BST) started on Sunday, March 29, 2026 at 1:00 am01:00 local time and clocks were set one hour forward to Sunday, March 29, 2026, 2:00 am02:00. Daylight saving starts annually on the last Sunday of March.
End: British Summer Time (BST) ends on Sunday, October 25, 2026 at 2:00 am02:00 local time and clocks are set one hour back to Sunday, October 25, 2026, 1:00 am01:00 local standard time instead. Daylight saving ends annually on the last Sunday of October.
BST representations, usage and related time zones
- +01 - basic short
- +0100 - basic
- +01:00 - extended
- +0100 - sign character (+) followed by a four digit time providing hours (01) and minutes (00) of the offset. Indicates an offset of one hour to the east of the zero meridian.
- Alpha - Military abbreviation for BST
- A - short form of 'Alpha'
- Europe/Belfast
- Europe/Guernsey
- Europe/Isle_of_Man
- Europe/Jersey
- Europe/London
- GB
- GB-Eire
- British Summer Time - UTC +1
- Bangladesh Standard Time - UTC +6
- Bougainville Standard Time - UTC +11
- BST - British Summer Time
- CET - Central European Time
- IST - Irish Standard Time
- WEST - Western European Summer Time
- A - Alpha Time Zone
- CET - Central European Time
- MEZ - Mitteleuropäische Zeit
- WAT - West Africa Time
- WST - Western Sahara Summer Time
- BMT - Biel Mean Time