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BST to ACDT Converter

Updating current time…
BST
British Summer Time
GMT +1
12am
3am
6am
9am
12pm
3pm
6pm
9pm
ACDT
Australian Central Daylight Time
GMT +10:30
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

1:00 pm13:00 BST (UTC+1), Oct 7, 2026 = 10:30 pm22:30 ACDT (UTC+10:30), Oct 7, 2026

BST is 9 hours and 30 minutes behind ACDT.

BST and ACDT examples

These examples always use BST (UTC+1) and ACDT (UTC+10:30). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

BST is 9 hours and 30 minutes behind ACDT.

How the time difference changes

Depending on seasonal clock changes, BST is 8 hours and 30 minutes behind ACST, BST is 9 hours and 30 minutes behind ACDT, or GMT is 10 hours and 30 minutes behind ACDT.

Depending on seasonal clock changes, working hours of 9:00 am to 5:00 pm in BST correspond to 5:30 pm to 1:30 am (next day) in ACST, working hours of 9:00 am to 5:00 pm in BST correspond to 6:30 pm to 2:30 am (next day) in ACDT, or working hours of 9:00 am to 5:00 pm in GMT correspond to 7:30 pm to 3:30 am (next day) in ACDT.Depending on seasonal clock changes, working hours of 09:00 to 17:00 in BST correspond to 17:30 to 01:30 (next day) in ACST, working hours of 09:00 to 17:00 in BST correspond to 18:30 to 02:30 (next day) in ACDT, or working hours of 09:00 to 17:00 in GMT correspond to 19:30 to 03:30 (next day) in ACDT.

Compare BST time with ACDT time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

British Summer Time is 9 hours and 30 minutes behind Australian Central Daylight Time.
1:00 pm13:00 in BST is 10:30 pm22:30 in ACDT

BST to ACDT call time
Best time for a conference call or a meeting is between 8am-9am08:00-09:00 in BST which corresponds to 5:30pm-6:30pm17:30-18:30 in ACDT

1:00 pm13:00 British Summer Time (BST). Offset UTC +1:00 hour
10:30 pm22:30 Australian Central Daylight Time (ACDT). Offset UTC +10:30 hours

1:00 pm13:00 BST / 10:30 pm22:30 ACDT

BSTACDT
12:00am9:30am
1:00am10:30am
2:00am11:30am
3:00am12:30pm
4:00am1:30pm
5:00am2:30pm
6:00am3:30pm
7:00am4:30pm
8:00am5:30pm
9:00am6:30pm
10:00am7:30pm
11:00am8:30pm
12:00pm9:30pm
1:00pm10:30pm
2:00pm11:30pm
3:00pm12:30am
4:00pm1:30am
5:00pm2:30am
6:00pm3:30am
7:00pm4:30am
8:00pm5:30am
9:00pm6:30am
10:00pm7:30am
11:00pm8:30am
00:0009:30
01:0010:30
02:0011:30
03:0012:30
04:0013:30
05:0014:30
06:0015:30
07:0016:30
08:0017:30
09:0018:30
10:0019:30
11:0020:30
12:0021:30
13:0022:30
14:0023:30
15:0000:30
16:0001:30
17:0002:30
18:0003:30
19:0004:30
20:0005:30
21:0006:30
22:0007:30
23:0008:30

British Summer Time

Offset: BST is 1 hour ahead Greenwich Mean Time (GMT) and is used in Europe

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 United Kingdom, with about 8.962 million people. Other major cities in this time zone include Birmingham, Glasgow, Liverpool, Saint Helier.

BST Time Zone Geo Map
BST timezone map

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).

Daylight saving time clock moves forward for one hourStart: 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.

Daylight saving time clock moves back for one hourEnd: 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.

See upcoming clock changes worldwide.

BST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +01 - basic short
  • +0100 - basic
  • +01:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +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.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Alpha - Military abbreviation for BST
  • A - short form of 'Alpha'
IANA/Olson: Reflects BST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Europe/Belfast
  • Europe/Guernsey
  • Europe/Isle_of_Man
  • Europe/Jersey
  • Europe/London
  • GB
  • GB-Eire
BST Abbreviation: Several time zones share BST abbreviation and it could refer to these time zones
  • British Summer Time - UTC +1
  • Bangladesh Standard Time - UTC +6
  • Bougainville Standard Time - UTC +11
Time zones with the GMT +1 offset:
  • 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

Australian Central Daylight Time

Offset: ACDT is 10 hours and 30 minutes ahead Greenwich Mean Time (GMT) and is used in Australia

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 Adelaide Hills, Mount Gambier, Morphett Vale, Broken Hill.

ACDT Time Zone Geo Map
ACDT timezone map

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).

Daylight saving time clock moves forward for one hourStart: 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.

Daylight saving time clock moves back for one hourEnd: 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.

See upcoming clock changes worldwide.

ACDT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +1030 - basic
  • +10:30 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +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.
IANA/Olson: Reflects ACDT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Australia/Adelaide
  • Australia/Broken_Hill
  • Australia/South
  • Australia/Yancowinna
Time zones with the GMT +10:30 offset:
  • ACDT - Australian Central Daylight Time
  • LHST - Lord Howe Standard Time
EST to ISTGMT to ESTPST to ESTEST to GMTPST to GMT