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BST
British Summer Time
GMT +1:00 h
AHDT
Alaska-Hawaii Daylight Time
GMT -9:00 h

Time Difference

British Summer Time is 10 hours ahead of Alaska-Hawaii Daylight Time
So 9:06 PM21:06 in BST is 11:06 AM11:06 in AHDT

9:06 PM21:06 British Summer Time (BST). Offset UTC +1:00 hour
11:06 AM11:06 Alaska-Hawaii Daylight Time (AHDT). Offset UTC -9:00 hours

9:06 PM21:06 BST / 11:06 AM11:06 AHDT

BST AHDT
12am (midnight) 2pm
1am 3pm
2am 4pm
3am 5pm
4am 6pm
5am 7pm
6am 8pm
7am 9pm
8am 10pm
9am 11pm
10am 12am (midnight)
11am 1am
12pm (noon) 2am
1pm 3am
2pm 4am
3pm 5am
4pm 6am
5pm 7am
6pm 8am
7pm 9am
8pm 10am
9pm 11am
10pm 12pm (noon)
11pm 1pm
0:00 14:00
1:00 15:00
2:00 16:00
3:00 17:00
4:00 18:00
5:00 19:00
6:00 20:00
7:00 21:00
8:00 22:00
9:00 23:00
10:00 0:00
11:00 1:00
12:00 2:00
13:00 3:00
14:00 4:00
15:00 5:00
16:00 6:00
17:00 7:00
18:00 8:00
19:00 9:00
20:00 10:00
21:00 11:00
22:00 12:00
23:00 13:00

British Summer Time

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

Countries: It is used in following countries: Britain (UK), Guernsey, Isle of Man, Jersey

Principal Cities: The largest city in the BST timezone is London from United Kingdom with population about 7.557 million people. Other major cities in the area are Birmingham, Glasgow, Liverpool, Saint Helier

Daylight Saving: British Summer Time (BST) is a daylight saving/summer timezone, however during winter some places switch clocks for one hour back and observe Greenwich Mean Time (GMT).

Start: British Summer Time (BST) starts annually on the same date and time. and clocks were set one hour forward on Sunday, March 31, 2019, at 1:00 (1:00 am) local time.

End: British Summer Time (BST) ends annually on the same date and time. and clocks are set one hour back on Sunday, October 27, 2019, at 2:00 (2:00 am) local time.

BST Time Zone Geo Map
BST timezone map
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 one hour and zero minutes time differences 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 +1:00 h
  • Bangladesh Standard Time - UTC +6:00 h
  • Bougainville Standard Time - UTC +11:00 h

Time zones with the GMT +1:00 h 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 - Mitteleurop√ɬ§ische Zeit
  • WAT - West Africa Time
  • WST - Western Sahara Summer Time
  • BMT - Biel Mean Time
  • +01 -