BST
British Summer Time
GMT +1
CDT
Cuba Daylight Time
GMT -4

Time Difference

British Summer Time is 5 hours ahead of Cuba Daylight Time
2:30 am02:30 in BST is 9:30 pm21:30 in CDT

BST to CDT call time
Best time for a conference call or a meeting is between 1pm-6pm in BST which corresponds to 8am-1pm in CDT

2:30 am02:30 British Summer Time (BST). Offset UTC +1:00 hour
9:30 pm21:30 Cuba Daylight Time (CDT). Offset UTC -4:00 hours

2:30 am02:30 BST / 9:30 pm21:30 CDT

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

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

BST Time Zone Geo Map
BST timezone map

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).

Daylight saving time clock moves forward for one hour from 1am to 2amStart: British Summer Time (BST) started on Sunday, March 26, 2023 at 1:00 am local time and clocks were set one hour forward to Sunday, March 26, 2023, 2:00 am. Daylight saving starts annually the on last Sunday of March

Daylight saving time clock moves back for one hour from 2am to 1amEnd: British Summer Time (BST) ends on Sunday, October 29, 2023 at 2:00 am local time and clocks are set one hour back to Sunday, October 29, 2023, 1:00 am local standard time instead. Daylight saving ends annually the on last Sunday of October

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
  • Bangladesh Standard Time - UTC +6
  • Bougainville Standard Time - UTC +11
  • Brasilia Standard Time - UTC -3
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 - Mitteleurop√ɬ§ische Zeit
  • WAT - West Africa Time
  • WST - Western Sahara Summer Time
  • BMT - Biel Mean Time

Cuba Daylight Time

Offset: CDT is 4 hours behind Greenwich Mean Time (GMT) and is used in Caribbean

Countries: It is used in following countries: Cuba

Principal Cities: The largest city in the CDT timezone is Havana from Cuba with population about 2.164 million people. Other major cities in the area are Santiago de Cuba, Camaguey, Holguin, Guantanamo

Daylight Saving: Cuba Daylight Time (CDT) is a daylight saving/summer timezone, however during winter some places switch clocks for one hour back and observe Cuba Standard Time (CST).

Daylight saving time clock moves forward for one hour from 12am to 1amStart: Cuba Daylight Time (CDT) started on Sunday, March 12, 2023 at 12:00 am local time and clocks were set one hour forward to Sunday, March 12, 2023, 1:00 am. Daylight saving starts annually the on second Sunday of March

Daylight saving time clock moves back for one hour from 1am to 12amEnd: Cuba Daylight Time (CDT) ends on Sunday, November 5, 2023 at 1:00 am local time and clocks are set one hour back to Sunday, November 5, 2023, 12:00 am local standard time instead. Daylight saving ends annually the on first Sunday of November

CDT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -04 - basic short
  • -0400 - basic
  • -04:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0400 - sign character (-) followed by a four digit time providing hours (04) and minutes (00) of the offset. Indicates four hour and zero minutes time differences to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Quebec - Military abbreviation for CDT
  • Q - short form of 'Quebec'
IANA/Olson: Reflects CDT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Havana
  • Cuba
CDT Abbreviation: Several time zones share CDT abbreviation and it could refer to these time zones
  • Central Daylight Time - UTC -5
  • Cuba Daylight Time - UTC -4
Time zones with the GMT -4 offset:
  • AST - Atlantic Standard Time
  • EDT - Eastern Daylight Time
  • AMT - Amazon Time
  • BOT - Bolivia Time
  • CDT - Cuba Daylight Time
  • CLT - Chile Standard Time
  • FKT - Falkland Island Time
  • GYT - Guyana Time
  • HLV - Hora Legal de Venezuela
  • PYT - Paraguay Time
  • Q - Quebec Time Zone
  • VET - Venezuelan Standard Time