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SST
Samoa Standard Time
GMT -11
12am
3am
6am
9am
12pm
3pm
6pm
9pm
BST
British Summer Time
GMT +1
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

1:00 am SST (UTC-11), Oct 3, 2026 = 1:00 pm BST (UTC+1), Oct 3, 202601:00 SST (UTC-11), Oct 3, 2026 = 13:00 BST (UTC+1), Oct 3, 2026

SST is 12 hours behind BST.

SST and BST examples

These examples always use SST (UTC-11) 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.

SST is 12 hours behind BST.

How the time difference changes

For most of the year, SST is 12 hours behind BST. At other times of the year, SST is 11 hours behind GMT.

For most of the year, working hours of 9:00 am to 5:00 pm in SST correspond to 9:00 pm to 5:00 am (next day) in BST. At other times of the year, working hours of 9:00 am to 5:00 pm in SST correspond to 8:00 pm to 4:00 am (next day) in GMT.For most of the year, working hours of 09:00 to 17:00 in SST correspond to 21:00 to 05:00 (next day) in BST. At other times of the year, working hours of 09:00 to 17:00 in SST correspond to 20:00 to 04:00 (next day) in GMT.

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

Time Difference

Samoa Standard Time is 12 hours behind British Summer Time
1:00 am01:00 in SST is 1:00 pm13:00 in BST

SST to BST call time
Best time for a conference call or a meeting is between 7am-8am07:00-08:00 in SST which corresponds to 7pm-8pm19:00-20:00 in BST

1:00 am01:00 Samoa Standard Time (SST). Offset UTC -11:00 hours
1:00 pm13:00 British Summer Time (BST). Offset UTC +1:00 hour

1:00 am01:00 SST / 1:00 pm13:00 BST

SSTBST
12am (midnight)12pm (noon)
1am1pm
2am2pm
3am3pm
4am4pm
5am5pm
6am6pm
7am7pm
8am8pm
9am9pm
10am10pm
11am11pm
12pm (noon)12am (midnight)
1pm1am
2pm2am
3pm3am
4pm4am
5pm5am
6pm6am
7pm7am
8pm8am
9pm9am
10pm10am
11pm11am
00:0012:00
01:0013:00
02:0014:00
03:0015:00
04:0016:00
05:0017:00
06:0018:00
07:0019:00
08:0020:00
09:0021:00
10:0022:00
11:0023:00
12:0000:00
13:0001:00
14:0002:00
15:0003:00
16:0004:00
17:0005:00
18:0006:00
19:0007:00
20:0008:00
21:0009:00
22:0010:00
23:0011:00

Samoa Standard Time

Offset: SST is 11 hours behind Greenwich Mean Time (GMT) and is used in Pacific

Countries using this time zone: Samoa (American), US minor outlying islands

Principal Cities: The largest city in the SST time zone is Pago Pago in American Samoa, with about 11,500 people.

Daylight Saving: Clocks in Samoa Standard Time (SST) do not change for daylight saving time, so SST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.

SST Time Zone Geo Map
SST timezone map

SST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -11 - basic short
  • -1100 - basic
  • -11:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -1100 - sign character (-) followed by a four digit time providing hours (11) and minutes (00) of the offset. Indicates an offset of eleven hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • X-ray - Military abbreviation for SST
  • X - short form of 'X-ray'
IANA/Olson: Reflects SST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Pacific/Midway
  • Pacific/Pago_Pago
  • Pacific/Samoa
  • US/Samoa
Time zones with the GMT -11 offset:
  • NUT - Niue Time
  • SST - Samoa Standard Time
  • X - X-ray Time Zone

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