BST to GMT to UTC Time Converter
The United Kingdom is on summer time: BST (UTC+1) until Sun, Oct 25.
Iceland and Ghana stay on GMT (UTC+0).
Quick answers
Selected conversion
1:00 pm13:00 BST (UTC+1), Oct 8, 2026 = 12:00 pm12:00 GMT (UTC+0), Oct 8, 2026 = 12:00 pm12:00 UTC (UTC+0), Oct 8, 2026
BST is 1 hour ahead of GMT. BST is 1 hour ahead of UTC.
How the time difference changes
BST to GMT
For most of the year, BST is 1 hour ahead of GMT. At other times of the year, the BST and GMT converter rows show the same time.
For most of the year, working hours of 9:00 am to 5:00 pm in BST correspond to 8:00 am to 4:00 pm in GMT. At other times of the year, working hours of 9:00 am to 5:00 pm on the BST converter row correspond to 9:00 am to 5:00 pm on the GMT converter row.For most of the year, working hours of 09:00 to 17:00 in BST correspond to 08:00 to 16:00 in GMT. At other times of the year, working hours of 09:00 to 17:00 on the BST converter row correspond to 09:00 to 17:00 on the GMT converter row.
BST to UTC
For most of the year, BST is 1 hour ahead of UTC. At other times of the year, GMT and UTC have the same time.
For most of the year, working hours of 9:00 am to 5:00 pm in BST correspond to 8:00 am to 4:00 pm in UTC. At other times of the year, working hours of 9:00 am to 5:00 pm in GMT correspond to 9:00 am to 5:00 pm in UTC.For most of the year, working hours of 09:00 to 17:00 in BST correspond to 08:00 to 16:00 in UTC. At other times of the year, working hours of 09:00 to 17:00 in GMT correspond to 09:00 to 17:00 in UTC.
Compare BST time with GMT and UTC time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
British Summer Time is 1 hour ahead of Greenwich Mean Time. British Summer Time is 1 hour ahead of Universal Time Coordinated.
1:00 pm13:00 in BST is 12:00 pm12:00 in GMT and is 12:00 pm12:00 in UTC
BST to GMT call time
Best time for a conference call or a meeting is between 10am-5pm10:00-17:00 in BST which corresponds to 9am-4pm09:00-16:00 in GMT
BST to UTC call time
Best time for a conference call or a meeting is between 10am-5pm10:00-17:00 in BST which corresponds to 9am-4pm09:00-16:00 in UTC
1:00 pm13:00 British Summer Time (BST). Offset UTC +1:00 hour
12:00 pm12:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
12:00 pm12:00 Universal Time Coordinated (UTC). Offset UTC 0:00 hours
1:00 pm13:00 BST / 12:00 pm12:00 GMT / 12:00 pm12:00 UTC
| BST | GMT | UTC |
|---|---|---|
| 12:00am | 11:00pm | 11:00pm |
| 1:00am | 12:00am | 12:00am |
| 2:00am | 1:00am | 1:00am |
| 3:00am | 2:00am | 2:00am |
| 4:00am | 3:00am | 3:00am |
| 5:00am | 4:00am | 4:00am |
| 6:00am | 5:00am | 5:00am |
| 7:00am | 6:00am | 6:00am |
| 8:00am | 7:00am | 7:00am |
| 9:00am | 8:00am | 8:00am |
| 10:00am | 9:00am | 9:00am |
| 11:00am | 10:00am | 10:00am |
| 12:00pm | 11:00am | 11:00am |
| 1:00pm | 12:00pm | 12:00pm |
| 2:00pm | 1:00pm | 1:00pm |
| 3:00pm | 2:00pm | 2:00pm |
| 4:00pm | 3:00pm | 3:00pm |
| 5:00pm | 4:00pm | 4:00pm |
| 6:00pm | 5:00pm | 5:00pm |
| 7:00pm | 6:00pm | 6:00pm |
| 8:00pm | 7:00pm | 7:00pm |
| 9:00pm | 8:00pm | 8:00pm |
| 10:00pm | 9:00pm | 9:00pm |
| 11:00pm | 10:00pm | 10:00pm |
| 00:00 | 23:00 | 23:00 |
| 01:00 | 00:00 | 00:00 |
| 02:00 | 01:00 | 01:00 |
| 03:00 | 02:00 | 02:00 |
| 04:00 | 03:00 | 03:00 |
| 05:00 | 04:00 | 04:00 |
| 06:00 | 05:00 | 05:00 |
| 07:00 | 06:00 | 06:00 |
| 08:00 | 07:00 | 07:00 |
| 09:00 | 08:00 | 08:00 |
| 10:00 | 09:00 | 09:00 |
| 11:00 | 10:00 | 10:00 |
| 12:00 | 11:00 | 11:00 |
| 13:00 | 12:00 | 12:00 |
| 14:00 | 13:00 | 13:00 |
| 15:00 | 14:00 | 14:00 |
| 16:00 | 15:00 | 15:00 |
| 17:00 | 16:00 | 16:00 |
| 18:00 | 17:00 | 17:00 |
| 19:00 | 18:00 | 18:00 |
| 20:00 | 19:00 | 19:00 |
| 21:00 | 20:00 | 20:00 |
| 22:00 | 21:00 | 21:00 |
| 23:00 | 22:00 | 22:00 |
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.
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
Greenwich Mean Time
Offset: GMT is 0 hours ahead Greenwich Mean Time (GMT) and is used in Europe
Countries using this time zone: Burkina Faso, Côte d'Ivoire, Britain (UK), Guernsey, Ghana, Greenland, Gambia, Guinea, Guinea-Bissau, Ireland, Isle of Man, Iceland, Jersey, Liberia, Mali, Mauritania, St Helena, Sierra Leone, Senegal, Sao Tome & Principe, Togo
Principal Cities: The largest city in the GMT time zone is London in United Kingdom, with about 8.962 million people. Other major cities in this time zone include Abidjan, Bamako, Dakar, Kumasi.
Greenwich Mean Time (GMT) originally referred to the mean solar time at the Royal Observatory in Greenwich, London. It is now often used to refer to Coordinated Universal Time (UTC) when this is viewed as a time zone, and in casual use for the most parts it is the same. In military GMT is known as Zulu time.Greenwich Mean Time was the same as Universal Time (UT), until the introduction of UTC in 1972 a standard astronomical concept used in many technical fields.
GMT representations, usage and related time zones
- Z - is the zone designator for the zero UTC/GMT offset, also known as 'Zulu' time
- +00 - basic short
- +0000 - basic
- +00:00 - extended
- +0000 - sign character (+) followed by a four digit time providing hours (00) and minutes (00) of the offset. Indicates the zero UTC/GMT offset.
- Zulu - Military abbreviation for GMT
- Z - short form of 'Zulu'
- Africa/Abidjan
- Africa/Accra
- Africa/Bamako
- Africa/Banjul
- Africa/Bissau
- Africa/Conakry
- Africa/Dakar
- Africa/Freetown
- Africa/Lome
- Africa/Monrovia
- Africa/Nouakchott
- Africa/Ouagadougou
- Africa/Sao_Tome
- Africa/Timbuktu
- America/Danmarkshavn
- Atlantic/Reykjavik
- Atlantic/St_Helena
- Eire
- Etc/GMT
- Etc/GMT+0
- Etc/GMT-0
- Etc/GMT0
- Etc/Greenwich
- Europe/Belfast
- Europe/Dublin
- Europe/Guernsey
- Europe/Isle_of_Man
- Europe/Jersey
- Europe/London
- GB
- GB-Eire
- GMT
- GMT+0
- GMT-0
- GMT0
- Greenwich
- Iceland
- EGST - Eastern Greenland Summer Time
- GMT - Greenwich Mean Time
- WET - Western European Time
- AZOST - Azores Summer Time
- UTC - Universal Time Coordinated
- WT - Western Sahara Standard Time
- Z - Zulu Time Zone
Universal Time Coordinated
Offset: UTC is 0 hours ahead Greenwich Mean Time (GMT) and is used in Universal
Coordinated Universal Time (UTC) is the world time standard that regulates clocks and time. It is successor to Greenwich Mean Time (GMT). For casual use, UTC is the same as GMT, but is used by the scientific community.
UTC is the time standard commonly used across the world since 1972. It is used in many technical fields, like aviation industry and meteorologists, also used to synchronize time across internet networks.
UTC representations, usage and related time zones
- Z - is the zone designator for the zero UTC/GMT offset, also known as 'Zulu' time
- +00 - basic short
- +0000 - basic
- +00:00 - extended
- +0000 - sign character (+) followed by a four digit time providing hours (00) and minutes (00) of the offset. Indicates the zero UTC/GMT offset.
- Zulu - Military abbreviation for UTC
- Z - short form of 'Zulu'
- Etc/UCT
- Etc/UTC
- Etc/Universal
- Etc/Zulu
- UCT
- UTC
- Universal
- Zulu
- EGST - Eastern Greenland Summer Time
- GMT - Greenwich Mean Time
- WET - Western European Time
- AZOST - Azores Summer Time
- UTC - Universal Time Coordinated
- WT - Western Sahara Standard Time
- Z - Zulu Time Zone