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UTC to London, United Kingdom to BST to GST

UTC
Universal Time Coordinated
GMT +0
London
United Kingdom
BST
BST
British Summer Time
GMT +1
GST
Gulf Standard Time
GMT +4

Time Difference

Universal Time Coordinated is 1 hours behind BST (British Summer Time) and 1 hours behind British Summer Time and 4 hours behind Gulf Standard Time
9:30 am09:30 in UTC is 10:30 am10:30 in London, United Kingdom and is 10:30 am10:30 in BST and is 1:30 pm13:30 in GST

UTC to London call time
Best time for a conference call or a meeting is between 8am-5pm in UTC which corresponds to 9am-6pm in London
UTC to BST call time
Best time for a conference call or a meeting is between 8am-5pm in UTC which corresponds to 9am-6pm in BST
UTC to GST call time
Best time for a conference call or a meeting is between 8am-2pm in UTC which corresponds to 12pm-6pm in GST

9:30 am09:30 Universal Time Coordinated (UTC). Offset UTC 0:00 hours
10:30 am10:30 BST (British Summer Time) (London, United Kingdom). Offset UTC +1:00 hour
10:30 am10:30 British Summer Time (BST). Offset UTC +1:00 hour
1:30 pm13:30 Gulf Standard Time (GST). Offset UTC +4:00 hours

9:30 am09:30 UTC / 10:30 am10:30 London, United Kingdom / 10:30 am10:30 BST / 1:30 pm13:30 GST

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

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

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • Z - is the zone designator for the zero UTC/GMT offset, also known as 'Zulu' time
  • +00 - basic short
  • +0000 - basic
  • +00:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0000 - sign character (+) followed by a four digit time providing hours (00) and minutes (00) of the offset. Indicates zero hour and zero minutes time differences of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Zulu - Military abbreviation for UTC
  • Z - short form of 'Zulu'
IANA/Olson: Reflects UTC time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Etc/UCT
  • Etc/UTC
  • Etc/Universal
  • Etc/Zulu
  • UCT
  • UTC
  • Universal
  • Zulu
Time zones with the GMT +0 offset:
  • 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

London Information

Time Zone

Abbreviation / Name
BST - British Summer Time
UTC / GMT Offset
+1:00 hour during British Summer Time, currently in use.

London Facts

Country
United Kingdom
Alternative Names
ILondon, LON, Lakana, Landan, Landen, Ljondan, Llundain, Lodoni, Londain, Londan, Londar, Londe, Londen, Londin, Londinium, Londino, Londn, London, London osh, Londona, Londonas, Londoni, Londono, Londons, Londonu, Londra, Londres, Londrez, Londri, Londro, Londye, Londyn, Londýn, Lonn, Lontoo, Loundres, Luan GJon, Lun-tun, Lunden, Lundra, Lundun, Lundunir, Lundúnir, Lung-dung, Lunnainn, Lunnin, Lunnon, Luân Đôn, Lùn-tûn, Lùng-dŭng, Lûn-tun, Lākana, Lůndůn, Lọndọnu, Ranana, Rānana, ilantan, ladana, landan, landana, leondeon, lndn, london, londoni, lun dui, lun dun, lwndwn, lxndxn, rondon, Łondra, Λονδίνο, Лондан, Лондон, Лондон ош, Лондонъ, Лёндан, Լոնդոն, לאנדאן, לונדון, لأندأن, لندن, لوندون, لەندەن, ܠܘܢܕܘܢ, लंडन, लंदन, लण्डन, लन्डन्, लन्दन, লন্ডন, ਲੰਡਨ, લંડન, ଲଣ୍ଡନ, இலண்டன், లండన్, ಲಂಡನ್, ലണ്ടൻ, ලන්ඩන්, ลอนดอน, ລອນດອນ, ལོན་ཊོན།, လန်ဒန်မြို့, ლონდონი, ለንደን, ᎫᎴ ᏗᏍᎪᏂᎯᏱ, ロンドン, 伦敦, 倫敦, 런던
Population
7,556,900
Currency
Pound (GBP)
Geographic Coordinates
51° 30' N Latitude / 0° 07' W Longitude
International Dialing Code
+44

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 30, 2025 at 1:00 am local time and clocks were set one hour forward to Sunday, March 30, 2025, 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 26, 2025 at 2:00 am local time and clocks are set one hour back to Sunday, October 26, 2025, 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 - Mitteleuropäische Zeit
  • WAT - West Africa Time
  • WST - Western Sahara Summer Time
  • BMT - Biel Mean Time

Gulf Standard Time

Offset: GST is 4 hours ahead Greenwich Mean Time (GMT) and is used in Asia

GST Time Zone Geo Map
GST timezone map

GST 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 east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Delta - Military abbreviation for GST
  • D - short form of 'Delta'
Time zones with the GMT +4 offset:
  • KUYT - Kuybyshev Time
  • MSD - Moscow Daylight Time
  • SAMT - Samara Time
  • AMT - Armenia Time
  • AZT - Azerbaijan Time
  • D - Delta Time Zone
  • GET - Georgia Standard Time
  • GST - Gulf Standard Time
  • MUT - Mauritius Time
  • RET - Reunion Time
  • SCT - Seychelles Time
EST to IST GMT to EST PST to EST EST to GMT PST to GMT