BST
British Summer Time
GMT +1
ACST/ACDT
Australian Central Standard Time
GMT +9:30
ACDT automatically adjusted to ACST time zone, that is in use
PDT
Pacific Daylight Time
GMT -7
EDT/EST
Eastern Daylight Time
GMT -4
EST automatically adjusted to EDT time zone, that is in use
EEST
Eastern European Summer Time
GMT +3
CEST/CET
Central European Summer Time
GMT +2
CET automatically adjusted to CEST time zone, that is in use

Time Difference

British Summer Time is 8 hours and 30 minutes behind Australian Central Standard Time and 8 hours ahead of Pacific Daylight Time and 5 hours ahead of Eastern Daylight Time and 2 hours behind Eastern European Summer Time and 1 hours behind Central European Summer Time
8:30 am08:30 in BST is 5:00 pm17:00 in ACST and is 12:30 am00:30 in PDT and is 3:30 am03:30 in EDT and is 10:30 am10:30 in EEST and is 9:30 am09:30 in CEST

BST to ACDT call time
Best time for a conference call or a meeting is between 8am-10am in BST which corresponds to 5:30pm-7:30pm in ACDT
BST to PDT call time
Best time for a conference call or a meeting is between 4pm-6pm in BST which corresponds to 8am-10am in PDT
BST to EST call time
Best time for a conference call or a meeting is between 2pm-6pm in BST which corresponds to 8am-12pm in EST
BST to EEST call time
Best time for a conference call or a meeting is between 8am-4pm in BST which corresponds to 10am-6pm in EEST
BST to CET call time
Best time for a conference call or a meeting is between 8am-6pm in BST which corresponds to 8am-6pm in CET

8:30 am08:30 British Summer Time (BST). Offset UTC +1:00 hour
5:00 pm17:00 Australian Central Standard Time (ACST). Offset UTC +9:30 hours
12:30 am00:30 Pacific Daylight Time (PDT). Offset UTC -7:00 hours
3:30 am03:30 Eastern Daylight Time (EDT). Offset UTC -4:00 hours
10:30 am10:30 Eastern European Summer Time (EEST). Offset UTC +3:00 hours
9:30 am09:30 Central European Summer Time (CEST). Offset UTC +2:00 hours

8:30 am08:30 BST / 5:00 pm17:00 ACST / 12:30 am00:30 PDT / 3:30 am03:30 EDT / 10:30 am10:30 EEST / 9:30 am09:30 CEST

BST ACST PDT EDT EEST CEST
12am (midnight) 8:30 am 4pm 7pm 2am 1am
1am 9:30 am 5pm 8pm 3am 2am
2am 10:30 am 6pm 9pm 4am 3am
3am 11:30 am 7pm 10pm 5am 4am
4am 12:30 pm 8pm 11pm 6am 5am
5am 1:30 pm 9pm 12am (midnight) 7am 6am
6am 2:30 pm 10pm 1am 8am 7am
7am 3:30 pm 11pm 2am 9am 8am
8am 4:30 pm 12am (midnight) 3am 10am 9am
9am 5:30 pm 1am 4am 11am 10am
10am 6:30 pm 2am 5am 12pm (noon) 11am
11am 7:30 pm 3am 6am 1pm 12pm (noon)
12pm (noon) 8:30 pm 4am 7am 2pm 1pm
1pm 9:30 pm 5am 8am 3pm 2pm
2pm 10:30 pm 6am 9am 4pm 3pm
3pm 11:30 pm 7am 10am 5pm 4pm
4pm 12:30 am 8am 11am 6pm 5pm
5pm 1:30 am 9am 12pm (noon) 7pm 6pm
6pm 2:30 am 10am 1pm 8pm 7pm
7pm 3:30 am 11am 2pm 9pm 8pm
8pm 4:30 am 12pm (noon) 3pm 10pm 9pm
9pm 5:30 am 1pm 4pm 11pm 10pm
10pm 6:30 am 2pm 5pm 12am (midnight) 11pm
11pm 7:30 am 3pm 6pm 1am 12am (midnight)
0:00 8:30 16:00 19:00 2:00 1:00
1:00 9:30 17:00 20:00 3:00 2:00
2:00 10:30 18:00 21:00 4:00 3:00
3:00 11:30 19:00 22:00 5:00 4:00
4:00 12:30 20:00 23:00 6:00 5:00
5:00 13:30 21:00 0:00 7:00 6:00
6:00 14:30 22:00 1:00 8:00 7:00
7:00 15:30 23:00 2:00 9:00 8:00
8:00 16:30 0:00 3:00 10:00 9:00
9:00 17:30 1:00 4:00 11:00 10:00
10:00 18:30 2:00 5:00 12:00 11:00
11:00 19:30 3:00 6:00 13:00 12:00
12:00 20:30 4:00 7:00 14:00 13:00
13:00 21:30 5:00 8:00 15:00 14:00
14:00 22:30 6:00 9:00 16:00 15:00
15:00 23:30 7:00 10:00 17:00 16:00
16:00 0:30 8:00 11:00 18:00 17:00
17:00 1:30 9:00 12:00 19:00 18:00
18:00 2:30 10:00 13:00 20:00 19:00
19:00 3:30 11:00 14:00 21:00 20:00
20:00 4:30 12:00 15:00 22:00 21:00
21:00 5:30 13:00 16:00 23:00 22:00
22:00 6:30 14:00 17:00 0:00 23:00
23:00 7:30 15:00 18:00 1:00 0:00

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 - Mitteleuropäische Zeit
  • WAT - West Africa Time
  • WST - Western Sahara Summer Time
  • BMT - Biel Mean Time

Australian Central Daylight Time

Offset: ACDT is 10 hours and 30 minutes ahead Greenwich Mean Time (GMT) and is used in Australia

Countries: It is used in following countries: Australia

Principal Cities: The largest city in the ACDT timezone is Adelaide from Australia with population about 1.225 million people. Other major cities in the area are Adelaide Hills, Mount Gambier, Morphett Vale, Prospect

ACDT Time Zone Geo Map
ACDT timezone map

Daylight Saving: Australian Central Daylight Time (ACDT) is a daylight saving/summer time zone, however during winter some places adjust time for one hour back and observe Australian Central Standard Time (ACST).

Daylight saving time clock moves back for one hour from 3am to 2amEnd: Australian Central Daylight Time (ACDT) has ended on Sunday, April 2, 2023 at 3:00 am local time and clocks were set one hour back to Sunday, April 2, 2023, 2:00 am local standard time instead. Daylight saving ends annually the on first Sunday of April

Daylight saving time clock moves forward for one hour from 2am to 3amStart: Australian Central Daylight Time (ACDT) starts on Sunday, October 1, 2023 at 2:00 am local time and clocks are set one hour forward to Sunday, October 1, 2023, 3:00 am. Daylight saving starts annually the on first Sunday of October

ACDT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +1030 - basic
  • +10:30 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +1030 - sign character (+) followed by a four digit time providing hours (10) and minutes (30) of the offset. Indicates ten hour and thirty minutes time differences to the east of the zero meridian.
IANA/Olson: Reflects ACDT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Australia/Adelaide
  • Australia/Broken_Hill
  • Australia/South
  • Australia/Yancowinna
Time zones with the GMT +10:30 offset:
  • ACDT - Australian Central Daylight Time
  • LHST - Lord Howe Standard Time

Pacific Daylight Time

Offset: PDT is 7 hours behind Greenwich Mean Time (GMT) and is used in North America

Countries: It is used in following countries: Canada, Mexico, United States

Principal Cities: The largest city in the PDT timezone is Los Angeles from USA with population about 3.793 million people. Other major cities in the area are Vancouver, Tijuana, San Diego, San Jose

French: HAP - Heure Avancée du Pacifique

Spanish: PT - Zona Noroeste

PDT Time Zone Geo Map
PDT timezone map

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

Daylight saving time clock moves forward for one hour from 2am to 3amStart: Pacific Daylight Time (PDT) started on Sunday, March 12, 2023 at 2:00 am local time and clocks were set one hour forward to Sunday, March 12, 2023, 3:00 am. Daylight saving starts annually the on second Sunday of March

Daylight saving time clock moves back for one hour from 2am to 1amEnd: Pacific Daylight Time (PDT) ends on Sunday, November 5, 2023 at 2:00 am local time and clocks are set one hour back to Sunday, November 5, 2023, 1:00 am local standard time instead. Daylight saving ends annually the on first Sunday of November

PDT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -07 - basic short
  • -0700 - basic
  • -07:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0700 - sign character (-) followed by a four digit time providing hours (07) and minutes (00) of the offset. Indicates seven 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
  • Tango - Military abbreviation for PDT
  • T - short form of 'Tango'
IANA/Olson: Reflects PDT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Ensenada
  • America/Los_Angeles
  • America/Santa_Isabel
  • America/Tijuana
  • America/Vancouver
  • Canada/Pacific
  • Mexico/BajaNorte
  • PST8PDT
  • US/Pacific
Time zones with the GMT -7 offset:
  • MST - Mountain Standard Time
  • PDT - Pacific Daylight Time
  • YST - Yukon Standard Time
  • T - Tango Time Zone

Eastern Standard Time

Offset: EST is 5 hours behind Greenwich Mean Time (GMT) and is used in North America

Countries: It is used in following countries: Bahamas, Canada, Haiti, Jamaica, Cayman Islands, Mexico, Panama, Turks & Caicos Is, United States

Principal Cities: The largest city in the EST timezone is New York City from USA with population about 8.175 million people. Other major cities in the area are Toronto, Montreal, Brooklyn, Borough of Queens

French: HNE - Heure Normale de l'Est

Spanish: ET - Tiempo del Este, ET - Zona Sureste

EST Time Zone Geo Map
EST timezone map

Daylight Saving: This is a standard time zone, however during summer some places switch clocks for one hour forward when daylight saving comes into effect and observe Eastern Daylight Time (EDT).

Daylight saving time clock moves forward for one hour from 2am to 3amEnd: Eastern Standard Time (EST) has ended on Sunday, March 12, 2023 at 2:00 am local time and clocks were set one hour forward to Sunday, March 12, 2023, 3:00 am local daylight time instead. Standard time ends annually the on second Sunday of March.

Daylight saving time clock moves back for one hour from 2am to 1amStart: Eastern Standard Time (EST) starts on Sunday, November 5, 2023 at 2:00 am local time and clocks are set one hour back to Sunday, November 5, 2023, 1:00 am. Standard time starts annually the on first Sunday of November.

EST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -05 - basic short
  • -0500 - basic
  • -05:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0500 - sign character (-) followed by a four digit time providing hours (05) and minutes (00) of the offset. Indicates five 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
  • Romeo - Military abbreviation for EST
  • R - short form of 'Romeo'
IANA/Olson: Reflects EST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Atikokan
  • America/Cancun
  • America/Cayman
  • America/Coral_Harbour
  • America/Detroit
  • America/Fort_Wayne
  • America/Grand_Turk
  • America/Indiana/Indianapolis
  • America/Indiana/Marengo
  • America/Indiana/Petersburg
  • America/Indiana/Vevay
  • America/Indiana/Vincennes
  • America/Indiana/Winamac
  • America/Indianapolis
  • America/Iqaluit
  • America/Jamaica
  • America/Kentucky/Louisville
  • America/Kentucky/Monticello
  • America/Louisville
  • America/Montreal
  • America/Nassau
  • America/New_York
  • America/Nipigon
  • America/Panama
  • America/Pangnirtung
  • America/Port-au-Prince
  • America/Thunder_Bay
  • America/Toronto
  • Canada/Eastern
  • EST
  • EST5EDT
  • Jamaica
  • US/East-Indiana
  • US/Eastern
  • US/Michigan
Time zones with the GMT -5 offset:
  • CDT - Central Daylight Time
  • EST - Eastern Standard Time
  • ET - Eastern Time
  • COT - Colombia Time
  • CST - Cuba Standard Time
  • EASST - Easter Island Summer Time
  • ECT - Ecuador Time
  • PET - Peru Time
  • R - Romeo Time Zone

Eastern European Summer Time

Offset: EEST is 3 hours ahead Greenwich Mean Time (GMT) and is used in Europe

Countries: It is used in following countries: Åland Islands, Bulgaria, Cyprus, Estonia, Finland, Greece, Jordan, Lebanon, Lithuania, Latvia, Moldova, Palestine, Romania, Syria, Ukraine

Principal Cities: The largest city in the EEST timezone is Kiev from Ukraine with population about 2.798 million people. Other major cities in the area are Beirut, Bucharest, Aleppo, Damascus

German: OESZ - Osteuropäische Sommerzeit

EEST Time Zone Geo Map
EEST timezone map

Daylight Saving: Eastern European Summer Time (EEST) is a daylight saving/summer timezone, however during winter some places switch clocks for one hour back and observe Eastern European Time (EET).

Daylight saving time clock moves forward for one hour from 3am to 4amStart: Eastern European Summer Time (EEST) started on Sunday, March 26, 2023 at 3:00 am local time and clocks were set one hour forward to Sunday, March 26, 2023, 4:00 am. Daylight saving starts annually the on last Sunday of March

Daylight saving time clock moves back for one hour from 4am to 3amEnd: Eastern European Summer Time (EEST) ends on Sunday, October 29, 2023 at 4:00 am local time and clocks are set one hour back to Sunday, October 29, 2023, 3:00 am local standard time instead. Daylight saving ends annually the on last Sunday of October

EEST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +03 - basic short
  • +0300 - basic
  • +03:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0300 - sign character (+) followed by a four digit time providing hours (03) and minutes (00) of the offset. Indicates three 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
  • Charlie - Military abbreviation for EEST
  • C - short form of 'Charlie'
IANA/Olson: Reflects EEST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Asia/Amman
  • Asia/Beirut
  • Asia/Damascus
  • Asia/Famagusta
  • Asia/Gaza
  • Asia/Hebron
  • Asia/Nicosia
  • EET
  • Europe/Athens
  • Europe/Bucharest
  • Europe/Chisinau
  • Europe/Helsinki
  • Europe/Kiev
  • Europe/Mariehamn
  • Europe/Nicosia
  • Europe/Riga
  • Europe/Sofia
  • Europe/Tallinn
  • Europe/Tiraspol
  • Europe/Uzhgorod
  • Europe/Vilnius
  • Europe/Zaporozhye
EEST Abbreviation: Several time zones share EEST abbreviation and it could refer to these time zones
  • Eastern European Summer Time - UTC +3
  • Eastern European Standard Time - UTC +3
Time zones with the GMT +3 offset:
  • EEST - Eastern European Summer Time
  • MSK - Moscow Standard Time
  • AST - Arabia Standard Time
  • C - Charlie Time Zone
  • EAT - Eastern Africa Time
  • FET - Further Eastern European Time
  • IDT - Israel Daylight Time
  • TRT - Turkey Time

Central European Time

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

Countries: It is used in following countries: Andorra, Albania, Austria, Bosnia & Herzegovina, Belgium, Switzerland, Czech Republic, Germany, Denmark, Algeria, Spain, France, Gibraltar, Croatia, Hungary, Italy, Liechtenstein, Luxembourg, Monaco, Montenegro, North Macedonia, Malta, Netherlands, Norway, Poland, Serbia, Sweden, Slovenia, Svalbard & Jan Mayen, Slovakia, San Marino, Tunisia, Vatican City

Principal Cities: The largest city in the CET timezone is Berlin from Germany with population about 3.426 million people. Other major cities in the area are Madrid, Rome, Paris, Algiers

German: MEZ - Mitteleuropäische Zeit

CET Time Zone Geo Map
CET timezone map

Daylight Saving: This is a standard time zone, however during summer some places switch clocks for one hour forward when daylight saving comes into effect and observe Central European Summer Time (CEST).

Daylight saving time clock moves forward for one hour from 2am to 3amEnd: Central European Time (CET) has ended on Sunday, March 26, 2023 at 2:00 am local time and clocks were set one hour forward to Sunday, March 26, 2023, 3:00 am local daylight time instead. Standard time ends annually the on last Sunday of March.

Daylight saving time clock moves back for one hour from 3am to 2amStart: Central European Time (CET) starts on Sunday, October 29, 2023 at 3:00 am local time and clocks are set one hour back to Sunday, October 29, 2023, 2:00 am. Standard time starts annually the on last Sunday of October.

CET 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 CET
  • A - short form of 'Alpha'
IANA/Olson: Reflects CET time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Africa/Algiers
  • Africa/Ceuta
  • Africa/Tunis
  • Arctic/Longyearbyen
  • Atlantic/Jan_Mayen
  • CET
  • Europe/Amsterdam
  • Europe/Andorra
  • Europe/Belgrade
  • Europe/Berlin
  • Europe/Bratislava
  • Europe/Brussels
  • Europe/Budapest
  • Europe/Busingen
  • Europe/Copenhagen
  • Europe/Gibraltar
  • Europe/Ljubljana
  • Europe/Luxembourg
  • Europe/Madrid
  • Europe/Malta
  • Europe/Monaco
  • Europe/Oslo
  • Europe/Paris
  • Europe/Podgorica
  • Europe/Prague
  • Europe/Rome
  • Europe/San_Marino
  • Europe/Sarajevo
  • Europe/Skopje
  • Europe/Stockholm
  • Europe/Tirane
  • Europe/Vaduz
  • Europe/Vatican
  • Europe/Vienna
  • Europe/Warsaw
  • Europe/Zagreb
  • Europe/Zurich
  • Poland
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