UTC
Universal Time Coordinated
GMT +0
AEDT (Australian Eastern Daylight Time)
GMT +11
GMT (Greenwich Mean Time)
GMT +0
EDT (Eastern Daylight Time)
GMT -4
IST (India Standard Time)
GMT +5:30
CET (Central European Time)
GMT +1
PDT (Pacific Daylight Time)
GMT -7
NZDT (New Zealand Daylight Time)
GMT +13

Time Difference

Universal Time Coordinated is 11 hours behind of AEDT (Australian Eastern Daylight Time) and 0 hours ahead of GMT (Greenwich Mean Time) and 4 hours ahead of EDT (Eastern Daylight Time) and 5 hours and 30 minutes behind of IST (India Standard Time) and 8 hours behind of and 1 hours behind of CET (Central European Time) and 7 hours ahead of PDT (Pacific Daylight Time) and 13 hours behind of NZDT (New Zealand Daylight Time)
So 12:00 am00:00 in UTC is 11:00 am11:00 in Sydney, Australia and is 12:00 am00:00 in London, United Kingdom and is 8:00 pm20:00 in New York City, NY, USA and is 5:30 am05:30 in Mumbai, India and is 8:00 am08:00 in Singapore, Singapore and is 1:00 am01:00 in Munich, Germany and is 5:00 pm17:00 in San Francisco, CA, USA and is 1:00 pm13:00 in Auckland, New Zealand

12:00 am00:00 Universal Time Coordinated (UTC). Offset UTC 0:00 hours
11:00 am11:00 AEDT (Australian Eastern Daylight Time) (Sydney, Australia). Offset UTC +11:00 hours
12:00 am00:00 GMT (Greenwich Mean Time) (London, United Kingdom). Offset UTC 0:00 hours
8:00 pm20:00 EDT (Eastern Daylight Time) (New York City, NY, USA). Offset UTC -4:00 hours
5:30 am05:30 IST (India Standard Time) (Mumbai, India). Offset UTC +5:30 hours
8:00 am08:00 (Singapore, Singapore). Offset UTC +8:00 hours
1:00 am01:00 CET (Central European Time) (Munich, Germany). Offset UTC +1:00 hour
5:00 pm17:00 PDT (Pacific Daylight Time) (San Francisco, CA, USA). Offset UTC -7:00 hours
1:00 pm13:00 NZDT (New Zealand Daylight Time) (Auckland, New Zealand). Offset UTC +13:00 hours

12:00 am00:00 UTC / 11:00 am11:00 Sydney, Australia / 12:00 am00:00 London, United Kingdom / 8:00 pm20:00 New York City, NY, USA / 5:30 am05:30 Mumbai, India / 8:00 am08:00 Singapore, Singapore / 1:00 am01:00 Munich, Germany / 5:00 pm17:00 San Francisco, CA, USA / 1:00 pm13:00 Auckland, New Zealand

UTC Sydney, Australia London, United Kingdom New York City, NY, USA Mumbai, India Singapore, Singapore Munich, Germany San Francisco, CA, USA Auckland, New Zealand
12am (midnight) 11am 12am (midnight) 8pm 5:30 am 8am 1am 5pm 1pm
1am 12pm (noon) 1am 9pm 6:30 am 9am 2am 6pm 2pm
2am 1pm 2am 10pm 7:30 am 10am 3am 7pm 3pm
3am 2pm 3am 11pm 8:30 am 11am 4am 8pm 4pm
4am 3pm 4am 12am (midnight) 9:30 am 12pm (noon) 5am 9pm 5pm
5am 4pm 5am 1am 10:30 am 1pm 6am 10pm 6pm
6am 5pm 6am 2am 11:30 am 2pm 7am 11pm 7pm
7am 6pm 7am 3am 12:30 pm 3pm 8am 12am (midnight) 8pm
8am 7pm 8am 4am 1:30 pm 4pm 9am 1am 9pm
9am 8pm 9am 5am 2:30 pm 5pm 10am 2am 10pm
10am 9pm 10am 6am 3:30 pm 6pm 11am 3am 11pm
11am 10pm 11am 7am 4:30 pm 7pm 12pm (noon) 4am 12am (midnight)
12pm (noon) 11pm 12pm (noon) 8am 5:30 pm 8pm 1pm 5am 1am
1pm 12am (midnight) 1pm 9am 6:30 pm 9pm 2pm 6am 2am
2pm 1am 2pm 10am 7:30 pm 10pm 3pm 7am 3am
3pm 2am 3pm 11am 8:30 pm 11pm 4pm 8am 4am
4pm 3am 4pm 12pm (noon) 9:30 pm 12am (midnight) 5pm 9am 5am
5pm 4am 5pm 1pm 10:30 pm 1am 6pm 10am 6am
6pm 5am 6pm 2pm 11:30 pm 2am 7pm 11am 7am
7pm 6am 7pm 3pm 12:30 am 3am 8pm 12pm (noon) 8am
8pm 7am 8pm 4pm 1:30 am 4am 9pm 1pm 9am
9pm 8am 9pm 5pm 2:30 am 5am 10pm 2pm 10am
10pm 9am 10pm 6pm 3:30 am 6am 11pm 3pm 11am
11pm 10am 11pm 7pm 4:30 am 7am 12am (midnight) 4pm 12pm (noon)
0:00 11:00 0:00 20:00 5:30 8:00 1:00 17:00 13:00
1:00 12:00 1:00 21:00 6:30 9:00 2:00 18:00 14:00
2:00 13:00 2:00 22:00 7:30 10:00 3:00 19:00 15:00
3:00 14:00 3:00 23:00 8:30 11:00 4:00 20:00 16:00
4:00 15:00 4:00 0:00 9:30 12:00 5:00 21:00 17:00
5:00 16:00 5:00 1:00 10:30 13:00 6:00 22:00 18:00
6:00 17:00 6:00 2:00 11:30 14:00 7:00 23:00 19:00
7:00 18:00 7:00 3:00 12:30 15:00 8:00 0:00 20:00
8:00 19:00 8:00 4:00 13:30 16:00 9:00 1:00 21:00
9:00 20:00 9:00 5:00 14:30 17:00 10:00 2:00 22:00
10:00 21:00 10:00 6:00 15:30 18:00 11:00 3:00 23:00
11:00 22:00 11:00 7:00 16:30 19:00 12:00 4:00 0:00
12:00 23:00 12:00 8:00 17:30 20:00 13:00 5:00 1:00
13:00 0:00 13:00 9:00 18:30 21:00 14:00 6:00 2:00
14:00 1:00 14:00 10:00 19:30 22:00 15:00 7:00 3:00
15:00 2:00 15:00 11:00 20:30 23:00 16:00 8:00 4:00
16:00 3:00 16:00 12:00 21:30 0:00 17:00 9:00 5:00
17:00 4:00 17:00 13:00 22:30 1:00 18:00 10:00 6:00
18:00 5:00 18:00 14:00 23:30 2:00 19:00 11:00 7:00
19:00 6:00 19:00 15:00 0:30 3:00 20:00 12:00 8:00
20:00 7:00 20:00 16:00 1:30 4:00 21:00 13:00 9:00
21:00 8:00 21:00 17:00 2:30 5:00 22:00 14:00 10:00
22:00 9:00 22:00 18:00 3:30 6:00 23:00 15:00 11:00
23:00 10:00 23:00 19:00 4:30 7:00 0:00 16:00 12:00

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
  • +00 -


AEDT (Australian Eastern Daylight Time)

Offset: AEDT is 11 hours 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 AEDT timezone is Sydney from Australia with population about 4.627 million people. Other major cities in the area are Melbourne, Canberra, Newcastle, Wollongong

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

Start: Australian Eastern Daylight Time (AEDT) started and clocks were set one hour forward on Sunday, 04 October 2020, at 2:00 (2:00 am) local time.

End: Australian Eastern Daylight Time (AEDT) ends and clocks are set one hour back on Sunday, 04 April 2021, at 3:00 (3:00 am) local time.

Sydney, Australia Time Zone Geo Map
Sydney, Australia timezone map
Sydney, Australia 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 eleven 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
  • Lima - Military abbreviation for AEDT
  • L - short form of 'Lima'

IANA/Olson: Reflects AEDT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Australia/ACT
  • Australia/Canberra
  • Australia/Currie
  • Australia/Hobart
  • Australia/Melbourne
  • Australia/NSW
  • Australia/Sydney
  • Australia/Tasmania
  • Australia/Victoria

Time zones with the GMT +11 offset:

  • AEDT - Australian Eastern Daylight Time
  • BST - Bougainville Standard Time
  • KOST - Kosrae Time
  • L - Lima Time Zone
  • LHDT - Lord Howe Daylight Time
  • NCT - New Caledonia Time
  • PETT - Kamchatka Time
  • PONT - Pohnpei Standard Time
  • SBT - Solomon IslandsTime
  • VLAST - Vladivostok Summer Time
  • VUT - Vanuatu Time
  • +11 -


GMT (Greenwich Mean Time)

Offset: GMT is 0 hours ahead Greenwich Mean Time (GMT) and is used in Europe

Countries: It is used in following countries: 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 timezone is London from United Kingdom with population about 7.557 million people. Other major cities in the area are Abidjan, Dakar, Grand Dakar, Accra

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.

London, United Kingdom Time Zone Geo Map
London, United Kingdom timezone map
London, United Kingdom 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 GMT
  • Z - short form of 'Zulu'

IANA/Olson: Reflects GMT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • 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

GMT Abbreviation: Several time zones share GMT abbreviation and it could refer to these time zones

  • Greenwich Mean Time - UTC +0
  • GMT+08:00 - UTC +8
  • GMT-03:00 - UTC -3
  • GMT+10:00 - UTC +10
  • GMT+03:00 - UTC +3
  • GMT - UTC +1
  • GMT+04:00 - UTC +4
  • GMT-01:00 - UTC -1

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
  • +00 -


EDT (Eastern Daylight Time)

Offset: EDT is 4 hours behind Greenwich Mean Time (GMT) and is used in North America

Countries: It is used in following countries: Bahamas, Canada, Haiti, Turks & Caicos Is, United States

Principal Cities: The largest city in the EDT 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

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

Start: Eastern Daylight Time (EDT) started and clocks were set one hour forward on Sunday, 14 March 2021, at 2:00 (2:00 am) local time.

End: Eastern Daylight Time (EDT) ends and clocks are set one hour back on Sunday, 07 November 2021, at 2:00 (2:00 am) local time.

French: HAE - Heure Avancée de l'Est

Spanish: EDT - Tiempo de verano del Este, ET - Zona Sureste

New York City, NY, USA Time Zone Geo Map
New York City, NY, USA timezone map
New York City, NY, USA 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 EDT
  • Q - short form of 'Quebec'

IANA/Olson: Reflects EDT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • 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/Kentucky/Louisville
  • America/Kentucky/Monticello
  • America/Louisville
  • America/Montreal
  • America/Nassau
  • America/New_York
  • America/Nipigon
  • America/Pangnirtung
  • America/Port-au-Prince
  • America/Thunder_Bay
  • America/Toronto
  • Canada/Eastern
  • EST5EDT
  • US/East-Indiana
  • US/Eastern
  • US/Michigan

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
  • PYT - Paraguay Time
  • Q - Quebec Time Zone
  • VET - Venezuelan Standard Time
  • -04 -


IST (India Standard Time)

Offset: IST is 5 hours and 30 minutes ahead Greenwich Mean Time (GMT) and is used in Asia

Countries: It is used in following countries: India

Principal Cities: The largest city in the IST timezone is Mumbai from India with population about 12.692 million people. Other major cities in the area are Delhi, Bangalore, Kolkata, Chennai

Daylight Saving: India Standard Time (IST) is not adjusted for daylight saving therefore IST remains the same through out the year. This means, unlike some time zones where the clock is set forward by one hour every summer and backward by one hour during winter to adjust for daylight saving, India Standard Time remains the same

Mumbai, India Time Zone Geo Map
Mumbai, India timezone map
Mumbai, India representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +0530 - basic
  • +05:30 - extended

Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0530 - sign character (+) followed by a four digit time providing hours (05) and minutes (30) of the offset. Indicates five hour and thirty minutes time differences to the east of the zero meridian.

IANA/Olson: Reflects IST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Asia/Calcutta
  • Asia/Kolkata

IST Abbreviation: Several time zones share IST abbreviation and it could refer to these time zones

  • India Standard Time - UTC +5:30
  • Irish Standard Time - UTC +1
  • Israel Standard Time - UTC +2


Singapore, Singapore

Offset: +08 is 8 hours ahead Greenwich Mean Time (GMT) and is used in Asia

Countries: It is used in following countries: Antarctica, Brunei, Mongolia, Malaysia, Russia, Singapore

Principal Cities: The largest city in the +08 timezone is Singapore from Singapore with population about 3.548 million people. Other major cities in the area are Kota Bharu, Kuala Lumpur, Klang, Ulaanbaatar

Daylight Saving: (+08) is not adjusted for daylight saving therefore +08 remains the same through out the year. This means, unlike some time zones where the clock is set forward by one hour every summer and backward by one hour during winter to adjust for daylight saving, remains the same

Singapore, Singapore representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +08 - basic short
  • +0800 - basic
  • +08:00 - extended

Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0800 - sign character (+) followed by a four digit time providing hours (08) and minutes (00) of the offset. Indicates eight 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
  • Hotel - Military abbreviation for +08
  • H - short form of 'Hotel'

IANA/Olson: Reflects +08 time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Antarctica/Casey
  • Asia/Brunei
  • Asia/Choibalsan
  • Asia/Irkutsk
  • Asia/Kuala_Lumpur
  • Asia/Kuching
  • Asia/Singapore
  • Asia/Ulaanbaatar
  • Asia/Ulan_Bator
  • Etc/GMT-8
  • Singapore

Time zones with the GMT +8 offset:

  • ACT - ASEAN Common Time
  • AWST - Australian Western Standard Time
  • BNT - Brunei Darussalam Time
  • CAST - Casey Time
  • CHOT - Choibalsan Time
  • CST - China Standard Time
  • H - Hotel Time Zone
  • HKT - Hong Kong Time
  • HOVST - Hovd Summer Time
  • IRKT - Irkutsk Time
  • KRAST - Krasnoyarsk Summer Time
  • MYT - Malaysia Time
  • PHT - Philippine Time
  • SGT - Singapore Time
  • ULAT - Ulaanbaatar Time
  • WITA - Central Indonesian Time
  • GMT - GMT+08:00
  • +08 -


CET (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

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

Start: CET started and clocks were set one hour back on Sunday, 25 October 2020, at 3:00 (3:00 am) local time.

End: CET ends and clocks are set one hour forward on Sunday, 28 March 2021, at 2:00 (2:00 am) local time.

German: MEZ - Mitteleuropäische Zeit

Munich, Germany Time Zone Geo Map
Munich, Germany timezone map
Munich, Germany 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
  • GMT - GMT
  • +01 -


PDT (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

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).

Start: Pacific Daylight Time (PDT) started and clocks were set one hour forward on Sunday, 14 March 2021, at 2:00 (2:00 am) local time.

End: Pacific Daylight Time (PDT) ends and clocks are set one hour back on Sunday, 07 November 2021, at 2:00 (2:00 am) local time.

French: HAP - Heure Avancée du Pacifique

Spanish: PT - Zona Noroeste

San Francisco, CA, USA Time Zone Geo Map
San Francisco, CA, USA timezone map
San Francisco, CA, USA 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
  • US/Pacific-New

Time zones with the GMT -7 offset:

  • MST - Mountain Standard Time
  • PDT - Pacific Daylight Time
  • T - Tango Time Zone


NZDT (New Zealand Daylight Time)

Offset: NZDT is 13 hours ahead Greenwich Mean Time (GMT) and is used in Pacific

Countries: It is used in following countries: Antarctica, New Zealand

Principal Cities: The largest city in the NZDT timezone is Auckland from New Zealand with population about 1.535 million people. Other major cities in the area are Wellington, Christchurch, Hamilton, Tauranga

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

Start: New Zealand Daylight Time (NZDT) started and clocks were set one hour forward on Sunday, 27 September 2020, at 2:00 (2:00 am) local time.

End: New Zealand Daylight Time (NZDT) ends and clocks are set one hour back on Sunday, 04 April 2021, at 3:00 (3:00 am) local time.

Auckland, New Zealand Time Zone Geo Map
Auckland, New Zealand timezone map
Auckland, New Zealand representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +13 - basic short
  • +1300 - basic
  • +13:00 - extended

Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +1300 - sign character (+) followed by a four digit time providing hours (13) and minutes (00) of the offset. Indicates thirteen hour and zero minutes time differences to the east of the zero meridian.

IANA/Olson: Reflects NZDT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Antarctica/McMurdo
  • Antarctica/South_Pole
  • NZ
  • Pacific/Auckland

Time zones with the GMT +13 offset:

  • FJST - Fiji Summer Time
  • NZDT - New Zealand Daylight Time
  • PHOT - Phoenix Island Time
  • TKT - Tokelau Time
  • TOT - Tonga Time
  • WST - West Samoa Time
  • WSST - West Samoa Standard Time