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GMT
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The United Kingdom is on summer time: BST (UTC+1) until Sun, Oct 25.

Iceland and Ghana stay on GMT (UTC+0).

AZOST/AZOT
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AZOT is not used on this date.

This converter uses AZOST (UTC+0), as in Azores.

Quick answers

Selected conversion

12:00 pm12:00 GMT (UTC+0), Oct 12, 2026 = 12:00 pm12:00 AZOST (UTC+0), Oct 12, 2026

GMT and AZOST have the same local time.

GMT and AZOT examples

These examples always use GMT (UTC+0) and AZOT (UTC-1). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

GMT is 1 hour ahead of AZOT.

How the time difference changes

For most of the year, GMT and AZOST have the same time. From Oct 25, 2026 to Mar 28, 2027, GMT is 1 hour ahead of AZOT.

For most 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 AZOST. At other times of the year, working hours of 9:00 am to 5:00 pm in GMT correspond to 8:00 am to 4:00 pm in AZOT.For most of the year, working hours of 09:00 to 17:00 in GMT correspond to 09:00 to 17:00 in AZOST. At other times of the year, working hours of 09:00 to 17:00 in GMT correspond to 08:00 to 16:00 in AZOT.

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

Time Difference

Greenwich Mean Time and Azores Summer Time have the same local time.
12:00 pm12:00 in GMT is 12:00 pm12:00 in AZOST

GMT to AZOST call time
Best time for a conference call or a meeting is between 9am-5pm09:00-17:00 in GMT which corresponds to 9am-5pm09:00-17:00 in AZOST

12:00 pm12:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
12:00 pm12:00 Azores Summer Time (AZOST). Offset UTC 0:00 hours

12:00 pm12:00 GMT / 12:00 pm12:00 AZOST

Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.

Hourly time comparison
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Greenwich Mean Time

Offset: GMT is the same as Greenwich Mean Time (GMT).

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 the 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 the two are the same. In the military, GMT is known as Zulu time. Greenwich Mean Time was the same as Universal Time (UT), a standard astronomical concept used in many technical fields, until the introduction of UTC in 1972.

Map of the areas on Greenwich Mean Time (GMT)
GMT all year GMT part of the year

Today the lighter areas are on UTC+1 (British Summer Time, Irish Standard Time).

GMT 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 the zero UTC/GMT offset.
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
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 - Coordinated Universal Time
  • WT - Western Sahara Standard Time
  • Z - Zulu Time Zone

Azores Time

Offset: AZOT is 1 hour behind Greenwich Mean Time (GMT).

Countries using this time zone: Portugal

Principal Cities: The largest city in the AZOT time zone is Ponta Delgada in Portugal, with about 20,056 people. Other major cities in this time zone include Lagoa, Angra do Heroísmo, Rabo de Peixe, Horta.

Map of the areas on Azores Time (AZOT)
AZOT part of the year

Today the shaded areas are on UTC+0.

Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Azores Summer Time (AZOST).

123456789101112End: Azores Time (AZOT) ended on Sunday, March 29, 2026 at 12:00 am00:00 local time and clocks were set one hour forward to Sunday, March 29, 2026, 1:00 am01:00 local daylight time instead. Standard time ends annually on the last Sunday of March.

123456789101112Start: Azores Time (AZOT) starts on Sunday, October 25, 2026 at 1:00 am01:00 local time and clocks are set one hour back to Sunday, October 25, 2026, 12:00 am00:00. Standard time starts annually on the last Sunday of October.

See upcoming clock changes worldwide.

AZOT 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 west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • November - Military abbreviation for AZOT
  • N - short form of 'November'
Time zones with the GMT -1 offset:
  • EGT - East Greenland Time
  • WGST - Western Greenland Summer Time
  • AZOT - Azores Time
  • CVT - Cape Verde Time
  • N - November Time Zone