GMT to PETST Converter
The United Kingdom is on summer time: BST (UTC+1) until Sun, Oct 25.
Iceland and Ghana stay on GMT (UTC+0).
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Add one or more places to compare local times, adjust the date, and share the result.
Quick answers
Selected conversion
12:00 pm12:00 GMT (UTC+0), Oct 13, 2026 = 12:00 am00:00 PETST (UTC+12), Oct 14, 2026
GMT is 12 hours behind PETST.
GMT and PETST examples
These examples always use GMT (UTC+0) and PETST (UTC+12). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
GMT is 12 hours behind PETST.
How the time difference changes
GMT is 12 hours behind PETST year-round.
Working hours of 9:00 am to 5:00 pm in GMT correspond to 9:00 pm to 5:00 am (next day) in PETST.Working hours of 09:00 to 17:00 in GMT correspond to 21:00 to 05:00 (next day) in PETST.
Compare GMT time with PETST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Greenwich Mean Time is 12 hours behind Kamchatka Summer Time.
12:00 pm12:00 in GMT is 12:00 am00:00 in PETST
GMT to PETST call time
Best time for a conference call or a meeting is between 7am-8am07:00-08:00 in GMT which corresponds to 7pm-8pm19:00-20:00 in PETST. Their 9am–5pm09:00–17:00 working hours do not overlap; this is a suggested compromise.
12:00 pm12:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
12:00 am00:00 Kamchatka Summer Time (PETST). Offset UTC +12:00 hours
12:00 pm12:00 GMT / 12:00 am00:00 PETST
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.
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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.
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 - Coordinated Universal Time
- WT - Western Sahara Standard Time
- Z - Zulu Time Zone
Kamchatka Summer Time
Offset: PETST is 12 hours ahead of Greenwich Mean Time (GMT).
Countries using this time zone: Russia
Principal Cities: The largest city in the PETST time zone is Petropavlovsk-Kamchatsky in Russia, with about 181,216 people. Other major cities in this time zone include Yelizovo, Vilyuchinsk, Klyuchi, Mil’kovo.
Daylight Saving: Clocks in Kamchatka Summer Time (PETST) do not change for daylight saving time, so PETST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.
PETST representations, usage and related time zones
- +12 - basic short
- +1200 - basic
- +12:00 - extended
- +1200 - sign character (+) followed by a four digit time providing hours (12) and minutes (00) of the offset. Indicates an offset of twelve hours to the east of the zero meridian.
- Mike - Military abbreviation for PETST
- M - short form of 'Mike'
- ANAST - Anadyr Summer Time
- ANAT - Anadyr Time
- FJT - Fiji Time
- GILT - Gilbert Island Time
- M - Mike Time Zone
- MAGST - Magadan Summer Time
- MHT - Marshall Islands Time
- NRT - Nauru Time
- NZST - New Zealand Standard Time
- PETST - Kamchatka Summer Time
- TVT - Tuvalu Time
- WFT - Wallis and Futuna Time
