WST to GMT Converter
The United Kingdom is on summer time: BST (UTC+1) until Sun, Oct 25.
Iceland and Ghana stay on GMT (UTC+0).
Start by searching for a time zone, city, or town.
Add one or more places to compare local times, adjust the date, and share the result.
Quick answers
Selected conversion
12:00 pm12:00 WT (UTC+0), Oct 13, 2026 = 12:00 pm12:00 GMT (UTC+0), Oct 13, 2026
WT and GMT have the same local time.
WST and GMT examples
These examples always use WST (UTC+1) and GMT (UTC+0). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
WST is 1 hour ahead of GMT.
How the time difference changes
In 2026, WST is 1 hour ahead of GMT for most of the year. From Feb 15 to Mar 22, 2026, and from Sep 20, 2026, WT and GMT have the same time.
In 2026, working hours of 9:00 am to 5:00 pm in WST correspond to 8:00 am to 4:00 pm in GMT for most of the year. At other times that year, working hours of 9:00 am to 5:00 pm in WT correspond to 9:00 am to 5:00 pm in GMT.In 2026, working hours of 09:00 to 17:00 in WST correspond to 08:00 to 16:00 in GMT for most of the year. At other times that year, working hours of 09:00 to 17:00 in WT correspond to 09:00 to 17:00 in GMT.
Compare WST time with GMT time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Western Sahara Standard Time and Greenwich Mean Time have the same local time.
12:00 pm12:00 in WT is 12:00 pm12:00 in GMT
WT to GMT call time
Best time for a conference call or a meeting is between 9am-5pm09:00-17:00 in WT which corresponds to 9am-5pm09:00-17:00 in GMT
12:00 pm12:00 Western Sahara Standard Time (WT). Offset UTC 0:00 hours
12:00 pm12:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
12:00 pm12:00 WT / 12:00 pm12:00 GMT
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.
| WT | GMT |
|---|---|
| 12:00am | |
| 1:00am | |
| 2:00am | |
| 3:00am | |
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| 5:00am | |
| 6:00am | |
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| 8:00am | |
| 9:00am | |
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| 11:00am | |
| 12:00pm | |
| 1:00pm | |
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| 3:00pm | |
| 4:00pm | |
| 5:00pm | |
| 6:00pm | |
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| 9:00pm | |
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| 11:00pm | |
| 00:00 | |
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| 04:00 | |
| 05:00 | |
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| 08:00 | |
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| 11:00 | |
| 12:00 | |
| 13:00 | |
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| 17:00 | |
| 18:00 | |
| 19:00 | |
| 20:00 | |
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| 22:00 | |
| 23:00 |
Western Sahara Summer Time
Offset: WST is 1 hour ahead of Greenwich Mean Time (GMT).
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.
WST representations, usage and related time zones
- +01 - basic short
- +0100 - basic
- +01:00 - extended
- +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 east of the zero meridian.
- Alpha - Military abbreviation for WST
- A - short form of 'Alpha'
- Western Sahara Summer Time - UTC +1
- West Samoa Time - UTC +13
- 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
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.
Today the lighter areas are on UTC+1 (British Summer Time, Irish Standard Time).
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