Current Time in GMT+0 Time Zone
IANA Name: GMT+0
Standard Offset: UTC +00:00
Daylight Saving: No
Currently Observing DST: No ❌
GMT+0: The Prime Meridian Time Zone (UTC+00:00, No DST)
GMT+0 is the time zone centered on the Prime Meridian at 0° longitude. It uses Coordinated Universal Time (UTC+00:00) year-round, with no daylight saving adjustments. This zone covers parts of West Africa, West Europe (in winter), and several Atlantic islands. It is the reference for all other time zones.
Where GMT+0 Applies
The IANA time zone database lists multiple zones at UTC+00:00 that do not observe daylight saving time. These include Africa/Abidjan (Côte d'Ivoire), Africa/Accra (Ghana), Africa/Bamako (Mali), Africa/Banjul (Gambia), Africa/Bissau (Guinea-Bissau), Africa/Conakry (Guinea), Africa/Dakar (Senegal), Africa/Freetown (Sierra Leone), Africa/Lome (Togo), Africa/Monrovia (Liberia), Africa/Nouakchott (Mauritania), and Africa/Ouagadougou (Burkina Faso). Additionally, the zone Atlantic/Reykjavik (Iceland) and Atlantic/St_Helena (St Helena, Ascension and Tristan da Cunha) also use UTC+00:00 without DST. In Europe, countries like Portugal (mainland and Madeira), the United Kingdom, Ireland, and the Canary Islands (Spain) use UTC+00:00 during winter but switch to UTC+01:00 for summer; they are not part of this constant-offset group.
Offset and Abbreviation
The standard offset is UTC+00:00, commonly called Greenwich Mean Time (GMT). The abbreviation GMT is used year-round in zones that do not observe DST. In West African countries, the time is often referred to as Greenwich Mean Time (GMT) or Coordinated Universal Time (UTC). Liberia uses GMT, though historically it had its own offset. The offset is exactly zero hours from UTC, making it the baseline for global timekeeping.
No Daylight Saving Time
All zones listed here have permanently abolished daylight saving time or never observed it. The offset remains constant at UTC+00:00 throughout the year. This means no clock changes in spring or autumn. For example, in Abidjan (Côte d'Ivoire), sunrise and sunset times shift naturally with the seasons, but the clock never jumps forward or back. This simplicity is beneficial for scheduling and avoids the disruption of DST transitions.
Main Countries and Cities
Major cities in this zone include Abidjan (Côte d'Ivoire), Accra (Ghana), Bamako (Mali), Banjul (Gambia), Bissau (Guinea-Bissau), Conakry (Guinea), Dakar (Senegal), Freetown (Sierra Leone), Lome (Togo), Monrovia (Liberia), Nouakchott (Mauritania), and Ouagadougou (Burkina Faso). In the Atlantic, Reykjavik (Iceland) and Jamestown (St Helena) also use UTC+00:00 without DST. These cities span West Africa and the North Atlantic, covering a wide range of latitudes.
Business Hours and Scheduling
Because GMT+0 does not observe DST, its time offset is predictable year-round. For business with London (which switches to BST in summer), the difference alternates between 0 and +1 hour. For New York (Eastern Time, which observes DST), the difference is 5 hours behind during winter (EST) and 4 hours behind during summer (EDT). For Tokyo (JST, no DST), it is 9 hours ahead. The constant offset simplifies recurring meetings: you only need to account for the other zone's DST changes. Best overlap for calls with North America is typically late morning GMT+0 (e.g., 14:00 GMT+0 is 10:00 EDT, a good window). For Asia, early morning GMT+0 (e.g., 08:00 GMT+0 is 17:00 JST) works well.
Frequently Asked Questions
What is the difference between GMT and UTC?
GMT (Greenwich Mean Time) is a time zone based on the mean solar time at the Prime Meridian. UTC (Coordinated Universal Time) is a time standard used as the basis for civil time. For practical purposes, GMT and UTC are identical and are often used interchangeably. In the context of this zone, GMT is the common name for UTC+00:00.
Does any part of the United Kingdom use GMT+0 without DST?
No. The United Kingdom uses GMT (UTC+00:00) during winter but switches to British Summer Time (UTC+01:00) from late March to late October. The constant-offset zones listed here are primarily in West Africa and the Atlantic.
Why do some West African countries use GMT+0 while others use UTC+01:00?
Historical and political decisions determine time zone choices. Many West African countries near the Prime Meridian chose GMT+0 to align with their solar time. Others, like Nigeria and Cameroon, use UTC+01:00 for various reasons including colonial legacy and economic ties. There is no geographical mandate; it is a matter of national preference.
If I am in Accra (GMT+0), what time is it in New York during summer?
New York observes Eastern Daylight Time (EDT, UTC-04:00) from March to November. Accra is UTC+00:00, so the difference is 4 hours. When it is 12:00 noon in Accra, it is 8:00 AM in New York.
Does Iceland observe daylight saving time?
No. Iceland uses UTC+00:00 year-round (Atlantic/Reykjavik). It does not switch to summer time, making it one of the few European countries with constant offset.
What is the best time to schedule a call between GMT+0 and Tokyo?
Tokyo uses Japan Standard Time (JST, UTC+09:00) without DST. The difference is 9 hours. A good window is 08:00-10:00 GMT+0, which corresponds to 17:00-19:00 JST, allowing overlap at the end of the Japanese business day.