Current GMT Time
GMT, Greenwich Mean Time, is the time at the Royal Observatory in Greenwich, London, and the name of the UTC+00:00 time zone. The clock shows the exact GMT time right now, to the second.
Current GMT time
Your local time: --:--:--
What is GMT?
Greenwich Mean Time is the mean solar time at the Prime Meridian, the 0° line of longitude that runs through Greenwich. It was the world's reference clock from 1884 until atomic time took over, and it is still the legal time in the United Kingdom in winter and the everyday time of a band of West African countries and Iceland.
GMT vs UTC
GMT and UTC show the same time, UTC+00:00, so for scheduling a call or a flight you can treat them as identical. The difference is in what they are: GMT is a time zone that countries adopt, while UTC is the atomic-clock standard every zone, including GMT, is defined from.
GMT vs BST: is London on GMT right now?
No. London is on BST at the moment, one hour ahead of GMT, because British Summer Time (UTC+01:00) is in force. The United Kingdom moves to BST on the last Sunday of March and back to GMT on the last Sunday of October. GMT itself never changes; it is the country that switches zone.
Countries that use GMT
Some stay on GMT all year; others use it only in winter and move their clocks in summer.
| Country | Capital | Uses GMT |
|---|---|---|
| 🇮🇸 Iceland | Reykjavík | All year |
| 🇬🇭 Ghana | Accra | All year |
| 🇸🇳 Senegal | Dakar | All year |
| 🇨🇮 Côte d'Ivoire | Abidjan | All year |
| 🇲🇱 Mali | Bamako | All year |
| 🇧🇫 Burkina Faso | Ouagadougou | All year |
| 🇬🇳 Guinea | Conakry | All year |
| 🇸🇱 Sierra Leone | Freetown | All year |
| 🇱🇷 Liberia | Monrovia | All year |
| 🇬🇲 Gambia | Banjul | All year |
| 🇹🇬 Togo | Lomé | All year |
| 🇲🇷 Mauritania | Nouakchott | All year |
| 🇬🇧 United Kingdom | London | Winter only |
| 🇮🇪 Ireland | Dublin | Winter only |
| 🇵🇹 Portugal | Lisbon | Winter only |
Time zones at UTC+00:00 right now
20 IANA zones share GMT's offset at this moment, including any that are only on it for part of the year.
- Africa/Abidjan · GMT
- Africa/Accra · GMT
- Africa/Bamako · GMT
- Africa/Banjul · GMT
- Africa/Bissau · GMT
- Africa/Casablanca · +00
- Africa/Conakry · GMT
- Africa/Dakar · GMT
- Africa/El Aaiun · +00
- Africa/Freetown · GMT
- Africa/Lome · GMT
- Africa/Monrovia · GMT
- Africa/Nouakchott · GMT
- Africa/Ouagadougou · GMT
- Africa/Sao Tome · GMT
- America/Danmarkshavn · GMT
- Atlantic/Azores · +00
- Atlantic/Reykjavik · GMT
- Atlantic/St Helena · GMT
- UTC · UTC
GMT time: frequently asked questions
What is GMT?
GMT, Greenwich Mean Time, is the mean solar time at the Royal Observatory in Greenwich, London. It is the time zone at UTC+00:00 and was the world's time reference before UTC replaced it for scientific use.
What is the difference between GMT and UTC?
For everyday purposes there is none: both are at UTC+00:00. GMT is a time zone used by countries and observers, while UTC is the atomic-clock standard that all time zones are defined from.
Is London on GMT all year?
No. London uses GMT in winter and British Summer Time (BST, UTC+01:00) from the last Sunday of March to the last Sunday of October.
Which countries use GMT all year?
Iceland, Ghana, Senegal, Côte d'Ivoire, Mali, Burkina Faso, Guinea, Sierra Leone, Liberia, The Gambia, Togo and Mauritania stay on GMT all year and do not change their clocks.
Does GMT change for daylight saving?
No. GMT itself never changes. Countries that observe daylight saving, such as the United Kingdom, Ireland and Portugal, move to a different zone in summer and return to GMT in winter.