Time Now in GMT (Greenwich Mean Time) | Time.now

A time standard historically based on the mean solar time at the Royal Observatory in Greenwich, London. It is often used interchangeably with Coordinated Universal Time (UTC), especially in the UK during winter. Some African countries use GMT year-round.
Current time shown is based on the representative IANA zone: Etc/GMT
Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London, reckoned from midnight. It is the world’s time standard from which all other time zones are offset. Though often used interchangeably with Coordinated Universal Time (UTC), GMT is a time zone while UTC is a time standard. This article covers GMT’s definition, its standard offset, daylight saving practices, the regions that observe it, and practical guidance for business and travel.
GMT stands for Greenwich Mean Time. The name derives from the Royal Observatory in Greenwich, London, where the Prime Meridian (0° longitude) was established in 1884. GMT was historically the mean solar time at that location, and it became the basis for the world’s timekeeping system.
GMT has a standard UTC offset of UTC+00:00. During daylight saving time (DST), some regions that observe GMT switch to British Summer Time (BST), which is UTC+01:00. However, many countries in Africa and the Atlantic islands that use GMT do not observe DST, remaining at UTC+00:00 year-round. Key regions that do observe DST include the United Kingdom, Ireland, the Channel Islands, the Isle of Man, and the Faroe Islands (though the Faroe Islands are not in the IANA list provided). In these areas, clocks spring forward one hour on the last Sunday of March and fall back on the last Sunday of October.
GMT is observed year-round or as standard time in the following countries and territories:
GMT is bounded by time zones that are one hour ahead or behind. To the east, Central European Time (CET, UTC+01:00) is observed in countries like France and Germany. To the west, Azores Time (UTC-01:00) is used in the Azores (Portugal). In West Africa, GMT is adjacent to West Africa Time (WAT, UTC+01:00) used in Nigeria and Cameroon. Iceland uses GMT year-round, while the rest of Greenland uses UTC-03:00 or UTC-04:00. The United Kingdom and Ireland shift to BST (UTC+01:00) in summer, making them one hour ahead of Iceland and West African countries that stay on GMT.
When scheduling calls or meetings across GMT-using regions, note the following:
Always confirm whether the other party observes DST. Use a reliable world clock tool to check current local times.
GMT and UTC are often used interchangeably, but technically GMT is a time zone (based on solar time at Greenwich) while UTC is a time standard (based on atomic clocks). In practice, for civil timekeeping, GMT and UTC share the same offset (UTC+00:00) and are equivalent when no DST is in effect. However, during summer, the UK switches to BST (UTC+01:00), so GMT is not observed then.
Many West African countries use GMT year-round without daylight saving: Côte d'Ivoire, Ghana, Burkina Faso, Gambia, Guinea, Guinea-Bissau, Liberia, Mali, Mauritania, Saint Helena, Sao Tome and Principe, Senegal, Sierra Leone, and Togo. Iceland also uses GMT year-round. In Greenland, only the Danmarkshavn station uses GMT year-round.
No. The United Kingdom observes GMT only during standard time (winter), from the last Sunday in October to the last Sunday in March. During the rest of the year, it uses British Summer Time (BST), which is UTC+01:00.
Eastern Standard Time (EST) is UTC-05:00, so GMT is 5 hours ahead of EST. When Eastern Daylight Time (EDT, UTC-04:00) is in effect, GMT is 4 hours ahead. For example, noon GMT is 7:00 AM EST or 8:00 AM EDT.
It is named after the Royal Observatory in Greenwich, London, where the Prime Meridian (0° longitude) was established in 1884. The 'mean' refers to the average solar time at that longitude, accounting for the Earth’s elliptical orbit and axial tilt.
Yes, the IANA zone 'America/Danmarkshavn' is used at the Danmarkshavn weather station in northeastern Greenland, which observes GMT year-round. However, most of Greenland uses UTC-03:00 or UTC-04:00 with DST.
Use these time zone converters to instantly find the time in another location when it's a specific time in GMT. Simply click one of the converter links to see a live conversion.
Trying to find the best time to schedule something in GMT? Use these reverse converters to see what the time will be here based on the time in another location.
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