GMT Time Now

Greenwich Mean Time (GMT) zone (UTC+0):

Greenwich Mean Time

Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London, reckoned from midnight. At different times in the past, it has been calculated in different ways, including being calculated from noon; as a consequence, it cannot be used to specify a precise time unless a context is given.

Greenwich Mean Time or GMT is clock time at the Royal Observatory in Greenwich, London. It is not affected by Summer Time (Daylight Saving Time) clock changes.

When the sun is at its highest point exactly above the Prime Meridian, it is 1200 noon at Greenwich.

Check out the GMT timestamp to see how accurate your computer time is.

GMT is also a time zone, used by the United Kingdom of Great Britain and Northern Ireland (UK) when Daylight Saving Time is not in use, from October to March.

The Greenwich Meridian (Prime Meridian or 0° Degrees Longitude) marks the starting point of every Time Zone of the time zone map.