Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London. GMT is UTC+0 and is used as standard time in the UK, Ireland, and several West African nations during winter.
GMT stands for Greenwich Mean Time (UTC+0). You can check the current live GMT clock display on this page.
During summer, the UK switches from GMT (UTC+0) to British Summer Time (BST, UTC+1).
GMT is a time zone based on solar time at Greenwich. UTC is a high-precision time standard based on atomic clocks. In practice, GMT and UTC show the exact same time.