What time zone is England in?
England uses Greenwich Mean Time, or GMT, in winter and British Summer Time, or BST, in summer. BST is one hour ahead of GMT. The rest of the United Kingdom follows the same time.
Greenwich Mean Time is based on the Prime Meridian, which passes through the Royal Observatory in Greenwich, London. In 1884, an international conference chose Greenwich as the starting point for the world's time zones.
GMT is equal to Coordinated Universal Time, the international time standard, for most practical purposes.
Changing the clocks
Clocks go forward one hour on the last Sunday in March, starting British Summer Time. They go back one hour on the last Sunday in October, returning to GMT.
British Summer Time was first introduced in 1916, during World War I, to save energy and make better use of daylight.
During summer, England is one hour behind most of Western Europe, such as France and Germany. The United Kingdom has debated whether to stop changing the clocks, but no change has been made. A useful reminder is spring forward, fall back.