The history of daylight saving time

In 1907 an Englishman, William Willett, campaigned to advance clocks by 80 minutes. He proposed four moves of 20 minutes at the beginning of the spring and summer months, and to return to Greenwich Mean Time in a similar manner in the autumn. The following year, the House of Commons rejected a Bill to advance the clocks by one hour during the spring and summer months.
Summer time was first defined in an Act of Parliament in 1916. The clocks were moved one hour ahead of GMT from the spring to the autumn.
During the Second World War, double summer time (two hours in advance of GMT) was introduced, lasting until July 1945.

Since the 1980s, all parts of western and central Europe have co-ordinated the date and the time of their clock changes.