Here's the history of UK daylight saving time. NB. Note how stupid William was!!!! 20 minutes x 4!!! Good grief, it's bad enough remembering to advance the clock once every six months!!!!
The history of daylight saving time
The idea of summer time, or daylight saving time, was first suggested
in a whimsical article by Benjamin Franklin in 1784. In 1907 an
Englishman, William Willett campaigned to advance clocks by 80 minutes,
by 4 moves of 20 minutes at the beginning of the spring and summer
months and to return to Greenwich Mean Time (GMT) in a similar manner in
the autumn. In 1908 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 1916 that ordained that
for a certain period during the year legal time should be one hour in
advance of GMT. The Summer Time Acts of 1922 to 1925 extended the period
during which summer time was in force and so, from 1916 up to the
Second World War, clocks were put in advance of GMT by one hour from the
spring to the autumn.
During the Second World War, double summer time (2 hours in advance
of GMT) was introduced and was used for the period when, normally
ordinary summer time would have been in force. During the winter clocks
were kept one hour in advance of GMT. After the war, summer time was
invoked each year from 1948 to 1967. In 1968 clocks were advanced one
hour ahead of GMT on 18 February and remained so until British Standard
Time, during which clocks were kept in advance of GMT all year, came
into force between 27 October 1968 and 31 October 1971.
The Summer Time Act 1972 defined the period of British Summer Time to
start at 02.00 GMT on the morning of the day after the third Saturday
in March or, if that was Easter Day, the day after the second Saturday.
It was to end at 02.00 GMT on the day after the fourth Saturday in
October. The duration of British Summer Time can be varied by Order of
Council and in recent years has been changed so as to bring the date of
the start of Summer Time into line with that used in Europe. (In the
1980s the European Community started issuing directives which required
member states to legislate specific start and end dates for summer time
in order to improve coordination of transport and communications.)
The rule for 1981–1994 defined the start of summer time in the UK as
the last Sunday in March and the end as the day following the fourth
Saturday in October. The time of change was altered to 01.00 GMT.