In 2015 BST runs from Sunday 29 March 01:00 GMT - Sunday 25 October 01:00 GMT (02:00 BST)
Fall (Autumn) BACK
This means that in the spring we turn our clock forward one hour to GMT+1. In the autumn (fall) we turn the clock back one hour to GMT. This gives an extra hour of light at the start of the day in winter and at the end of the day in summer.
In 2016: the
Sundays of 27 March and 30 October
In 2017: the Sundays of 26 March and 29 October
In 2018: the Sundays of 25 March and 28 October
In 2019: the Sundays of 30 March and 27 October
In 2020: the Sundays of 29 March and 31 October
Daylight Saving Time maximises the benefit of daylight at latitudes where summer days are long. Society does not need daylight at 3am but it is useful for work or play at 9.00pm. it allows a later dawn in summer when dawn comes early and lengthens the evening. This enables people to do more in the evenings without artificial light. The benefit tapers with latitude as day-length gets more extreme near the poles.
British Summer Time was introduced in the UK in 1916
British Summer Time was in force all year during the Second World War from February 1940 until October 1945 and again from February 1968 until October 1971. Double summer time (GMT +2) was in force in the summers from 1941-1947 except for 1946.
Since 2002 the UK has followed the harmonised European Union rule (see below).
All european states except Iceland (GMT), Belarus (GMT+3) and Russia use summer time
From 2002 the rule has been:
The Directive was implemented in English Law by 2002/262 The Summer Time Order 2002
Daylight Saving is used at latitudes where it can make a useful difference to daylight hours. Find more information about International Daylight Saving
BST has a fascinating history