European Summer Time refers to the period during which, in the countries of the European Union (and other countries which have adopted the same convention), clocks are advanced by one hour in relation to the official time observed during the rest of the year.
This period extends from 01.00 UTC on the last Sunday in March until 01.00 UTC on the last Sunday in October each year.
European Summer Time ends (clocks go back) at 01.00 UTC on
31 October 2004
30 October 2005
29 October 2006
28 October 2007
European Summer Time begins (clocks go forward) at 01.00 UTC on
27 March 2005
26 March 2006
25 March 2007
30 March 2008
In the United Kingdom this period is known as British Summer Time (BST), while local time during the rest of the year is normally referred to as Greenwich Mean Time (GMT).
All European countries - with the exception of Iceland, which observes UTC all year round -- change their clocks on the same dates.