British Summer Time operates from the last Sunday in March until the last Sunday in October. The UK moves its clocks forward from Greenwich Mean Time by one hour (GMT+1).
At 1.00 am GMT (2.00 am BST) on Sunday 31 October 2010 clocks go backwards one hour as civil time changes from British Summer Time (BST) to Coordinated Universal Time (almost identical to Greenwich Mean Time).
Summer time dates, 2009-2012
| Year | Date |
|---|---|
| 2009 | 29 March to 25 October |
| 2010 | 28 March to 31 October |
| 2011 | 27 March to 30 October |
| 2012 | 25 March to 28 October |
sources:
http://wwp.britishsummertime.co.uk/
