So when do the clocks change this year? British Summer Time (BST) will start in the early hours of Easter Sunday, March 31. Clocks should be put forward 60 minutes at 1am as the UK moves out of Greenwich Mean Time (GMT). This means losing an hour in bed on Easter Sunday morning. Clocks go forward an hour from 1am to 2am on Sunday, March 31 as 2013 British Summer Time begins As a result of the change, there will be more daylight in the evenings and less in the mornings. BST traditionally starts on the last Sunday in March and ends on the final Sunday in October. So clocks will go back an hour on Sunday, October 27, 2013, when BST ends. And when do the clocks go forward and back in 2014? The daylight saving time dates for next year are March 30 and October 26.