Summer time will start on Sunday 27 March at 1.00 am GMT throughout European Union Member States. The clocks go forward an hour. This means that at 1.00 am (GMT) the UK will move to 2.00 am British Summer Time (BST).
The 9th EC Directive on summer time harmonised, for an indefinite period, the dates on which summer time begins and ends across member states as the last Sundays in March and October respectively. Under the Directive, summer time begins and ends at 1.00 am GMT in each Member State. Amendments to the Summer Time Act to implement the Directive came into force on 11 March 2002.