British Summer Time is between March and October of each year. In March clocks are set one hour forward of GMT at 1 am, and are re-set back to GMT in October at 2am. The following table lists British Summer Time for 1998-1999.

1998
29 March 1 hour forward
25 October 1 hour back

1999
28 March 1 hour forward
31 October 1 hour back