In the wee small hours of Sunday morning, the clocks will go forward by an hour, marking the beginning – at last – of British Summer Time.
Mar 29, 2015 – Daylight Saving Time Starts
When local standard time is about to reach Sunday, March 29, 2015, 1:00:00 am clocks are turned forward 1 hour to Sunday, March 29, 2015, 2:00:00 am local daylight time instead
Sunrise and sunset will be about 1 hour later on Mar 29, 2015 than the day before. There will be more light in the evening.
Also called Spring Forward, summer time, and Daylight Savings Time.
AND THEN, 7 MONTHS LATER:
Oct 25
Back 1 hour
Oct 25, 2015 – Daylight Saving Time Ends
When local daylight time is about to reach
Sunday, October 25, 2015, 2:00:00 am clocks are turned backward 1 hour to
Sunday, October 25, 2015, 1:00:00 amlocal standard time instead
Sunrise and sunset will be about 1 hour earlier on Oct 25, 2015 than the day before. There will be more light in the morning.
Also called Fall Back and winter time.