When Is British Summer Time 2025. View here when the clock must be set one hour forward or backward (summertime / daylight. In 2025 clocks go forward on 30 march at 1 am and go back on 26 october.

On sunday 27 october at 2am the clocks will go back by one hour, giving us an extra hour in bed and marking the end of british summer time (bst). Smartphones and other devices will change.