When Does Summer Start 2025 Uk. The period when the clocks are 1 hour ahead is called british summer time (bst). The clock changes in the uk occur twice a year, marking the start and end of british summer time (bst).
The beginning of the fall is at 22 september 2025 om 18:20 bst. The clocks will once more go forward for the start of british summer time on sunday, march 30, 2025.