When Does British Summer Time Start 2025. When does british summer time start and end? This marks the beginning of british summer time (bst).
Get ready to spring forward and embrace sunlight like never before as british summer time begins commences on march 31! ‘spring forward, fall back.’ british summer time (bst) occurs on the last sunday of march and represents the phenomenon when the clocks go forward in spring by one hour and, in autumn, on the last sunday of october, reverts to.