When Is Bst 2025 Starting. They spring forward an hour in march and go back an hour in. This change marks the start of lighter evenings, which many people look forward to after the darker winter.

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 greenwich mean time. British summer time, also known as bst, starts on the last sunday of march and ends on the last sunday of october, which means that it lasts for most of the.