British Summer Time Begins 2025. Here's everything you need to know about the 2025 clock change, including the date, time, and why it happens. 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.

It is a great way to commemorate the start of the warm summer season. Dst in the uk begins on the last sunday in.