The clocks go back on the last Sunday in October. In the United Kingdom, this occurs at 2:00 a.m. local time, when clocks are turned back to 1 hour earlier, effectively ending British Summer Time and returning to Greenwich Mean Time. For 2025, that change happens on Sunday, 26 October, at 2:00 a.m. BST (British Summer Time) to 1:00 a.m. GMT (Greenwich Mean Time). If you’re in a different country, the date and time may vary, but the general rule in many European countries is the same: clocks go back one hour in late October.