British Summer Time (BST) is the practice of moving the clocks forward by one hour during the warmer months in the United Kingdom. This change typically occurs on the last Sunday in March, when clocks are set forward at 1:00 AM to 2:00 AM. The aim is to make better use of daylight in the evenings. BST ends on the last Sunday in October, when clocks are set back one hour, returning to Greenwich Mean Time (GMT). This system helps to reduce energy consumption and allows people to enjoy more daylight during the longer days of summer.