Every year the clocks move twice – moving us between Greenwich Mean Time (GMT) and British Summer Time (BST). Despite the annual change, it always manages to catch us off guard, because it doesn't happen on the same date annually.
Many also get confused about which way the clocks are changing, forwards or back, at which time of year. One easy way to remember this is "spring forward, fall back," meaning we move the clocks forward in the spring, and backwards in the autumn/fall.
As we move towards the summer, we move the clocks forward so there'll be more daylight in the evenings, which means less in the morning.