The UK first tried this during World War One, mostly to save coal for the war effort. It was a bit like asking the whole country to reset their alarms to help the war. It worked pretty well, so they kept it, and now it's just part of our rhythm.
But did you know there was a period between 1968 and 1971 when the UK experimented with keeping BST all year round? Imagine never changing your clocks again! It was called British Standard Time, but it caused chaos—children walking to school in pitch-black winter mornings—so they quickly ditched it. Funny how a simple hour can cause such a fuss, right?