How does Britain know what time it is?

Britain uses clocks and time signals to know what time it is.

Imagine you have a big clock in your house that ticks every second, like a friendly robot telling you when to go to bed or when to wake up. All over Britain, there are similar big clocks, but they all need to agree on the same time so everyone knows when lunch is or when it's bedtime.

There’s a very special clock in a place called Greenwich, near London. It keeps track of time super carefully, like a really good student who never forgets their homework. This clock sends out a signal every second, and other clocks listen to it so they can all tick together.

Some people use radio signals, kind of like listening to music on the radio, but instead of songs, it’s just a beep that says, “One second has passed!” That helps people know what time it is even if they're far away from Greenwich.