ELI5: Explain Like I'm 5

Timekeeping

Do you know what time is? It's when we can tell how many minutes, hours, or even days have gone by. Timekeeping is all about keeping track of time in the right way.

There are many ways to keep track of time. One way is by using a clock. You may have a clock in your house, and it helps you know when it's time for school, dinner, or bedtime.

But did you know that there are other ways to keep track of time too? A long time ago, people used to look at the sun and the stars to know what time it was. They would see when it was light out or when it was dark out and they could tell what part of the day it was.

Today, we have all kinds of fancy clocks and watches that tell us what time it is. But these clocks need to be very accurate, which means they have to be set up just right.

Some clocks are set up by people, and other clocks are set up by special machines that know exactly how long a minute is. These are called atomic clocks, and they're super accurate. Scientists use them to do experiments and make sure that all the clocks in the world are telling the same time.

Timekeeping is important because it helps us plan our day and know when to do different things. It's also important for things like travel and keeping our entire world working together.