Imagine you have a special toy clock that tells you when it's daytime or nighttime. This toy clock is different from your regular clock because it follows the moon instead of the sun. It helps you know when the moon is going to look different in the sky.
The lunar calendar is like that special toy clock. It helps people keep track of the moon's cycles which change the way the moon looks like in the sky.
The lunar cycle happens because the moon orbits around the Earth. The way that we see the moon will look different depending on where it is in its orbit.
A lunar calendar tracks the different phases of the moon. These are the different ways that the moon looks like in the sky. For example, sometimes the moon can look like a big circle. Other times it can look like a thin sliver. There are eight main phases that people use to track the moon's cycle.
People who use the lunar calendar often use it to know when important events or holidays happen. In many cultures, the lunar calendar is used to plan celebrations and festivals. So next time you look up at the moon, you'll know that there are people who are keeping track of its cycle and using it to plan special events!