Here's why:
* The moon is always there. It's orbiting the Earth constantly, regardless of the time of day.
* It reflects sunlight. The moon doesn't produce its own light; we see it because sunlight reflects off its surface.
* Visibility depends on its position. The moon's visibility during the day depends on its position relative to the sun and Earth. Sometimes, the moon's position is such that it's visible in the sky during the daytime, even though the sun is also out.
However, seeing the moon during the day can be tricky:
* Sunlight makes it hard to spot. The bright sunlight can make it difficult to see the moon, especially if it's near the sun in the sky.
* Moon phase matters. You're more likely to see the moon during the day when it's a crescent or a gibbous phase, because it will be positioned further away from the sun.
So, keep an eye out, and you might just catch a glimpse of the moon during the day!