Question

Why sometimes the moon is seen during day?

Answer 1

As it turns out, whether or not we can see the moon during the day depends on the brightness of its light —which is really just the sun’s light reflecting off of the moon’s surface—and the earth’s rotation.

In order for the moon to be visible in the sky, it needs to be above the horizon. On average, the moon is above the horizon 12 hours a day. Some of those 12 hours are bound to coincide with the sun’s—producing a daytime moon. Which, despite how exciting it can be to see, isn’t that rare. In fact, the moon is visible during the day nearly every day, except for when it’s close to a new moon or is a full moon.