Because the sun is on the same side of the earth as you are.
Because the Earth is spinning around, one side is always dark (facing away from the sun) the other is facing the sun and that is during the day!!! :)
a solar eclipse
The moon is always in the sky, the reason we can see it at any time is because it reflects the brightness of the sun. During the night the earth revolves so that the sun is on the opposite side of the earth. During the day the sun shines so much brighter than the moon's reflection so we ultimately see the sun first.
The Sun
During the day, the sun is at its brightest and the moon is directly opposite the sun. Therefore, you will never see a full moon during the day because the moon is always changing position in relation to the sun.
because the light from the sun is so close to us and so bright it blocks out the light from the other stars. The only time you can see light from other stars during the day is during a solar eclipse.
Look outside during the day.
Because the sun is far to bright in relation to the light from the stars.
First of all, the sun's presence in the sky is what defines that time as day. Secondly, most stars are out during this time; we simply can't see them with the naked eye because the sun is so many times brighter and drowns them out.
You can see the sun during the day time when there are a few clouds and light out. Cyberchief If this answer helped you and you appreciate the fact that time was taken out of somebody's personal day to write the answer to this question, please support the contributor by clicking "Recommend Contributor" button below at the bottom of this answer box.
Stars shine at nighttime but not in the daytime because it is dark. During the day the sun is bright which blocks the light from the stars. Once the sun is down and the sky is dark, it is easier to see the glimmer.
Some people expect to see the Sun during the day, and the Moon in the darkness of the night. But, depending on the position the Moon has reached in its orbit round the World, the Moon may appear during the day. Once the Sun is shining brightly, the Moon is less, if not impossible to see, because of the brightness of the daylight. Early dawn or twilight, when the sky is not too bright is the best time to see that the Moon, in all its phases, can appear during the day.
At night, or during an eclipse of the Sun, or when it's cloudy.