What is the phase of the moon every month?

On the first day of every month, the sun rises and sets with the moon, and the moon disappears all night.

2. First quarter moon:

On the seventh and eighth days of every month, I see the moon in the western sky in the middle of the night. At this time, the moon bends to the west.

3. Full Moon:

On 15 and 16 every month, the sun and the moon rise and set, and the moon can be seen all night.

4. Last quarter:

On the 22nd and 23rd of every month, I will see the moon in the eastern sky at midnight. At this time, the moon bends eastward.

Extended data:

The reason for the moon's change:

This is because the moon itself does not shine, and the moon we see is the part illuminated by the sun. The illuminated part does not always face the earth.

For observers, with the change of the relative positions of the sun, the moon and the earth, the moon presents different shapes on different dates, which is the periodic change of the moon phase.

Furthermore, although the moon is always illuminated by the sun, and the half sphere is bright, because the moon is constantly revolving around the earth and changing its position, the half sphere facing the earth and the half sphere illuminated by the sun sometimes completely overlap, sometimes completely do not overlap, sometimes a small part overlaps, and sometimes most of them overlap, so the moon presents a cloudy or sunny change.