October 15th refers to October 15th of the lunar calendar. Today is the1October 12 of 202 1, and it will be1October 15 in two days. The moon is round, which means it's sunny. If it is not sunny, it is not round, so you will see the round moon at night.
On 15 and 16 of the lunar month, the moon moves to the outside of the earth, that is, the sun and the moon are located on both sides of the earth. Because there is an included angle θ between the ecliptic plane and the ecliptic plane, the average value is 5 09'. Under normal circumstances, the earth can't stop sunlight, and the bright side of the moon faces the earth, so people can see a full moon, which is called the full moon or the moon.
When the sun sets at night, the full moon rises from the eastern horizon, lies in the southern sky at midnight and sets on the western horizon in the morning. You can see the moon all night.