Sanghyun
It is the time when the straight line connecting the earth, the sun, the earth and the moon becomes orthogonal after seeing the western half of the moon after the cutting, or the phenomenon, and it is manifested between 7-8 days by the lunar calendar. It can be seen in the southern sky after the sun, but in fact it is possible to observe at noon. It rises in the east sky at about noon. And, when the first moon floats in the western sky, it begins to pass one day from this time. In other words, when the first month is in the west, it is midnight. And, from the first month onwards, the average of the day is 50 minutes late every day, so the time of the rising month last month is getting slower as well as the time of the middle of the month. . So, when the moon, which is 12-14 days before the full moon, falls to the west, it will go to the first dawn. As a result, except for the crescent moon, all the days after the first month are over.