1, the thirtieth day or the first day of the lunar month, is called the new moon or crescent moon. The moon can't be seen on the earth because it is blocked by light.
2. The third and fourth days of the lunar calendar, known as the new Emei moon, face the west. When the sun sets, it appears in the sky about 45 degrees in the west and disappears on the western horizon around 9 pm.
The seventh and eighth days of the lunar calendar are called the first quarter moon, and the moon faces west. When the sun goes down, it appears at noon and disappears on the western horizon at around 12 in the evening. ?
4. On the 11th and 12th day of the lunar calendar, the moon phase becomes convex and the moon faces west. When the sun sets, it appears in the sky about 45 degrees in the east and disappears on the western horizon around 3 am.
On15th and16th of the lunar calendar, it is called the full moon or the moon. The surface of the moon is round. The sun rises from the eastern horizon at sunset and disappears on the western horizon at sunrise the next day. ?
6. On lunar calendar 18 and 19, the sun and the moon turn into a convex moon, facing east, rising from the eastern horizon around 9 pm, and disappearing into the space around 45 degrees west longitude when the sun rises the next day.
7. On the 22nd and 23rd day of the lunar calendar, called the last quarter moon, it faces the east, rises from the eastern horizon around 0: 00 at night, and disappears directly above the ground when the sun rises the next day. ?
8. The 27th and 28th days of the lunar calendar are called the waning moon. The moon faces east, rises from the eastern horizon around 3 am, and disappears in the space about 45 degrees in the east when the sun rises.
The moon mainly has four phases: the new moon (the first day of the lunar calendar), the first quarter moon (about the eighth day of the lunar calendar), the full moon (about the fifteenth day of the lunar calendar) and the last quarter moon (about the twenty-third day of the lunar calendar), all of which have definite occurrence times and are calculated by precise orbit calculation.
Extended data
The significance of the moon phase
(1) tide
The phase of the moon is related to the tide of the ocean, because the tide is directly related to the gravity of the moon, for example, a full moon will cause a spring tide. The change of tides directly affects people's lives. Military affairs, tourism, ocean navigation, marine fisheries, mariculture, marine engineering, scientific experiments and various coastal production activities are all affected by tides.
(2) Lighting
Because the lighting in the sky at night mainly depends on the moon, people must also consider the moon phase when they are active at night, especially in remote and barren areas.
(3) Religion
It is related to some religious activities, especially Islam, which is Ramadan.
(4) Hint
China has attached importance to the full moon since ancient times, and the full moon often represents perfection, smoothness and auspiciousness.
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