When did you say the moon shines every month?

The new moon of the first day is called "New Moon", and Shuowen says "The first day begins with the new moon."

The full moon on the 15th is "looking", because at this time the earth is between the moon and the sun, and the sun and the moon are far apart.

Chord refers to the first quarter of the eighth day of the seventh lunar month and the second quarter of the 23rd lunar month.

The last day of the moon phase is "gloomy", and Shuowen explains: "gloomy, the moon ends."

In particular, the first day of the lunar calendar must be the first day of the lunar calendar, and the dark day must be the last day of the lunar calendar (the 30th day of the big month and the 29th day of the small month). Looking at the fifteenth lunar month, I hope it is the sixteenth lunar month.

Extended data:

In the highest scientific astronomical calendar in ancient times, we are the only civilization in the world that adopted the lunar calendar. According to the repeated revolution of the sun, the cycle of hot and cold weather is determined. We use sundials to observe astronomical stars and time, forming four seasons and twenty-four solar terms. Make the month and time according to the changing period of the moon phase. From this, a combined calendar of yin and yang is formed, which is used to guide state affairs.

The records of historical events and astronomical phenomena in the history of China are very detailed, and the history of trust is far from being compiled by foreign countries. For example, according to the records of Halley's Comet and the astronomical phenomena of the moon recorded in bronze inscriptions, the specific date when King Wu cut the moon was calculated.