When is the garrison month?

The moon refers to the ninth month of the lunar calendar, corresponding to the solar calendar 10 month. The moon is a traditional calendar.

The lunar calendar takes the change cycle of the moon phase, that is, the length of the moon is one month, plus the "24 solar terms" of the elephant calendar, and takes the length of the tropical year of the sun as the year. By setting leap months, the average calendar year adapts to the tropic year.

Lunar calendar is one of the traditional calendars in China, also known as old calendar, Han calendar and ancient calendar. Lunar calendar is a kind of lunar calendar, which is usually called lunar calendar by mistake among the people. The lunar calendar belongs to the combination of yin and yang.

Generally speaking, the full moon and the ugly moon are the earthly branches of the traditional equinox method. It is based on a solar term cycle, from the beginning of the solar term to the end of the next solar term, that is, the cycle of the month represented by a certain earthly branch.

The months represented by the twelve earthly branches have a relatively stable correspondence with the Gregorian calendar months, always from two days before and after the 6th of the current month to two days before and after the 6th of next month, which is quite different from the lunar calendar months. This is because the lunar calendar has a wet month every few years.