How to divide the lunar calendar into the solar calendar?

The differences between the solar calendar and the lunar calendar are as follows:

Gregorian calendar is Gregorian calendar: We mainly use the international calendar, namely Gregorian calendar. It takes a tropical year as a year, and then divides it into twelve months (the number of months is 3 1 day, 30 days and 29 days, all of which are artificially specified), which is called the solar calendar, that is, the solar calendar.

In addition to the Gregorian calendar, China also retains the calendar that has been used since the Xia Dynasty: the Summer Calendar, which takes period of revolution with twelve moons as a year, so the time of a year is more than ten days less than that of a tropical year, so it is called the lunar calendar by putting a leap in the square (the moon is called the lunar calendar). It also contains calendar knowledge such as 24 solar terms, which is closely related to agricultural production, so it is also called the lunar calendar.