The Lunar Calendar is the current modern calendar in China, so why is it that the number of days in the Lunar Calendar varies from year to year?

This is mainly because the Lunar Calendar itself is an artificially regulated calendar, and the concept of leap months also exists, so the time of the Lunar Calendar itself belongs to one big cycle, and at the same time is different from each other.

Whenever we talk about calendars, the first thing we do is to distinguish between the solar calendar and the lunar calendar, which is the one we often refer to as the lunar calendar. In ancient societies, people at that time used the lunar calendar to calculate time, and we can also understand the calculation of the lunar calendar as one of our traditional cultures, and many of the important festivals themselves are also calculated on the lunar calendar.

There is a difference between the lunar calendar and the solar calendar.

In the traditional Chinese calendar, there is a calendar called the lunisolar calendar which is known as the lunar calendar in China. The lunar calendar is a new calendar created by our ancestors to meet the needs of mankind's long-term and complex production, life and development. Yang calendar, on the other hand, belongs to the Western democratic calendar, which is a calendar program proposed by ancient Greece and other countries. The Yang calendar is a new type of lunar calendar formed and developed by the Chinese according to the idea of the opposition between yin and yang, which is based on the laws of the sun's orbit and the implementation of intercalary leap month method.

? The lunar calendar itself will have this certain difference between the length of the month and the length of the day.

You can try to understand it this way, because our farmers themselves belong to a man-made regulated calendar, and the length of the month varies from month to month. If we were to view the lunar calendar within a single year, it would essentially not change much. But if we stretch the timeline to three years or even 10 years, we will find that the time difference between the lunar calendars is very large, and even up to about a month in some months. In this case, of course, there may be a direct confusion between the concepts of lunar and solar calendars, as well as a misinterpretation of competence as a solar calendar.

In addition to this, because the lunar calendar itself is a calendar calculated by the variation of the sun's altitude, there will be a certain amount of difference in this calculation itself, so this difference may also lead to a certain amount of error in distinguishing between the lunar calendar and the solar calendar, and the length of this error will vary somewhat according to the specific conditions of each year.