How many years does the calendar cycle?

There are no cycles in the perpetual calendar. A 60-year cycle is the part of a year in which cadres and cadres record the years. The laws of the lunar calendar are very complicated, and there is no so-called cycle. Can only say that there is an approximate similarity. That is, within a certain year, occasionally some calendars are the same. Remember that it is a "part". After this part, the next part will not be repeated, that is, it will not constitute a cycle.

There is some code in my space, and it can be seen that there is no loop. Because the lunar calendar is based on "astronomical phenomena".

Probably the current lunar calendar is the Zijin calendar:

Older people are: the longitude of the sun is 270 degrees to the longitude of the next sun is 270 degrees, and the moon where the winter solstice is located is 1 1 month of the next month;

The length of a month is: the difference between the sun and the moon is 0 degrees, and the next day when the difference between the sun and the moon is 0 degrees is the first day;

The length of a day is: from the zenith under the sun (180 degrees) to a zenith under the sun (180 degrees);

Length of lunar solar terms (China Lunar Zodiac): every 30 degrees from the solar meridian 3 15 degrees, a total of 12 lunar solar terms (China Lunar Zodiac), represented by 60 branches;

The moon goes around the earth, and the earth goes around the sun. What about the sun? It is almost impossible for the sun and the moon to meet around the milky way.

The calculation of perpetual calendar requires many astronomical parameters, and even the time of sunrise and sunset has no cycle. Do not believe me, just copy the code in my space. .

Do you think it is possible for the perpetual calendar formed by combining the western calendar to have a cycle of less than ten thousand years?