What does seasonal antiquity mean?

In ancient times, seasons were decrees issued by seasons, which were mainly divided according to agricultural time, so now they refer to seasons and festivals. From the Book of Rites: "In winter, the son of heaven and the doctor discuss the national code for the coming year."

In some folk places, some festivals are regarded as festivals. Therefore, the four seasons refer to ceremonies and festivals carried out in the order of seasons. In the historical development, the 24 solar terms have been incorporated into the lunar calendar and become an important part of the lunar calendar. In the process of using the 24 solar terms to engage in agricultural activities, the ancients established some dates similar to the solar terms, long or short, and with certain climatic characteristics, which were called festivals.