Why does the lunar calendar still exist?

Lunar calendar, a kind of lunar calendar, has a long history and mature technology. It is not only practical, but also has high cultural value. China is a big agricultural country, and calendar research has been a national event since ancient times. The inheritance and research of calendar can reflect the previous scientific development, which is very important for the inheritance and inheritance of culture. Now researchers studying the calendar can understand the development of the ancients at the beginning and how they observed the world and created such a brilliant era.