In the traditional calendar, it includes not only astronomical meteorology and seasons, but also some etiquette and customs that people need to abide by in their daily lives. This book absorbs the advantages and advantages of these calendars. In addition to introducing the knowledge of ancient calendars, it also combines the ancient folk culture of China and the essence of Yijing mathematical technology, and explains them in a modern way. It is rich in content and practical. Readers can put it on their desks and ask it all kinds of life questions at any time to increase their wisdom in dealing with the world.

Authoritative interpretation of perpetual calendar law, modern interpretation of China folk customs, new exploration of Yijing prediction, and detailed explanation of auspicious culture.