When was Tomb-Sweeping Day established as Tomb-Sweeping Day in the solar terms?

1. It is said that the origin of Tomb-Sweeping Day began with the "grave-sweeping" ceremony of ancient emperors and generals. Later, people followed suit, and it became a fixed custom of the Chinese nation to worship ancestors and sweep graves on this day.

2. Qingming was just the name of a solar term at first, and later became a festival to commemorate ancestors, which was related to the Cold Food Festival. Jin Wengong designated the second day of the Cold Food Festival as Tomb-Sweeping Day.

3. The traditional Tomb-Sweeping Day of the Han nationality in China began in the Zhou Dynasty and has a history of more than 2,500 years. Influenced by the Han culture, 24 ethnic minorities in China, such as Manchu, Hezhe, Zhuang, Oroqen, Dong, Tujia, Miao, Yao, Li, Shui, Jing and Qiang, also have the customs of Tomb-Sweeping Day.