2. Tomb-Sweeping Day, also known as outing festival, outing festival, March festival and ancestor worship festival, is celebrated at the turn of mid-spring and late spring. Qingming has two connotations: nature and humanity. It is both a natural solar term and a traditional festival. Tomb-Sweeping Day is a traditional major Spring Festival. It is a fine tradition of the Chinese nation for thousands of years to sweep graves and cherish the memory of ancestors. It is not only conducive to promoting filial piety and family memory, but also conducive to promoting the cohesion and identity of family members and even the nation. Tomb-Sweeping Day's integration of natural solar terms and humanistic customs is a combination of humanistic and natural conditions, which fully embodies the Chinese ancestors' pursuit of harmony between heaven, earth and people, pays attention to conforming to the right time, place and people, and follows the laws of nature. Tomb-Sweeping Day is rich in festivals and customs. Grave-sweeping and hiking are two major themes of etiquette and custom in Tomb-Sweeping Day. The two traditional themes of etiquette and custom have been passed down in China since ancient times and have never stopped.

Qingming is an ancient festival of the Chinese nation. It is not only a solemn festival to sweep graves and worship ancestors, but also a happy festival for people to get close to nature, go for an outing and enjoy the fun of spring. The weather in Tomb-Sweeping Day is usually around April 5th of the Gregorian calendar, that is, the first15th day after the vernal equinox. At this time, vitality is booming, yin qi is declining, everything is "going to the old and welcoming the new", and the earth presents a scene full of spring, which is a good time to go for an outing in spring and sweep the graves to worship the ancestors. Tomb-Sweeping Day, who worships his ancestors, is very long. There are two statements: 8 days before 10 and 10 days before 10. These nearly 20 days belong to Tomb-Sweeping Day who worships his ancestors.