Why is Tomb-Sweeping Day a traditional festival in China?

Tomb-Sweeping Day, also known as the outing festival, is at the turn of mid-spring and late spring. Tomb-Sweeping Day is a traditional festival in China, and it is also one of the most important sacrificial festivals. It is a day to sweep graves and worship ancestors. Tomb-Sweeping Day is a traditional festival of the Chinese nation, which started in the Zhou Dynasty and has a history of more than 2,500 years. Through the historical development and evolution, Tomb-Sweeping Day has extremely rich connotations, and different customs have been formed in different places, with sweeping graves to worship ancestors and hiking as the basic themes.

The name of Tomb-Sweeping Day is related to the meteorological and climatic characteristics at this time. According to the Western Han Dynasty's "Huainanzi Astronomical Training", "Fifteen days after the vernal equinox, fighting refers to B, the wind is clear"; "Qingming Wind" is a refreshing and clear wind. "When I was in 100 questions" said, "Everything grows at this time, clean and bright. So it is called Qingming. " "Almanac": "On the fifteenth day after the vernal equinox, the bucket refers to Ding, which is used for Qingming, when everything is clean and bright, and when it is covered, everything is clean and bright, hence the name." As soon as Qingming arrives, the temperature rises and the earth presents a beautiful scene of spring. At this time, everything "spits out the old and absorbs the new".