Was it also called Arbor Day in ancient Tomb-Sweeping Day?
According to the centenarian question, "everything grows clean and bright at this time." So it is called Qingming. " As soon as Qingming arrives, the temperature rises and the rainfall increases, which is a good time for spring ploughing and planting. Therefore, there are agricultural proverbs such as "planting melons and beans before and after Qingming Festival" and "planting trees is not as good as Tomb-Sweeping Day". It can be seen that this solar term is closely related to agricultural production.
Tomb-Sweeping Day is one of the 24 solar terms in China, and the Gregorian calendar falls on April 5th every year. This festival is listed as a national statutory holiday for three days. Because the 24 solar terms objectively reflect the changes of temperature, rainfall and phenology throughout the year, ancient working people used them to arrange agricultural activities. "Huainanzi Astronomical Training" says: "Fifteen days after the vernal equinox, the bucket refers to B, and the Qingming wind is coming."