One of them is solar terms and festivals.

Tomb-Sweeping Day is both a solar term and a festival, and Tomb-Sweeping Day atmosphere provides important conditions for the formation of Tomb-Sweeping Day customs in terms of time and weather phenology.

Tomb-Sweeping Day Qi, which is related to the phenology of 20 years old, is often used to guide farming, indicating that the weather is fine and spring ploughing is timely. Tomb-Sweeping Day is a day when people pay homage to their ancestors and pursue the future cautiously.

Qingming is a solar term that reflects the phenological changes in nature. At this time, the sun is shining, plants are sprouting, flowers are in full bloom, the air is fresh, everything is alive, and nature presents a vibrant scene.

Extended data:

Qingming farming activities

During the Qingming Festival, the temperature gets warmer, plants sprout, the weather is fine and everything is thriving. Dry farming in the north and early and middle rice in the south of the Yangtze River have entered a suitable season for mass sowing. People rolled up their sleeves and trouser legs one after another, and it was sunny to sow in the fields and sow early. North and south of the great river, inside and outside the Great Wall, there are busy scenes of spring ploughing everywhere.