The meaning of "rain" in the 24 solar terms

The rain solar term is the second of the 24 solar terms, which indicates the arrival of spring. Its main meanings include the beginning of rainfall, the increase of rainfall, vitality and abundance. The rainy solar term usually starts from February 18 of Gregorian calendar and ends on March 4 or 5. At this time, the direct point of the sun gradually approaches the equator, the sunshine hours and intensity in the northern hemisphere increase, and the temperature rises rapidly. Warm and humid air from the ocean becomes active and meets the cold air in the north to form rainfall. Rainy and solar terms, changeable weather, is the season with more cold waves. At this time, the snow and ice melt, and the precipitation increases, mainly manifested as light rain or Mao Mao rain. In farming culture, the solar term of rain is particularly important for the growth of crops, because suitable precipitation is helpful for the growth and development of crops. In addition, the solar terms of rain are also related to a variety of folk customs, such as the "Lababao" in Sichuan, and the custom of the son-in-law sending festivals to his parents-in-law.