Generally speaking, from February 18 to 20 every year, around the 15th day of the first lunar month in our country, the sun reaches the position of 330 degrees of the yellow meridian. For China people in the northern hemisphere, the weather phenology in this period has changed again compared with before. The sunshine hours and intensity in the northern hemisphere are increasing.
As the temperature rises rapidly, warm and humid air from the ocean becomes active and gradually pushes northward, frequently competing with cold air from the mainland. This solar term is called rain. Of course, this statement is correct, but it is not rigorous. For example, in 2020, the annual meeting of the boxer will have a leap in April, so the solar term of the sad and ugly year of 202 1 is quite different from the tradition.