What day is April 20th?
Grain Rain is the sixth solar term among the 24 solar terms and the last solar term in spring. Every year from April 19 to April 2 1 day, when the sun reaches 30, it is Grain Rain, which comes from the old saying "Rain makes a hundred valleys". At the same time, it is also the best time for sowing, transplanting and ordering beans.
According to meteorologists, Grain Rain is the last solar term in spring, and the arrival of Grain Rain solar term means that the cold wave weather is basically over and the temperature rises faster, which is very beneficial to the growth of cereal crops.
Extended data:
Twenty-four solar terms division:
"Twenty-four solar terms" and "December construction" are the basic contents of the main branch, which have been concluded in ancient or ancient times. According to ancient records, Emperor Tiandi began to determine his age in the name of cadres and branches. The solar terms are determined by the direction of the top of bucket handle in the Big Dipper. A year is divided into twelve days, and the "sword" represents the direction of the top of bucket handle in the Big Dipper.
At the age of one, bucket handle rotates and refers to "Twelve Chens" in turn, which is called "December Building" (or "December Order"). Bucket handle is a cycle around the east, south, west and north, starting from beginning of spring and ending in severe cold. The bucket handle of Beidou points to some solar terms, which is the natural result of celestial bodies' movement.
Baidu Encyclopedia-Grain Rain