What does 202 1 changxia mean? 202 1 understanding of changxia.

1, May 5th or May 6th is the long summer of the lunar calendar every year. "The bucket refers to the southeast, and the dimension is long in summer. Everything grows here, hence the name Long Summer. " At this time, the longitude of the sun is 45 degrees. Astronomically, Chang Xia said that bidding farewell to spring is the beginning of summer days. When the temperature rises obviously, the summer heat comes, thunderstorms increase and crops enter the peak season, people are used to taking long summer as an important solar term.

2. The long summer, like beginning of spring, beginning of autumn and beginning of winter, marks the beginning of four seasons in astronomy. When the sun in Xia Zhishi reaches 45 degrees, it is the moment when summer begins. However, the temperature varies from place to place, and the time of entering summer is actually inconsistent. According to climatology, the five-day average temperature is higher than 22℃ as the summer standard.