When is the long summer every year?

The long summer falls on May 5th or 6th every year, and the climate of the long summer is characterized by approaching intense heat and more thunderstorms. The long summer is full of sorghum and cicada rain. Astronomically, Chang Xia said that bidding farewell to spring is the beginning of summer. 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.

The ancient book "Twenty-four solar terms" says that "the foundation is also necessary" and "summer is also false, and everything is false at this time". The "false" here means "big", which means that spring goes and summer comes, and everything grows up to now, hence the name "long summer".

The long summer is the peak season for all things to grow. Among the 24 solar terms, the interval of each solar term is 15 days, and every 15 days is divided into three periods. Every climate has periodic natural phenomena, such as animals, plants, birds and weather, which change with the seasons. These phenomena are called "phenology". Long summer is divided into three stages: the first stage is the sound of crickets, the second stage is the appearance of earthworms, and the third stage is the birth of king melons. First, you can hear the chirping of crickets in the field, then you can see earthworms digging in the soil, and then the vines of pumpkin (the medicinal plant of Trichosanthes kirilowii) begin to climb and grow rapidly. At this time, everything has faded from the tenderness of spring, and fruits, vegetables and wild vegetables are flourishing.