Summer solstice in the twenty-four solar terms

The summer solstice is one of the 24 solar terms, which falls on June 2 1 or June 22 and 23, and the summer solstice of 202 1 falls on June 2 1: 32.

On the day of summer solstice, the sun moves to the 90th meridian (near Gemini), and the sun shines directly on the Tropic of Cancer. At noon on this day, people on the Tropic of Cancer can see the wonderful sight of "no shadow at noon". At this time, the sunshine time is the longest in the northern hemisphere, while it is winter in the southern hemisphere.

Summer solstice is also one of the earliest four seasons established by the ancients. "Book of Rites" also records the phenological phenomena of solar terms in the summer solstice in nature: "On the summer solstice, antlers dissolve, cicadas begin to sing, Pinellia ternata is born, and hibiscus is glorious." After the summer solstice, it will enter a few days. According to the theory of traditional Chinese medicine, summer is the season with the highest yang. Health care should conform to the characteristics of "yang is abundant outside", pay attention to protecting yang, and focus on a "long" word.