What does the summer solstice stand for and what is its significance? Please explain.

Summer solstice is one of the 24 solar terms, which occurs on June 20th, or 2 1, or 22nd of the Gregorian calendar every year. On the day of summer solstice, the sun moves to 90 degrees of the yellow meridian, and the position of the sun directly on the ground reaches the northernmost point of the year, almost directly on the Tropic of Cancer. At this time, the daylight hours in all parts of the northern hemisphere reach the longest in the whole year. For the Tropic of Cancer and its northern area, the summer solstice is also the highest day of the year at noon.

Astronomical experts say that the solstice in summer is the turning point of the sun. After this day, it went back, and the point of direct sunlight moved southward from the Tropic of Cancer, and the days in the northern hemisphere became shorter day by day. After the summer solstice, the Tropic of Cancer and its northern region, the midday sun height angle also began to decrease. At the same time, after the arrival of the summer solstice, the stars in the night sky gradually became summer stars.

In summer, the outdoor sun is full. After the summer solstice, the diet should aim at clearing away heat and relieving summer heat and stimulating appetite, eat more bitter food and make up for it. After the summer solstice, the temperature rises gradually, and the amount of perspiration will also increase, so the water demand is large and more water should be added.