What do summer solstice and winter solstice mean?

1, the summer solstice refers to the day when the sun moves to 90 degrees of the yellow longitude, and generally crosses from June 2 1 day to 22/day of the Gregorian calendar. The winter solstice refers to the day when the sun reaches 270 degrees of the yellow meridian, usually around 65438+February 22 in the Gregorian calendar. The winter solstice is opposite to the summer solstice, which is one of the 24 solar terms in China.

2. On the summer solstice, the sun shines directly on the Tropic of Cancer. At this time, the daytime in all parts of the northern hemisphere reaches the longest in the whole year, and the higher the latitude, the longer the daytime. For the Tropic of Cancer and its northern area, the summer solstice is also the highest day of the year at noon. On the solstice in winter, the direct sunlight reaches the southernmost point of the year, almost directly on the tropic of Capricorn. On this day, the northern hemisphere gets the least sunshine, 50% less than the southern hemisphere. The days in the northern hemisphere are the shortest, and the farther north they are, the shorter they are.