From which day did the days become shorter and shorter?

After the summer solstice, the days get shorter and shorter.

The solstice in summer is the longest day and the shortest night in a year. After the summer solstice, the days begin to get shorter and the nights begin to get longer. In the autumnal equinox, the day is as long as the night, and then in the winter solstice, the day is the shortest and the night is the longest.

Characteristics of summer solstice

Summer solstice was also called "Summer Festival" and "Summer solstice Festival" in ancient times. The ancients said: "The days are long, the shadows are short and extremely extreme, so it is called the summer solstice." In summer, the sun shines directly on the Tropic of Cancer. At this time, the daylight time in all parts of the northern hemisphere reaches the longest in the whole year, and the higher the latitude, the longer the daylight time. For the Tropic of Cancer and its northern area, the summer solstice is also the highest day of the year at noon.

There are many rainstorms in summer, and some areas in the middle and lower reaches of the Yangtze River and the Jianghuai Basin are prone to rainstorms. In summer, due to the strong ground heating, the air convection is strong at this time. From afternoon to evening, thunderstorms are easy to form. This thunderstorm is relatively small, and it comes and goes quickly.