In the northern hemisphere, the days are getting shorter and the nights are getting longer.

In the northern hemisphere, after the summer solstice and before the winter solstice, the days get shorter and the nights get longer. On the summer solstice, the sun shines almost directly on the tropic of cancer, so it is the longest day of the year in the northern hemisphere. After the summer solstice, the position of the direct sunlight on the ground gradually moved southward, and the days in the northern hemisphere began to shorten day by day.

After the summer solstice, it entered the hot summer, which was called "Fu Ri" by the ancients and "Fu Ri" by the present, so there are also activities of "summer escape" from the summer solstice.

Extended data:

The summer solstice is a day that separates the changing trend of the duration of a day, so the ancients thought that this day represented some kind of alternation of yin and yang. This is the ancient people in China who divided the summer solstice into three stages: "One stage is staghorn decomposition; Second, wait for cicadas to start singing; Third-class Pinellia can be seen.

One antler solution: the ancients thought that the antlers were forward, so they belonged to Yang. From the summer solstice, Yin Qi was born, and Yang Qi began to decline, so the antlers began to fall off at this time. Second, the cicada begins to sing: after the summer solstice, the male cicada will drum up and sing.

"Pinellia ternata" in the third season is a shade-loving herb, named after it was born in a swamp or paddy field in midsummer. It can be seen that in the hot summer, some yin-loving creatures began to appear, while positive creatures gradually declined.

Popular science China-solar terms tips: On the midsummer solstice, "the sundial is already cloudy."