The longest sunny day in a year.

The longest sunshine time in a year is the summer solstice, which was also called "Summer Festival" and "Summer solstice Festival" in ancient times. In the ancient summer solstice, people prayed for disaster and prosperity by offering sacrifices to God. "Li Zhou Guan Chun Zong Bo San Si Wu/Shen Shi" contains: "The summer shows ghosts, in order to eliminate the fierce famine of the country and the loss of the people." Sacrificing to God in the summer solstice of the Zhou Dynasty means eliminating plague, famine and starvation.

Historical Records records: "On the solstice of summer, people worship the land with music and dance." As an ancient festival, the summer solstice began in the Song Dynasty, and officials have a three-day holiday. In Liao Dynasty, this day was called "summer solstice", and women entered colorful fans and gave each other powder and fat capsules. Summer solstice is close to perihelion, winter solstice is close to perihelion, and perihelion's earth revolution speed is fast, while perihelion's earth revolution speed is slow, resulting in long summer and short winter.

Dietary customs in summer solstice

"Winter solstice jiaozi, summer solstice noodles", delicious Beijingers and Shandong people pay attention to eating noodles on summer solstice. According to the customs of old Beijing, lettuce and cold noodles can be eaten on the first day of the summer solstice every year, because the climate is hot at this time, eating something cold can reduce the fire and stimulate the appetite, and it will not damage the health because of the cold.

In summer solstice, noodle restaurants in Beijing are very popular. No matter Sichuan cold noodles, Dandan Noodles, braised pork noodles or zhajiang noodles, all kinds of noodles are very popular. "However, the summer solstice is not hot." "The summer solstice is already three years old." Astronomy stipulates that the summer solstice begins in the northern hemisphere, but the solar radiation heat received by the surface is still more than the heat released by the surface.

Refer to the above? Baidu encyclopedia-summer solstice