What is the sun day, the sun day in folk customs?

There are two concepts of Sun Day. One is the concept of folklore, which refers to the birthday of the sun. It's June 19th of the lunar calendar, and it's recorded in the yellow calendar. The second refers to the "Japanese Obsidian Day" in China's ancient "Seven Obsidian Days", which coincides with the Western Sundays. Sun Day, Sun Day is the predecessor of Sunday. Since ancient times, Rome has been designated as a rest day, and people engage in worship activities without working. Latin, dies solis. Sunday refers to the day after Saturday and before the next Monday. The Latin name of Sunday is dies solis, which means Sun Day. French is dimanche, which comes from Latin word, meaning "the day of the Lord"; English is Sunday, which comes from Sun Day. Russian is вокресенье, which means "Sunday".

according to modern science, the solar day is a day and night. It is sidereal day (the rotation period of the earth)+the revolution angle of the earth in one day (.986).

The time of a solar day is not equal. According to the calculation of the time of a long tropical year and a short tropical year, the difference between a long solar day and a short solar day is 4 seconds under the action of solid tides. This proves that the earth's rotation is not uniform.

Origin of Folk Sun Day:

The earliest and most popular Sun Day in Chinese history is June 19th of the lunar calendar, and there is a custom of celebrating the Sun Festival, offering sacrifices to the Sun God and celebrating the birthday of the Sun in Rizhao.

In China's lunar calendar, only June 19th is the Sun Day (that is, the Sun's birthday) and the Bodhisattva's enlightenment day.

The custom of sun worship in Rizhao is the Lower Sun Festival in Tiantai Mountain, which has the longest history, the largest scale and the most extensive influence.

regarding the history of the old mother temple, Wang Yan of Qing Dynasty recorded in whispers-Records of Meteorite Collection: "Rizhao Meteorite: Shipen Mountain, 4 miles south of Rizhao County, Yizhou Prefecture. "Huai Nan Zi Lan Ming Zhang Yun:' In the past, the four poles were abolished, Kyushu was split, and the sky was not repeated, and the land was not well-contained; The fire will not die, and the water will never stop; Beasts eat the people, while birds prey on the old and the weak. So Nu Wa refined the five-color stone to make up the sky, breaking the claw was enough to set up four poles, killing the black dragon to help Jizhou, and accumulating reed ash to stop the lewd water. Heaven makes up, four poles are positive; The water is dry, and Jizhou is flat; If a cunning worm dies, it will ruin people's livelihood; Back to the state, holding a round sky. " There is still a horseshoe-shaped crater on the top of the mountain, and meteorites are scattered in it. At the foot of the mountain, there are meteorites standing outside the south gate of Yu Tao Luonan.

It is not recorded when the Temple Fair of the Old Mother Temple (Sun Festival) started. Legend has it that since ancient times, people in Rizhao have had the custom of catching up with temple fairs. While offering sacrifices to the gods, people should also carry out business and folk entertainment activities. Therefore, every year, on the birthday of the Sun God on the 19th June of the lunar calendar, the old mother temple under Tiantai Mountain will hold a temple fair, which is a great event in Taoluo and Rizhao. Villagers from hundreds of miles around come to catch the temple fair, offer sacrifices to the sun and mother, and pray for a bumper harvest and happiness and well-being. The villagers will also display and exchange the local products they produce, and at the same time invite special theatrical troupes to perform programs. It is said that the scene is grand and lively. During the Northern Wei Dynasty, Hui Shen built Tiantai Temple near the mother temple in Tiantai Mountain. Since June 19th of the lunar calendar is also the enlightenment day of Guanyin Bodhisattva, Buddhist culture is naturally integrated into the local custom of Sun Festival. Therefore, on the day of the Sun Festival on June 19th of the lunar calendar, people not only offer sacrifices to the sun and their mothers, but also worship the Bodhisattva. It is worth noting that the building itself of Shihu Temple also reflects the combination of primitive sun worship and Buddhist culture. It is said that the temple is carved with beams and painted with buildings, the main hall is dedicated to Buddha statues, and the murals are traditional myths and legends such as xi he Bathing Day, The goddess patching the sky, the Goddess Chang'e flying to the moon and Dayi Shooting Day.

The large-scale festival of the Old Mother Temple Fair (Sun Festival) continued until the liberation. Later, a bizarre wooden knife murder accident happened at the temple fair, and the temple fair activities were interrupted. At that time, the theatrical troupe staged the plot of Guan Gong's plan to behead Cai Yang in the Romance of the Three Kingdoms. It is said that the actor who played Guan Gong held a wooden knife and fell with his hand, and actually cut off the head of the actor who played Cai Yang. Since then, the temple fair has been terminated. But among the people, people still keep the custom of eating bread on the day of the Sun Festival.