The first day of Seven Obsidian Day is Sunday, which is called Obsidian Day.
Yu Shu Shun Dian Shang Shu: "In Yuheng, Xuan Ji, Qi Qi is in charge".
Zheng Qi is talking about the sun and the moon, and the five stars of fire, water, wood, gold and earth.
They are used as calendars for calculating cycles and are imported from abroad.
This method of calculating the number of days was introduced to China in the 4th century A.D. and again from Guo Kang in Central Asia.
Finally, it becomes a general way of counting weeks, that is, "seven obsidians".
And it will take thousands of years.
Until the late Qing dynasty.
1905 (thirty-one year of Guangxu), the Qing court abolished the imperial examination system and established the "academic department".
Under the personal leadership of Yuan Jiagu, director of the Department's Compilation Bureau, many unified new terms have been formulated, including "Zhou".
They are called a week, and are numbered from Monday to Saturday according to international practice.
Zhou and Japan called the sun an obsidian day, marked by the sun, which coincides with western habits.
In Latin, this day is dies solis, which means sun day; English is Sunday, and it is also the sun day.
Therefore, in order to keep China's tradition and keep up with the international standards, the name "Sunday" was born in the new weekly calendar.
This is the origin of "Sunday".
Extended data:
"week" source
The names of the seven-day system in western countries are mostly religious.
For example, when Christians go to church, it is called "Sunday" and seven days is called "week". In the thirty-first year of Guangxu (1905), the Qing court announced that it would stop the provincial entrance examination and the senior high school entrance examination, abolish the imperial examination system that lasted for more than 1000 years, and set up a "department". Yuan Jiagu was immediately ordered to transfer to the department to prepare for the compilation of a bookstore, and later served as the first director of the bookstore.
The Compilation and Library Bureau has two courses: book editing and book translation. Its task is to study and compile various official textbooks for the purpose of unifying the whole country.
How to deal with a "new term" will naturally be encountered in the compilation of various teaching materials.
1909, the editor and the book bureau set up a new organization to standardize the terminology in textbooks.
Yuan Jiagu personally participated in the work of this museum and presided over the formulation of many unified names.
Making the seven-day work into China's own "week" was made under the auspices of Yuan Jiagu.
In the ancient calendar of our country, twenty-eight lodges were arranged in the order of day, month, fire, water, wood, gold and earth, and they lasted for seven days, which was called "seven lodges"; The "seven days is a week" in the western calendar coincides with China's "Qixi"; Japan's "seven waste days" are exactly the same.
But Yuan Gugu felt uncomfortable and inconvenient to use. After consulting with his colleagues, he called a week a week and called every day of the week "Sunday, Monday ... Saturday" in turn.
This is the origin of the "week" which not only conforms to the international "seven-day work week" system, but also has the characteristics of China.