For example: 20 18 March 1 is Thursday, and the day of the week is calculated as follows:
The difference is 2 14 days, 2 14 ÷ 7 = 30 ... four.
Thursday +4-7= Monday.
Calculate 20 18 10 1 This day is Monday.
Extended data:
Now the basis for working days and rest days has been formulated.
Zhou originated in Babylon as a time period. The current worldwide week system was formally established by the Roman emperor Constantine the Great on March 7th, 32 1 year.
China called it Seven Obsidian in ancient times. During the Xia, Shang and Zhou Dynasties in China, Seven Obsidian refers to seven main stars, such as the sun, the moon and the five major planets, which is an important part of astronomical astrology at that time, but it does not mean the time period. Later, one week was borrowed as a unit of seven days, so it was called a week.
Zhou is called the Seven Obsidian in China. During the Xia, Shang and Zhou Dynasties in China, Seven Obsidian refers to the seven main stars, such as the sun, the moon and the five planets, which was an important part of astronomical astrology at that time. China's seven obsidians did not begin as a unit of time.
In the west, the ancient Babylonians first used seven days as a week. Later, the Jews spread it to ancient Egypt and from ancient Egypt to Rome. After the 3rd century AD, it spread widely to European countries. Both Islam and Christianity have weekly religious worship activities, so in many dialects, "worship" gradually has the meaning of "week".
Seven obsidians used in ancient China tied for Latin Week,
In Latin, Sunday is called "Sun Day".
(dies solis)；
Monday is called "Death Month";
Tuesday is "Mars Day".
(dies Martis)；
Wednesday (Shuiyao Day) is Mercury Day (Death
mercurii)；
Thursday (Obsidian Day) is "Dies Jovis";
Friday (Jin Yaori) is a "taboo day";
Saturday is called "Death Saturn";
French directly adopts Latin names, but changes Sunday to "Sunday"; Because the names of the five planets are the names of gods in ancient Roman mythology.
English has turned several of them into gods in ancient Germanic mythology and Nordic mythology. For example, Tuesday became Tyre in Valkyrie, Friday became Frigga, Wednesday became Walden (corresponding to Odin in Nordic mythology), and Thursday was also the name of Sol, a Nordic god. In Russian and Slavic, it has become "the first day" and "the second day".
Baidu encyclopedia-Zhou