Waiting for the weekend often seems unbearable, six full days between Saturdays. There are 7 days a week for a long time, so people don't stop often and ask why. Most of our calculations are due to the motion of planets, moons, and stars. Our day is equivalent to one complete revolution of the earth around its axis. This year, the earth revolves around the sun, requiring 365 1\/4 days, so we add one day in February every four years as a leap year. But Zhou and Yue are a bit complicated. The phases of the moon are not exactly the same as those of the solar calendar. The lunar cycle is 27 days and 7 hours, and each solar year has 13 lunar phases. Some of the early civilizations observed the universe and recorded the movements of the planets, the sun, and the moon. The Babylonians living in modern Iraq are astute observers and interpreters of the sky. We have seven days a week, thanks in large part to them. The reason they use the number seven is that they observe seven celestial bodies: the sun, moon, Mercury, Venus, Mars, Jupiter, and Saturn. Therefore, this number has a special meaning to them. Other civilizations have chosen other numbers, such as the Egyptians, whose week lasts ten days; or the Romans, whose week lasts eight weeks. The Babylonians divide their lunar month into seven days a week, and the last day of the week has a special religious significance. A 28-day month, or full moon cycle, is a bit too long for effective processing, so the Babylonians divided their month into four equal seven parts. The number 7 is not suitable to coincide with the solar year or even the month, so it causes some inconsistencies. However, the Babylonians were dominant in the Near East, especially in the 6th and 7th centuries BC. C., so much so that this and many of his other notions of time, such as 60 minutes per hour, still exist. The seven-day week covered the Near East. It was adopted by Jews, who were captives of the Babylonians during the height of Babylonian civilization. Other surrounding cultures also joined the seventh week, including the Persian Empire and the Greeks. Centuries later, when Alexander the Great began to spread Greek culture from the entire Near East to India, the concept of 7 days a week also spread. Scholars believe that perhaps India later introduced the seven-day system in China. Finally, once the Romans began to conquer the territories affected by Alexander the Great, they finally switched to the seven-day system. In 321 AD, Constantine the Great designated the 7-day week as the official Roman week and Sunday as a public holiday. It was not until the 20th century that the modern era adopted the weekend. Although there have been some recent attempts to change the 7-day-a-week system, it has been around for a long time, and it seems that it still exists.
0 Comments