Why is there only 7 days in a week? Why is the week seven days

Seven days of the week are from the Bible. The biblical book of Genesis* records God's work in creation.

In Greek mythology, Shamash was the sun god of the ancient valley of the two rivers, and he was usually regarded as the triple god of the stars along with his father the moon god Sin, and his sister Ishtar, the goddess of Venus

Sun god Shamash – Sunday, called the Sun Sun;

Moon god Xin - Monday, called the moon sun;

Martian god Nerga – Tuesday, called the fire sun;

Mercury God Nab – Wednesday, known as the Water Flare;

Jupiter god Maldok – Thursday, known as the Wood Flare;

The god of Venus, Ishtar – Friday, known as the Golden Sun;

Saturn God Ninurda – Saturday, known as the Earth Flare.

This is a question that does not need to be delved into, whether it is 7 days or 13 days.

Because 7 days is stipulated as a week.

Between 6000 BC and 4000 BC, on the plains of Mesopotamia, a group of Sumerians lived. By observing the waxing and waning of the moon, they found that it takes seven days from the semicircle to the full moon. From the full moon to the semi-full moon, it also takes seven days; It still takes seven days to disappear from the semi-circle to the moon, and from the moon to the half-moon.

From this, they discovered that the seven-day cycle is the waxing and waning cycle of the moon. Therefore, they divided the month into four weeks, and set seven days as a cycle, and named these seven days after the seven star gods of the sun (Sunday), moon (Monday), Mars (Tuesday), Mercury (Wednesday), Jupiter (Thursday), Venus (Friday), and Saturn (Saturday), which is the earliest origin of the name "week".

Brief introduction of the week:

The week, also known as the week, is a unit of time and the basis for formulating working days and rest days.

The week as a time cycle originated in Babylon at the earliest. The universal system of the week was officially established by the Roman Emperor Constantine the Great on March 7, 321 AD.

In ancient China, it was called "Qiyao". During the Xia, Shang and Zhou dynasties in China, Qiyao refers to the seven main stars such as the sun, the moon and the five planets, and was an important organizational component of astronomical stars at that time.

The seven days of the week were derived by the ancients based on the observation of the waxing and waning of the moon. Through the observation of the moon, the ancients found that from the halfcircle to the full moon, from the full moon to the semi-full moon, the time is 7 days, from the semicircle to the moon, and from the moon to the semi-full moon, which is also 7 days. So people divided the month into four weeks, and set a cycle of seven days.

The seven days of the week were derived by the ancients based on the observation of the waxing and waning of the moon. Through the observation of the moon, the ancients found that from the halfcircle to the full moon, from the full moon to the semi-full moon, the time is 7 days, from the semicircle to the moon, and from the moon to the semi-full moon, which is also 7 days. So people divided the month into four weeks, and set a cycle of seven days.

Hello, dear. The seven days of the week are derived from the Bible. The biblical book of Genesis records God's creation of the heavens and the earth.

On the first day God created light, on the second day he made air and water, on the third day he made land, sea, and all kinds of plants, on the fourth day he made the sun, moon, and stars, and set the days and nights, seasons, days, and years, on the fifth day he made all kinds of ornamental animals, on the sixth day God created man in his image, and on the seventh day the work of creation was finished, and God rested all his work, and blessed the seventh day of the hall of Shen Liang, and made it holy. This is where the tradition of a week is that there are seven days a week, with Sundays off.

Nowadays, countries around the world use a seven-day week. This system was first established by Constantine the greatest. On March 7, 321 A.D., he officially declared seven days a week, a system that is still in use today.

The English name of the seven days of the week is sunday, monday, tuesday, wednesday, thursday, friday, saturday

These names first originated in ancient BabylonIn the 7th and 6th centuries B.C.E., the Babylonians had a week system. They divide the month into 4 weeks, with 7 days per week, i.e. one week.

The ancient Babylonians built the Altar of the Seven Stars to worship the star gods. The Seven Star Altar is divided into 7 layers, each layer has a star god, from top to bottom according to this is the sun, moon, fire, water, wood, metal, earth 7 gods. 7 The gods were in charge of one day each week, so that one god was sacrificed every day, and one god was named every day

The sun god Shamash presides over Sunday, called the Solar Sun; The moon god Xin is in charge of Monday, called the Lunar Sun; Nerga, the Martian god in charge of Tuesday, called the Fire Shining Sun; Naboo, the god of Mercury, is in charge of Wednesday, calling the Water Flare; Jupiter's god Marduk, is in charge of Thursday, called the Wood Flare; The Venus god Ishtar is in charge of Friday, called the Golden Shining Sun; Ninurda, the god of Saturn, is in charge of Saturday and is called the Earth Flare.

The week system founded by the ancient Babylonians was first spread to ancient Greece, ancient Rome and other places. The ancient Romans named 1 week and 7 days after the god they believed in: sun'S-day, moon'S-Day (Moon God Day), mars'S-day, Mercury'S-day (Mercury God's Day), jupiter'S-Day (Jupiter's God's Day), Venus'-day (Venus god day), saturn'S-day (Saturn God's Day).

After this name reached Britain, the Anglo-Saxons remodeled four of them with the names of their own gods, replacing Mars with Tuesday, Wednesday, Thursday, and Friday's-day 、mercury\'s-day 、jupiter\'s-day 、venus\'Yu Tiu, the Anglo-Saxon god of war; Wednesday** in Woden, is the supreme god, also known as the main god; thursday** in thor, is the god of thunder; friday** is the goddess of love. This gives rise to the names of the 7 days of the week in today's English: Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday

The seven-day week was established by the ancient Babylonians according to the laws of the moon's orbit around the earth.

The cycle of the moon's waxing and waning is approximately days, during which the moon is not visible for about a day, and the moon can be seen for the remaining 28 days. In order to meet the needs of a short period of time, the ancients divided the 28 days of the moon into four equal parts, each of which was seven days. Archaeological excavations of ancient Babylon have revealed that the Babylonians used seven days as a time cycle 3,000 years ago.

The start time of the week is not exactly the same in different regions. Most European countries use Monday as the first day of the week, China also uses Monday as the beginning of the week, Japan uses Sunday, and Egypt starts on Saturday. But international standards have made Monday the first day of the week.

In short, the seven-day week system has penetrated into our lives and has become our basic understanding of time. Its historical background and cultural significance are thought-provoking, and it also brings a lot of convenience to modern society.

Why seven days for a week? This is a deceptively simple question with a profound historical background and cultural significance. In our daily lives, the seven-day periodicity has become deeply rooted in the hearts of the people, and has become the basic understanding of time for my shouters.

So, how did this seven-day cycle come about?

The seven-day week system is not only a way of dividing time, but also has profound cultural significance. In traditional Chinese culture, seven is an important number and is considered auspicious. In Western culture, seven is also seen as a mystical number with strong ties to religion, mythology, and legend.

In addition, the seven-day cycle is also in line with the law of the human biological clock, so it also has important application value in medicine.