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

Why a week is 7 days.

"7" is a magic number, a very important number. Why do humans use this number as the cycle of time?

Why not "10", not "12". It makes sense to have a week of 10 days or a week of 12 days, and 10 is fingered.

The total number, 12 is the number of months in a year, and human beings do not set them as the days of the week, which has to be understood by ancient humans.

Talk about it. Because ancient humans did not understand the rate system, it was very difficult for them to understand numbers, and each natural number had to have a pronunciation and a language.

Ancient humans, who are not very rich in words, obviously could not do it. As a result, they can only recognize smaller natural numbers.

In ancient times, human beings were very mysterious about the ebb and flow of the tide and the cloudiness of the moon. The tide rises and goes, and the moon is full and the moon is missing, which is very regular. Opposite.

Tide: from the midline position to the highest tide position, the time is 7 days; From the highest position of the tide to the midline position, time.

Also 7 days. For low tide: from the midline position to the lowest tide position, the time is 7 days; Rise back from the lowest position of the tide.

In the midline position, the time is also 7 days. 7 days is the time period when the tide rises and falls.

For the Moon: from the semicircle to the full moon, the duration is 7 days; From the full moon to the semi-full moon, the time is another 7 days. From semicircle to dissipation.

lost, the time is 7 days; From the vanishing to the half-moon, it is another 7 days. The 7-day cycle is also the waxing and waning cycle of the Moon.

The ancients did not understand that the tides were caused by the moon, but they discovered the pattern and connection between the two. The tide rises and falls, and the moon is full and the moon is lacking.

It is synchronized, all four 7 days. Since the decimal system was not used, the ancients did not have the number 28, so they chose 7.

numbers. Since the observation of the moon is the observation of celestial phenomena, which is the same as the observation of the sun and the stars, it is called the week, and the period is the cycle.

meaning. The Chinese pronunciation of 7 is the same as start, go, period, and song, indicating the meaning of going back and forth, that is, cycle. 7 is in the celestial phenomena.

The cycle of the waxing and waning of the moon and the rise and fall of the tide corresponds to the number of days, while 10 only corresponds to the finger, not a celestial phenomenon, and cannot be ancient.

people understand and accept; 12 is not a cycle, there is a larger mantissa behind 12, in addition, 12 exceeds 10, in no.

Before the rate of advancement, ancient humans could not express it.

In my opinion, people should first invent the seven-day week-long timekeeping method, and then come up with the so-called God to explain it.

In ancient times, there were seven celestial bodies that people were more familiar with: Venus, Jupiter, Mercury, Mars, Saturn, (these are the familiar five elements) the sun and the moon. These seven things are called Qiyao in our China, of course, we don't use the week method, but these seven celestial bodies are also familiar to foreigners, so they take seven days as a week.

I found it from **. Dizzy. So much.

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.

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

The earliest seven-day weekly cycle was indeed set according to the laws of the celestial bodies.

Definitely. The Sumerians of the ancient valley of the two rivers had astronomical observatories and calendars in the second or third millennium BC, and their cultural achievements were inherited by the Akkadians, who founded the kingdom of Babylon. This calendar is similar to the Chinese lunar calendar, which is divided according to the lunar cycle.

A month has about 28 to 29 days, which are divided into four seven-day cycles according to the phases of the moon: seven days from the new moon to the half moon, seven days from the half moon to the full moon, full moon to half moon, half moon to new moon, and so on.

However, there is a problem with this calendar: each quarter of the moon's phases is slightly longer than seven days, so every few months a few days have to be added or subtracted from the last week to coincide with the first day of the next month and the new moon. Although this kind of week may seem troublesome, the Sumerians and Akkadians considered "seven" to be a sacred number, so they happily continued to use it for 2,000 years.

Although it also happens to be seven days, the Babylonian week that coincides with the phases of the moon is clearly a far cry from the continuous, fixed day of the week that we commonly use today. Appear. The earliest seven-day week cycle was indeed set according to the laws of the celestial bodies.

The Sumerians of the ancient valley of the two rivers had astronomical observatories and calendars in the second or third millennium BC, and their cultural achievements were inherited by the Akkadians, who founded the kingdom of Babylon. This calendar is similar to the Chinese lunar calendar, which is divided according to the lunar cycle. A month has about 28 to 29 days, which are divided into four seven-day cycles according to the phases of the moon

Seven days from the new moon to the half-moon, seven days from the half-moon to the full moon, a full moon to the half-moon, a half-moon to the new moon, and so on.

However, there is a problem with this calendar: each quarter of the moon's phases is slightly longer than seven days, so every few months a few days have to be added or subtracted from the last week to coincide with the first day of the next month and the new moon. Although this kind of week may seem troublesome, the Sumerians and Akkadians considered "seven" to be a sacred number, so they happily continued to use it for 2,000 years.

Although it also happens to be seven days, the Babylonian week that coincides with the phases of the moon is clearly a far cry from the continuous, fixed day of the week that we commonly use today. The present seven-day week should be traced back to Jewish tradition. According to the book of Genesis, on the seventh day of creation, God rested with satisfaction while looking at the finished world.

The Jewish people, who attached great importance to their religious traditions, established a Shabbat (Sabbat) every seven days.

According to their calculations, each day begins at sunset, so that from the seventh sunset to the next, no work is allowed, and the family is to be accompanied by dinner and prayer. The root word shabat (sh-v-t) does not mean "rest" but "to stop working", and on this day, labor is seen as a sign of blasphemy. The remaining six days are called "the first day after the Sabbath" and "the second day" in Hebrew.

This kind of week does not depend on celestial phenomena and is supposed to be the ancestor of the modern week. Of course, no one knows where the first seven days of the Jews began, and the current Jewish Sabbath falls on every Saturday of the Gregorian week, so that the weekend in Israel falls on Friday and Saturday.