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Why does the week have 7 days? – Enlightenment

Why is the week 7 Days? - Clarification

Just as a day has 24 hours, a week has 7 days. In the following we want to find out whether this has always been the case and how the 7-day week came about.

In fact, the week is not a common unit of time in all cultures. In most cases, however, it is, and that is a unit of time of 7 days. However, it is not a legal unit or a physical unit of measurement in most countries. And yet, according to the German Civil Code, for example, it is permitted to specify deadlines in weeks.

Origin of the 7-day week

A month consists of around 28 days. Or to put it another way: 28 days is the length of a month (moon). An obvious solution was to divide the 28 days into 4 phases of the moon: new moon, waxing crescent, full moon and waning crescent.

In ancient times, 7 moving celestial bodies were known: the sun, moon, Mars, Mercury, Jupiter, Venus and Saturn . Back then, people watched the celestial bodies and found that they were moving. Wanderer means planet in Greek.

Nevertheless, the names of the days of the week come from different cultures and usually refer to one of the seven planets or the respective planetary god who watches over this day. For example in Babylonia and Egypt, there a deity as well as a celestial body was assigned to the 7 days. Also, in the Babylonian language, sa-ba-tu was the meaning of the 7th day after Neulicht.

In the earliest Bible tradition (5th century BC) there is talk of a 7-day week, there the first 6 days are each given a number, the seventh day is called the day of rest.
Attested only much later is the term Sabbath for the day of rest.

Since when does the 7-day week exist?

To this day it is unclear where exactly the designations originated, it is only clear that the number 7 can always be heard all over the world, and that from very early times when it came to the number of days in a week . And so we still don't know when and where the usual time counting, which we still use today, was first established.
Under oriental influence, the ancient Roman nundinum was replaced by our current 7-day week.
Legally, the binding 7-day week can only be established from 321 AD with Emperor Constantine in the legislation on freedom of court and freedom of work.

Since its introduction, there is no evidence that it has since been replaced by anything else, which is why it is the most regular part of the Gregorian and Julian calendars.

Names of the individual days of the week

Monday< /strong>: The day of the moon
Tuesday: The English term for Tuesday is Tuesday. Mars (the Roman god of war) was called “Tiu” by the Germans. And that's how Tuesday came about from “Tag des Tius”.
Wednesday: In Italian, Wednesday is called Mercoledi, this designation is reminiscent of the planet Mercury.
Thursday: About Thursday is watched over by the Germanic god of thunder (Donar), who stands for the planetary god Jupiter.
Friday: Translated into Italian, Friday means Venerdi, which is reminiscent of the planet Venus. In German, Friday was named after Freya, the Germanic goddess.
Saturday: This developed from the Jewish holiday Sabbath. In addition, the English term for Saturday (Saturday) suggests Saturn.
Sunday: The day of the sun

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