why there are only 7 days to a week. Who made it so. Why not 10 days?

Question

Why no one thought of changing the number of hours per day as 10 and number of seconds per minit as 10 and 10 minits make an hour. 10 days make a week?

Answer 1

The concept of having things in multiples of ten has been made popular by the metric system-- which is recent.

Our calender is the gregorian calender which was developed by the romans over two thousand years ago.

One of the reasons our calender hasn't changed is because old habits die hard. There would need to be a good reason to change. If not, we tend to stick to the way we've always done things.

Answer 2

Digging into the history of the 7-day week is a very complicated matter. Authorities have very different opinions about the history of the week, and they frequently present their speculations as if they were indisputable facts. The only thing we seem to know for certain about the origin of the 7-day week is that we know nothing for certain.

The common explanation is that the seven-day week was established as imperial calendar in the late Roman empire and furthered by the Christian church for historical reasons. The British Empire used the seven-day week and spread it worldwide. Today the seven-day week is enforced by global business and media schedules, especially television and banking.

The first pages of the Bible explain how God created the world in six days and rested on the seventh. This seventh day became the Jewish day of rest, the sabbath, Saturday.

Extra-biblical locations sometimes mentioned as the birthplace of the 7-day week include: Babylon, Persia, and several others. The week was known in Rome before the advent of Christianity.

There are practical geometrical theories as well. For example, if you wrap a rubber band around 7 soda cans (or any other convenient circular objects). You get a perfect hexagon with the 7th can in the middle. It is the only stable configuration of wrapping more than 3 circular objects. Four, 5, and 6 objects will slip from one configuration to another. Ancients wrapping tent poles, small logs for firewood, or other ciruclar objects might have come upon this number and attach a mystical significance to it.

One viable theory correlates the seven day week to the seven (astrological) "planets" known to the ancients: Sun, Moon, Mars, Mercury, Jupiter, Venus, and Saturn. The number seven does not seem an obvious choice to match lunar or solar periods, however. A solar year could be more evenly divided into weeks of 5 days, and the moon phases five-day and six-day weeks make a better short term fit (6 times 5 is 30) to the lunar (synodic) month (of about 29.53 days) than the current week (4 times 7 is 28). The seven-day week may have been chosen because its length approximates one moon phase (one quarter = 29.53 / 4 = 7.3825).

Answer 3

Seven was considered to be a special number. The Bible gives us 7 days. The early calendars were tied to the phases of the moon- a full cycle being 29 1/2 days, a quarter cycle being 7 1/3 days. There are 7 holes in the human head (usually). This last bit of errata was used as an argument against the existence of the planet Neptune (no kidding).

Answer 4

During the French Revolution, they were trying to set everything to tens, because it would be easy mathematically. So there were ten days in a week. But the people were so worn down by overwork that it began to fall apart in no time.

Answer 5

6 days to create the universe and 1 day to rest

Answer 6

Darn those Babylonians. Gave us 60/60/24 time, too.

Answer 7

It does not take ten days to make a universe!

Answer 8

eyeing to work for 7.14 days continuously??

Answer 9

God.