why all the world use 7 days a week?

Answer 1

The day is defined by the rotation of the earth on its axis.

The month is defined by the circuit of the moon around the earth.

The year is defined by the circuit of the earth around the sun.

But there is no natural phenomenom that defines a week, contrary to the attempt to provide one in an above answer.

The week, seven days, is strictly an arbitrary measurement of time, and the only place where it is defined is in the Bible, in Genesis 1.

There have also been studies that show the human body has a natural daily cycle, which can be explained by the light/dark of a day, a monthly cycle, which could probably be explained away by the circuit of the moon, and very possibly a yearly cycle, which again could be explained away by the circuit of the earth to the sun.

However, there is also evidence that the body has a weekly cycle,and that was one of the reasons why the ten-day week attempted at the time of the French Revolution did not work--they body could not be made to adjust to a ten-day week. However, that cycle can NOT be explained as a result of some natural event, as there is none. God made us that way, with an internal "weekly" clock that needed rest on a weekly basis.

Lawrence
http://www.truebiblesermons.com

Answer 2

Except the Beatles!

Ooh I need your love babe,
Guess you know it's true.
Hope you need my love babe,
Just like I need you.
Hold me, love me, hold me, love me.
Ain't got nothin' but love babe,
Eight days a week.
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http://webexhibits.org/calendars/week.html might help a little.

The explanation I thought the most convincing was that the seven-day week may have been chosen because its length approximates one moon phase (one quarter = 29.53 days / 4 = 7.3825 days).

Do Weeks of Different Lengths Exist?

If you define a "week" as a 7-day period, obviously the answer is no. But if you define a "week" as a named interval that is greater than a day and smaller than a month, the answer is yes.

The ancient Egyptians used a 10-day "week", as did the French Revolutionary calendar (see French calendar).

The Maya calendar uses a 13 and a 20-day "week" (see Mayan calendar).

The Soviet Union used both a 5-day and a 6-day week. In 1929-30 the USSR gradually introduced a 5-day week. Every worker had one day off every week, but there was no fixed day of rest. On 1 September 1931 this was replaced by a 6-day week with a fixed day of rest, falling on the 6th, 12th, 18th, 24th, and 30th day of each month (1 March was used instead of the 30th day of February, and the last day of months with 31 days was considered an extra working day outside the normal 6-day week cycle). A return to the normal 7-day week was decreed on 26 June 1940.

Lithuanians used week of nine days before adopting Cristianity.

Answer 3

And why does the whole world breath in fresh air? Because that is the way things are meant to be. God is not going to make one country or continent have 4 days a week and the others seven days.

Answer 4

Because God made Earth in 7 days and many people all over the world believe in , and it was like that for million of years.

Answer 5

Human timekeeping is bigoted, it's only a comfort. The day is continuously establishing (dawn) or finishing (sundown) someplace on the earth; that is why the moon appears orange throughout a lunar eclipse rather of wholly black. The sunrises and sunsets of the complete earth are constantly refracting mild in one more course than a instantly line course from the solar.

Answer 6

Origin of the seven-day week

Weekday heptagram used for the planets or the days of the weekThe seven-day week became established in both the West and East according to different paths:

Babylonian, Hindu, and Jewish seven-day week
Hindu civilization is known to have had the concept of seven-day week with instances in the Ramayana, a sacred epic written in Sanskrit about 300 BC, in which there is a mention of Bhanu-vaar meaning Sunday, Soma-vaar meaning Moon-day and so forth.
The ancient Babylonians are known to have observed a seven-day week; each day dedicated to a different deity. The significance of seven comes from Babylonian astronomy. There are the seven heavenly bodies or luminaries normally visible to the naked eye (the Sun, Moon, and 5 visible planets), and they associated each with a deity.
Other theories speculate that the fixed seven-day period is a simplification of quarter a lunar month.

Chinese seven-day week
The Chinese use of the seven day week (and thus Korean, Japanese, Tibetan, and Vietnamese use) traces back to Babylonian calendar imported by Jesuit in the 16th century. Thus the 19th century Japanese, when encountering Europeans for the first time, were surprised to find their own names for the days of the week corresponded to the English names (and in fact were better preservations of the original Babylonian concepts, the English day names having been conflated with heros from Norse mythology). By contrast, the Japanese names refer to the Chinese Sun, Moon, and the five planets. The only difference is that the planets in the Japanese week have Chinese names based on the 'Five Elements' (not including Sun and Moon) rather than pagan gods.[2]

Later use of the week
Various groups of citizens of the Roman Empire adopted the week, especially those who had spent time in the eastern parts of the empire, such as Egypt, where the 7-day week was in use. Contemporaneously, Christians, following the biblical instruction, spread the week's use along with their religion.

As the early Christians evolved from being Jewish to being a distinct group, various groups evolved from celebrating both the Jewish Sabbath (Saturday) and the first day or the Lord's Day (Sunday), to celebrating only Sunday. See: Sabbath (Christian); Shabbat (Jewish).

In A.D. 321. the Roman Emperor Constantine regulated the use of the week due to a problem of the myriad uses of various days for religious observance, and established Sunday as the day for religious observance and rest for all groups, not just those Christians and others who were already observing Sunday.

The Jews of the 4th century retained their tradition of Saturday observance, by then 800 to 1700 years old, and continue to do so. Later, after the establishment of Islam, Friday became that religion's day of observance.

The seven-day week soon became a practice among Christians, Jews, and Muslims. Following European colonization and the subsequent rise of global corporate business, the seven-day week has become universal in keeping time, even in cultures that did not practise it before. Because of the two-day weekend, some modern calendars end the week on Sunday and begin it on Monday. The international standard ISO 8601 also defines Monday as the first day of the week. In practice, this means that calendar formats disagree, and that "next week" said on Sunday means "the week beginning tomorrow".

In that international standard, the "first week of the year" is that week which includes the first Thursday of the year. This way the first week of the year does not start with a long weekend (Friday to Sunday), as the New Year's Day itself is a holiday in many countries.

Days of the week
In English the days of the week are:

Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Saturday and Sunday are commonly called the weekend and are days of rest and recreation in most western cultures. The other five days are then known as weekdays. Friday and Saturday are days of rest in Muslim and Jewish countries respectively. The biblical Sabbath lasts from Friday sunset to Saturday sunset.

However, the three monotheist religions are in concordance to consider commonly Sunday as the first day of the week. ISO and European norms prescribe presently Monday.

Answer 7

because it takes 7 to make a week.

Answer 8

I believe it is due to the Bible speaking of God creating everything in 6 days and resting on the 7th day. We go by a Julian Calendar.

Answer 9

because God made there be 7 days in a week for everyone!

Answer 10

tradition

the French tried to create a 10 day week when they standardized the metric system but it simply did not cache on.