Question

why do we need 7 days in a week​

Answer 1

Answer:

The Babylonians, who lived in modern-day Iraq, were astute observers and interpreters of the heavens, and it is largely thanks to them that our weeks are seven days long. The reason they adopted the number seven was that they observed seven celestial bodies — the sun, the moon, Mercury, Venus, Mars, Jupiter and Satur

Explanation:

this did in week