Why Are There Only 7 Days in a Week?

Imagine you're a farmer. You watch the sky and notice something special, there are seven visible stars, and they look like a pattern that repeats every week! People long ago started counting days based on this, so we still use seven days in our weeks today.

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Examples

A farmer sees seven stars in the sky every night, so he counts his workdays by them.
Children count days using their fingers: one finger per day, and on the seventh, they rest.
If you split a moon's cycle into four parts, each has exactly seven days.

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Categories: Math · calendar· history· math· timekeeping