Weeks don’t make sense:

A duration of seven days doesn’t align with any natural cycles or fit cleanly into months or years. And though the week has been deeply significant to Jews, Christians, and Muslims for centuries, people in many parts of the world happily made do without it, or any other cycles of a similar length, until roughly 150 years ago …

[my] hypothesis, which I’m a little more drawn to because I’m a historian: that our sense of what is an appropriate amount of time to wait between activities has been conditioned by the week.