Why does a week have seven days?
My curiosity is over the origin of the seven-day week. Understandably days, years, and months are marked by astronomical events. Days are measured by sunset to sunset, or dawn to dawn. Years are derived from the annual cycle of the sun. Months are derived from the 29 &1/2 day cycle of the moon, simplified via reduction to a unified 28 days per month, plus addition of leap years to periodically accommodate the growing overage of days. The seven-day week doesn’t apparently have an astronomical connection. Historically, scholars have considered the week to be a Hebrew invention, derived from its creation story. [Irv Jacobs, MD]
Why does a week have seven days? Read More »
Irv Jacobs, MD, Jewish Religion









