An interesting question young people ask is why there are seven days in a week and why we have a weekend. The Bible gave humans a seven-day week, and that framework works very well. Genesis 2:2 tells us that on the seventh day God rested from the creation of the cosmos, and Exodus 20:11 repeats that assertion.
Skeptics have said this was copied from the Babylonians, since ancient Babylonian astronomers could see seven astronomical bodies – Sun, Moon, Mercury, Venus, Mars, Jupiter, and Saturn. But the Babylonians had a five-day week, and Babylonian contracts from Mari (Tell el-Hariri) show there was no day of rest or Sabbath, as work was carried on continuously. Other cultures had systems based on different numbers of days, such as the Egyptian ten-day week and the Roman eight-day week.
Attempts to replace the seven-day week with an astronomical system have failed. A day is the time for one rotation of the Earth on its axis, and a year is the time it takes for the Earth to make one revolution around the Sun. The problem is that it takes 365 and ¼ days to make one revolution, so we have to add an extra day in February every four years (for a leap year).
The seven-day week is a creation of God. It is seen in every part of human activity, including mental health and bodily functions. Every other system humans have tried has been unsuccessful. God created man in a way that allows us to live longer than any other mammal. The weekend reminds us of our unique existence, and the Sabbath in ancient times and the Lord’s Day in the Christian era reinforce our faith if we will allow them to.
— John N. Clayton © 2026
References: USA Today and Wikipedia.