WONDER #1666: Why Are There Seven Days in a Week?

Question 1 of 3

Historians believe the seven-day week dates back to which ancient civilization?

  1. Greek
  2. Roman
  3. Babylonian
  4. American

Question 2 of 3

Roman Emperor Constantine formally adopted the seven-day week in what year?

  1. 321
  2. 550
  3. 775
  4. 1492

Question 3 of 3

Which of the following was NOT one of the seven heavenly bodies revered by the Babylonians?

  1. Sun
  2. Moon
  3. Mars
  4. Pluto

Check your answers online at https://www.wonderopolis.org/wonder/why-are-there-seven-days-in-a-week.