This Sunday School lesson examines the length of the creation days in Genesis 1:1–2:3. It presents and defends the historic Reformed Baptist understanding that God created the world in six ordinary, consecutive 24-hour days, followed by a seventh day of rest. The lesson considers the contextual evidence for this interpretation, including the numbered days, the repeated "evening and morning" formula, the narrative character of Genesis 1, the appointment of the sun and moon to mark days, the creation-week pattern in Exodus 20 and 31, and testimony from early Christian writers. It then introduces three alternative interpretations—the day-age view, the analogical-day view, and the framework hypothesis—and offers a friendly critique of each, particularly their treatment of the biblical text and the relationship between Genesis 1 and Exodus 20. The lesson concludes that the ordinary-day interpretation best accounts for the language, structure, chronology, and canonical context of Genesis 1.