Holidays today are often established by legislation, and calendars are published on paper and smart phones. But how were holidays chosen and taught in biblical Israel? And what might these holidays have to do with the creation narrative? In this book, Michael LeFebvre considers the calendars of the Pentateuch with their basis in the heavenly lights and the land's agricultural cadences. He argues that dates were added to Old Testament narratives not as journalistic details but to teach sacred rhythms of labor and worship. LeFebvre then applies this insight to the creation week, finding that the days of creation also serve a liturgical purpose and not a scientific one. The Liturgy of Creation restores emphasis on the religious function of the creation week as a guide for Sabbath worship. Scholars, students, and church members alike will appreciate LeFebvre's careful scholarship and pastoral sensibilities.