DESC: Calendars in the Dead Sea Scrolls explores the evidence about the different uses of time-measurement in the Dead Sea Scrolls, the Hebrew Bible and other ancient Jewish texts. James C. VanderKam examines the pertinent texts, their sources and the different uses to which people put calendrical information in the Christian world. He argues that the scrolls indicate that a dispute about the correct calendar for dating festivals was one of the principal reasons for the separation of the authors of the scrolls from Jewish society.