The Ordered Day. Quotidian Time and Forms of Life in Ancient Rome by James Ker. Johns Hopkins University Press (March 21, 2023). ISBN-10 1421445174. ISBN-13 978-1421445175.

Traces how the day has served as a key organizing concept in Roman culture—and beyond. How did ancient Romans keep track of time? What constituted a day in ancient Rome was not the same twenty-four hours we know today. In The Ordered Day, James Ker traces how the day served as a key organizing concept, both in antiquity and in modern receptions of ancient Rome. Romans used the story of how the day emerged as a unit of sociocultural time to give order to their own civic and imperial history. Ancient literary descriptions of people's daily routines articulated distinctive forms of life within the social order. And in the imperial period and beyond, outsiders—such as early Christians in their monastic rules and modern antiquarians in books on daily life—ordered their knowledge of Roman life through reworking the day as a heuristic framework.