Calendar Origins

The book emphasizes that calendars are cultural artifacts, reflecting a society's relationship with the cosmos and its internal organization. The book examines lunar, solar, and lunisolar calendars, illuminating the ingenious methods used to observe celestial events. For instance, the Egyptians created a solar calendar that greatly influenced their religious festivals and administration.

Beginning with foundational concepts, the book progresses to analyze calendar systems in Mesopotamia, Egypt, and Mesoamerica. It concludes by tracing the evolution from these ancient systems to the Gregorian calendar, highlighting the long journey from early observations to modern standardization of time measurement.