The Time Book: A Brief History from Lunar Calendars to Atomic Clocks

The Time Book examines the history of timekeeping from the first primitive calendars and clocks to the standardized, atomic methods of today. Early humans created sundials, water clocks, and lunar calendars in order to divide, measure, and make sense of the passing of time. Political and religious agendas influenced the eventual development of the Gregorian calendar that is widely used today. Readers learn why we have leap years, where August got its name, and why time isn't measured in "neat, round numbers." Index. Mixed-media collages.