Marking Time: The Epic Quest to Invent the Perfect Calendar

Calendar: Humanity's Epic Struggle to Determine a True and Accurate Year

Empires of Time: Calendars, Clocks, and Cultures, Revised Edition (Mesoamerican Worlds)

Mapping Time: The Calendar and Its History

The History of Time: A Very Short Introduction

The Oxford Companion to the Year: An Exploration of Calendar Customs and Time-Reckoning

Revolution in Time: Clocks and the Making of the Modern World, Revised and Enlarged Edition

Time's Pendulum: From Sundials to Atomic Clocks, the Fascinating History of Timekeeping and How Our Discoveries Changed the World

In Search of Time: The History, Physics, and Philosophy of Time