Ancient Origins of Time Tracking
Time tracking has its roots in ancient civilizations, where the Egyptians and Babylonians first observed celestial bodies to measure time. Around 1500 BCE, Egyptians used sundials to divide the sunlit day into 10 parts, along with two twilight hours, marking some of the earliest forms of structured timekeeping. Similarly, water clocks, or clepsydra, were developed by Egyptians and Greeks to measure time indoors and at night. The Babylonians' use of a sexagesimal (base-60) system laid the foundation for the modern 60-second minute and 60-minute hour, a structure that remains crucial today.
By 600 BCE, Egyptians had developed the merkhet, an astronomical tool used to establish a north-south line and mark nighttime hours. These innovations were foundational, providing the groundwork for more sophisticated timekeeping devices. In China, incense clocks were utilized by the 6th century CE, showcasing the diverse cultural approaches to time tracking. The earliest known payroll record, detailing beer rations to workers, dates back to 3100-3000 BCE, highlighting the early relationship between time tracking and labor management.