|February 15, 2011 Sunrise 6:56 am|
"Ancient man has left us very little about the details of his timekeeping, but whatever we have found seems to indicate that in every culture, some people were preoccupied with measuring and recording the passage of time. Ice-age hunters in Europe over 20,000 years ago scratched lines and gouged holes in sticks and bones, possibly counting the days between phases of the moon. Five thousand years ago, Sumerians in the Tigris-Euphrates valley in today's Iraq had a calendar that divided the year into 30-day months, divided the day into 12 periods (each corresponding to 2 of our hours), and divided these periods into 30 parts (each like 4 of our minutes). We have no written records of Stonehenge but its alignments show its purposes apparently included the determination of seasonal or celestial events such as solstices and may have included lunar eclipses."
Horology (from Greek: ὥρα, "hour, time" and Greek: λόγος, logos, "study, speech"; lit. the study of time) is the art or science of measuring time. Clocks, watches, clockwork, sundials, clepsydras, timers, time recorders and marine chronometers are all examples of instruments used to measure time.
People interested in horology are called horologists. Go figure.