Stuff You Should Know

Keeping Time

January 20, 2026

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  • Early timekeeping, starting with the gnomon (a stick in the ground), was primarily focused on tracking seasons and the sun's movement rather than precise hourly appointments. 
  • Ancient timekeeping devices like the shadow clock and early sundials, including the Greek hemicycle, utilized the sun's shadow and accounted for seasonal variations in daylight hours. 
  • The development of timekeeping progressed from solar observation to water clocks, incense clocks, mechanical weight-driven clocks (using the verge and foliot mechanism), and eventually pendulum clocks, marking a shift from natural rhythms to imposed, uniform time. 

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