守時

thumb|upright=0.65|The hourglass is often used as a symbol representing the passage of time. thumb|Clocks; a watch-maker seated at his workbench Chronometry or horology () is the science studying the measurement of time and timekeeping. Chronometry enables the establishment of standard measurements of time, which have applications in a broad range of social and scientific areas. Horology usually refers specifically to the study of mechanical timekeeping devices, while chronometry is broader in scope, also including biological behaviours with respect to time (biochronometry), as well as the dat