Chronometry (from Greek χρόνος "time" and μέτρηση "measurement") is the science of the measurement of time, or timekeeping.
It should not to be confused with chronology, the science of locating events in time, which often relies upon it.
Time · Eternity · Arguments for eternity · Immortality
Chronometry · UTC · UT · TAI · Second · Minute · Hour · Sidereal time · Solar time · Time zone Clock · Horology · History of timekeeping devices · Astrarium · Marine chronometer · Sundial · Water clock
Calendar · Day · Week · Month · Year · Tropical year · Julian · Gregorian · Islamic
Astronomical chronology · Geologic Time · Geological history · Geochronology · Archaeological dating
Causality · Eternalism · Eternal return · Event · The Unreality of Time · A-series and B-series · B-Theory of time
Time in physics · Spacetime · Absolute time and space · T-symmetry Arrow of time · Chronon · Fourth dimension · Planck epoch · Planck time · Time domain