Example image of eyePlorer eyePlorer map for 'Hour': Time International System of Units Non-SI units accepted for use with SI Minute Second Units of measurement Day Earth Coordinated Universal Time Leap second Time standard Middle English Old French Anglo-French Old English Old High German Tide Proto-Indo-European language Year Duodecimal Phalanx bones Decan Heliacal rising Earth's atmosphere Latitude Refraction Greece Clock Prague Astronomical Clock Solar time Astrolabe Astronomical clock Halakha Angelus Italy Bohemia Poland St Mark's Clock Maghrib 12-hour clock Equation of time Equinox 24-hour clock Julian day Sundial British Museum 1 E3 s 1 E5 s Church bell Egos and Icons