As well as a precise unit of time and a synonym for “time of day” (e.g. “at a late hour”), hour can also be used figuratively to denote a particular time (e.g. “witching hour”), a momentous or fateful event (“hour of victory,” “hour of need”), or a vague period of time [2]. The modern definition as a twenty-fourth part of a day became established during the early modern period. A distinction is made between hours of equal length (Latin horae aequinoctiales, “equinoctial hou…