What is Hour?
An '''hour''' (abbreviation: '''h''' or '''hr''') is a [[unit of measurement]] used to measure [[time]]. An hour is equal to 60 [[minute]]s. 24 hours are equal to 1 [[day]]. Unlike the [[second]], the hour is not a base [[SI unit]]. {{commons}} {{SI units}} {{science-stub}} [[Category:Basic English 850 words]] [[Category:Units of time]]