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A day (symbol: d) is a unit of time equivalent to 24 hours. It is not an SI unit but it is accepted for use with SI.[1] The term comes from the Old English dæg. The word is also used to mean daytime, the period of daylight experienced once per day and alternating with night.
Last update: 2008-05-05 07:29:12 Day | Copyright 2008 HubHip.com>