I did not save this article and I do not remember what that article stated as the actual length of a calender day was...so I went snooping the net and found that information. The paragraph below is from that snoop/search session.
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The actual length of a day is .23 hours, 56 minutes and 4.09 seconds It's called a "sidereal day", based on the Earth's rotation
on June 29, 2011, 9:16 am, in reply to "