Technically the 20th century began on January 1st, 1901, since there was no year 0 in our calendar (1 BC was followed by 1 AD). But that being said, I'd assume most people in their own minds round down to the zero. If I owned an item from the year 1900, I'd personally think of it as a 20th century piece.
Last edited by Anthony S.; 11-10-2009 at 11:29 AM.
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