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Naturally, one would say any given decade, such as the 490s BC, contains the years 490-499, but without a year zero, this is not the socio-mathematical defition to this decade. Rather, the so-called 0s BC, was the ten year period from year 1 BC to 10 BC, and the 10s ran from 20 BC - 11 BC. We can see from this pattern that any given decade does not contain its namesake year, perhaps challenging, at it's foundation, the very notion of the decade. Holocene Era! Xaxafrad05:49, 11 January 2007 (UTC)[reply]
