calimac

Well, my mindset - and those of most people who take my view - is that a decade can be any span of ten years you want it to be, but since we're using it to sum up things like popular culture and not to perform precise arithmetical calculations, it's obtuse not to notice that the odometer turning version (0-9) is the popular choice. Nor are they calling it "the first decade of the century" (in any case a century also can be 00-99), but nineties/oughties or naughties/teens.

It's the other side which, locked into an irrelevant rigid adherence to theoretical mathematics, insists that a decade can only be 1-0.