Lately there seems to have been a bit of an outbreak of the assertion that the last decade did not end on December 31, 2009, and that it will still be with us for another year. I posted a reply on the topic on a post on Arsen Darnay's LaMarotte blog (Getting the Calendar Right) and thought I'd share it here:
A year left to still accomplish goals for this decade? Too late. There may still be a case to be made on the century score, but the Naughtful Naughts -- that kidney stone of a decade* -- are done. We identify decades by the decennial number, thus the Sixties, the Seventies, the Eighties, etc. You won't hear much argument that 1980 was part of The Seventies, even if Disco was still running strong.
Fortunately, there's a simple solution for those who feel themselves bound by two-hundred consecutive ten-counts. The first decade had just nine years, years 1 AD through 9 AD. Heresy? Hardly, in a calendar system that throws in an extra day once every four years, an occaisonal leap-second, and that once even lopped seventeen days out of the calendar altogether.
*They were painful, and we're glad they've passed.