Pedants will of course point out that the new decade doesn't start until 2011.
I'm sure we've had this debate before, but basically its based on AD meaning "of our Lord" (it means this whether you're a Christian or not) and therefore year numbers are ordinal numbers, of which the first number is "first" and not "zeroth". Therefore the first decade AD began in the year 1 and ended at the end of year 10 and the second decade went 11-20 etc. Therefore the third millennium goes 2001-3000 and this decade runs 2001-2010.
Starting in year one and not year zero makes logical sense if the bc/ad system was made by people who lived at this time, although if my memory has not failed me, this year system came into use somewhere in the realm of 500 years later. (Referring, of course, to the time I heard/read this fact. I was not there 1500 years ago
Also, if you follow the pattern from the back (i.e. counting up
through the BC's)then this would be 0 BC, 0 years before Christ, making the next year 'year one'.
Furthermore, AFAIK, the majority of historians agree that the actual birth of Christ was at least a few years out of kilter with the system, so being pedantic here is hypocritical because the figure is only approximate anyway.
For this reason, I choose to celebrate the new decade on the 'zeroth', and also because this is the most climatic year, for you get to see the number in the tens column roll over,
or as we saw last decade, the hundreds.
So, AGS Community; Happy New Decade!