I will be totally honest by saying that it was really confusing trying to figure out when the new decade would begin, but alas, I have found the answers a lot of people have been looking for.
"The decade the 2010s is about to begin on January 1, 2010. I feel this needs to be addressed in a public service announcement of sorts.
I've seen a lot of nonsense about how "the decade doesn't really end until December 31, 2010." Don't be ridiculous. The decade ends in two weeks.
A few points. A decade means 10 years. 1995-2004 is a decade. 2000-2009 is a decade. And 2001-2010 is a decade.
The bozos insisting that the decade does not end until December 31, 2010 usually base this on the observation that "there was no year 0". True, the calendar begins in 1 AD (though it was adopted some 16 centuries later). But all that the start date of the calendar means is that it would be technically incorrect to refer to 2000-2009 as "the 201st Decade". But, when we talk about "the decade" it's clear that we're not talking about ordinal decades, because nobody ever talks about ordinal decades. I cannot think of a single instance where someone referred to the 1990s as the "200th Decade." '
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Also, here is some information from our good ol' friend - Wikipedia.
