In 2010. To prove it, look at the eighties: 1980-1989. So the second decade of the twenty-first century is from 2010-2019.
Just perhaps: era, epoch, eon but those are less numerically inclined
10 years is called a decade hence it is only a decade not decade of years
one decade is 10 years, one decade is 3650 days
A decade is 10 years. Since there are 12 months in a year, a decade will have 120 months.
The Next Decade was created on 2009-08-11.
The Next Decade - book - was created in 2010.
the fourth decade. 1947
1990s.
The ISBN of The Next Decade - book - is 0-385-53294-6.
Pornography. You thought it was going to change from this decade?
Early 1970's
I expect that there will still be arson investigators in the next decade. I see no reason to think that this is the last decade in human history in which anyone is going to commit an act of arson.
EARTH DAY WAS STARTED IN THE 1960S
On the 1st of January 2011.
The new decade will start on January 1st, 2011!There was no year 0 (our calendar went from 1 BC to 1 AD with no 0 inbetween). So the first decade started with the year 1, the second decade with the year 11, the third decade with the year 21, and so on.This decade and century started on January 1, 2001 and ends December 31, 2010.
840s