Originally Posted by d.sound
fyi, the calendar began at year 1 not year zero. the next decade doesn't start until 2021
a decade is not like a century that marks the calendar.
a decade can begin and end wherever one chooses.
so the 10s is just the 10 years that begin with 1 (in this context)
2001 is the real beginning of the xxi century, but 1980 was the beginning of the 80s. apples, oranges