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KLXVER said:
VAMatt said:

A 30 second Google search revealed this: http://www.answers.com/Q/Does_2010_or_2011_start_the_new_decade 

Yes. Like they say there:

 

What year does a decade start?

as we are now in the 21st Century, the decades start as 2010, 2020, 2030, 2040, 2050, 2060, 2070, 2080, 2090 and the 22nd Century will start as 2100

  

Hmm.  I guess those are answers from different people.  Anyway, since a decade is ten years, and since there was no year zero, I hold that decades start at year XXX1.