No, it is you that should be welcome - a century is different and you stated decade and as I posted the list of decades clears shows 2010 as the start of the decade ...
There is indeed variable opinions and texts on when is a decade
Some state that the first year as AD1 as thus a decade runs 1 - 10 with other texts stating that 0 - 9 is the correct definition of a decade. A number of these texts also make mention that a decade can be defined by the second last numeral of the year and thus 2010 by essence of the 1 is a different decade to 2009.
It all depends on who you read and where you get the information but I stand by mine and no doubt you by yours.
I like the explanation I came across on one site - does a child celebrate their 10th birthday on the tenth anniversary of their birth or the eleventh?
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