Hi, Ping,
I thought about leaving this for another headscratcher, but I'm not sure there's enough on the topic to discuss to be the start of another thread.
"Context is everything;
Everything is context."
I am reminded of the "2010 is the start of a new decade"
"No it's not"
discussion we had early last month.
Thank goodness all parties weren't pig headed and itching for a fight!
That seems as good a case as any that, all parties to the discussion were correct, in their respective context, yet upon presentation and without context, were mutually exclusive (yes it is/no it's not)
Any new year that ends in zero (00, 10, 20, 30, etc) in a decimal calendar system is the start of a new decade. End of discussion, that's the way it is.
BUT
if one were to look at a calendar system that starts with an event, such as the death of Christ/Buddha/Mohammed/detection of the Northern Star/ascension of new Pharoah/emperor/dynasty/etc where the counting starts with 1 instead of 0 (zero) then indeed, WITHIN THE SPECIFIC CONTEXT, the new decade doesn't start until 01 (11, 21, etc)
Ah, I wonder how many wars start because of mis aligned context!