Great lists so far!
I think we’re talking about oranges and tangerines. The question for me isn’t when Year 1 starts; I agree that there is no Year 0. But rather, when does a decade or century begin? I think it’s Jan 1, 2010 to Dec 31, 2019 or Jan 1, 1900 to Dec 31, 1999. Anyway, we may just agree to disagree on this one.