In message ,
Steve Jackson writes
Given that the media has begun celebrating the decade 2010-2019, with
various awards for best band, artist, book, film etc, I was wondering
why those of us in the climatological world stick with 2011-2020, or
for 30-year records, 1991-2020?



I'm sure it is down to precedence dating back into the early days of
record keeping, but is there any other reason for this, I wonder?

Because, strictly speaking, it's correct. Because there was no year
zero, the first decade AD was years 1-10, the next was 11-20 and so on.
--
John Hall
"If you haven't got anything nice to say about anybody, come
sit next to me."
Alice Roosevelt Longworth (1884-1980)