Re:You advocate a ________ approach to calendar reform (2013)
by jfengel on Friday July 24, 2020 @11:01AM
(#23940299)
8601's definition of a decade is somewhat different from common parlance. They're using it only to mean "the first digit of a two-digit year", and doesn't really apply it beyond that. If you stick to only that definition of a decade, you're going to have communication problems with human beings.
ISO 8601 defines what a 'decade' is.
I mean you're free to ignore it of course, like you're free to say March has 34 days if you want... but you may have trouble communicating with people and integrating with existing systems.