But that little jewel of trivia doesn't apply to nicknames we give decades
or even centuries.

It certainly applies to centuies. The first 100 years began with year 1
and ended with year 100. I suppose the ninteenth century (1801-1900)
and the "eighteen hundreds" could be "off by one" should you wish call
the "1940s" 1940-49.

And if we give nicknames, we can nickname them anything we want. So
there.

Jose
--
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