1 Jan
2020
1 Jan
'20
11:43 a.m.
On Wed, Jan 1, 2020 at 10:33 AM James Propp <jamespropp@gmail.com> wrote:
I’ve heard that, “officially”, the 21st century began on January 1, 2001, not January 1, 2000.
The first century anno domini (or of the "common era") was the year 1 to the year 100, so the 21st century was the year 1901 to 2000. The 203rd decade would be the years 2021 to 2030. But we don't ever say "the 203rd decade" as a reference to what decade we're in. Instead, we used zero-based indexing for decades. The "1980s" are those years pronounced "Nineteen eighty-(something)", which includes "1980". https://xkcd.com/2249/ -- Mike Stay - metaweta@gmail.com http://math.ucr.edu/~mike https://reperiendi.wordpress.com