Paul Winalski wrote:This list seems a bit premature, since that the first decade of the twenty-first century doesn't end until 31 December 2010 (the numbering system for years starts at one, not zero, folks!).
-Paul W.
Oh, c'mon Paul. This is how popular culture defines a decade (or century, or millenium). I celebrated the new millenium like most everyone else - on Jan 1, 2000, even though I am a physicist and know perfectly well how to count forward and backwards.
You don't have to apply rigid math to what is essentially a psychological categorization of years and numbers. And it is not even literally incorrect to do what popular culture finds natural. The first decade of ordinal numbers starts at 0 and ends at 9. "0" is the first number! The next decade starts when we begin the 10s place, at 10, not 11. The first century begins at 100, not 101, when the 1 shifts to the 100s place. This is how our psychological connection to the decimal system works. We are trained that way and appreciate things that way. So we can designate that the first decade of the 0th millenium began in 1 BC, if we really need a place to zero our timeline. It does not matter what people back then called their years because none of that was standardized then. By defining our decades/centuries/millenia this way, the problem of when negative decades began and ended is levied on dead people who never even knew they lived in negative times.
The real problem is that religous historians tended to define years relative to the presumed (yet imprecisely known) year of Jesus' birth. So they follow year -1 by year 1. That system is not sensible from a numerical point of view. A system that tries to force our natural concept of decades and centuries to abide by that zero-point error is irrational. People do not deserve to be criticized or corrected for thinking rationally and naturally about when decades and centuries begin and end. So frankly, we can take what works now and fix the problem from 2010 years ago by stipulation.