You're incorrect. The long-established standard has always been otherwise.
As recently as the late 60s a movie was made called 2001: A Space Odyssey. It was about weird stuff occurring at the beginning of the new millennium.
The Gregorian Calendar lays this stuff out. Disregarding long-established order is for libtards.
If the REAL century ended in 1999, and it was simply common wisdom that it was at the end of 2000, we would have had more luck convincing people.
But trying to convince people who wanted a party that they should wait another year was simply more than we could accomplish.
Especially since we had the “Y2K” computer fiasco, which cemented the idea that the transition from 1999 to 2000 was somehow “important”.
Pluse, in 1901 we didn’t have 40 years of mind-numbing public school education making people stupid.