Mate This is your mistake
If we started at 1AD which we did then the 2000th year is 2001 !!!!!
If we started at the year 0 then the last year of the 20th century would have been the 2000th year and the terminology would be sound
As soon as that penny drops you'll be sound
We didn't start at zero ... that's the bloody anomaly
And stop talking like the end of one century and the start of another are different points in time ..... to quote you that's an important thing
Mate, I don't know if you're agreeing with me, disagreeing with me, or being deliberately obtuse.
Self-evidently, if we start at the year 1, then the last year of the 20th century is the 2000th year. And, specifically, the end if the 20th century is the last moment of the 2000th year. Importanrly, the 21st century didnt start until the 2000th year had ended: ergo, it started at the very moment the year 2001 started.
Can we agree, whatever else has been said, that this is correct?