By that logic 2000 is the last year of the second millennium, 2001 is the first year of the third millennium, 2002 the second, and 2003 the third.

The era started at year 1, and not year 0. So the new millenniums starts at years that ends with 1.

It’s also the third millennium of the era. 1-1000 AD was the first, 1001-2000 AD was the second, and we are now in the third.

I have never written a PhD thesis, so I might not be the best representative, but it’s the first time I’ve heard the phrase.

What is a doctor father?

No Rolls Bared played a round of this a while back in one of their House Rules episodes.