In the 20th century we would have had to say one thousand nine hundred ninety nine or nineteen hundred ninety nine. nineteen ninety nine wins because it is easier. Conversely, two thousand one is just as easy and seems more natural than twenty O one. That may or may not change as we bet further into the century.

I'll bet that by the end of next year we will hear this year refered to as back in 01 as we hear back in 99 and so it will be as we go forward.

I would bet that in a hundred years we will say twenty one oh one. instead of two thousand one hundred one. Of course only Dan will still be around to settle that bet. :-)