The Millennium/21st Century

[pocaracas]

But when you look back, you realize that there was no zeroth century for pre-100 C.E., so yeah.

That's because that was the first century.

Much like your first year of life spans between your birth and your first birthday, minus a day at the end.
The second year of life spans from your first birthday to your second, again, minus a day.
And so on, and so forth...
It's a logical way of counting years and centuries... but it messes up people's brains... so sorry, logic wins!