| Counting centuries | N00s |
|---|---|
| Caesar died in the 1st century BCE. | Caesar died in the 000s BCE. |
| Octavius died in the 1st century CE. | Octavius died in the 000s CE. |
Counting centuries as it has been traditionally done makes sense, because -1 and +1 are different numbers. Using "N00s" doesn't because -0 and +0 are the same number.
And it's easy to remember because the Nth century always ends (if positive) or starts (if negative) in the year N*100.
Moral of the story: don't tell people to fix what is not broken.