Bce ce dating system
And I have spent far too much time on Wikipedia changing BCs and ADs back to BCEs and CEs.
The years are the same, only the designations are different.
In fact, the dating system BC should be expanded as ‘Before Christ.’ It is interesting to note that the notation BC was followed for a long time until recently when the notation was challenged.
Since Christ is believed to have been born around 7 BC, the very usage of AD gets purposeless.
However, the difference is good enough to know them as distinct and separate.
As a matter of fact, BC is written after the year number.