Replacing it with "Common Era"/"Before Common Era" reinforces the notion of a global, common epoch starting at the height of the Roman Empire.When "Christian Era" is used, it's still clear what epoch is being referred to (i.e.the Western one) without having to have some special knowledge about what "anno domini" means or who Christ is.Wikipedia also mentions an issue with the Julian Calendar and the Gregorian Calendar historically both using AD/BC, leading to some confusion as to which calendar system is being referred to: The terms "Common Era", "Anno Domini", "Before the Common Era" and "Before Christ" can be applied to dates that rely on either the Julian calendar or the Gregorian calendar.It's just as good as the Nth year of reign of Pharaoh Whoever - doesn't require you to believe in the deity of a particular egyptian Whereas making it "common era" implies that it's the correct one and all the others are wrong.Archaeologists also use BP - before present - which is confusingly set as 1950.
Would you like to answer one of these unanswered questions instead?
After all, there are all sorts of inconsistent and illogical stylistic elements in English usage.
But when you take into account that the old meanings are widely believed (even by Christians) to be actually wrong, you now have a convention that's actively creating confusion.
However, this would mean that the approximate 33 years commonly associated with the life of Jesus would not be included in either of the BC and the AD time scales.
Terminology that is viewed by some as being more neutral and inclusive of non-Christian people is to call this the Current or Common Era (abbreviated as CE), with the preceding years referred to as Before the Common or Current Era (BCE).