BC and AD have been the accepted designations for centuries. BCE came up because progressive a-holes didn’t like the Christian reference.
There is great controversy over exactly what year was his birth. That is another reason that it was easier to date from the present day backwards. It really does not have anything to do with religious preferences.
There is great controversy over exactly what year was his birth. That is another reason that it was easier to date from the present day backwards. It really does not have anything to do with religious preferences. Or political differences. However, many have turned it into one.