You re saying CE and BCE aren t used outside of the US I don t believe that is so they are used throughout the English speaking world to a varying degree Even in the United States they are not at all widespread in popular culture with the 2008 film 10 000 BC being a prime example they also showed ads promoting a release date suffixed AD not CE CE BCE are moreso used within Jewish circles and academia the latter having been at odds with religion for so long that it seems only natural for them to want to use a secular euphemism for anything remotely associated with Christianity