You mean 14th Century BC, right?
“BCE” has no meaning. We date our years since the time of Christ. If somebody doesn’t like that, then adopt a firrerent dating calendar, maybe one that starts from the founding of Rome. That would make this the year 2476 or something like that
But if we’re going to call the current year, 2020, then we’re counting from the time of Christ, so it’s AD, and before it is BC.
