I understand this if you take the point of view that they ("they") are trying to maintain a Christocentric calendar but hiding that fact so there's no pushback. However, seeing as the calendar isn't going to change any time soon, isn't it better to change the terminology so you're not forcing non-Christians to talk about years in very overtly Christian terms?
Also it's not that new, Common Era phraseology stems from around the 18th century.
― emil.y, Thursday, 28 June 2018 12:24 (five years ago) link