Literally everything in your comment is incorrect ;)
As I said before, it was the Christians who applied different terminology to an already extant calendar. Like every other Chirsto festival/date they picked someone else's. We also don't use BC and AD anymore ;) it's BCE and CE (before common era, and common era). Science is ahead of you.
Lol, no, I use it to store my memes. Yours was just retarded enough that it warranted comment. Unfortunately the calendar is what it is, it would be counterproductive to come up with a new one.
You mean the Gregorian calendar which is merely a refinement of the Julian calendar which predates Christianity? And what relevance does that have? We don't have a choice which calendar to use, nor does a calendar have any bearing on belief.