(whinge with a religious bent)
I've been hiding under a rock all these years. Centuries some might say. I've just discovered that the secularist have had a field day while I was under that rock.
It's no longer correct to use the abbreviation BC (Before Christ) nor AD (Anno Domini - translated as in the Year of our Lord). It's now BCE (Before the Common Era) or CE (Common Era). It matters not if 10 BC = 10 BCE or 2010 AD = 2010 CE.
Wikipedia said it better than I ever could...
"...the use of BCE/CE shows sensitivity to those who use the same year numbering system as the one that originated with and is currently used by Christians, but who are not themselves Christian."