While researching Portuguese national hero Viriatus (I’ll post about him later… Ooh, nice teaser, eh?) I noticed the Wikipedia entry gave a date as 147 a. C. That prompted me to wonder whether it meant AD or BC.
BC, apparently. It’s short for antes de Cristo. And its now 2017 d. C. (depois de Cristo).
(Update – I changed the article to match the correct AO spelling. “a. C.” and “d. C.” take a lower case first letter and upper case second letter and even the space between the first dot and the C is obligatory!)