Anno Domini, in the year of our Lord, since the birth of Jesus Christ so says the thesaurus, and who can argue with the thesaurus or dictionary.com.
Your prompt for #JusJoJan and Stream of Consciousness Saturday is “ad/add/AD (Anno Domini).”
Nonbelievers to Christians and everyone in between adds to their instruments of necessary paperwork the date based upon the birth of Jesus Christ. God is clever that way! In a way, it is His AD of advertising that He and He alone is King.