The label Anno Domini is almost certainly inaccurate; "scholars generally believe that Christ was born some years before A.
is a year-numbering system (calendar era) for the Julian and Gregorian calendars that refers to the years since the start of this era, i.e., since AD 1.
For decades, it has been the global standard, recognized by international institutions such as the United Nations and the Universal Postal Union.
The expression has been traced back to Latin usage to 1615, as and became more widely used in the mid-19th century by Jewish academics.
The story became national news and drew opposition from some politicians and church leaders.