Abbreviated from Anno Domini Nostri Iesu Christi ("in the year of Our Lord Jesus Christ"), the predominantly used system for dating years across the world; used with the Gregorian Calendar and based on the perceived year of the birth of Jesus Christ. The years before His birth were formerly signified by a. C. n (ante Christum natum ("before Christ was born")), but now use the English abbreviation "BC" ("before Christ"). For example, Augustus was born in the year 63 BC and died in AD 14.
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