AD stands for Anno Domini, which is Latin for "in the year of the Lord." BC stands for Before Christ.
It is a system of numbering years that is based on the traditionally calculated year of the conception or birth of Jesus Christ.
Some people prefer to use the terms Common Era (CE) and Before Common Era (BCE) instead of AD and BC.
The AD/BC system is used to date both historical and modern events.
At present, the AD/BC system is still the most widely used system of numbering years.
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