Keeping time: the origin of BC and AD

The terms “AD” and “BC” have roots in Christianity. “AD” is an abbreviation for the Christian era (Latin for “the year of the Lord”), specifically Jesus Christ. “BC” is an abbreviation for “before Christ”.

The system labels the year based on the traditional concept of When Jesus was born — “AD” indicates a few years after his birth, and “BC” indicates a year before his birth.

Keeping Time: The Origin of BC and AD Source Link Keeping Time: The Origin of BC and AD

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