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Understanding A.D.: The Meaning Behind the Year Numbering System

A.D. stands for "Anno Domini," which is Latin for "in the year of the Lord." It is used to number the years of the Gregorian calendar, which was introduced by Pope Gregory XIII in 1582. The calendar is based on the birth of Jesus Christ, and the years are counted from the traditional date of his birth, which is believed to have occurred on December 25, 1 BC.

So, A.D. 1 would be the year 1 after Christ's birth, and A.D. 2 would be the year 2 after Christ's birth, and so on. This system of numbering the years has been widely adopted by many cultures and religions around the world, and it is now used as the standard way of counting the years in the Western calendar.

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