“A.D.” stands for Anno Domini, a Latin phrase meaning “in the year of our Lord.”

It is used to label years in the Gregorian calendar system:

• Example: A.D. 2026 = the year 2026 in the modern calendar system

Key points:

• Refers to years after the traditional birth of Jesus Christ
• Used in the Gregorian/Julian calendar dating system
• In modern usage, often paired with B.C. (Before Christ) or replaced in neutral terms by C.E. (Common Era)

In short, A.D. is a calendar label meaning years after the start of the traditional Christian era.