The "Christian Era" refers to the period in history that begins with the birth of Jesus Christ, which is traditionally dated to around 4 to 6 B.C. This era is commonly divided into two main parts: B.C. (Before Christ) and A.D. (Anno Domini, meaning "in the year of our Lord"). The Christian Era is used as a standard calendar system in many parts of the world today. The Christian Era is significant for its influence on Western culture, religion, and history. It marks the spread of Christianity, which has shaped various aspects of society, including art, law, and ethics. The calendar system based on this era is widely adopted, making it a key reference point for historical events.