The use of the terms "A.D." (Anno Domini) and "B.C." (Before Christ) for time measurements in the Gregorian calendar does not necessarily imply a belief in a specific religious worldview. The Gregorian calendar is widely used for historical and cultural reasons, regardless of individual religious beliefs.
The Gregorian calendar, which is the most widely accepted calendar system globally, was introduced by Pope Gregory XIII in 1582. It is a modification of the Julian calendar and is primarily based on the estimated birth year of Jesus Christ as a reference point. The terms "A.D." and "B.C." were incorporated into the calendar to label years before and after the approximate time of Christ's birth.
While the Gregorian calendar has religious origins, its usage today is primarily cultural and historical rather than religious. The terms "A.D." and "B.C." have become widely recognized and used as a standard for dating events across different fields, including science, history, and academia.
It's important to note that the use of the Gregorian calendar does not indicate a belief or endorsement of any particular religious doctrine. It simply serves as a widely accepted framework for chronological dating due to its historical prominence and global adoption. In scientific contexts, alternative dating systems like the Common Era (C.E.) and Before the Common Era (B.C.E.) are sometimes used to avoid religious connotations while maintaining a consistent chronology.