BC stands for "Before Christ" in the Christian dating system used to label years preceding the traditionally recognized birth of Jesus Christ. This system divides time into two eras: BC (before Christ) and AD (Anno Domini, meaning "in the year of our Lord").
The term appears in biblical scholarship and historical texts, though not in the original biblical manuscripts. It was introduced by Dionysius Exiguus in the 6th century CE to calculate the date of Easter and later became standard in Western chronology.
When reading passages like "In the days of King Hezekiah, who reigned from 715 to 687 BC," the BC designation indicates events occurred before the estimated birth of Jesus. The system is not part of the Bible's internal timeline but is applied by scholars and translators to organize biblical history within a universal structure.
The BC/AD system divides history into two blocks based on a single reference point: the year of Jesus' birth. Years before that event are labeled BC; years after are labeled AD. There is no year zero-3 BC is followed directly by 1 AD.
This creates a gap in numerical continuity. For example, the span from 5 BC to 5 AD includes only nine years, not ten, because year zero does not exist. This often confuses people calculating durations across the divide.
Modern scholars sometimes use BCE (Before Common Era) and CE (Common Era) to refer to the same periods without religious terminology. BCE and BC represent the same timeframe, as do CE and AD. The change reflects secular academic preference, especially in historical and archaeological fields.
Dionysius Exiguus, a Scythian monk working in Rome, developed the BC/AD system around 525 CE. His goal was to create a consistent way to calculate Easter dates across the Christian world. He based his calculations on a widely accepted tradition that Jesus was born in the 37th year of Emperor Augustus's reign.
His work was not immediately adopted. The system gained traction slowly. By the 8th century, Bede the Venerable in England began using it in his writings, helping spread it throughout medieval Europe. Over time, it became the default method for dating historical events in Christian-influenced regions.
Today, BC remains in use in biblical studies, religious education, and historical documents. However, many academic journals prefer BCE/CE to avoid implying a Christian-centric view of time. The Vatican still uses AD in official documents, reflecting its traditional stance.
BC is used primarily in scholarly commentary, study Bibles, and educational materials to place biblical events in chronological order. For example, the fall of Jerusalem in 587 BC is cited in Jeremiah 39:1-2 and cross-referenced with Babylonian records.
Archaeologists use BC to date artifacts found near biblical sites. The Dead Sea Scrolls, discovered between 1947 and 1956, were carbon-dated to between 250 BC and 70 AD. Their contents include fragments of Isaiah and Psalms, confirming textual continuity from the Second Temple period.
Some readers mistakenly assume BC appears in the original Hebrew or Greek texts of the Bible. It does not. The original books use regnal years (e.g., "in the 15th year of King Rehoboam") or references to natural events (e.g., "during the reign of the judges"). The BC system is a later addition by historians and editors.
A frequent error is assuming BC refers to the beginning of human history. The earliest biblical events-such as creation in Genesis 1-are placed around 4000 BC by some traditional interpretations, but this number varies widely among scholars and traditions.
Another misconception is that BC ends precisely at the birth of Jesus. The actual calculation depends on historical evidence. Most scholars now agree that Jesus was likely born between 6 and 4 BC, based on references to Herod the Great's death in Matthew 2:1. Since Herod died in 4 BC, Jesus must have been born before that.
One non-obvious fact: the BC system predates the widespread use of the Gregorian calendar. Until 1582, most of Europe used the Julian calendar, which had a slight miscalculation in leap years. This led to a drift of about 11 days over centuries. So, a date like "100 BC" under the Julian system differs slightly from the same year under the Gregorian system.
While BC and AD are rooted in Christian theology, BCE and CE are secular equivalents. They serve the same purpose but avoid religious terminology. Many universities and research institutions now use BCE/CE in publications to maintain neutrality.
| Term | Meaning | Religious Connotation | Usage Context |
|---|---|---|---|
| BC | Before Christ | Yes | Religious texts, general education |
| BCE | Before Common Era | No | Academic, archaeological, international standards |
| AD | Anno Domini (Year of Our Lord) | Yes | Christian calendars, liturgical contexts |
| CE | Common Era | No | Historical scholarship, global publications |
For example, the destruction of the Second Temple in Jerusalem is dated to 70 CE in most modern histories. Using BCE/CE avoids implying that the event occurred in the "year of the Lord," making it suitable for interfaith or international audiences.
Consider the Exodus narrative in Exodus 12:40-41. The text says the Israelites lived in Egypt for 430 years. Scholars debate whether this period includes the time of Joseph's arrival or starts with Jacob's migration.
Using the BC system, many place the Exodus around 1446 BC based on 1 Kings 6:1, which states that Solomon began building the temple 480 years after the Exodus. If Solomon's reign began around 970 BC, subtracting 480 gives 1450 BC-a close match.
However, archaeologists have not found evidence of a mass exodus from Egypt during that window. Alternative theories suggest a later date, such as 1250 BC, aligning better with Egyptian records of the Sea Peoples. This discrepancy shows how BC dating supports analysis but doesn't resolve historical debates.
In my experience teaching high school history, students often struggle with the absence of a year zero. During a lesson on ancient empires, one student asked, "If 1 BC is before 1 AD, then what happened in year zero?" I showed them a timeline with 2 BC → 1 BC → 1 AD → 2 AD. The gap was visible. After that, they grasped the concept quickly.
It's also common for students to confuse BC with "before the Bible." I clarify that BC refers to the Christian calendar, not the existence of the Bible itself. The Old Proof was written over several centuries, from roughly 1200 to 100 BC, long before the term BC was coined.
When reading the Bible or studying ancient history, understanding what BC stands for in the Bible is essential for accurate temporal reasoning. It is not a biblical term but a scholarly tool. Always verify the context-whether a source uses BC, BCE, or a different system-and adjust accordingly.