Jesus being “born in 4 BC” is not a theological claim about him being born before himself , but a result of how our calendar was miscalculated centuries after his life, plus how historians date Herod the Great and other events around his birth.

Quick Scoop: Why 4 BC?

  • The BC/AD system was set up in the 6th century by a monk named Dionysius Exiguus, and he miscalculated the year of Jesus’ birth.
  • Later historical work (especially about King Herod’s death and Roman history) suggests Jesus was likely born between about 6 BC and 4 BC.
  • Instead of renumbering all years, historians kept the calendar as is and simply say: Jesus was probably born around 4 BC in our modern system.

So, the answer to “how was Jesus born in 4 BC?” is: because the calendar is off, not because Christians think Jesus was born “before Christ.”

Mini-Story: How the Mix‑Up Happened

Imagine centuries after Jesus, church leaders wanted a Christian way to count years, using his birth as “Year 1.”

Dionysius Exiguus tried to back-calculate when Jesus was born, using imperfect records and no modern astronomy or archaeology. He landed on a date that became 1 AD, but his math was off by a few years.

Fast forward:

  • Historians notice the Gospels place Jesus’ birth during the reign of Herod the Great.
  • Most scholars date Herod’s death to 4 BC (shortly after a known lunar eclipse and before Passover).
  • Since Jesus is described as being born before Herod died, his birth must be a few years earlier than the “official” 1 AD, likely around 4 BC.

No one wanted to re-label every historical date, so BC/AD stayed, and Jesus just ended up being born “before” the point that was meant to mark his birth.

Key Facts in Bullet Points

  • Jesus’ birth is usually placed between 6 BC and 4 BC based on historical and biblical clues.
  • Herod the Great’s death, tied to an eclipse and Roman records, is generally dated to 4 BC.
  • The Gospels of Matthew and Luke connect Jesus’ birth with Herod’s final years.
  • The calendar system (BC/AD) was created later and does not perfectly align with modern historical reconstructions.
  • There is no “year 0”; the system jumps from 1 BC to 1 AD, which also confuses people when they first hear “Jesus was born in 4 BC.”

Multiple Viewpoints Today

Because this is a trending and often debated topic online, you’ll see a few angles:

  1. Mainstream scholarly view
    Most New Testament and historical scholars put Jesus’ birth a few years before 1 AD, often around 4 BC, based on Herod’s death and Roman-era data.
  1. Alternative chronologies
    Some researchers propose slightly different dates (a bit earlier or later) depending on how they interpret Josephus, Roman records, and astronomical events.
  1. Skeptical or forum takes
    On forums and Reddit, some people argue it all shows the story is made up or historically unreliable, while others see it as a minor technical correction that doesn’t affect faith claims.

Simple Numbered Walk‑Through

  1. A monk miscalculated Jesus’ birth when designing the Christian year system.
  1. The system locked in “1 AD” as the supposed birth year, with earlier years called “BC.”
  1. Modern historians date Herod’s death to 4 BC using Josephus, eclipses, and Roman chronology.
  1. The Gospels say Jesus was born before Herod died, so his birth must be before 4 BC.
  1. Therefore, Jesus’ real birth year in our current calendar is likely around 4 BC, even though the calendar was built to start from his birth.

SEO Bits (Title, Meta, Keywords)

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Why do historians say Jesus was born around 4 BC when “BC” means “Before Christ”? Learn how calendar mistakes, Herod’s death, and modern research created this confusing but fascinating timeline.

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Bottom note: Information gathered from public forums or data available on the internet and portrayed here.