Most of this you know, but just in case:
The traditional date of a December 25 celebration
- Limited contemporary records – The Gospels were written decades after the events and do not give explicit calendar dates.
- Differences between the civil and ecclesiastical Jewish calendars – The “month of Nisan” can start in March or April depending on the year’s intercalation.
- Variations in ancient Roman and Jewish calendrical calculations – The Julian calendar (used by the early church) drifted relative to the solar year, complicating direct conversion to the Hebrew lunisolar calendar.
- Interpretive clues – Phrases like “shepherds were in the fields” (Luke 2:8) can be read literally (favoring spring) or symbolically (allowing a winter setting).
- Most scholars agree that the birth most plausibly occurred between 6 BCE and 4 BCE.
- If we follow the traditional Western dating, conception would be in Nisan (spring) and birth in Kislev/Tevet (winter).
- If we follow the “spring‑birth” argument, conception would be in Kislev/Tevet (winter) and birth in Sivan (late spring/early summer).
Both possibilities fit within the structure of the Jewish calendar; the exact months remain a matter of scholarly interpretation rather than definitive historical fact.
The presence of shepherds in the fields at night (Luke 2:8) is often cited as evidence that Jesus was not born in December, since cold and rainy winter conditions in Judea would have made outdoor shepherding unlikely. Most sources indicate that shepherds typically kept flocks in open fields from spring to early autumn, with flocks brought in by early November.
However, some scholars argue that certain temple-related flocks near Bethlehem—possibly those referenced in Luke—were kept in the fields year-round, including in winter, to provide sacrificial lambs. This could allow for December shepherding in specific contexts.
Despite this, the choice of December 25 was not based on historical or biblical evidence of Jesus’ birth date, but on theological and cultural factors. Early Christians calculated December 25 based on the belief that Jesus was conceived on March 25 (the date of His crucifixion in some traditions), leading to a December birth after nine months. Additionally, the date coincided with the Roman winter solstice and the festival of Sol Invictus, allowing the Church to offer a Christian alternative to existing pagan celebrations.
Thus, while the shepherds' presence suggests a warmer season, December 25 was chosen for symbolic and liturgical reasons, not climatic or historical accuracy.
IMHO, Jesus was conceived in the winter and born in late spring, but however you interpret the data, God picked the right time.
Verse for Today: "In the fullness of time, God sent His son." (Galatians 4:4)
