The related timings of the births of Jesus and John the Baptist
It is not specifically stated in the Bible when Jesus was born. However, the indications from Scripture give us a pretty good guide of when He was born, and importantly, when He was not born. We are given clues in the details concerning the priestly service of John the Baptist’s father, Zechariah, and the fact that Jesus and John were cousins.
Zechariah, was of the priestly division of Abijah (Luke 1:5,8). Back in King David’s day, the priests had been separated into 24 turns or divisions. These turns began in the first month of the Jewish calendar (1 Chronicles 27:2), March or April of our modern calendar. According to Talmudic and Qumran sources, the turns rotated every week until they reached the end of the sixth month, when the cycle was repeated again until the end of the year. This would mean that Zechariah’s division served at the temple twice a year.