When Mary the mother of Jesus visited Elizabeth, Luke’s Gospel recounts that the baby “leaped” in Elizabeth’s womb at the greeting of Mary. As Christians, we know this is John’s first act of prophecy.
The Nativity of St John the Baptist is one of the oldest feasts of the Christian church, being listed by the Council of Agde in 506 as one of that region’s principal Feasts, where it was a day of rest and, like Christmas, was celebrated with three Masses: a vigil, at dawn, and at midday.
The Nativity of St John the Baptist on June 24 comes three months after the celebration on March 25 of the Annunciation, when the Archangel Gabriel told Our Lady that her cousin Elizabeth was in her sixth month of pregnancy, and six months before the Christmas celebration of the birth of Jesus. The purpose of these Feasts is not to celebrate the exact dates of these events, but simply to commemorate them in an interlinking way.