The Gospel of Luke adds an account of John's infancy, introducing him as the miraculous son of Zechariah, an old man, and his wife Elizabeth, who was past menopause and therefore unable to have children. According to this account, the birth of John was foretold by the angel Gabriel to Zechariah while he was performing his functions as a priest in the temple of Jerusalem. Since he is described as a priest of the course of Abijah and Elizabeth as one of the daughters of Aaron, this would make John a descendant of Aaron on both his father's and mother's side. On the basis of this account, the Catholic as well as the Anglican and Lutheran liturgical calendars placed the feast of the Nativity of John the Baptist on 24 June, six months before Christmas.