This date falls nine months before Christmas and celebrates the conception of the Christ, when the soul accepts the influence of Light. The first record referring to March 25 as the feast of the Annunciation is a canon of the Council of Toledo in 656 C.E., where it was described as celebrated throughout the Church. All of Christian antiquity regarded March 25 as the actual date of the birth of Jesus.
"The Lord Himself shall give you a sign: Behold, a virgin shall conceive and bear a son, and shall call his name Emanuel. And it shall be said: The people that walked in darkness have seen a great light; they that dwell in the land of the shadow of death, upon them hath the light shined. For unto us a child is born, unto us a son is given; and the government shall be upon his shoulder; and his name shall be called Wonderful Counselor, the Mighty God, the Everlasting Father, the Prince of Peace. Of the increase of his government and peace there shall be no end, upon the throne of David and upon his kingdom, to order it and to establish it with judgment and with justice from henceforth even for ever." (From the Book of the Prophet Isaiah)