The Holy Prophet-King David, Saint Joseph the Betrothed, and Saint James the Brother of the Lord are commemorated on the Sunday after the Nativity. If there is no Sunday between December 25 and January 1, their commemoration is moved to December 26.
At an early date, some churches in the East began to commemorate certain important figures of the New Testament at the time of Theophany, and later during the Nativity season. In Syria, for example, Saint Stephen (December 27), Saints James (April 30) and John (September 26), and Saints Peter and Paul (June 29) were commemorated near the end of December.
In Jerusalem, the saints mentioned above were combined with a feast that the Jews of Hebron celebrated on December 25 or 26 in honor of the Old Testament Patriarch Jacob. Later on, the Christians substituted Saint James (October 23) for Jacob, and then the commemoration of the Brother of the Lord became associated with his ancestor King David. In time, Saint Joseph was linked with Saints David and James.