The Holy Prophet-King David, St Joseph the Betrothed, and St 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, St Stephen (December 27), Sts James (April 30) and John (September 26), and Sts 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 St James (October 23) for Jacob, and then the commemoration of the Brother of the Lord became associated with his ancestor King David. In time, St. Joseph was linked with Sts David and James.