Beginning of the public ministry
The date of the beginning of Christ’s ministry may be calculated from three different data found respectively in Luke 3:23; Josephus, “Bel. Jud.” I, xxi, 1; or “Ant.”, XV, ii, 1; and Luke 3:1.
The first of these passages reads: “And Jesus himself was beginning about the age of thirty years”. The phrase “was beginning” does not qualify the following expression “about the age of thirty years”, but rather indicates the commencement of the public life. As we have found that the birth of Jesus falls within the period 747-749 A.U.C., His public life must begin about 777-779 A.U.C.