There are several reasons why the beginning of Christ's ministry (Luke 4) fits better with the Day of Atonement than Pentecost. The assumption that Pentecost was the origin stems from a speculation that the triennial cycle used today was in force 2,000 years ago. Jesus did not stick with the exposition from Isaiah 61, but mixed with Isaiah 58 and Isaiah 42, not part of the triennial cycle. If Christ's ministry began on Pentecost, it would throw a major wrench into our understanding of the Seventy Weeks Prophecy making Christ's ministry 4 years instead of 3½ years. Christ's themes were more consistent with the Jubilee, proclaimed on the Day of Atonement. When Jesus, proclaiming His Messiahship, declared the Gentiles co-inheritors of salvation, the angry members of the local synagogue tried to lead Him out of the city to throw Him over the cliff, paralleling the Jewish tradition for the azazel goat, a penalty reserved for Atonement only. Furthermore, Pentecost was a pilgrimage festival, so it is unlikely either Jesus or many people would have been in the synagogue at Nazareth. If Christ's 3½ year (1,260 days) ministry began on the Day of Atonement, the time elements of prophecy fit together consistently. Christ's ministry fulfilled the first half of the week, and the last half lies ahead.