'Year of' in the Bible

Now it was the fifteenth year of the reign of Tiberius Caesar. Pontius Pilate was governor of Judea, Herod was ruler of Galilee, his brother Philip was ruler of the regions of Ituraea and Trachonitus [Note: These two men were sons of Herod the Great (See Matt. 2:1) and ruled over provinces east of the Jordan River] and Lysanias was ruler of Abilene [Note: This was a province just north of the two previously mentioned ones].

to proclaim the year of the Lord's acceptance [i.e., the time when people would become His obedient followers]."