Acts 17 offers a unique picture into the Gospel that the Apostle to the Gentiles believed and proclaimed throughout the Jewish diaspora. In this episode, we see Paul offering a survey of history in order to explain the coming Day of the Lord as a means of calling Gentiles to repentance and faith. We survey the concept of the Day of the Lord briefly in the Jewish prophets and then follow the idea through later Jewish writings which laid the foundation for the proclamation of the Gospel and the coming day of judgment in the New Testament writings.