You shall count off seven Sabbaths of years, seven times seven years; and there shall be to you the days of seven Sabbaths of years, even forty-nine years. Then you shall sound the loud trumpet on the tenth day of the seventh month. On the Day of Atonement you shall sound the trumpet throughout all your land. You shall make the fiftieth year holy, and proclaim liberty throughout the land to all its inhabitants. It shall be a jubilee to you; and each of you shall return to his own property, and each of you shall return to his family. (Lev. 26.8-10 WEB)
In a moment, in the twinkling of an eye, at the last trumpet. For the trumpet will sound, and the dead will be raised incorruptible, and we will be changed (1Cor. 15.52 WEB).
For the Lord himself will descend from heaven with a shout, with the voice of the archangel, and with God’s trumpet. The dead in Christ will rise first (1Th. 4.16 WEB)
With the aforementioned verses I suggest that the promised return of the Lord occurs, prophetically, at Yom Kippur and not Yom Teruah. By seeing the Jubilee trumpet as the “last trumpet,” which it appears to be in the prophetic year, a better fit is achieved. The Yom Teruah commemoration is on the first day of the seventh month while Yom Kippur falls on the 10th day of the same month. Therefore, if it is the “last trumpet,” then it must be the proclamation of liberty associated with the Jubilee observance. This releasing of those in bondage to their inheritance seems to be an accurate fulfillment of the concept of the Lord returning to give final salvation (soterion): so Christ also, having been offered once to bear the sins of many, will appear a second time, without sin, to those who are eagerly waiting for him for salvation (Heb. 9.28 WEB).