“Now we come to the festival of Tabernacles-or Feast of Booths-the sixth festival. Let us notice the instruction concerning this occasion: “Thou shalt observe the feast of tabernacles seven days, after that thou hast gathered in thy corn and thy wine. And thou shalt rejoice in thy feast, thou, and thy son, and thy daughter…. Seven days shalt thou keep a solemn feast unto the Lord thy God in the place which the Lord shall choose: because the Lord thy God shall bless thee in all thine increase, and in all the works of thine hands, therefore thou shalt surely rejoice… and they shall not appear before the Lord empty: every man shall give as he is able, according to the blessing of the Lord thy God which he hath given thee” (Deut. 16:13-17). Here is the Festival of Tabernacles, to be kept for seven days, beginning the 15th day of the seventh month of God’s sacred calendar. Notice Leviticus 23:33-35: “And the Lord spake unto Moses, saying, Speak unto the children of Israel, saying, The fifteenth day of this seventh month shall be the feast of tabernacles for seven days unto the Lord. On the first day shall be an holy convocation; ye shall do no servile work therein.”
“On the first of these days is a holy convocation-a commanded assembly. No work is to be done. “… And ye shall rejoice before the Lord your God seven days…. It shall be a statute for ever in your generations: Notice that it is commanded forever. Here are pictured those final culminating events in God’s great plan: after Christ has died for our sins to redeem mankind-after He has sent us the Holy Spirit and picked out a people for His Name to become kings and priests through the thousand years-after His glorious Second Coming-after He has finally restored the redeemed by placing all the sins upon the head of Satan, their real author, and separating both him and the sins from the presence of God and His people, thus finally perfecting the at-one-ment, making us finally joined in one- then we are ready for that final series of events, the commencement of the “Marriage of the Lamb,”the actual making of the New Covenant, the establishment of the Kingdom of God on earth and the reaping of the great harvest of souls for a thousand years. This festival is the picture of the Millennium!”
“The Feast of Tabernacles is, strictly speaking, seven days long-to picture the entire Millennium. Seven is God’s number of completeness. Therefore, there must also be seven festivals. Let us notice where it is mentioned: “The fifteenth day of this seventh month shall be the feast of tabernacles for seven days unto the Lord… on the eighth day shall be an holy convocation unto you… it is a [day of] solemn assembly; and ye shall do no servile work therein’ (Lev. 23:34, 36). This eighth day, technically a separate feast, is called “the last day, that great day of the feast” (John 7:37). What does this final holy day represent? This is that judgment day mentioned in Matthew 10:15. It is a time when Gentiles who died in ignorance will be given an opportunity to receive salvation. Ezekiel 16:53-55 makes this very plain. Even those in Israel who died in their sins will be given their first opportunity to understand the truth of God and His way (Ezek. 37). The prophet wrote that God would pour out His Spirit on those resurrected (verse 14). This is precisely the salvation that Jesus mentioned in His sermon on that great day of the feast in the autumn of A.D. 30. This eighth day, which immediately follows the seven days of the Feast of Tabernacles, pictures the completion of the plan of redemption. It is just prior to the new heaven and the new earth. All-parents and children, young and old- will be resurrected.”
– Pagan Holiday’s Or God’s Holy Days Which? by Herbert W. Armstrong