We will observe the feast of Tabernacles in the Millennial Kingdom.   

Also in the fifteenth day of the seventh month, when you have gathered in the fruit of the land, you shall keep a feast unto the Lord seven days: on the first day shall be a sabbath, and on the eighth day shall be a sabbath. - Lev 23:39

And you shall take you on the first day the boughs of goodly trees, branches of palm trees, and the boughs of thick trees, and willows of the brook; and you shall rejoice before the Lord, your Lord seven days. - Lev 23:40

And you shall keep it a feast unto the Lord seven days in the year.     It shall be a statute for ever in your generations: you shall celebrate it in the seventh month. - Lev 23:41

You shall dwell in booths seven days; all that are Israelites born shall dwell in booths: - Lev 23:42

That your generations may know that I made the children of Israel to dwell in booths, when I brought them out of the land of Egypt: I am the Lord, your Lord. - Lev 23:43