Is the Feast of Tabernacles one of the Feasts of the Lord according to Leviticus, book 3 of the Hebraic Scriptures, the Torah? Yes. Has it been replaced by Hanukkah? No. Neither Hanukkah or Purim are listed as Feasts of the Lord. These "feasts"/ "festivals" are part of the traditions of men. Is Hanukkah a replacement form of "Second Tabernacles" either? No. The ideas expressing these are from the Talmud and Kabbala, not Leviticus.
According to Nehemiah in Chapter 14:16, the Feast of Tabernacles will be observed under the reign of a King when pilgrims will be obliged to go up to Jerusalem to observe the Feast of Tabernacles. Here is the text from the KJV (King James Version) of the Scriptures. "And it shall come to pass, that everyone that is left of all the nations which came against Jerusalem shall even go up from year to year to worship the King, the LORD of hosts, and to keep the feast of tabernacles." When do all the nations come against Jerusalem? Just before the Second Coming of the Messiah (King). What then is the following period, the time frame? It will be the Millennial Reign, the 1000 year reign of Christ the King. Has the Feast of Tabernacles, the final of the 3 Pilgrimage Feasts and the concluding of the 7 Feasts of the Lord been abolished or changed into Hanukkah? No. The WORD of the Hebraic Scriptures is very different than the words in Talmud or Kabbalah. The WORD is not nullified, in any way. In Nehemiah 14:16 we clearly see the unchanging continuity of Scriptural commandment to observe and remember the Feast of Tabernacles, from Moses to Messiah to Millennial Reign of Christ the King. From the first words in Genesis to the last words in Deuteronomy, the Scriptural mitzvoh are unbroken, not nullified, and binding rather than loosed.
With Love and Shalom,
Jean