Paul speaks of Jewish fables that are to be avoided by God's people. The theory that Jesus will return on one of the old covenant feasts is one of them since it has no support from the Bible. Many folks get absorbed into these arbitrary, faddish ideas because they are ignorant both of the Bible and the historical teachings of the Church.
The feast days of the old covenant, like the rest of the ceremonial law, were given to point the Jewish nation of that day to their Messiah, Jesus Christ. As the Westminster Confession teaches they were given to a "church under age" to picture the future Messiah. Jesus testifies in Luke 24 that this mission was accomplished, and so we know that the ceremonial laws, including the feast days, no longer carry any prophetic significance.
Well said.
[Titus 1:14] Not giving heed to Jewish fables, and commandments of men, that turn from the truth. It is interesting to note that Paul includes "Commandments of men" in this verse. Our Saviour used that same wording in [Mark 7:7-8] when He spoke also of "Jewish fables": Howbeit in vain do they worship me, teaching for doctrines the commandments of men. For laying aside the commandment of God, ye hold the tradition of men, as the washing of pots and cups: and many other such like things ye do.
But....of course the Jewish Fables are not God's Laws. They are Jewish fables! As usual....some folks have a tendency to misinterpret some of Paul's most lucid comments as they have divorced themselves from any thing that may be construed as "JOOOish"!
[Romans 7:1-4] Know ye not, brethren, (for I speak to them that know the law,) how that the law hath dominion over a man as long as he liveth? For the woman which hath an husband is bound by the law to her husband so long as he liveth; but if the husband be dead, she is loosed from the law of her husband. So then if, while her husband liveth, she be married to another man, she shall be called an adulteress: but if her husband be dead, she is free from that law; so that she is no adulteress, though she be married to another man. Wherefore, my brethren, ye also are become dead to the law by the body of Christ; that ye should be married to another, even to him who is raised from the dead, that we should bring forth fruit unto God.
The above is an interesting analogy. Notice that Paul does not say the Law is dead. He says "We" are dead to the Law. This means the judicial demands of the Law which identified us as sinners and demanded a death penalty were no longer in effect. They were fulfilled through the sacrifice of Christ (verse 4).
[Romans 7:22-25] For I delight in the law of God after the inward man: But I see another law in my members, warring against the law of my mind, and bringing me into captivity to the law of sin which is in my members. O wretched man that I am! who shall deliver me from the body of this death? I thank God through Jesus Christ our Lord. So then with the mind I myself serve the law of God; but with the flesh the law of sin.
Because of Our Saviour's death we are no longer under the Law's power to punish us as sinners. Our Lord has provided a way to escape those judicial demands and that is why the Apostle says in [Romans 6:14] For sin shall not have dominion over you: for ye are not under the law, but under grace.
The theory that Jesus will return on one of the old covenant feasts is one of them since it has no support from the Bible.
For someone to say that Our Saviour's return would not take place on one of God's Holy Festivals is kind of rash.....since He was born on Sukkot, crucified on Pesach, and began his Church on Shavuot......it would seem plausible that a return on another Feast day would not be unusual. I would not consider it to be faddish if He chose to do that. I would consider it logical.