Well, either this is believe or not, you must know. Giving references from the Bible as well. You have to know that I Thessalonians 4:16-18 is similar, and an adaptation to Matthew 24:29-31.

But what about the previous things our LORD JESUS CHRIST explained in Matthew 24, from verse 1 to verse 28, and from verse 32 to verse 51? Did Paul explain these?

So you must know that JESUS CHRIST is still superior to Paul and knows much better about End Time than Paul. So you should stop misquoting the Bible record of I Thessalonians 4:16-18.

Our LORD JESUS CHRIST explained clearly in Matthew 24 that it is immediately after the great tribulation that He shall come with great power and glory. Why have you then been confused about this?

Or will we say we do not understand what difference is in, "Immediately after the tribulation of those days…" and, "Immediately before the tribulation of those days…" is? I believe we all know.

Read this:

Matthew 24:29-31 Immediately after the tribulation of those days shall the sun be darkened, and the moon shall not give her light, and the stars shall fall from heaven, and the powers of the heavens shall be shaken:
And then shall appear the sign of the Son of man in heaven: and then shall all the tribes of the earth mourn, and they shall see the Son of man coming in the clouds of heaven with power and great glory.
And he shall send his angels with a great sound of a trumpet, and they shall gather together his elect from the four winds, from one end of heaven to the other.

And compare to this:

1 Thessalonians 4:16-18 For the Lord himself shall descend from heaven with a shout, with the voice of the archangel, and with the trump of God: and the dead in Christ shall rise first:
Then we which are alive and remain shall be caught up together with them in the clouds, to meet the Lord in the air: and so shall we ever be with the Lord.
Wherefore comfort one another with these words.

Now what about the previous sayings of our LORD JESUS CHRIST all through till you get to verse 28 of Matthew 24, and from verse 32 to 51? So let us try and see the truth that we do not prepare ourselves and the people for the Antichrist before preparing for our LORD JESUS CHRIST.

May GOD open our understanding heart to see this and all doubts be cleared.

Amen.