The return of Christ is a 'sudden destruction' not some long drawn out years long event.
6th seal all happens in one day, the last day is the return of Christ
1 Thess 5
But concerning the times and the seasons, brethren, you have no need that I should write to you. 2 For you yourselves know perfectly that the day of the Lord so comes as a thief in the night. 3
For when they say, “Peace and safety!” then sudden destruction comes upon them, as labor pains upon a pregnant woman. And they shall not escape.
4
But you, brethren, are not in darkness, so that this Day should overtake you as a thief. 5 You are all sons of light and sons of the day. We are not of the night nor of darkness.
6 Therefore let us not sleep, as others
do, but let us watch and be [a]sober. 7 For those who sleep, sleep at night, and those who get drunk are drunk at night. 8 But let us who are of the day be sober, putting on the breastplate of faith and love, and
as a helmet the hope of salvation. 9 For God did not appoint us to wrath, but to obtain salvation through our Lord Jesus Christ, 10 who died for us, that whether we wake or sleep, we should live together with Him.
11 Therefore [
b]comfort each other and [
c]edify one another, just as you also are doing.
Jesus told us to be careful and watch! As does Paul.
Matthew 24:42
Watch therefore, for you do not know what hour your Lord is coming.
Matthew 24:43
But know this, that if the master of the house had known what hour the thief would come, he would have watched and not allowed his house to be broken into.
Matthew 25:13
“Watch therefore, for you know neither the day nor the hour in which the Son of Man is coming.
Mark 13
The Parable of the Fig Tree
28 “Now learn this parable from the fig tree: When its branch has already become tender, and puts forth leaves, you know that summer is near. 29 So you also, when you see these things happening, know that [
i]it is near—at the doors! 30 Assuredly, I say to you, this generation will by no means pass away till all these things take place. 31 Heaven and earth will pass away, but My words will by no means pass away.
No One Knows the Day or Hour
32 “But of that day and hour no one knows, not even the angels in heaven, nor the Son, but only the Father. 33 Take heed, watch and pray; for you do not know when the time is. 34
It is like a man going to a far country, who left his house and gave authority to his servants, and to each his work, and commanded the doorkeeper to watch. 35 Watch therefore, for you do not know when the master of the house is coming—in the evening, at midnight, at the crowing of the rooster, or in the morning— 36 lest, coming suddenly, he find you sleeping. 37
And what I say to you, I say to all: Watch!”
Revelation 3:3
Remember therefore how you have received and heard; hold fast and repent. Therefore if you will not
watch, I will come upon you as a thief, and you will not know what hour I will come upon you.
Rev 16
14 For they are spirits of demons, performing signs,
which go out to the kings [
a]of the earth and of the whole world, to gather them to the battle of that great day of God Almighty.
15 “Behold, I am coming as a thief. Blessed
is he who watches, and keeps his garments, lest he walk naked and they see his shame.”
16 And they gathered them together to the place called in Hebrew, [
b]Armageddon.