I covered that by showing you about it in the Book of Joel, which shows those signs happening immediately prior... to Christ's coming, still 'during' the "great tribulation," that is, if you believe Jesus' future coming will end the tribulation (I do). So if we believe what is written in Joel 2 & 3 about the sun moon being darkened ...
Joel 3:11-15
11 Assemble yourselves, and come, all ye heathen, and gather yourselves together round about: thither cause Thy mighty ones to come down, O LORD.
12 Let the heathen be wakened, and come up to the valley of Jehoshaphat: for there will I sit to judge all the heathen round about.
13 Put ye in the sickle, for the harvest is ripe: come, get you down; for the press is full, the fats overflow; for their wickedness is great.
14 Multitudes, multitudes in the valley of decision: for the day of the LORD is near in the valley of decision.
15 The sun and the moon shall be darkened, and the stars shall withdraw their shining.
KJV
That "day of the Lord" is the actual time when Jesus will appear coming in the clouds. That is when all on earth will be changed to their spirit bodies and see Him coming in the clouds, and His elect still alive on earth are "caught up" to Him, and the armies out of the northern quarters are destroyed (except the leftovers of Zech.14:16), and Jesus' feet touch down upon the Mount of Olives on earth, east of Jerusalem, with all His faithful elect with Him there. All that happens at an instant.
You believe that Christ's coming takes place during the great tribulation.
You also believe that the signs of Christ's coming take place immediately after the great tribulation.
I don't know how both can be true. How do the signs of Christ's coming take place immediately before and also during the great tribulation? A timeline might be helpful.
Thank you for defining what you have in mind with "day of the Lord."
Time is very relative in your world. Above we have an event occurring before and during a period of time and now instantly Jesus appears in the clouds and on the Mount of Olives on earth.
My guess is the interpretation of 1 Cor 15:52 is the problem. "In a moment, in the twinkling of an eye, at the last trump: for the trumpet shall sound, and the dead shall be raised incorruptible, and we shall be changed."
Most people believe this event and that of 1 Thes 4:13-17 are the same event. I don't. In 1 Cor 15:52 there is only a change from mortal to immortal that happens at an instant. No catching up is ever mentioned. The rapture imo is not an instantaneous event. It wasn't with Jesus and it won't be with the 2 witnesses. In both of these cases, people see/saw them go up to the clouds. In both cases, in an instant they changed from mortal to immortal.
What is the last trump? The trump is the voice of God the Father. It is heard by John in Rev 1:10 " I was in the Spirit on the Lord's day, and heard behind me
a great voice, as of a trumpet,". This is not the voice of Jesus. Jesus' voice is symbolized as the sound of many waters in Rev 1:15 "And his feet like unto fine brass, as if they burned in a furnace; and
his voice as the sound of many waters."
The voice of God the Father will be heard at the time of the rapture. 1 Thes 4:16 " 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:" IMO
this is not the last time the voice of God will be heard. Rev 20 describes a time after the 1,000 years of Jesus reign on earth where people will still be mortal.
1 Cor 15
23 But every man in his own order: Christ the firstfruits; (Jesus was 1st to be resurrected) afterward they that are Christ's at his coming. (There will be another resurrection when Jesus returns)
24 Then cometh the end, (After Jesus has reigned 1000 years on earth) when he shall have delivered up the kingdom to God, even the Father; when he shall have put down all rule and all authority and power.
25 For he must reign, till he hath put all enemies under his feet.
26 The last enemy that shall be destroyed is death.
54 So when this corruptible shall have put on incorruption, and this mortal shall have put on immortality, then shall be brought to pass the saying that is written, Death is swallowed up in victory. (This will be the last resurrection, the last time God's voice will be trumpeted in this creation. There won't be a rapture into the clouds at this time because creation itself will be dissolved.)