The disciples asked Jesus about the “Day” but they did not ask “when” will it occur, they asked “where” will it be. When Jesus replied He told them “where” it would occur He did not say “when it would occur”.
Mt 24:28 For wheresoever the carcass is, there will the eagles be gathered together.
Lu 17:37 And they answered and said unto him, Where, Lord? And he said unto them, Wheresoever the body is, thither will the eagles be gathered together.
This is very significant. They wanted to recognize “where” it would be happening. They did not wonder when it would happen, or if it would happen.
If most people were to ask Jesus today they would ask “when”. This is because the disciple’s understanding of the “Day” is not the same understanding as is held by most Christian people today.
The disciples asked “where” because they understood that the “Judgment” referred to as the “Day” happens in a place.
The “Day” is God’s judgment and it happens as God’s response to willful sin, Heb 10:26.
Heb 10:26 For if we sin willfully after that we have received the knowledge of the truth, there remaineth no more sacrifice for sins,
This “place” is in the life of a disobedient Christian, where the “eagles” (Demons) are gathered around a “dead Body” (backslidden Christian).
The demons gather around a spiritually dead Christian to bring God’s judgment. God’s judgment is designed to correct them, 1 Cor 11:32.
1Co 11:32 But when we are judged, we are chastened of the Lord, that we should not be condemned with the world.
Jesus was saying that His disciples could recognize the “Day” (Judgment) in the lives of other Christians by noticing whether or not there was demonic activity in the other believer’s life.
In Matt 24:28 Jesus told us exactly where the “Day of the Lord” would occur.
Mt 24:28 For wherever the carcass is, there will the eagles be gathered together.
Demonic activity in the life of a Christian therefore, is intended to alert other Disciples. To make them aware that the Day of the Lord (God’s negative Judgment) is occurring in this Christians life.
All this information, and Jesus commands to us when we recognize that a Brother is willfully sinful are included in the following scripture references.
Mt 24:15 When ye therefore shall see the abomination of desolation, spoken of by Daniel the prophet, stand in the holy place, (whoso readeth, let him understand:)
Mt 24:16 Then let them which be in Judaea flee into the mountains:
1Co 5:9 ¶ I wrote unto you in an epistle not to company with fornicators: 10 Yet not altogether with the fornicators of this world, or with the covetous, or extortioners, or with idolaters; for then must ye needs go out of the world. 11 But now I have written unto you not to keep company, if any man that is called a brother be a fornicator, or covetous, or an idolater, or a railer, or a drunkard, or an extortioner; with such an one no not to eat.