The 7th Trumpet is not just a sound. It is a days long event. It is an angel who starts blowing the Trumpet in Celebration of the whole week of the Second Coming. All 8 days from Sunday morning to Sunday evening.
The 3.5 year time frame (of Satan) happens on Wednesday (if it happens). So this mighty Angel will not stop blowing even during the 3.5 years. Those extra 1260 days are still included in one long week.
The vials are poured out at the end. They are not in the 3.5 years. They are the second half of the week. Wednesday evening picks back up while the bodies of the 2 witnesses lay dead in Jerusalem. Jerusalem was the city were the festivities began. So, while the 2 witnesses remain unmoved, the seven vials are poured out, and the 7th Trumpet is still blowing. On Sunday while the 2 witnesses arise and ascend to heaven, God Himself gathers all humanity left into the plain of Megiddo. Then in the last few hours all humanity is harvested. The false prophet and the image are thrown into the lake of fire. The rest go to sheol, until the end of the 1000 years. Sunday by end of day, those beheaded or killed during the last 5+ years are resurrected. Monday starts the 1000 year reign. Because of the elects sake, Matthew 24:22 it is a shortened time frame. It does not go on for years and years.
The Second Coming is one week. Satan could get 3.5 years in the middle on Wednesday. The two witnesses lay dead 3.5 days. Starting on a Wednesday afternoon to Sunday early in the morning. That is the extent of the 7th Trumpet and the 7 vials. God's wrath. The few years leading up to the Second Coming are the 6 Trumpets and the 7 Thunderings. No one includes them, but they will happen after the 6th Trumpet. The church age cannot go past 1990 years from 30AD. Any human who does actual work (of any kind) after the start of the Second Coming, will be cursed with the mark 666. The business about economy is not the money. It is the labor. One cannot buy, sale or trade, without work. That was Adam's physical punishment.
By the sweat of the brow. By the mark 666 on the brow. Adam's punishment is over. Now; we are programmed by God to work. Now is over. God is telling us work and labor are over. What has stopped work and labor? God has. The 4th seal happened because the first 3 did not stop labor. Labor keeps going, because humans do not want to stop. The 6th seal happens and God rearranges the earth. Yet humans will soon forget God and attempt to keep working. God will send judgment after judgment and humans will still want to keep working.
Today we face a choice. Work of God, eternal rewards. Work of human carnal flesh, temporal pleasure while God keeps forcing humans to stop working. Yet some want to endure to the end. Endure by winning lost souls, or endure for sinful pleasure and what money can buy? By the middle of the Second Coming it will be either work, or get your head chopped off to prevent the body from working. Those with an expiration date of 666, will be rotten as if their names were never in the Lamb's book of life.