I don't know where you are getting a 1-year period of the wrath of God ?
Here is what happens at the 6th seal.
Rev 6
13
And the stars of heaven fell unto the earth, even as a fig tree casteth her untimely figs, when she is shaken of a mighty wind.
14
And the heaven departed as a scroll when it is rolled together; and every mountain and island were moved out of their places.
Here is the 6th seal event spoken of in Isaiah.
Isaiah 34
4
And all the host of heaven shall be dissolved, and the heavens shall be rolled together as a scroll: and all their host shall fall down, as the leaf falleth off from the vine, and as a falling fig from the fig tree.
5 For my sword shall be bathed in heaven: behold, it shall come down upon Idumea, and upon the people of my curse, to judgment.
6 The sword of the Lord is filled with blood, it is made fat with fatness, and with the blood of lambs and goats, with the fat of the kidneys of rams: for the Lord hath a sacrifice in Bozrah, and a great slaughter in the land of Idumea.
7 And the unicorns shall come down with them, and the bullocks with the bulls; and their land shall be soaked with blood, and their dust made fat with fatness.
8
For it is the day of the Lord's vengeance, and the year of recompences for the controversy of Zion.
The Lord comes for the second bride at the 6th seal, the chosen bride. The Church is already in heaven. At the gathering from heaven and earth, the Church is gathered from heaven and the 12 tribes across the earth are gathered from the earth. All return to heaven for the marriage supper. That is why there is a great multitude in heaven after the 6th seal in Revelation 7
The bridegroom when married does not go to war for 1 year. He stays with the bride. After the one year he can go to war.
Deuteronomy 24
5
When a man hath taken a new wife, he shall not go out to war, neither shall he be charged with any business:
but he shall be free at home one year, and shall cheer up his wife which he hath taken.
Here is the marriage supper of the Lamb. The bridegroom, Jesus, will not go to war until after one year. It is the day of vengeance and the year of recompenses.
Revelation 19
9 And he saith unto me, Write, Blessed are they which are called unto the marriage supper of the Lamb. And he saith unto me, These are the true sayings of God.
10 And I fell at his feet to worship him. And he said unto me, See thou do it not: I am thy fellowservant, and of thy brethren that have the testimony of Jesus: worship God: for the testimony of Jesus is the spirit of prophecy.
11 And I saw heaven opened, and behold a white horse; and he that sat upon him was called Faithful and True, and in righteousness he doth judge and make war.
So again, the great tribulation, which is when the dragon brings tribulation on the people of God is over before the wrath of God begins when God punishes the world for its evil.