With all respect, sir, the day of the Lord comes after the great tribulation. The day of the Lord is the wrath of God, the great tribulation is the wrath of man, namely the false Messiah, the antichrist.
The wrath of the day of the Lord, is God’s wrath upon the false Messiah and all that are to be deceived by him, that take his mark, in the great tribulation that precedes the day of the Lord.