Pattern: 6, then the Day of the Lord:
In Revelation, after the events described in the sixth seal, then comes the Day of the Lord:
Rev. 6:12 I looked when He opened the sixth seal, and behold, there was a great earthquake; and the sun became black as sackcloth of hair, and the moon became like blood. 13 And the stars of heaven fell to the earth, as a fig tree drops its late figs when it is shaken by a mighty wind. 14 Then the sky receded as a scroll when it is rolled up, and every mountain and island was moved out of its place. 15 And the kings of the earth, the great men, the rich men, the commanders, the mighty men, every slave and every free man, hid themselves in the caves and in the rocks of the mountains, 16 and said to the mountains and rocks, “Fall on us and hide us from the face of Him who sits on the throne and from the wrath of the Lamb! 17 For the great day of His wrath has come, and who is able to stand?”
The seventh seal reveals the 7 trumpets. Trumpets 1-6 parallel Seals 1-6.
The seventh trumpet is sounded just after the events of the 6th trumpet and we see again this point in time is the Day of the Lord
Rev. 11:15 Then the seventh angel sounded: And there were loud voices in heaven, saying, “The kingdoms of this world have become the kingdoms of our Lord and of His Christ, and He shall reign forever and ever!”
Seals 1,2,3,4,5,6,Day of the Lord
Trumpets 1,2,3,4,5,6,Day of the Lord
They parallel each other and demonstrate the pattern of 6 and then the Day of the Lord.