That matches up with 1 Thessalonians 5:2-3 and 2 Peter 3:10-12. He tries to say that the day of the Lord leads up to the final day of the Lord, but I don't see these passages as referring to "the final day of the Lord". It's the last days that lead up to the day of the Lord, as passages like Acts 2:16-21 (which references Joel 2:28-32) and 2 Peter 3:3-13 indicate.
As I've already said the prophets of Old connect the day of the Lord with these last days. The DOTL through the words of the prophet Joel shall be in these last days when whosoever shall call on the name of the LORD shall be delivered. The DOTL is described as being both a blessing and a day of wrath depending upon the state of man's soul. Therefore the DOTL is both a time for deliverance and on the last DOTL a time of God's wrath.
Joel 2:28-31 (KJV) And it shall come to pass afterward,
that I will pour out my spirit upon all flesh; and your sons and your daughters shall prophesy, your old men shall dream dreams, your young men shall see visions: And also upon the servants and upon the handmaids
in those days will I pour out my spirit. And I will shew wonders in the heavens and in the earth, blood, and fire, and pillars of smoke. The sun shall be turned into darkness, and the moon into blood,
before the great and the terrible day of the LORD come.
Joel 2:32 (KJV) And it shall come to pass,
that whosoever shall call on the name of the LORD shall be delivered: for in mount Zion and in Jerusalem shall be deliverance, as the LORD hath said, and in the remnant whom the LORD shall call.
Micah 4:1 (KJV) But
in the last days it shall come to pass, that the mountain of the house of the LORD shall be established in the top of the mountains, and it shall be exalted above the hills; and people shall flow unto it.
Isaiah 2:2 (KJV) And it shall come to pass
in the last days, that the mountain of the LORD'S house shall be established in the top of the mountains, and shall be exalted above the hills; and all nations shall flow unto it.