My position is that the Day of the Lord began to be fulfilled at the Coming of Christ, and was completed in 70 AD with the destruction of the Temple and Jerusalem.
I will begin by citing the primary "complex" of verses that imply my conclusion. I will be following the thematic structure upon which God designed His Word.
I begin therefore with the prophecies of John the Baptist given in the last book of the OT and fulfilled in the adjacent first book of the NT (an example of the thematic continuity of the Bible):
Malachi 3:1 Behold, I will send my messenger, and he shall prepare the way before me: and the Lord, whom ye seek, shall suddenly come to his temple, even the messenger of the covenant, whom ye delight in: behold, he shall come, saith the LORD of hosts. 2But who may abide the day of his coming? and who shall stand when he appeareth? for he is like a refiner's fire, and like fullers' soap: 3 And he shall sit as a refiner and purifier of silver: and he shall purify the sons of Levi, and purge them as gold and silver, that they may offer unto the LORD an offering in righteousness. Here we see that God directly associated the coming of John the Baptist in the first century with the "day of his coming." We know this was speaking of John the Baptist because Jesus said so.
This is confirmed in the second prophecy of John the Baptist:
Malachi 4:5 Behold, I will send you Elijah the prophet before the coming of the great and dreadful day of the LORD: 6 And he shall turn the heart of the fathers to the children, and the heart of the children to their fathers, lest I come and smite the earth with a curse. Almost identical language is used in Joel:
Joel 2:30-31 And I will shew wonders in the heavens and in the earth, blood, and fire, and pillars of smoke. 31 The sun shall be turned into darkness, and the moon into blood, before the great and the terrible day of the LORD come. The Bible also gives testimony that this happened in the first century:
Acts 2:19 And I will shew wonders in heaven above, and signs in the earth beneath; blood, and fire, and vapour of smoke: 20 The sun shall be turned into darkness, and the moon into blood, before that great and notable day of the Lord come: 21 And it shall come to pass, that whosoever shall call on the name of the Lord shall be saved. Of utmost importance is Peter's statement that "this is that" which was spoke by the prophet Joel.
Now consider what we have here. We have an integrated prophetic complex of multiple mutually confirming verses that all point to a first century fulfillment. And there a many others that confirm these, but I didn't want to write too big of a post.
My question to the futurists amongst us is this - on what basis should we reject this prima facie evidence that speaks of the "day of the lord" happening in the first century?
I think this is a good start,