Google John Aquila Brown. He's the 2nd Adventist from whom CTR appropriated the idea of the Dan. 4 - Luke 21 connection.
You would think that in Jesus' mentioning specific prophecies in Daniel 4 and 7, he would have made a specific reference to Daniel's prophecy re Nebuchadnezzar's period of insanity if indeed it was relevant.
Another aspect to this discussion is the arbitrary application of the day-for-year calculation. In the two biblical instances it appears, it is linked to two specific outcomes: the 40-year trek in the wilderness (Numbers) and the judgments against Israel and Judah (Ezekiel). If there is a pattern to be followed in using this calculation, certainly it would include mention of the event it was being linked to. Not so with 2,520 days/years. Linking this calculation to 2,520 days is at the whim of the likes of John Aquila Brown and CTR.
DNCall