Ok then, well let me ask you this - why couldn't the 24 hour days of the great tribulation be literally shortened? And, also, what does "the day shone not for the third part of it, and the night likewise" mean in your estimation? Because it seems pretty clear to me from that verse that the interpretation that makes the most sense is the shortening of a 24 hour day down to 16 hours.
You are correct, Achilles. The days of 24 hour periods are literally "cut off" [the Greek means that], shortened, by one third. The numbers of them remain exactly as prophesied, counted, numbers, equaling a total of seven years, counted exactly as to their number in the Word of God from the very starting point of them to the very ending point of them. They are counted exactly in the Word, and God will not break His Word, ever.
But I have come to see in the Word of God that the earth is fixed, does not rotate, does not spin, and is not tilted.
This is the message of the Word of God over and over again, that the universe is earth centered, and all the universe and heavens were stretched out from the starting point of the earth, on the second day of creation week.
When Joshua commanded the sun and moon to stand still in their places, they stood still, not the earth.
When YHWH gave the sign to Hezekiah, He made the sun go backwards for ten degrees. He moved the sun, not the earth.
Now in Isaiah, you will find that the earth will be moved out of its place, turned upside down, and jump about as a chased roe and stagger as a drunken man in the days of the tribulation, when the waves roar, earthquakes are in diverse places, and every island flees, and the sun shines seven times brighter.
This is also in Enoch, who says the days will be shortened, and the seasons will be backward and fruits out of season, and that the sun will shine more brightly than its order in the tribulation, which he prophesied about first, as being that time of treasured up wrath of God, on the inhabitants of the earth, when all iniquity will be removed for the second consummation of sin on earth [the flood was the first consummation of sin on earth, stated Enoch].
You are correct in that this heat will come on the earth when the sun is smitten by the bowl of wrath cast into it, and the inhabitants of the earth are burned with great heat -and curse God.