I believe the days in Exodus 20:8-11 are as other days of 24-hour duration, and that the original readers would certainly have understood them in such a manner. Unlike the day, month, and year, the 7‑day cycle of a week does not correspond to anything in nature (like rotation of earth, orbit of earth, cycle of moon, etc.).
That is an interesting thought. I am unaware of much information by which we may place the fall of Satan on a timeline. There is the text in Ezekiel 28:13-19 which has often been interpreted as about Lucifer or Satan (though some do not accept it as such). Intriguingly, it mentions "Thou hast been in Eden the garden of God" in a context that would be before his fall.
I agree it is Satan in Ezekiel as the King of Tyre vs the Prince of Tyre.
and they are reserved in darkness when previously they were in total light from the throne
Jde 1:6
And the angels which kept not their first estate, but left their own habitation, he hath reserved in everlasting chains under darkness unto the judgment of the great day.
and are here and expecting a time of torment
Mat 8:28
And when he was come to the other side into the country of the Gergesenes, there met him two possessed with devils, coming out of the tombs, exceeding fierce, so that no man might pass by that way.
Mat 8:29
And, behold, they cried out, saying, What have we to do with thee, Jesus, thou Son of God? art thou come hither to torment us before the time?