[Mylo]

No, a 12 hour period is the "day" and a 12 hour period is the "night". Didn't it start with dividing day from night? Now your just trying to lump them together again. And the length of the hours changed depending upon the season so that a summer day hour was long and a summer night hour was short. So your absolutely wrong when you say that "from the beginning" we reckoned that a "day" was exactly 24 hours. No, it was 12 hours of various length.

[newgeezer]

So your [sic] absolutely wrong when you say that "from the beginning" we reckoned that a "day" was exactly 24 hours.

I don't think I used the word, "exactly."

At any rate, my point remains the same as it has always been. From the beginning, man has known what a "day" is. It is the period from one sunrise to the next. It's the sum of a waking period and a sleeping period, the full cycle. It's how he counts his days, how he measures the passage of time.

I must be missing your point, because I fail to understand how or why that can or must be argued. It's a given. The Bible was written by God through man for man. There is no valid reason to decide a day is anything other than a day.