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I don't think the varying hour-length would apply, as there are too many complications with it for 'stellar-rotation' and what the decans do: every temple and priest would be up in arms about what they know; and every labourer would want shorter hours for the same pay as longer hours.
If you go for varying hour-length, then you have to include latitudes for the same hour-length no matter what time of year it is., just as long as the sun is directly overhead. As Earth has a tilt of 23.5 deg at the mo, and a range of about 2 or so degs, then you might be better checking out 24 as degrees and hours for a certain period of time in history...but we may have to include the circle and degrees: did the ancients divide their attention between 360 and 720 because it was necessary to do so?
That would mean a tilt of 12deg on the one hand, and 24 on the other...hmm...potential but I'm not sure...
If anyone and everyone can see us, what kind of character are we playing in our own story?