My city is a bit to the north of ISS orbit's northmost point (inclination is 51°, my city is N55°). I observed ISS around 23:xx in summer at its heighest point over horizon, 45°.
I supposed that the orbit northern point (lets call it ONP) is stable and with season it changes it's side: it may be on the lit side, half year later it's in shadow.
An observer like me sees ONP pass every day (Earth rotates "inside" the orbit), and with season it should be later every day. Apparently, in my winter it passes at noontime, I don't see it in the bright sky. In summer it passes around midnight.
At least this observation concords with my theory: it's a bit more than 1/4 of year till summer solstice, and it's visible 1/4 of day till midnight.
Am I right with the conclusion? Is ISS orbital plane stable as I describe?
This image shows the opposite picture. ONP is on the far side of this image, and with seasons Sun should move in counter-clockwise manner (in geocentric system). So, with season, the time I pass near this point should move to earlier, to daytime rather than to midnight.
Wikipedia illustration: same side (for example, a distant star) in inertial reference system should be seen earlier and earlier with seasons changing.