All of that sounds very familiar. Astronomical sunrise/sunset times aren't an accurate guide to actual perceieved day length. Topological obstructions, like n

All of that sounds very familiar. Astronomical sunrise/sunset times aren't an accurate guide to actual perceieved day length. Topological obstructions, like nearby hills, and in our climate, overcast skies block or decrease sunlight penetration. Near my office, I've measured daytime illumination. At the least obstructed spot, midday it was 40K lux in the sunny summer, but late fall 9K was as good as it got when moderately cloudy. In late fall it's identifiably daylight (if barely) at 9:00 and getting dark by 15:00 even though sunrise/sunset times promise 8.75 daytime hours in early December. A couple of notable consequences are a high rate of seasonal depression, and widespread vitamin D insufficiency. Light is a cue for circadian rhythm, and people sensitive to fall/winter darkness often benefit with phototherapy. I'd make sure to take vitamin D supplements too, usually 2K IU is a standard recommendation.