I've kind of mentally categorized things into daytime eerie and nighttime eerie.
That is exactly what got me thinking about why that might be, as I have quite a bit of minor strangeness in my house. In the day, it's (occasional) low key noises, and, like you say, an "off" feeling, but not enough to be off putting, if you know what I mean. But at night, it can become uncomfortable to the point of menacing.
I'll give you a couple of examples.
One
day, I was doing a general house cleaning, and was in the laundry room, in the basement. Just prior to that, I had been sweeping the kitchen, directly above the laundry room. I was switching the clothes to the dryer, and I distinctly heard the aluminum broom slide down the wall, where I had leaned it, and clatter on the hardwood floor, not a foot and a half above my head.
No big deal, I have to finish sweeping anyway, so I'll pick it up when I go upstairs. Except, when I come upstairs, the broom is still leaning against the wall. ???
Maybe something else fell, a curtain rod, or something? Nope, nothing had fallen, anywhere in the house, never mind in the middle of the kitchen floor, where I heard it fall.
Next example: One
night, I'm in the kitchen, at the sink doing dishes. The basement stairs and the back door are on my left hand side, but when I'm leaning over the sink, the fridge blocks my peripheral view of them.
After about 3 minutes, I can barely stand to stand there anymore. It feels like someone is staring daggers at me. It is not possible for anyone to be looking in the back door at me, because it opens onto a mudroom, that is about three feet off the ground, and had the stairs removed for renos at the time.
I shrug it off and turn back to the sink. Not even one minute later, something touched my hair! I had it up in a quickie bun on top of my head, and, for the life of me, it felt as if someone gently squeezed the entire bun.
Now, you'd think I'd freak out, but I'm like"no way that just happened!" So I calmly reached up, to see if a strand of hair had come loose and was tugging on my shirt or something. Nothing! So, that's when I beat a retreat to the living room, and phoned my friend for moral support!
There's no solid reason to believe weird things actually occur more frequently at night. There are demonstrable reasons to suspect average folks are more likely to construe things as weird in a nighttime environment.
,
I do agree with you on both points, as well as with the rest of your post.
I'm not saying I'm some above average person when it comes to sensing the "paranormal", but I'm very un-average when it comes to all of those things you mentioned. I'm not one for constant aural stimulation/distraction. I never wear earbuds/phones. I very often sit for hours reading, alone with only "natural" (traffic, birds, neighbours etc) background, no TV or music, both day and night and it doesn't freak me out in the least.
I also don't know how many "average" people might enjoy playing hide and seek, or going for a walk, on a moonless night, in the backcountry woods, with no flashlights, in bear country, but it was something I've done more than once, and was never "scared of the dark". (It does startle one though, upon standing in a field, looking up at the Milky Way, hearing a rustle and realizing there is a deer 15' away from you!)
Mostly, though, I'm consciously aware of the natural reaction of defensiveness and fear that comes from having our most primary means of sensory input diminished or removed. That's why, whenever something weird happens, especially at night, I doubly question if I'm construing it as something more than it is because of my psychological state of the moment, or if, in a calm, logical way, does it continue to happen/am I still getting the same "feeling" from the situation. (and, to be clear, what really changes at night, for me, is the intensity of the "feelings" I get. I know that's not very specific, but I can't describe it any better than that.)
My theory isn't that it happens more at night, just that we perceive it more strongly, because it is the "background radiation" which is overwhelmed by the intensity of daylight radiation.
(sorry for long post)