…Fuck, you're boring. Information warfare is irregular. Obviously, you're not fit, for it.
…UV blocking, as to perpetuate disease and limit sun absorption (vitamin D production). At least, during the day. The evening/night, no idea.
…Maybe they're a nocturnal mammal. Could get into the archaic 'day/night' cycles of the rotating Saturn crescent, but It tends to confuse even the non-normies.
…This oddly seems all too familiar. May have watched some medieval documentary (having to read between the lines) and there was a brief mention of getting up, in the middle of the night, then going back to bed, until the sun rise.