Might have to do with the game being a work in progress? I imagine there's going to be more time-sensitive things as development continues.
The only thing I'm aware of that you haven't listed is that the refugee Maid will give you 2 Vitality potions if rescued by day 19 or earlier, 1 potion if day 39 (I believe) or earlier, and 0 if afterwards (because she doesn't exist). Rescuing the adventurers in Draknor Fortress is probably also on a clock, but I'm not entirely sure what the cut-off day is, exactly.