Depending on one's opinion toward solar scheduling, two very opposite timestamps could be attributed to moments like this. I've noticed that, on those nights (i.e. spans of moments during which I'm in the world's shadow, and thus it's dark outside) when sleep escapes me, I'm left with a lot of opportunities to evaluate myself and my impressions of the life I'm in. This usually results in a lot of realizations that come to me when there's no one I know awake to share with them - and in fact the existence of those realizations is probably a direct result of time spent away from popular interference. To most of the sun-scheduled world, this would mean that my favorite thoughts come to me in a time best labeled very early morning, right before they plan to be awake. To me, corresident alarm clocks most often feel like the closing bell on my day, heralding an urgency to finally yield to sleep before getting in the way of morning ritual and provoking some strange and awkward conversation on why I'm alert and prepared for any conversation at all when everyone I see is still trying to shrug off the dreams they've had interrupted by time commitments.
Regardless, whether you see it as time for breakfast or time for bed, this is the time for which I most desperately need a medium to store my first light conclusions, not because I consider them to always be particularly valuable, but because I want a chance to consider them at all. If I don't take a few moments to write down these thoughts I have when I'm by myself in the dark, then I will likely forget them over the course of more practical hours, and it will be like my favorite times to exist never happened, or at least never amounted to anything. I can't let it come to that, so I won't.
