Interesting. There is so much you can do. I do plan to have a dimming overlay for dark areas, but I hadn’t thought about the moon. You could add lightness based on the moon phase.
The background colour of the days is supposed to indicate the day. I was thinking of adding another row of 24 hours to highlight the hour of the day.
BTW, I assume you know about the swiping up/down for slower change in days. One map width up/down = 1 day change.
Cheers, Duane