You wouldn't have to create new stuff for every time of day.Well, if i would create stuff to do for every single time in game it would be way to much to do for me and there would be a lot of useless content.
I know some players did not notice the ! on the phone and i am also sure one player did ignore a ! for a couple of days untill it stopped to be visible for yet unknown reasons.
But i want to fix that, and when its done i offer another savefile starting in chapter 3, because there it happens.
At the beginning of the game, a shower in the afternoon used to pass the time (it didn't if you went there at noon).
Something mundane like this, taking a shower, could be made to advance the time from any time of day. Or MC could watch TV to advance time. You don't need new content to advance the time, just a mundane task like these.