I have read through the answers and tutorials, but can't find anything that deals with time-based progression.
This post contains a count-down. Can this be used to trigger other events? It seems like a case of 'when time=0 do y' or something, but I don't know Java or Unity well enough to write it myself.
Additionally, I don't want there to be a visual timer, but rather tie the time into a) the movement of the main light (to replicate the passing of a day) and b) into brief cutscenes for the 'night time' animation. (I'm also working on how to do 'fade to blacks' as a fall-back)
After a handful of these day cycles, I'd like it to end in another cut-scene, dependent on items found during the game.