on Helping Writers become Authors:
The passage of time in a story is, in some ways, what fiction is all about. But for most authors in most stories, the passage of time won’t necessarily be an explicit consideration.
If I asked you right now how much time passes in your latest story, would you know off the top of your head? Some of you will, particularly if your character is under a deadline of some sort.
But for many of us, if we know at all, we either have to consult our notes or tally it up on our fingers. The story, as they say, simply takes as long as it takes.