We made the decision to make sure we frame everything up front; where the story took place, how many weeks it was, we've got some things presented in animated timelines that at least show the progression of events that lead up to the bulk of the story. The other technique we're using are what I refer to as "way points" or little title text elements we drop in at the start of the scene to let you know the date of the event you're about to watch. The film doesn't jump around a lot, but it does enough where if you don't have these little cairns to show you where the path is, you could get lost.