Structure your story
How to structure your story is really up to you. Your story could be arranged in years, in seasons, on a significant day each year e.g. Christmas seasons, each generation or what is appropriate for you and your story. Recently, I structured a book according to the houses the client had lived in. This sounded a little odd at first, but as I made progress on the book, I realised this was a great way to tell this particular story.