Admittedly, this more speaks to the relative nature of experiencing time, but it also speaks to the cultural understanding of a year. It is right in the sweet spot where it feels like a long time (because seriously try to think how many things have happened since January 2013), but it also feels like the blink of an eye (because even though I've moved to a new state, started a new job, and had dozens of other life-changing experiences, it feels like a hell of a lot longer than a year since I lived in Buffalo and had my old jobs [which makes getting my W2's a bizarre and confusing experience]).
When you write about time, especially the passage of time, be conscientious of it. Should a year ago feel long or short? How do you create that ambiance and make the audience feel the proper flow of time? Master this step, and you will have an invaluable skill for all of your writing.