Ladybug--7-3-12 reminded me that the seasons changing might surprise you with thoughts of smoking. If you have quit in the past two years (and sometimes even if it's been longer), you might be surprised by a random thought that you want to smoke. You have to get through two years of seasons changing, holidays, family gatherings and celebrations. You don't yet have a lot of practice relearning these events as an ex-smoker, so it stands to reason you might think about smoking when you experience them.
Be prepared, not alarmed! Perfectly normal in the course of your quit. Just a shake of the head and maybe a deep breath is all that is required to stay quit for the long haul.