Now that it’s 2 am Sunday on time-change day, it’s really 1 am, so it’ll be 2 am again in an hour. Anyway, here we are joining the chorus of fall-back reminders, with the smoke-detector add-on: Change those batteries. Even if you have an ultravigilant smoke detector like ours, which thinks every roast is an inferno, it still needs functioning batteries to save your life. Go change ’em.