If you are a full or part-time single parent, you are unavailable. Or you might be climbing or hiking in mountains, padding a river... If you have to be called

If you are a full or part-time single parent, you are unavailable. Or you might be climbing or hiking in mountains, padding a river... If you have to be called at 3am (and it's happened to me more than once), the workday is completed when the problem is fixed. A smart employer does not want you to come in during the normal workday and doing something stupid, or get in an accident driving.