Like having a 'no smoking day' there ought to be a compulsory be nice to everbody day or week, you would probably need a week rather than a day to feel the knock-on benefits. It would be great for the work place and schools and sense of well-being in general and not too close to Christmas either. Some people say they wish that people could be as nice to each other all year round as they are at Christmas and that would be a chance to put that into practice.