You don't really need us to tell you this, but now there's proof for what you've always known: Mondays are the worst day of the week. According to a new study, one in three people hate Mondays the most and on average people spend 30 minutes complaining every Monday (as compared to 22 minutes on other days). So now you really can say, "Why, yes, I do in fact have a case of the Mondays" ...