And there's another thing calculated to drive a man out of the agora: it's the practice, that has somehow come into our lives, of greeting people by saying "have a happy day." I don't for the life of me see the advantage in this. Nobody in a painful situation is any the better for being told to "have a happy day."
Libanius (4th century AD), Declamations 26.7 (tr. D.A. Russell)