 The 1991 film My Own Private Idaho ironically ends with the parting phrase " have a nice day " , which for the fourth time invokes the smiley face . Smiley faces represent optimism and appear to ask the characters , who are characterized as " marginal figures " , how nice their days are . While traveling to Idaho , the protagonists ' motorcycle breaks down , and one of the characters , Mike , gazes at the sun on the horizon and links it with the motto " have a nice day " . He says , " I 've been on this road before . Looks like a fucked @-@ up face . Like it 's saying ' have a nice day ' or something . " 
