 The phrase "have a nice day" is typically spoken by service employees or clerks to customers at the end of a transaction. A mercantile method of expressing "thank you" as in "thank you for shopping with us" or "thank you for using our service", it is commonly used among people in the United States and by retailers in New Zealand and elsewhere. In the 1970s, the American supermarket chain Kmart opened a store in Brisbane, Australia. The workers were trained to say, "Thank you for shopping at K-Mart. Have a nice day."
