have a nice day

• Audio (Southern England):

  (file)

have a nice day

1. (US, Canada, rather formal). A polite parting during daytime.

   Thank you. Have a nice day.

   • 1986, John Hughes, Ferris Bueller's Day Off, spoken by Ferris Bueller (Matthew Broderick):

     You can reach my parents at their places of business. Thank you for stopping by. I appreciate your concern for my well-being. Have a nice day!

2. Used other than figuratively or idiomatically: see have,‎ a,‎ nice,‎ day.
   • 2011, Josh Linkner, Disciplined Dreaming, page 99:

     "Oh great, dear; have a nice day at the playground."

• Rarely used as a parting with friends or family.
• Have a nice day is a commonly spoken valediction, typically spoken by service employees or clerks to customers at the end of a transaction, particularly in North America. This repetitious and dutifully polite usage has resulted in the phrase developing a cultural connotation as a stereotypical display of impersonality, disinterest, or even passive-aggressive behavior.

• (informal, familiar) bye, see you later, see ya, have a good one
• (formal) good morning, good afternoon
• (short text, informal) HAND

• have a nice day syndrome