(US, Canada, rather formal). A polite parting during daytime.
Thank you. Have a nice day.
Used other than figuratively or idiomatically: see have, a, nice, day.
Source: en.wiktionary.orgThank you, have a nice day. I will now see the president of Azerbaijan, so the nice part of the day is over. Jean-Claude Juncker
In five billion years, the sun will expand and engulf our orbit as the charred ember that was once Earth vaporizes. Have a nice day. Neil deGrasse Tyson
NME 's review called Have a Nice Day ". Source: Internet
When his party left, everyone else remarked on the fine weather and expressed variations of “Have a nice day.” Source: Internet