Look at this Ice Cream Van in the picture (click on picture to enlarge); painted on the back are the words “HAVE A ICE DAY”.
It seems to me that the message the ice cream sellers want to get across is “Have a nice day”, with the implication that an ice cream might help in that aim. They seem to have wanted to somehow merge “ice cream” and “nice day” — maybe using some wit — perhaps a pun? They must have scratched their heads and rubbed their chins for ages in deep thought on this one. The obvious solution to most people would probably have been this:
HAVE A NICE DAY
HAVE AN ICE DAY
In other words, simply moving the space makes the perfect pun — an elegant wordplay, the two phrases sounding almost the same, merely the accent or stress moving from nice to ice. Sublime.
HAVE A ICE DAY
— Which sounds like a machine gun stutter at best! Yes, things are certainly getting worse! Children see this everyday, so it’s no wonder standards are slipping!