@ergomeh@The_Tim A comment from @jeffreywsnyder below says it DOES display US-style month/date. Very likely the Amazon buyers who complained in reviews didn’t know how to change the setting. It wouldn’t be the first time there are low reviews by people not understanding how to correctly use what they bought.
I don’t have this clock, but from many other clock devices there is usually a “set” button you have to hold to get into setting mode, and then each time you press it again you access a different setting. There is usually one setting where you can swap the month/date format. It’s not obvious if you have never set something like that before, or don’t read the instructions.