They are correctly listing the month first.
You say the day first, the person listening has exactly 0 idea what the hell you're talking about until you get to the month.
You say the month first, and they understand, and can form an understanding of your whole message faster than if you made them wait by saying the day first.
"When are you getting married?"
"Twenty-second of February"
^ until February was said, the listener could glean nothing of value at all from the speaker.
Any retort must include logic or don't bother.
Isn't this just the premise of the film The Point