Honestly? No. Any impact it would have on your body would be practically unnoticeable.
Allow me to lay out some examples for you, so it's easier to understand. Let's say you eat super healthy six days a week, and then binge eat junk food one day. Is that one day going to make you fat? Of course not. The same goes for the other way around. If you eat an average/unhealthy diet six days a week, and then one day you do OMAD, it's not going to help you lose weight or maintain good health.
If you're only modifying your diet one day a week, then you'd be better off simply doing a total, 24 hour fast that one day.