I think that your carb rotation should focus on your fitness plan and goals.... but that is just me (a weight room addict) ha
I'd shoot more for 2 days. A lot of people do this with fasting. One major benefit is metabolic flexibility. You're exposing your body to different fuel sources and forcing it to utilize them.
The only caveat to trying this would be try to not make it a 5 days on, 2 days off thing, routinely. Randomize it.
Maybe to slowly introduce your digestive system to constipation.
I think that one day would just be very tough since your body is so used to running on carbs/glucose. I don't see any benefit is you are having moderate carbs all other days.
Kiefer's carb nite does the mirror of that (low carb 6 days and more carbs 1 day):