Hi desertglow,

On FR we have the best day ratings during new moon periods.
Personally I hardly ever experience really good fishing during full moon. It's seems better a few days before the full moon.

My theory is that on full moon nights most predators can see enough to be feeding throughout the night and then you get less chances of a bite during the day. In other words the feeding periods are stretched out longer than on new moon days.

You'll still catch fish on poor days. The major and minor times are more important than the day rating.
It also depends of course a lot on the weather patterns. But our day ratings are mainly based on the Solunar Theory and the old Maori fishing calendar. I'm thinking of including weather patterns into the day ratings as well but haven't gotten around doing that yet.

cheers