Hi there,
good question.
On fishingreminder I've been combining the standard Solunar day ratings with the old Maori fishing calendar.
That's why the ratings are different to other sites for certain days in the moon cycle.
Not all days are different but often days around full moon have a lesser rating here on Fishingreminder.
I might add an option in the next update to choose a preferred ratings system.
Either the modified or standard solunar ratings.
hope that helps
cheers
a snapper a day keeps the doctor away