Originally Posted by absolmorph
Isn't the method of calculating an ability's save given with the ability?
I'm looking at Scary Costume.
Also, are the bonuses year-round?
Hmm.... I believe there is a standard calculation for that in the description of Frightful Presence, but I'll have to double-check
And yes, the feats apply year-round. However, I'm tinkering with the idea that there should be no limits on the use of the abilities on the actual holiday.
Didn't quite get your questions, so I hope I answered satisfactorily.