How often does this event occur? I am an on and off again player and came back to play and found this event. Easily one of the best things to come from Wizard101 in awhile and I wish they'd make it permanent.
With that said, Beastmoon Hunt begins the first Tuesday of every month. Beastmoon Mayhem begins the 3rd Tuesday of every month. In between the 2 Beastmoon Events is the Deckathalon. Beastmoon is far superior. We get a rotating of special events when those 3 are not going on (ie. Spiral Scene, Pet Promenade, Spiral Showcase, etc.)
