Poohrennial, hmm.

Wiktionary: 1644, from Latin perennis ‎(“lasting through the whole year”), from per- ‎(“through”) + annus ‎(“year”).

So, Pooh- ("Pertaining to Pooh")...

Poohrennial philosophy: The notion that the Earth's cosmic orbit is maintained and manifested in an anthropomorphic toy bear.

I can get behind that.