Kwanzaa was also invented in 1966, by Ron Karenga (aka Dr. Maulana Ron Karenga).
Both equally worthy of derision, but Festivus is at least funny. Must have been something in the air or water back in 1966.
Lots of psychedelic drug use and pop psychology in 1966.
Just way to self analyze and FEEEEEL goood, by getting it off one's chest. Ought to make for a nice happy warm family holiday.