What cartoon has been aired every October since it debuted in 1966?

Charlie Brown was never as sad as when he got a rock while trick-or-treating in "It's the Great Pumpkin, Charlie Brown." The special first aired in 1966 and has been brought back every year since. Watching it has become a tradition in many American households.

Asked by Jennifer Sinclair · Last updated 5 years ago · 20.4K views · SOURCE