Ever since the early ‘50s beginnings of “Peanuts,” creator Charles Schulz feathered his beloved comic strip with anonymous birds that popped in with mischievous, chirping whimsy. Yet it was two decades until a winged “Peanuts” creature finally got a name, becoming a fully nested character. On June 22, 1970, Schulz officially christened Snoopy’s little yellow friend Woodstock, naming him for the massive counterculture music festival that was staged on the farm in Bethel, N.Y. Something about the generational rise of a new youth culture, rather fascinated Schulz.