When was rad first used to mean good?

The term "rad," short for "radical," began to be used in the 1980s to mean "good" or "Excellent," particularly within youth culture and among skateboarders and surfers. Its popularity surged in the context of the punk and skate scenes, reflecting a sense of rebellion and excitement. The Word has since persisted in various forms of slang, often associated with a sense of enthusiasm or approval.