When does You're the Greatest, Charlie Brown return?

You're the Greatest, Charlie Brown is the 18th prime-time animated TV special based upon the comic strip Peanuts. It originally aired on the CBS network on March 19, 1979, making it the last Peanuts TV special of the 1970s. Charlie Brown decides to enter the Junior Olympics at his school after it is revealed he and his family are not going on vacation after all.