When does Rudolph and Frosty's Christmas in July return?

The film premiered in the US on November 25, 1979, on ABC. This was the last Rankin/Bass special to star Billie Mae Richards as Rudolph and Jackie Vernon as Frosty. Mickey Rooney reprised his role as Santa Claus from Santa Claus Is Comin' to Town and The Year Without a Santa Claus.