1978 (MCMLXXVIII) ebile ngwaga wa go thoma ka Sontaga, ngwaga wa bosenyane ngwagengsome wa 1970s, ngwaga wa bomasomešupa seswai ngwagengkgolo wa Ngwagakgolo 20, le ngwaga wa bomakgolo senyane masomešupa seswai ngwagengkete wa Ngwagakete 2.