677 (DCLXXVII) ebile ngwaga wa go thoma ka Mošupologo, ngwaga wa boseswai ngwagengsome wa 670s, ngwaga wa bomasomešupa šupa ngwagengkgolo wa Ngwagakgolo 7, le ngwaga wa bomakgolo tshela masomešupa šupa ngwagengkete wa Ngwagakete 1.