671 (DCLXXI) ebile ngwaga wa go thoma ka Sontaga, ngwaga wa bobedi ngwagengsome wa 670s, ngwaga wa bomasomešupa tee ngwagengkgolo wa Ngwagakgolo 7, le ngwaga wa bomakgolo tshela masomešupa tee ngwagengkete wa Ngwagakete 1.