1645 (MDCXLV) ebile ngwaga wa go thoma ka Sontaga, ngwaga wa botshelela ngwagengsome wa 1640s, ngwaga wa bomasomenne hlano ngwagengkgolo wa Ngwagakgolo 17, le ngwaga wa bomakgolo tshela masomenne hlano ngwagengkete wa Ngwagakete 2.