1921 (MCMXXI) ebile ngwaga wa go thoma ka Mokibelo, ngwaga wa bobedi ngwagengsome wa 1920s, ngwaga wa bomasomepedi tee ngwagengkgolo wa Ngwagakgolo 20, le ngwaga wa bomakgolo senyane masomepedi tee ngwagengkete wa Ngwagakete 2.