1821

1821 (MDCCCXXI) ebile ngwaga wa go thoma ka Mošupologo, ngwaga wa bobedi ngwagengsome wa 1820s, ngwaga wa bomasomepedi tee ngwagengkgolo wa Ngwagakgolo 19, le ngwaga wa bomakgolo seswai masomepedi tee ngwagengkete wa Ngwagakete 2.

Ngwagakete:	Ngwagakete 2
Mengwagakgolo:	Ngwagakgolo 18 – Ngwagakgolo 19 – Ngwagakgolo 20
Mengwagasome:	1790s  1800s  1810s  – 1820s –  1830s  1840s  1850s
Mengwaga:	1818 1819 1820 – 1821 – 1822 1823 1824