Back 1821 Abkhazian 1821 Afrikaans 1821 ALS 1821 እ.ኤ.አ. Amharic 1821 AN 1821 Arabic 1821 ARY 1821 ARZ 1821 AST 1821 AVK
| 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 |
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.