1820s
1820s ke ngwagasome tšhupamabakeng ya Gregorian wa go thoma ka 1 Pherekgong 1820 ya fela ka 31 Manthole 1829. Ngwagasome 1820s o wela ngwagengkgolo wa 19.
| Ngwagakete: | Ngwagakete 2 |
| Mengwagakgolo: | Ngwagakgolo 18 – Ngwagakgolo 19 – Ngwagakgolo 20 |
| Mengwagasome: | 1790s 1800s 1810s – 1820s – 1830s 1840s 1850s |
| Mengwaga: | 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 |
| 1820s-tšago tswalanya: |