1840s
1840s ke ngwagasome tšhupamabakeng ya Gregorian wa go thoma ka 1 Pherekgong 1840 ya fela ka 31 Manthole 1849. Ngwagasome 1840s o wela ngwagengkgolo wa 19.
| Ngwagakete: | Ngwagakete 2 |
| Mengwagakgolo: | Ngwagakgolo 18 – Ngwagakgolo 19 – Ngwagakgolo 20 |
| Mengwagasome: | 1810s 1820s 1830s – 1840s – 1850s 1860s 1870s |
| Mengwaga: | 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 |
| 1840s-tšago tswalanya: |