1120s ke ngwagasome tšhupamabakeng ya Gregorian wa go thoma ka 1 Pherekgong 1120 ya fela ka 31 Manthole 1129. Ngwagasome 1120s o wela ngwagengkgolo wa 12.
| Ngwagakete: | Ngwagakete 2 |
| Mengwagakgolo: | Ngwagakgolo 11 – Ngwagakgolo 12 – Ngwagakgolo 13 |
| Mengwagasome: | 1090s 1100s 1110s – 1120s – 1130s 1140s 1150s |
| Mengwaga: | 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 |
| 1120s-tšago tswalanya: |