1820
| Seserre: | 14ine | 15ine | 16ine | 17ine | 18ine | 19ine | 20ine | 21ine | 22ine | 23ine | 24ine |
| Serri: | 1815 | 1816 | 1817 | 1818 | 1819 | 1820 | 1821 | 1822 | 1823 | 1824 | 1825 |
Serra teqwimi gorey reqemanê romenan ra nuştışê cı MDCCCXX aseno.
| Gregoryen | 1820 | |
| Ab Urbe | 2573 | |
| Teqwimê Ermeniyan | 1269 ԹՎ ՌՄԿԹ | |
| Asuri | 6570 | |
| Teqwimê Bahai | -24–-23 | |
| Teqwimo Bengalki | 1227 | |
| Teqwimê Berberi | 2770 | |
| İngılız | 60 Geo. 3 – 1 Geo. 4 | |
| Teqwimê Budistan | 2364 | |
| Teqwimê Myanmari | 1182 | |
| Teqwimê Bizansi | 7328–7329 | |
| Teqwimo İbranki | 5580–5581 | |
| İran | 1198–1199 | |
| Teqwimo Hıcri | 1235–1236 | |
| Teqwimê Japoni | Bunsei 3 (文政3年) | |
| Teqwimê Korya | 4153 | |
| Teqwimê Minguo | 92 before Çin 民前92年 | |
| Thai solar | 2363 | |