| Millennium: | 2nd millennium |
|---|---|
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| 1813 by topic |
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| Humanities |
| By country |
| Other topics |
| Lists of leaders |
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| Works category |
| Gregorian calendar | 1813 MDCCCXIII |
| Ab urbe condita | 2566 |
| Armenian calendar | 1262 ԹՎ ՌՄԿԲ |
| Assyrian calendar | 6563 |
| Balinese saka calendar | 1734–1735 |
| Bengali calendar | 1220 |
| Berber calendar | 2763 |
| British Regnal year | 53 Geo. 3 – 54 Geo. 3 |
| Buddhist calendar | 2357 |
| Burmese calendar | 1175 |
| Byzantine calendar | 7321–7322 |
| Chinese calendar | 壬申年 (Water Monkey) 4510 or 4303 — to — 癸酉年 (Water Rooster) 4511 or 4304 |
| Coptic calendar | 1529–1530 |
| Discordian calendar | 2979 |
| Ethiopian calendar | 1805–1806 |
| Hebrew calendar | 5573–5574 |
| Hindu calendars | |
| - Vikram Samvat | 1869–1870 |
| - Shaka Samvat | 1734–1735 |
| - Kali Yuga | 4913–4914 |
| Holocene calendar | 11813 |
| Igbo calendar | 813–814 |
| Iranian calendar | 1191–1192 |
| Islamic calendar | 1227–1229 |
| Japanese calendar | Bunka 10 (文化１０年) |
| Javanese calendar | 1739–1740 |
| Julian calendar | Gregorian minus 12 days |
| Korean calendar | 4146 |
| Minguo calendar | 99 before ROC 民前99年 |
| Nanakshahi calendar | 345 |
| Thai solar calendar | 2355–2356 |
| Tibetan calendar | 阳水猴年 (male Water-Monkey) 1939 or 1558 or 786 — to — 阴水鸡年 (female Water-Rooster) 1940 or 1559 or 787 |
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1813 (MDCCCXIII) was a common year starting on Friday of the Gregorian calendar and a common year starting on Wednesday of the Julian calendar, the 1813th year of the Common Era (CE) and Anno Domini (AD) designations, the 813th year of the 2nd millennium, the 13th year of the 19th century, and the 4th year of the 1810s decade. As of the start of 1813, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.