| Millennium: | 2nd millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 1809 by topic |
|---|
| Humanities |
| By country |
| Other topics |
| Lists of leaders |
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| Establishments and disestablishments categories |
| Works category |
| Gregorian calendar | 1809 MDCCCIX |
| Ab urbe condita | 2562 |
| Armenian calendar | 1258 ԹՎ ՌՄԾԸ |
| Assyrian calendar | 6559 |
| Balinese saka calendar | 1730–1731 |
| Bengali calendar | 1216 |
| Berber calendar | 2759 |
| British Regnal year | 49 Geo. 3 – 50 Geo. 3 |
| Buddhist calendar | 2353 |
| Burmese calendar | 1171 |
| Byzantine calendar | 7317–7318 |
| Chinese calendar | 戊辰年 (Earth Dragon) 4506 or 4299 — to — 己巳年 (Earth Snake) 4507 or 4300 |
| Coptic calendar | 1525–1526 |
| Discordian calendar | 2975 |
| Ethiopian calendar | 1801–1802 |
| Hebrew calendar | 5569–5570 |
| Hindu calendars | |
| - Vikram Samvat | 1865–1866 |
| - Shaka Samvat | 1730–1731 |
| - Kali Yuga | 4909–4910 |
| Holocene calendar | 11809 |
| Igbo calendar | 809–810 |
| Iranian calendar | 1187–1188 |
| Islamic calendar | 1223–1224 |
| Japanese calendar | Bunka 6 (文化６年) |
| Javanese calendar | 1735–1736 |
| Julian calendar | Gregorian minus 12 days |
| Korean calendar | 4142 |
| Minguo calendar | 103 before ROC 民前103年 |
| Nanakshahi calendar | 341 |
| Thai solar calendar | 2351–2352 |
| Tibetan calendar | 阳土龙年 (male Earth-Dragon) 1935 or 1554 or 782 — to — 阴土蛇年 (female Earth-Snake) 1936 or 1555 or 783 |
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1809 (MDCCCIX) was a common year starting on Sunday of the Gregorian calendar and a common year starting on Friday of the Julian calendar, the 1809th year of the Common Era (CE) and Anno Domini (AD) designations, the 809th year of the 2nd millennium, the 9th year of the 19th century, and the 10th and last year of the 1800s decade. As of the start of 1809, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.