Back 1822 Abkhazian 1822 Afrikaans 1822 ALS 1822 እ.ኤ.አ. Amharic 1822 AN 1822 Arabic 1822 ARY 1822 ARZ 1822 AST 1822 AVK
| Millennium: | 2nd millennium |
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| 1822 by topic |
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| Gregorian calendar | 1822 MDCCCXXII |
| Ab urbe condita | 2575 |
| Armenian calendar | 1271 ԹՎ ՌՄՀԱ |
| Assyrian calendar | 6572 |
| Balinese saka calendar | 1743–1744 |
| Bengali calendar | 1229 |
| Berber calendar | 2772 |
| British Regnal year | 2 Geo. 4 – 3 Geo. 4 |
| Buddhist calendar | 2366 |
| Burmese calendar | 1184 |
| Byzantine calendar | 7330–7331 |
| Chinese calendar | 辛巳年 (Metal Snake) 4519 or 4312 — to — 壬午年 (Water Horse) 4520 or 4313 |
| Coptic calendar | 1538–1539 |
| Discordian calendar | 2988 |
| Ethiopian calendar | 1814–1815 |
| Hebrew calendar | 5582–5583 |
| Hindu calendars | |
| - Vikram Samvat | 1878–1879 |
| - Shaka Samvat | 1743–1744 |
| - Kali Yuga | 4922–4923 |
| Holocene calendar | 11822 |
| Igbo calendar | 822–823 |
| Iranian calendar | 1200–1201 |
| Islamic calendar | 1237–1238 |
| Japanese calendar | Bunsei 5 (文政５年) |
| Javanese calendar | 1749–1750 |
| Julian calendar | Gregorian minus 12 days |
| Korean calendar | 4155 |
| Minguo calendar | 90 before ROC 民前90年 |
| Nanakshahi calendar | 354 |
| Thai solar calendar | 2364–2365 |
| Tibetan calendar | 阴金蛇年 (female Iron-Snake) 1948 or 1567 or 795 — to — 阳水马年 (male Water-Horse) 1949 or 1568 or 796 |
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1822 (MDCCCXXII) was a common year starting on Tuesday of the Gregorian calendar and a common year starting on Sunday of the Julian calendar, the 1822nd year of the Common Era (CE) and Anno Domini (AD) designations, the 822nd year of the 2nd millennium, the 22nd year of the 19th century, and the 3rd year of the 1820s decade. As of the start of 1822, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.