| Millennium: | 2nd millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 1823 by topic |
|---|
| Humanities |
| By country |
| Other topics |
| Lists of leaders |
| Birth and death categories |
| Establishments and disestablishments categories |
| Works category |
| Gregorian calendar | 1823 MDCCCXXIII |
| Ab urbe condita | 2576 |
| Armenian calendar | 1272 ԹՎ ՌՄՀԲ |
| Assyrian calendar | 6573 |
| Balinese saka calendar | 1744–1745 |
| Bengali calendar | 1230 |
| Berber calendar | 2773 |
| British Regnal year | 3 Geo. 4 – 4 Geo. 4 |
| Buddhist calendar | 2367 |
| Burmese calendar | 1185 |
| Byzantine calendar | 7331–7332 |
| Chinese calendar | 壬午年 (Water Horse) 4520 or 4313 — to — 癸未年 (Water Goat) 4521 or 4314 |
| Coptic calendar | 1539–1540 |
| Discordian calendar | 2989 |
| Ethiopian calendar | 1815–1816 |
| Hebrew calendar | 5583–5584 |
| Hindu calendars | |
| - Vikram Samvat | 1879–1880 |
| - Shaka Samvat | 1744–1745 |
| - Kali Yuga | 4923–4924 |
| Holocene calendar | 11823 |
| Igbo calendar | 823–824 |
| Iranian calendar | 1201–1202 |
| Islamic calendar | 1238–1239 |
| Japanese calendar | Bunsei 6 (文政６年) |
| Javanese calendar | 1750–1751 |
| Julian calendar | Gregorian minus 12 days |
| Korean calendar | 4156 |
| Minguo calendar | 89 before ROC 民前89年 |
| Nanakshahi calendar | 355 |
| Thai solar calendar | 2365–2366 |
| Tibetan calendar | 阳水马年 (male Water-Horse) 1949 or 1568 or 796 — to — 阴水羊年 (female Water-Goat) 1950 or 1569 or 797 |
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1823 (MDCCCXXIII) was a common year starting on Wednesday of the Gregorian calendar and a common year starting on Monday of the Julian calendar, the 1823rd year of the Common Era (CE) and Anno Domini (AD) designations, the 823rd year of the 2nd millennium, the 23rd year of the 19th century, and the 4th year of the 1820s decade. As of the start of 1823, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.