| Millennium: | 2nd millennium |
|---|---|
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| 1790 by topic |
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| Gregorian calendar | 1790 MDCCXC |
| Ab urbe condita | 2543 |
| Armenian calendar | 1239 ԹՎ ՌՄԼԹ |
| Assyrian calendar | 6540 |
| Balinese saka calendar | 1711–1712 |
| Bengali calendar | 1197 |
| Berber calendar | 2740 |
| British Regnal year | 30 Geo. 3 – 31 Geo. 3 |
| Buddhist calendar | 2334 |
| Burmese calendar | 1152 |
| Byzantine calendar | 7298–7299 |
| Chinese calendar | 己酉年 (Earth Rooster) 4487 or 4280 — to — 庚戌年 (Metal Dog) 4488 or 4281 |
| Coptic calendar | 1506–1507 |
| Discordian calendar | 2956 |
| Ethiopian calendar | 1782–1783 |
| Hebrew calendar | 5550–5551 |
| Hindu calendars | |
| - Vikram Samvat | 1846–1847 |
| - Shaka Samvat | 1711–1712 |
| - Kali Yuga | 4890–4891 |
| Holocene calendar | 11790 |
| Igbo calendar | 790–791 |
| Iranian calendar | 1168–1169 |
| Islamic calendar | 1204–1205 |
| Japanese calendar | Kansei 2 (寛政２年) |
| Javanese calendar | 1716–1717 |
| Julian calendar | Gregorian minus 11 days |
| Korean calendar | 4123 |
| Minguo calendar | 122 before ROC 民前122年 |
| Nanakshahi calendar | 322 |
| Thai solar calendar | 2332–2333 |
| Tibetan calendar | 阴土鸡年 (female Earth-Rooster) 1916 or 1535 or 763 — to — 阳金狗年 (male Iron-Dog) 1917 or 1536 or 764 |
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1790 (MDCCXC) was a common year starting on Friday of the Gregorian calendar and a common year starting on Tuesday of the Julian calendar, the 1790th year of the Common Era (CE) and Anno Domini (AD) designations, the 790th year of the 2nd millennium, the 90th year of the 18th century, and the 1st year of the 1790s decade. As of the start of 1790, the Gregorian calendar was 11 days ahead of the Julian calendar, which remained in localized use until 1923.