| Millennium: | 2nd millennium |
|---|---|
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| 1787 by topic |
|---|
| Arts and science |
| Countries |
| Lists of leaders |
| Birth and death categories |
| Establishments and disestablishments categories |
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| Gregorian calendar | 1787 MDCCLXXXVII |
| Ab urbe condita | 2540 |
| Armenian calendar | 1236 ԹՎ ՌՄԼԶ |
| Assyrian calendar | 6537 |
| Balinese saka calendar | 1708–1709 |
| Bengali calendar | 1194 |
| Berber calendar | 2737 |
| British Regnal year | 27 Geo. 3 – 28 Geo. 3 |
| Buddhist calendar | 2331 |
| Burmese calendar | 1149 |
| Byzantine calendar | 7295–7296 |
| Chinese calendar | 丙午年 (Fire Horse) 4484 or 4277 — to — 丁未年 (Fire Goat) 4485 or 4278 |
| Coptic calendar | 1503–1504 |
| Discordian calendar | 2953 |
| Ethiopian calendar | 1779–1780 |
| Hebrew calendar | 5547–5548 |
| Hindu calendars | |
| - Vikram Samvat | 1843–1844 |
| - Shaka Samvat | 1708–1709 |
| - Kali Yuga | 4887–4888 |
| Holocene calendar | 11787 |
| Igbo calendar | 787–788 |
| Iranian calendar | 1165–1166 |
| Islamic calendar | 1201–1202 |
| Japanese calendar | Tenmei 7 (天明７年) |
| Javanese calendar | 1713–1714 |
| Julian calendar | Gregorian minus 11 days |
| Korean calendar | 4120 |
| Minguo calendar | 125 before ROC 民前125年 |
| Nanakshahi calendar | 319 |
| Thai solar calendar | 2329–2330 |
| Tibetan calendar | 阳火马年 (male Fire-Horse) 1913 or 1532 or 760 — to — 阴火羊年 (female Fire-Goat) 1914 or 1533 or 761 |
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1787 (MDCCLXXXVII) was a common year starting on Monday of the Gregorian calendar and a common year starting on Friday of the Julian calendar, the 1787th year of the Common Era (CE) and Anno Domini (AD) designations, the 787th year of the 2nd millennium, the 87th year of the 18th century, and the 8th year of the 1780s decade. As of the start of 1787, the Gregorian calendar was 11 days ahead of the Julian calendar, which remained in localized use until 1923.