| Millennium: | 2nd Millennium BC |
|---|---|
| Centuries: | 20th cent. BC – 19th cent. BC – 18th cent. BC |
| Decades: | 1850s BC 1840s BC 1830s BC – 1820s BC – 1810s BC 1800s BC 1790s BC |
| Years: | 1830 BC 1829 BC 1828 BC – 1827 BC – 1826 BC 1825 BC 1824 BC |
| Gregorian calendar | 1827 MDCCCXXVII |
| Ab urbe condita | 2580 |
| Armenian calendar | 1276 ԹՎ ՌՄՀԶ |
| Assyrian calendar | 6577 |
| Bengali calendar | 1234 |
| Berber calendar | 2777 |
| British Regnal year | 7 Geo. 4 – 8 Geo. 4 |
| Buddhist calendar | 2371 |
| Burmese calendar | 1189 |
| Byzantine calendar | 7335–7336 |
| Chinese calendar | 丙戌年 (Fire Dog) 4523 or 4463 — to — 丁亥年 (Fire Pig) 4524 or 4464 |
| Coptic calendar | 1543–1544 |
| Discordian calendar | 2993 |
| Ethiopian calendar | 1819–1820 |
| Hebrew calendar | 5587–5588 |
| Hindu calendars | |
| - Vikram Samvat | 1883–1884 |
| - Shaka Samvat | 1748–1749 |
| - Kali Yuga | 4927–4928 |
| Holocene calendar | 11827 |
| Igbo calendar | 827–828 |
| Iranian calendar | 1205–1206 |
| Islamic calendar | 1242–1243 |
| Japanese calendar | Bunsei 10 (文政１０年) |
| Javanese calendar | 1754–1755 |
| Julian calendar | Gregorian minus 12 days |
| Korean calendar | 4160 |
| Minguo calendar | 85 before ROC 民前85年 |
| Nanakshahi calendar | 359 |
| Thai solar calendar | 2369–2370 |
The year 1827 BC