| Millennium: | 2nd Millennium BC |
|---|---|
| Centuries: | 20th cent. BC – 19th cent. BC – 18th cent. BC |
| Decades: | 1900s BC 1890s BC 1880s BC – 1870s BC – 1860s BC 1850s BC 1840s BC |
| Years: | 1881 BC 1880 BC 1879 BC – 1878 BC – 1877 BC 1876 BC 1875 BC |
| Gregorian calendar | 1878 MDCCCLXXVIII |
| Ab urbe condita | 2631 |
| Armenian calendar | 1327 ԹՎ ՌՅԻԷ |
| Assyrian calendar | 6628 |
| Bahá'í calendar | 34–35 |
| Bengali calendar | 1285 |
| Berber calendar | 2828 |
| British Regnal year | 41 Vict. 1 – 42 Vict. 1 |
| Buddhist calendar | 2422 |
| Burmese calendar | 1240 |
| Byzantine calendar | 7386–7387 |
| Chinese calendar | 丁丑年 (Fire Ox) 4574 or 4514 — to — 戊寅年 (Earth Tiger) 4575 or 4515 |
| Coptic calendar | 1594–1595 |
| Discordian calendar | 3044 |
| Ethiopian calendar | 1870–1871 |
| Hebrew calendar | 5638–5639 |
| Hindu calendars | |
| - Vikram Samvat | 1934–1935 |
| - Shaka Samvat | 1799–1800 |
| - Kali Yuga | 4978–4979 |
| Holocene calendar | 11878 |
| Igbo calendar | 878–879 |
| Iranian calendar | 1256–1257 |
| Islamic calendar | 1294–1296 |
| Japanese calendar | Meiji 11 (明治１１年) |
| Javanese calendar | 1806–1807 |
| Julian calendar | Gregorian minus 12 days |
| Korean calendar | 4211 |
| Minguo calendar | 34 before ROC 民前34年 |
| Nanakshahi calendar | 410 |
| Thai solar calendar | 2420–2421 |
The year 1878 BC