871
| Years | 
|---|
| Millennium | 
| 1st millennium | 
| Centuries | 
| Decades | 
| Years | 
| 871 by topic | 
|---|
| Leaders | 
| Categories | 
| 
 | 
| Gregorian calendar | 871 DCCCLXXI | 
| Ab urbe condita | 1624 | 
| Armenian calendar | 320 ԹՎ ՅԻ | 
| Assyrian calendar | 5621 | 
| Balinese saka calendar | 792–793 | 
| Bengali calendar | 277–278 | 
| Berber calendar | 1821 | 
| Buddhist calendar | 1415 | 
| Burmese calendar | 233 | 
| Byzantine calendar | 6379–6380 | 
| Chinese calendar | 庚寅年 (Metal Tiger) 3568 or 3361 — to — 辛卯年 (Metal Rabbit) 3569 or 3362 | 
| Coptic calendar | 587–588 | 
| Discordian calendar | 2037 | 
| Ethiopian calendar | 863–864 | 
| Hebrew calendar | 4631–4632 | 
| Hindu calendars | |
| - Vikram Samvat | 927–928 | 
| - Shaka Samvat | 792–793 | 
| - Kali Yuga | 3971–3972 | 
| Holocene calendar | 10871 | 
| Iranian calendar | 249–250 | 
| Islamic calendar | 257–258 | 
| Japanese calendar | Jōgan 13 (貞観13年) | 
| Javanese calendar | 768–770 | 
| Julian calendar | 871 DCCCLXXI | 
| Korean calendar | 3204 | 
| Minguo calendar | 1041 before ROC 民前1041年 | 
| Nanakshahi calendar | −597 | 
| Seleucid era | 1182/1183 AG | 
| Thai solar calendar | 1413–1414 | 
| Tibetan calendar | 阳金虎年 (male Iron-Tiger) 997 or 616 or −156 — to — 阴金兔年 (female Iron-Rabbit) 998 or 617 or −155 | 
Year 871 (DCCCLXXI) was a common year starting on Monday of the Julian calendar.