877
| Years | 
|---|
| Millennium | 
| 1st millennium | 
| Centuries | 
| Decades | 
| Years | 
| 877 by topic | 
|---|
| Leaders | 
| Categories | 
| 
 | 
| Gregorian calendar | 877 DCCCLXXVII | 
| Ab urbe condita | 1630 | 
| Armenian calendar | 326 ԹՎ ՅԻԶ | 
| Assyrian calendar | 5627 | 
| Balinese saka calendar | 798–799 | 
| Bengali calendar | 283–284 | 
| Berber calendar | 1827 | 
| Buddhist calendar | 1421 | 
| Burmese calendar | 239 | 
| Byzantine calendar | 6385–6386 | 
| Chinese calendar | 丙申年 (Fire Monkey) 3574 or 3367 — to — 丁酉年 (Fire Rooster) 3575 or 3368 | 
| Coptic calendar | 593–594 | 
| Discordian calendar | 2043 | 
| Ethiopian calendar | 869–870 | 
| Hebrew calendar | 4637–4638 | 
| Hindu calendars | |
| - Vikram Samvat | 933–934 | 
| - Shaka Samvat | 798–799 | 
| - Kali Yuga | 3977–3978 | 
| Holocene calendar | 10877 | 
| Iranian calendar | 255–256 | 
| Islamic calendar | 263–264 | 
| Japanese calendar | Jōgan 19 / Gangyō 1 (元慶元年) | 
| Javanese calendar | 775–776 | 
| Julian calendar | 877 DCCCLXXVII | 
| Korean calendar | 3210 | 
| Minguo calendar | 1035 before ROC 民前1035年 | 
| Nanakshahi calendar | −591 | 
| Seleucid era | 1188/1189 AG | 
| Thai solar calendar | 1419–1420 | 
| Tibetan calendar | 阳火猴年 (male Fire-Monkey) 1003 or 622 or −150 — to — 阴火鸡年 (female Fire-Rooster) 1004 or 623 or −149 | 
Year 877 (DCCCLXXVII) was a common year starting on Tuesday of the Julian calendar.