| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| Gregorian calendar | 877 DCCCLXXVII |
| Ab urbe condita | 1630 |
| Armenian calendar | 326 ԹՎ ՅԻԶ |
| Assyrian calendar | 5627 |
| Bengali calendar | 284 |
| Berber calendar | 1827 |
| Buddhist calendar | 1421 |
| Burmese calendar | 239 |
| Byzantine calendar | 6385–6386 |
| Chinese calendar |
丙申年 (Fire Monkey) 3573 or 3513 — to — 丁酉年 (Fire Rooster) 3574 or 3514 |
| 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 |
Year 877 (DCCCLXXVII) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar.