| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 671 by topic |
|---|
| Leaders |
| Categories |
| Gregorian calendar | 671 DCLXXI |
| Ab urbe condita | 1424 |
| Armenian calendar | 120 ԹՎ ՃԻ |
| Assyrian calendar | 5421 |
| Balinese saka calendar | 592–593 |
| Bengali calendar | 78 |
| Berber calendar | 1621 |
| Buddhist calendar | 1215 |
| Burmese calendar | 33 |
| Byzantine calendar | 6179–6180 |
| Chinese calendar | 庚午年 (Metal Horse) 3368 or 3161 — to — 辛未年 (Metal Goat) 3369 or 3162 |
| Coptic calendar | 387–388 |
| Discordian calendar | 1837 |
| Ethiopian calendar | 663–664 |
| Hebrew calendar | 4431–4432 |
| Hindu calendars | |
| - Vikram Samvat | 727–728 |
| - Shaka Samvat | 592–593 |
| - Kali Yuga | 3771–3772 |
| Holocene calendar | 10671 |
| Iranian calendar | 49–50 |
| Islamic calendar | 50–51 |
| Japanese calendar | Hakuchi 22 (白雉２２年) |
| Javanese calendar | 562–563 |
| Julian calendar | 671 DCLXXI |
| Korean calendar | 3004 |
| Minguo calendar | 1241 before ROC 民前1241年 |
| Nanakshahi calendar | −797 |
| Seleucid era | 982/983 AG |
| Thai solar calendar | 1213–1214 |
| Tibetan calendar | 阳金马年 (male Iron-Horse) 797 or 416 or −356 — to — 阴金羊年 (female Iron-Goat) 798 or 417 or −355 |
Year 671 (DCLXXI) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar. The denomination 671 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.