| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 731 by topic |
|---|
| Leaders |
| Categories |
| Gregorian calendar | 731 DCCXXXI |
| Ab urbe condita | 1484 |
| Armenian calendar | 180 ԹՎ ՃՁ |
| Assyrian calendar | 5481 |
| Balinese saka calendar | 652–653 |
| Bengali calendar | 138 |
| Berber calendar | 1681 |
| Buddhist calendar | 1275 |
| Burmese calendar | 93 |
| Byzantine calendar | 6239–6240 |
| Chinese calendar | 庚午年 (Metal Horse) 3428 or 3221 — to — 辛未年 (Metal Goat) 3429 or 3222 |
| Coptic calendar | 447–448 |
| Discordian calendar | 1897 |
| Ethiopian calendar | 723–724 |
| Hebrew calendar | 4491–4492 |
| Hindu calendars | |
| - Vikram Samvat | 787–788 |
| - Shaka Samvat | 652–653 |
| - Kali Yuga | 3831–3832 |
| Holocene calendar | 10731 |
| Iranian calendar | 109–110 |
| Islamic calendar | 112–113 |
| Japanese calendar | Tenpyō 3 (天平３年) |
| Javanese calendar | 624–625 |
| Julian calendar | 731 DCCXXXI |
| Korean calendar | 3064 |
| Minguo calendar | 1181 before ROC 民前1181年 |
| Nanakshahi calendar | −737 |
| Seleucid era | 1042/1043 AG |
| Thai solar calendar | 1273–1274 |
| Tibetan calendar | 阳金马年 (male Iron-Horse) 857 or 476 or −296 — to — 阴金羊年 (female Iron-Goat) 858 or 477 or −295 |
Year 731 (DCCXXXI) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. The denomination 731 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.