Year 712 (DCCXII) was a leap year starting on Friday (link will display the full calendar) of the Julian calendar, the 712th year of the Common Era (CE) and Anno Domini (AD) designations, the 712th year of the 1st millennium, the 12th year of the 8th century, and the 3rd year of the 710s decade. The denomination 712 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.
| Millennium: | 1st millennium |
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| Centuries: |
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| Decades: |
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| Years: |
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| Gregorian calendar | 712 DCCXII |
| Ab urbe condita | 1465 |
| Armenian calendar | 161 ԹՎ ՃԿԱ |
| Assyrian calendar | 5462 |
| Balinese saka calendar | 633–634 |
| Bengali calendar | 119 |
| Berber calendar | 1662 |
| Buddhist calendar | 1256 |
| Burmese calendar | 74 |
| Byzantine calendar | 6220–6221 |
| Chinese calendar | 辛亥年 (Metal Pig) 3409 or 3202 — to — 壬子年 (Water Rat) 3410 or 3203 |
| Coptic calendar | 428–429 |
| Discordian calendar | 1878 |
| Ethiopian calendar | 704–705 |
| Hebrew calendar | 4472–4473 |
| Hindu calendars | |
| - Vikram Samvat | 768–769 |
| - Shaka Samvat | 633–634 |
| - Kali Yuga | 3812–3813 |
| Holocene calendar | 10712 |
| Iranian calendar | 90–91 |
| Islamic calendar | 93–94 |
| Japanese calendar | Wadō5 (和銅5年) |
| Javanese calendar | 605–606 |
| Julian calendar | 712 DCCXII |
| Korean calendar | 3045 |
| Minguo calendar | 1200 before ROC 民前1200年 |
| Nanakshahi calendar | −756 |
| Seleucid era | 1023/1024 AG |
| Thai solar calendar | 1254–1255 |
| Tibetan calendar | 阴金猪年 (female Iron-Pig) 838 or 457 or −315 — to — 阳水鼠年 (male Water-Rat) 839 or 458 or −314 |
