Births
- May 3 – Constantine III, Byzantine emperor (d. 641)
- Germanus of Granfelden, Frankish abbot (approximate date)
- Oswiu, king of Northumbria (approximate date)
| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 612 by topic |
|---|
| Leaders |
| Categories |
| Gregorian calendar | 612 DCXII |
| Ab urbe condita | 1365 |
| Armenian calendar | 61 ԹՎ ԿԱ |
| Assyrian calendar | 5362 |
| Balinese saka calendar | 533–534 |
| Bengali calendar | 19 |
| Berber calendar | 1562 |
| Buddhist calendar | 1156 |
| Burmese calendar | −26 |
| Byzantine calendar | 6120–6121 |
| Chinese calendar | 辛未年 (Metal Goat) 3309 or 3102 — to — 壬申年 (Water Monkey) 3310 or 3103 |
| Coptic calendar | 328–329 |
| Discordian calendar | 1778 |
| Ethiopian calendar | 604–605 |
| Hebrew calendar | 4372–4373 |
| Hindu calendars | |
| - Vikram Samvat | 668–669 |
| - Shaka Samvat | 533–534 |
| - Kali Yuga | 3712–3713 |
| Holocene calendar | 10612 |
| Iranian calendar | 10 BP – 9 BP |
| Islamic calendar | 10 BH – 9 BH |
| Japanese calendar | N/A |
| Javanese calendar | 502–503 |
| Julian calendar | 612 DCXII |
| Korean calendar | 2945 |
| Minguo calendar | 1300 before ROC 民前1300年 |
| Nanakshahi calendar | −856 |
| Seleucid era | 923/924 AG |
| Thai solar calendar | 1154–1155 |
| Tibetan calendar | 阴金羊年 (female Iron-Goat) 738 or 357 or −415 — to — 阳水猴年 (male Water-Monkey) 739 or 358 or −414 |
Year 612 (DCXII) was a leap year starting on Saturday (link will display the full calendar) of the Julian calendar. The denomination 612 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.