| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 647 by topic |
|---|
| Leaders |
| Categories |
| Gregorian calendar | 647 DCXLVII |
| Ab urbe condita | 1400 |
| Armenian calendar | 96 ԹՎ ՂԶ |
| Assyrian calendar | 5397 |
| Balinese saka calendar | 568–569 |
| Bengali calendar | 54 |
| Berber calendar | 1597 |
| Buddhist calendar | 1191 |
| Burmese calendar | 9 |
| Byzantine calendar | 6155–6156 |
| Chinese calendar | 丙午年 (Fire Horse) 3344 or 3137 — to — 丁未年 (Fire Goat) 3345 or 3138 |
| Coptic calendar | 363–364 |
| Discordian calendar | 1813 |
| Ethiopian calendar | 639–640 |
| Hebrew calendar | 4407–4408 |
| Hindu calendars | |
| - Vikram Samvat | 703–704 |
| - Shaka Samvat | 568–569 |
| - Kali Yuga | 3747–3748 |
| Holocene calendar | 10647 |
| Iranian calendar | 25–26 |
| Islamic calendar | 26–27 |
| Japanese calendar | Taika 3 (大化３年) |
| Javanese calendar | 538–539 |
| Julian calendar | 647 DCXLVII |
| Korean calendar | 2980 |
| Minguo calendar | 1265 before ROC 民前1265年 |
| Nanakshahi calendar | −821 |
| Seleucid era | 958/959 AG |
| Thai solar calendar | 1189–1190 |
| Tibetan calendar | 阳火马年 (male Fire-Horse) 773 or 392 or −380 — to — 阴火羊年 (female Fire-Goat) 774 or 393 or −379 |
Year 647 (DCXLVII) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. The denomination 647 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.