663
| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| Gregorian calendar | 663 DCLXIII |
| Ab urbe condita | 1416 |
| Armenian calendar | 112 ԹՎ ՃԺԲ |
| Assyrian calendar | 5413 |
| Balinese saka calendar | 584–585 |
| Bengali calendar | 70 |
| Berber calendar | 1613 |
| Buddhist calendar | 1207 |
| Burmese calendar | 25 |
| Byzantine calendar | 6171–6172 |
| Chinese calendar |
壬戌年 (Water Dog) 3359 or 3299 — to — 癸亥年 (Water Pig) 3360 or 3300 |
| Coptic calendar | 379–380 |
| Discordian calendar | 1829 |
| Ethiopian calendar | 655–656 |
| Hebrew calendar | 4423–4424 |
| Hindu calendars | |
| - Vikram Samvat | 719–720 |
| - Shaka Samvat | 584–585 |
| - Kali Yuga | 3763–3764 |
| Holocene calendar | 10663 |
| Iranian calendar | 41–42 |
| Islamic calendar | 42–43 |
| Japanese calendar | N/A |
| Javanese calendar | 554–555 |
| Julian calendar | 663 DCLXIII |
| Korean calendar | 2996 |
| Minguo calendar | 1249 before ROC 民前1249年 |
| Nanakshahi calendar | −805 |
| Seleucid era | 974/975 AG |
| Thai solar calendar | 1205–1206 |
Year 663 (DCLXIII) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar. The denomination 663 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.
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