| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 823 by topic |
|---|
| Leaders |
| Categories |
| Gregorian calendar | 823 DCCCXXIII |
| Ab urbe condita | 1576 |
| Armenian calendar | 272 ԹՎ ՄՀԲ |
| Assyrian calendar | 5573 |
| Balinese saka calendar | 744–745 |
| Bengali calendar | 230 |
| Berber calendar | 1773 |
| Buddhist calendar | 1367 |
| Burmese calendar | 185 |
| Byzantine calendar | 6331–6332 |
| Chinese calendar | 壬寅年 (Water Tiger) 3520 or 3313 — to — 癸卯年 (Water Rabbit) 3521 or 3314 |
| Coptic calendar | 539–540 |
| Discordian calendar | 1989 |
| Ethiopian calendar | 815–816 |
| Hebrew calendar | 4583–4584 |
| Hindu calendars | |
| - Vikram Samvat | 879–880 |
| - Shaka Samvat | 744–745 |
| - Kali Yuga | 3923–3924 |
| Holocene calendar | 10823 |
| Iranian calendar | 201–202 |
| Islamic calendar | 207–208 |
| Japanese calendar | Kōnin 14 (弘仁１４年) |
| Javanese calendar | 719–720 |
| Julian calendar | 823 DCCCXXIII |
| Korean calendar | 3156 |
| Minguo calendar | 1089 before ROC 民前1089年 |
| Nanakshahi calendar | −645 |
| Seleucid era | 1134/1135 AG |
| Thai solar calendar | 1365–1366 |
| Tibetan calendar | 阳水虎年 (male Water-Tiger) 949 or 568 or −204 — to — 阴水兔年 (female Water-Rabbit) 950 or 569 or −203 |
Year 823 (DCCCXXIII) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar.