| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| Gregorian calendar | 849 DCCCXLIX |
| Ab urbe condita | 1602 |
| Armenian calendar | 298 ԹՎ ՄՂԸ |
| Assyrian calendar | 5599 |
| Bengali calendar | 256 |
| Berber calendar | 1799 |
| Buddhist calendar | 1393 |
| Burmese calendar | 211 |
| Byzantine calendar | 6357–6358 |
| Chinese calendar |
戊辰年 (Earth Dragon) 3545 or 3485 — to — 己巳年 (Earth Snake) 3546 or 3486 |
| Coptic calendar | 565–566 |
| Discordian calendar | 2015 |
| Ethiopian calendar | 841–842 |
| Hebrew calendar | 4609–4610 |
| Hindu calendars | |
| - Vikram Samvat | 905–906 |
| - Shaka Samvat | 770–771 |
| - Kali Yuga | 3949–3950 |
| Holocene calendar | 10849 |
| Iranian calendar | 227–228 |
| Islamic calendar | 234–235 |
| Japanese calendar |
Kashō 2 (嘉祥2年) |
| Javanese calendar | 746–747 |
| Julian calendar | 849 DCCCXLIX |
| Korean calendar | 3182 |
| Minguo calendar | 1063 before ROC 民前1063年 |
| Nanakshahi calendar | −619 |
| Seleucid era | 1160/1161 AG |
| Thai solar calendar | 1391–1392 |
Year 849 (DCCCXLIX) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar.