| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| Gregorian calendar | 844 DCCCXLIV |
| Ab urbe condita | 1597 |
| Armenian calendar | 293 ԹՎ ՄՂԳ |
| Assyrian calendar | 5594 |
| Bengali calendar | 251 |
| Berber calendar | 1794 |
| Buddhist calendar | 1388 |
| Burmese calendar | 206 |
| Byzantine calendar | 6352–6353 |
| Chinese calendar |
癸亥年 (Water Pig) 3540 or 3480 — to — 甲子年 (Wood Rat) 3541 or 3481 |
| Coptic calendar | 560–561 |
| Discordian calendar | 2010 |
| Ethiopian calendar | 836–837 |
| Hebrew calendar | 4604–4605 |
| Hindu calendars | |
| - Vikram Samvat | 900–901 |
| - Shaka Samvat | 765–766 |
| - Kali Yuga | 3944–3945 |
| Holocene calendar | 10844 |
| Iranian calendar | 222–223 |
| Islamic calendar | 229–230 |
| Japanese calendar |
Jōwa 11 (承和11年) |
| Javanese calendar | 741–742 |
| Julian calendar | 844 DCCCXLIV |
| Korean calendar | 3177 |
| Minguo calendar | 1068 before ROC 民前1068年 |
| Nanakshahi calendar | −624 |
| Seleucid era | 1155/1156 AG |
| Thai solar calendar | 1386–1387 |
Year 844 (DCCCXLIV) was a leap year starting on Tuesday (link will display the full calendar) of the Julian calendar.