838
| Years | 
|---|
| Millennium | 
| 1st millennium | 
| Centuries | 
| Decades | 
| Years | 
| 838 by topic | 
|---|
| Leaders | 
| Categories | 
| 
 | 
| Gregorian calendar | 838 DCCCXXXVIII | 
| Ab urbe condita | 1591 | 
| Armenian calendar | 287 ԹՎ ՄՁԷ | 
| Assyrian calendar | 5588 | 
| Balinese saka calendar | 759–760 | 
| Bengali calendar | 244–245 | 
| Berber calendar | 1788 | 
| Buddhist calendar | 1382 | 
| Burmese calendar | 200 | 
| Byzantine calendar | 6346–6347 | 
| Chinese calendar | 丁巳年 (Fire Snake) 3535 or 3328 — to — 戊午年 (Earth Horse) 3536 or 3329 | 
| Coptic calendar | 554–555 | 
| Discordian calendar | 2004 | 
| Ethiopian calendar | 830–831 | 
| Hebrew calendar | 4598–4599 | 
| Hindu calendars | |
| - Vikram Samvat | 894–895 | 
| - Shaka Samvat | 759–760 | 
| - Kali Yuga | 3938–3939 | 
| Holocene calendar | 10838 | 
| Iranian calendar | 216–217 | 
| Islamic calendar | 223–224 | 
| Japanese calendar | Jōwa 5 (承和5年) | 
| Javanese calendar | 734–736 | 
| Julian calendar | 838 DCCCXXXVIII | 
| Korean calendar | 3171 | 
| Minguo calendar | 1074 before ROC 民前1074年 | 
| Nanakshahi calendar | −630 | 
| Seleucid era | 1149/1150 AG | 
| Thai solar calendar | 1380–1381 | 
| Tibetan calendar | 阴火蛇年 (female Fire-Snake) 964 or 583 or −189 — to — 阳土马年 (male Earth-Horse) 965 or 584 or −188 | 
Year 838 (DCCCXXXVIII) was a common year starting on Tuesday of the Julian calendar.