1338
| Years | 
|---|
| Millennium | 
| 2nd millennium | 
| Centuries | 
| Decades | 
| Years | 
| 1338 by topic | 
|---|
| Leaders | 
| 
 | 
| Birth and death categories | 
| Births – Deaths | 
| Establishments and disestablishments categories | 
| Establishments – Disestablishments | 
| Art and literature | 
| 1338 in poetry | 
| Gregorian calendar | 1338 MCCCXXXVIII | 
| Ab urbe condita | 2091 | 
| Armenian calendar | 787 ԹՎ ՉՁԷ | 
| Assyrian calendar | 6088 | 
| Balinese saka calendar | 1259–1260 | 
| Bengali calendar | 744–745 | 
| Berber calendar | 2288 | 
| English Regnal year | 11 Edw. 3 – 12 Edw. 3 | 
| Buddhist calendar | 1882 | 
| Burmese calendar | 700 | 
| Byzantine calendar | 6846–6847 | 
| Chinese calendar | 丁丑年 (Fire Ox) 4035 or 3828 — to — 戊寅年 (Earth Tiger) 4036 or 3829 | 
| Coptic calendar | 1054–1055 | 
| Discordian calendar | 2504 | 
| Ethiopian calendar | 1330–1331 | 
| Hebrew calendar | 5098–5099 | 
| Hindu calendars | |
| - Vikram Samvat | 1394–1395 | 
| - Shaka Samvat | 1259–1260 | 
| - Kali Yuga | 4438–4439 | 
| Holocene calendar | 11338 | 
| Igbo calendar | 338–339 | 
| Iranian calendar | 716–717 | 
| Islamic calendar | 738–739 | 
| Japanese calendar | Shōkei 7 / Ryakuō 1 (暦応元年) | 
| Javanese calendar | 1250–1251 | 
| Julian calendar | 1338 MCCCXXXVIII | 
| Korean calendar | 3671 | 
| Minguo calendar | 574 before ROC 民前574年 | 
| Nanakshahi calendar | −130 | 
| Thai solar calendar | 1880–1881 | 
| Tibetan calendar | 阴火牛年 (female Fire-Ox) 1464 or 1083 or 311 — to — 阳土虎年 (male Earth-Tiger) 1465 or 1084 or 312 | 
Year 1338 (MCCCXXXVIII) was a common year starting on Thursday of the Julian calendar.