| Years |
|---|
| Millennium |
| 1st millennium |
| Centuries |
| Decades |
| Years |
| 380 by topic |
|---|
| Arts, history, and science |
| Countries |
|
|
| Lists of leaders |
| Birth and death categories |
| Establishments and disestablishments categories |
| Works category |
| Gregorian calendar | 380 CCCLXXX |
| Ab urbe condita | 1133 |
| Assyrian calendar | 5130 |
| Balinese saka calendar | 301–302 |
| Bengali calendar | −213 |
| Berber calendar | 1330 |
| Buddhist calendar | 924 |
| Burmese calendar | −258 |
| Byzantine calendar | 5888–5889 |
| Chinese calendar | 己卯年 (Earth Rabbit) 3076 or 3016 — to — 庚辰年 (Metal Dragon) 3077 or 3017 |
| Coptic calendar | 96–97 |
| Discordian calendar | 1546 |
| Ethiopian calendar | 372–373 |
| Hebrew calendar | 4140–4141 |
| Hindu calendars | |
| - Vikram Samvat | 436–437 |
| - Shaka Samvat | 301–302 |
| - Kali Yuga | 3480–3481 |
| Holocene calendar | 10380 |
| Iranian calendar | 242 BP – 241 BP |
| Islamic calendar | 249 BH – 248 BH |
| Javanese calendar | 262–263 |
| Julian calendar | 380 CCCLXXX |
| Korean calendar | 2713 |
| Minguo calendar | 1532 before ROC 民前1532年 |
| Nanakshahi calendar | −1088 |
| Seleucid era | 691/692 AG |
| Thai solar calendar | 922–923 |
| Tibetan calendar | ས་མོ་ཡོས་ལོ་ (female Earth-Hare) 506 or 125 or −647 — to — ལྕགས་ཕོ་འབྲུག་ལོ་ (male Iron-Dragon) 507 or 126 or −646 |
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380 (CCCLXXX) was a leap year starting on Wednesday of the Julian calendar, the 380th year of the Common Era (CE) and Anno Domini (AD) designations, the 380th year of the 1st millennium, the 80th year of the 4th century, and the 1st year of the 380s decade. As of the start of 380, the Gregorian calendar was 1 day ahead of the Julian calendar, which was the dominant calendar of the time.