320
| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| Gregorian calendar | 320 CCCXX |
| Ab urbe condita | 1073 |
| Assyrian calendar | 5070 |
| Balinese saka calendar | 241–242 |
| Bengali calendar | −273 |
| Berber calendar | 1270 |
| Buddhist calendar | 864 |
| Burmese calendar | −318 |
| Byzantine calendar | 5828–5829 |
| Chinese calendar |
己卯年 (Earth Rabbit) 3016 or 2956 — to — 庚辰年 (Metal Dragon) 3017 or 2957 |
| Coptic calendar | 36–37 |
| Discordian calendar | 1486 |
| Ethiopian calendar | 312–313 |
| Hebrew calendar | 4080–4081 |
| Hindu calendars | |
| - Vikram Samvat | 376–377 |
| - Shaka Samvat | 241–242 |
| - Kali Yuga | 3420–3421 |
| Holocene calendar | 10320 |
| Iranian calendar | 302 BP – 301 BP |
| Islamic calendar | 311 BH – 310 BH |
| Javanese calendar | 201–202 |
| Julian calendar | 320 CCCXX |
| Korean calendar | 2653 |
| Minguo calendar | 1592 before ROC 民前1592年 |
| Nanakshahi calendar | −1148 |
| Seleucid era | 631/632 AG |
| Thai solar calendar | 862–863 |
| Tibetan calendar | 阴土兔年 (female Earth-Rabbit) 446 or 65 or −707 — to — 阳金龙年 (male Iron-Dragon) 447 or 66 or −706 |
Year 320 (CCCXX) was a leap year starting on Friday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Constantinus and Constantinus (or, less frequently, year 1073 Ab urbe condita). The denomination 320 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
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