Millennium: 1st millennium
320 in various calendars
Gregorian calendar320
Ab urbe condita1073
Assyrian calendar5070
Balinese saka calendar241–242
Bengali calendar−273
Berber calendar1270
Buddhist calendar864
Burmese calendar−318
Byzantine calendar5828–5829
Chinese calendar己卯(Earth Rabbit)
3016 or 2956
    — to —
庚辰年 (Metal Dragon)
3017 or 2957
Coptic calendar36–37
Discordian calendar1486
Ethiopian calendar312–313
Hebrew calendar4080–4081
Hindu calendars
 - Vikram Samvat376–377
 - Shaka Samvat241–242
 - Kali Yuga3420–3421
Holocene calendar10320
Iranian calendar302 BP – 301 BP
Islamic calendar311 BH – 310 BH
Javanese calendar201–202
Julian calendar320
Korean calendar2653
Minguo calendar1592 before ROC
Nanakshahi calendar−1148
Seleucid era631/632 AG
Thai solar calendar862–863
Tibetan calendar阴土兔年
(female Earth-Rabbit)
446 or 65 or −707
    — to —
(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.


By place

Roman Empire