391 (CCCXCI) was a common year starting on Wednesday of the Julian calendar, the 391st year of the Common Era (CE) and Anno Domini (AD) designations, the 391st year of the 1st millennium, the 91st year of the 4th century, and the 2nd year of the 390s decade. As of the start of 391, the Gregorian calendar was 1 day ahead of the Julian calendar, which was the dominant calendar of the time.

Millennium: 1st millennium
Centuries: 3rd century4th century5th century
Decades: 360s  370s  380s  – 390s –  400s  410s  420s
Years: 388 389 390391392 393 394
391 in other calendars
Gregorian calendar391
CCCXCI
Ab urbe condita1144
Assyrian calendar5141
Balinese saka calendar312–313
Bengali calendar−202
Berber calendar1341
Buddhist calendar935
Burmese calendar−247
Byzantine calendar5899–5900
Chinese calendar庚寅(Metal Tiger)
3087 or 3027
    — to —
辛卯年 (Metal Rabbit)
3088 or 3028
Coptic calendar107–108
Discordian calendar1557
Ethiopian calendar383–384
Hebrew calendar4151–4152
Hindu calendars
 - Vikram Samvat447–448
 - Shaka Samvat312–313
 - Kali Yuga3491–3492
Holocene calendar10391
Iranian calendar231 BP – 230 BP
Islamic calendar238 BH – 237 BH
Javanese calendar274–275
Julian calendar391
CCCXCI
Korean calendar2724
Minguo calendar1521 before ROC
民前1521年
Nanakshahi calendar−1077
Seleucid era702/703 AG
Thai solar calendar933–934
Tibetan calendar阳金虎年
(male Iron-Tiger)
517 or 136 or −636
    — to —
阴金兔年
(female Iron-Rabbit)
518 or 137 or −635

Events

change