31 BC


Year 31 BC was either a common year starting on Tuesday, Wednesday or Thursday or a leap year starting on Tuesday or Wednesday of the Julian calendar. At the time, it was known as the Year of the Consulship of Antonius and Octavianus.

Millennium: 1st millennium BC
Centuries: 2nd century BC1st century BC1st century
Decades: 60s BC  50s BC  40s BC  – 30s BC –  20s BC  10s BC  0s BC
Years: 34 BC 33 BC 32 BC31 BC30 BC 29 BC 28 BC
31 BC in other calendars
Gregorian calendar31 BC
Ab urbe condita723
Ancient Egypt eraXXXIII dynasty, 293
- PharaohCleopatra VII, 21
Ancient Greek era187th Olympiad, year 2
Assyrian calendar4720
Balinese saka calendarN/A
Bengali calendar−623
Berber calendar920
Buddhist calendar514
Burmese calendar−668
Byzantine calendar5478–5479
Chinese calendar己丑(Earth Ox)
2666 or 2606
    — to —
庚寅年 (Metal Tiger)
2667 or 2607
Coptic calendar−314 – −313
Discordian calendar1136
Ethiopian calendar−38 – −37
Hebrew calendar3730–3731
Hindu calendars
 - Vikram Samvat26–27
 - Shaka SamvatN/A
 - Kali Yuga3070–3071
Holocene calendar9970
Iranian calendar652 BP – 651 BP
Islamic calendar672 BH – 671 BH
Javanese calendarN/A
Julian calendar31 BC
Korean calendar2303
Minguo calendar1942 before ROC
Nanakshahi calendar−1498
Seleucid era281/282 AG
Thai solar calendar512–513
Tibetan calendar阴土牛年
(female Earth-Ox)
96 or −285 or −1057
    — to —
(male Iron-Tiger)
97 or −284 or −1056