AD 31

Millennium: 1st millennium
Centuries:
Decades:
Years:
AD 31 in various calendars
Gregorian calendarAD 31
XXXI
Ab urbe condita784
Assyrian calendar4781
Balinese saka calendarN/A
Bengali calendar−562
Berber calendar981
Buddhist calendar575
Burmese calendar−607
Byzantine calendar5539–5540
Chinese calendar庚寅年 (Metal Tiger)
2728 or 2521
    — to —
辛卯年 (Metal Rabbit)
2729 or 2522
Coptic calendar−253 – −252
Discordian calendar1197
Ethiopian calendar23–24
Hebrew calendar3791–3792
Hindu calendars
 - Vikram Samvat87–88
 - Shaka SamvatN/A
 - Kali Yuga3131–3132
Holocene calendar10031
Iranian calendar591 BP – 590 BP
Islamic calendar609 BH – 608 BH
Javanese calendarN/A
Julian calendarAD 31
XXXI
Korean calendar2364
Minguo calendar1881 before ROC
民前1881年
Nanakshahi calendar−1437
Seleucid era342/343 AG
Thai solar calendar573–574
Tibetan calendar阳金虎年
(male Iron-Tiger)
157 or −224 or −996
    — to —
阴金兔年
(female Iron-Rabbit)
158 or −223 or −995

AD 31 (XXXI) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Tiberius and Sejanus (or, less frequently, year 784 Ab urbe condita). The denomination AD 31 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.