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This article is about the year 31. For the number, see 31 (number). For other uses, see 31 (disambiguation).
Millennium: 1st millennium
Centuries: 1st century BC1st century2nd century
Decades: 0s  10s  20s  – 30s –  40s  50s  60s
Years: 28 29 303132 33 34
31 by topic
State leadersSovereign states
Birth and death categories
Establishment and disestablishment categories
31 in other calendars
Gregorian calendar 31
Ab urbe condita 784
Assyrian calendar 4781
Bengali calendar −562
Berber calendar 981
Buddhist calendar 575
Burmese calendar −607
Byzantine calendar 5539–5540
Chinese calendar 庚寅(Metal Tiger)
2727 or 2667
    — to —
辛卯年 (Metal Rabbit)
2728 or 2668
Coptic calendar −253 – −252
Discordian calendar 1197
Ethiopian calendar 23–24
Hebrew calendar 3791–3792
Hindu calendars
 - Vikram Samvat 87–88
 - Shaka Samvat N/A
 - Kali Yuga 3132–3133
Holocene calendar 10031
Iranian calendar 591 BP – 590 BP
Islamic calendar 609 BH – 608 BH
Javanese calendar N/A
Julian calendar 31
Korean calendar 2364
Minguo calendar 1881 before ROC
Nanakshahi calendar −1437
Seleucid era 342/343 AG
Thai solar calendar 573–574

Year 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 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.


By place[edit]

Roman Empire[edit]