AD 31

AD 31 (XXXI) was a common year starting on Monday 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.

AD 31 in various calendars

Gregorian calendar	AD 31 XXXI
Ab urbe condita	784
Assyrian calendar	4781
Balinese saka calendar	N/A
Bengali calendar	−563 – −562
Berber calendar	981
Buddhist calendar	575
Burmese calendar	−607
Byzantine calendar	5539–5540
Chinese calendar	庚寅年 (Metal Tiger) 2728 or 2521     — to — 辛卯年 (Metal Rabbit) 2729 or 2522
Coptic calendar	−253 – −252
Discordian calendar	1197
Ethiopian calendar	23–24
Hebrew calendar	3791–3792
Hindu calendars
- Vikram Samvat	87–88
- Shaka Samvat	N/A
- Kali Yuga	3131–3132
Holocene calendar	10031
Iranian calendar	591 BP – 590 BP
Islamic calendar	609 BH – 608 BH
Javanese calendar	N/A
Julian calendar	AD 31 XXXI
Korean calendar	2364
Minguo calendar	1881 before ROC 民前1881年
Nanakshahi calendar	−1437
Seleucid era	342/343 AG
Thai solar calendar	573–574
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

Events

By place

Roman Empire

• Lucius Aelius Sejanus is named co-Consul to Emperor Tiberius. However, Tiberius becomes aware of Sejanus' treachery and has him arrested and executed.
• Naevius Sutorius Macro becomes the leader of the Praetorian Guard after Sejanus is executed.

Births

• Gnaeus Arrius Antoninus, Roman consul
• Musonius Rufus, Roman Stoic philosopher (d. 101)

Deaths

• April 6 – Jesus of Nazareth, founder of Christianity (possible date of the crucifixion)^[1][2][3] (born circa 4 BC) The other possible dates also supported by scholarly consensus among a survey of 100 published scholarly biblical statements are April 7, AD 30 and April 3, AD 33,^[3][4] and April 27, AD 31 (according to a Chodesh calculating system).^[5]
• October 18 – Lucius Aelius Sejanus, Roman prefect and advisor (b. 20 BC)
• Claudia Livia Julia, niece and daughter-in-law of Tiberius (b. 13 BC)^[6]
• Marcus Velleius Paterculus, Roman historian and writer (b. c. 19 BC)
• Nero Julius Caesar Germanicus, grandson and heir of Tiberius (b. AD 6)