31

AD 31 in other calendars
Gregorian calendar	AD 31; XXXI
Ab urbe condita	784
Assyrian calendar	4781
Balinese saka calendar	N/A
Bengali calendar	−562
Berber calendar	981
Buddhist calendar	575
Burmese calendar	−607
Byzantine calendar	5539–5540
Chinese calendar	庚寅年 (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	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

Millennium:	1st millennium
Centuries:	1st century BC – 1st century – 2nd century
Decades:	0s 10s 20s – 30s – 40s 50s 60s
Years:	28 29 30 – 31 – 32 33 34

31 is a year in the 1st century. It was a common year starting on Monday of the Julian calendar. At the time, it was known as the Year of the Consulship of Augustus and Seianus.

Events

Aelius Sejanus named co-Consul to the Emperor Tiberius. Tiberius has Sejanus arrested for treachery and executed.
April 6 - possible crucifixion of Jesus
Naevius Sutorius Macro becomes the leader of the Praetorian Guard
Tiberius returns to Rome from Capri