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AD 91 in various calendars
Gregorian calendar	AD 91; XCI
Ab urbe condita	844
Assyrian calendar	4841
Balinese saka calendar	12–13
Bengali calendar	−502
Berber calendar	1041
Buddhist calendar	635
Burmese calendar	−547
Byzantine calendar	5599–5600
Chinese calendar	庚寅年 (Metal Tiger); 2788 or 2581; — to —; 辛卯年 (Metal Rabbit); 2789 or 2582
Coptic calendar	−193 – −192
Discordian calendar	1257
Ethiopian calendar	83–84
Hebrew calendar	3851–3852
Hindu calendars
- Vikram Samvat	147–148
- Shaka Samvat	12–13
- Kali Yuga	3191–3192
Holocene calendar	10091
Iranian calendar	531 BP – 530 BP
Islamic calendar	547 BH – 546 BH
Javanese calendar	N/A
Julian calendar	AD 91; XCI
Korean calendar	2424
Minguo calendar	1821 before ROC; 民前1821年
Nanakshahi calendar	−1377
Seleucid era	402/403 AG
Thai solar calendar	633–634
Tibetan calendar	阳金虎年; (male Iron-Tiger); 217 or −164 or −936; — to —; 阴金兔年; (female Iron-Rabbit); 218 or −163 or −935

Millennium:	1st millennium
Centuries:	1st century BC; 1st century ; 2nd century;
Decades:	70s; 80s; 90s ; 100s; 110s;
Years:	88; 89; 90; AD 91 ; 92; 93; 94;

AD 91 (XCI) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Glabrio and Traianus (or, less frequently, year 844 Ab urbe condita). The denomination AD 91 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.

Events

^ Twitchett, Denis (2008). The Cambridge history of China. Vol. 1, The Ch'in and Han Empires, 221 B.C.-A.D. 220. Cambridge University Press. p. 421. ISBN 9781139054737.
^ Suetonius (October 9, 2008). Lives of the Caesars. OUP Oxford. p. 378. ISBN 978-0-19-160910-7.