Millennium: 1st millennium
Centuries:
Decades:
Years:
AD 81 in various calendars
Gregorian calendarAD 81
LXXXI
Ab urbe condita834
Assyrian calendar4831
Balinese saka calendar2–3
Bengali calendar−512
Berber calendar1031
Buddhist calendar625
Burmese calendar−557
Byzantine calendar5589–5590
Chinese calendar庚辰(Metal Dragon)
2777 or 2717
    — to —
辛巳年 (Metal Snake)
2778 or 2718
Coptic calendar−203 – −202
Discordian calendar1247
Ethiopian calendar73–74
Hebrew calendar3841–3842
Hindu calendars
 - Vikram Samvat137–138
 - Shaka Samvat2–3
 - Kali Yuga3181–3182
Holocene calendar10081
Iranian calendar541 BP – 540 BP
Islamic calendar558 BH – 557 BH
Javanese calendarN/A
Julian calendarAD 81
LXXXI
Korean calendar2414
Minguo calendar1831 before ROC
民前1831年
Nanakshahi calendar−1387
Seleucid era392/393 AG
Thai solar calendar623–624
Tibetan calendar阳金龙年
(male Iron-Dragon)
207 or −174 or −946
    — to —
阴金蛇年
(female Iron-Snake)
208 or −173 or −945

A.D. 81 (LXXXI) 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 Silva and Pollio (or, less frequently, year 834 Ab urbe condita). The denomination A.D. 81 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.

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Roman Empire