Year 781 (DCCLXXXI) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. The denomination 781 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.
781 in various calendars
781
DCCLXXXI
1534
230
ԹՎ ՄԼ
5531
702–703
188
1731
1325
143
6289–6290
庚申年 (Metal Monkey)
3478 or 3271
— to —
辛酉年 (Metal Rooster)
3479 or 3272
497–498
1947
773–774
4541–4542
837–838
702–703
3881–3882
10781
159–160
164–165
676–677
781
DCCLXXXI
3114
1131 before ROC
民前1131年
−687
1092/1093 AG
1323–1324
阳金猴年
(male Iron-Monkey)
907 or 526 or −246
— to —
阴金鸡年
(female Iron-Rooster)
908 or 527 or −245