Year 851 (DCCCLI) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar.
851 in various calendars
851
DCCCLI
1604
300
ԹՎ Յ
5601
772–773
258
1801
1395
213
6359–6360
庚午年 (Metal Horse)
3548 or 3341
— to —
辛未年 (Metal Goat)
3549 or 3342
567–568
2017
843–844
4611–4612
907–908
772–773
3951–3952
10851
229–230
236–237
748–749
851
DCCCLI
3184
1061 before ROC
民前1061年
−617
1162/1163 AG
1393–1394
阳金马年
(male Iron-Horse)
977 or 596 or −176
— to —
阴金羊年
(female Iron-Goat)
978 or 597 or −175