854

854 in various calendars
Gregorian calendar	854; DCCCLIV
Ab urbe condita	1607
Armenian calendar	303; ԹՎ ՅԳ
Assyrian calendar	5604
Balinese saka calendar	775–776
Bengali calendar	261
Berber calendar	1804
Buddhist calendar	1398
Burmese calendar	216
Byzantine calendar	6362–6363
Chinese calendar	癸酉年 (Water Rooster); 3551 or 3344; — to —; 甲戌年 (Wood Dog); 3552 or 3345
Coptic calendar	570–571
Discordian calendar	2020
Ethiopian calendar	846–847
Hebrew calendar	4614–4615
Hindu calendars
- Vikram Samvat	910–911
- Shaka Samvat	775–776
- Kali Yuga	3954–3955
Holocene calendar	10854
Iranian calendar	232–233
Islamic calendar	239–240
Japanese calendar	Ninju 4 / Saikō 1; (斉衡元年)
Javanese calendar	751–752
Julian calendar	854; DCCCLIV
Korean calendar	3187
Minguo calendar	1058 before ROC; 民前1058年
Nanakshahi calendar	−614
Seleucid era	1165/1166 AG
Thai solar calendar	1396–1397
Tibetan calendar	阴水鸡年; (female Water-Rooster); 980 or 599 or −173; — to —; 阳木狗年; (male Wood-Dog); 981 or 600 or −172

Millennium:	1st millennium
Centuries:	8th century; 9th century ; 10th century;
Decades:	830s; 840s; 850s ; 860s; 870s;
Years:	851; 852; 853; 854 ; 855; 856; 857;

Year 854 (DCCCLIV) was a common year starting on Monday (link will display the full calendar) of the Julian calendar.

Events

Emperor Lothair I meets his (half) brothers (Louis the German and Charles the Bald) in Attigny, Ardennes for the third time, to continue the system of "con-fraternal government".
Viking chieftains Rorik and Godfrid Haraldsson return to Denmark, to gain power after the death of King Horik I. During a civil war, they are forced to go back to Friesland.^[1]
The German city of Ulm is first mentioned, in a document by Louis the German. ^[2]
Croatian–Bulgarian battle: Bulgarian Khan (later Knyaz) Boris I,^[3] attacks the Duchy of Littoral Croatia, ruled by Duke Trpimir I during the First Croatian-Bulgarian War. It is fought on the Croatian territory in the vicinity of the Croatian–Bulgarian border^[4] in present-day northeastern Bosnia and Herzegovina. None of the warring sides emerges victorious, Bulgarian forces retreat and finally both parties subsequently conclude a peace treaty.^[5]

King Æthelwulf of Wessex sends his two youngest sons, Alfred and Æthelred, on a pilgrimage to Rome.^[6]
King Æthelweard of East Anglia dies, and is succeeded by his 14-year-old son Edmund ("the Martyr").^[7]
King Cyngen of Powys makes the first pilgrimage to Rome of a Welsh ruler.
Viking chieftain Ubba winters in Milford Haven (Wales) with 23 ships.^[8]

^ Norsemen in the Low Countries: Extracts from the Annales Bertiniani, 855 entry Archived June 14, 2011, at the Wayback Machine
^ Zeit.de: Das Alter der Städte
^ "Boris I". Encyclopædia Britannica, Inc. November 13, 2021.
^ Fine, John van Antwerp (November 13, 2021). The Early Medieval Balkans, page 112. The University of Michigan Press, 1983. ISBN 978-0472081493.
^ Deliso, Christopher (November 13, 2021). The History of Croatia and Slovenia, page 46. ABC-CLIO, LLC, 2020, Santa Barbara, California. ISBN 9781440873232.
^ ASC 854 - English translation at Project Gutenberg
^ Kirby, The Earliest English Kings, p. 161.
^ Milford Haven Town Council website History, Chronology of Events Archived March 13, 2012, at the Wayback Machine