790

790 in various calendars
Gregorian calendar	790; DCCXC
Ab urbe condita	1543
Armenian calendar	239; ԹՎ ՄԼԹ
Assyrian calendar	5540
Balinese saka calendar	711–712
Bengali calendar	197
Berber calendar	1740
Buddhist calendar	1334
Burmese calendar	152
Byzantine calendar	6298–6299
Chinese calendar	己巳年 (Earth Snake); 3487 or 3280; — to —; 庚午年 (Metal Horse); 3488 or 3281
Coptic calendar	506–507
Discordian calendar	1956
Ethiopian calendar	782–783
Hebrew calendar	4550–4551
Hindu calendars
- Vikram Samvat	846–847
- Shaka Samvat	711–712
- Kali Yuga	3890–3891
Holocene calendar	10790
Iranian calendar	168–169
Islamic calendar	173–174
Japanese calendar	Enryaku 9; (延暦９年)
Javanese calendar	685–686
Julian calendar	790; DCCXC
Korean calendar	3123
Minguo calendar	1122 before ROC; 民前1122年
Nanakshahi calendar	−678
Seleucid era	1101/1102 AG
Thai solar calendar	1332–1333
Tibetan calendar	阴土蛇年; (female Earth-Snake); 916 or 535 or −237; — to —; 阳金马年; (male Iron-Horse); 917 or 536 or −236

Millennium:	1st millennium
Centuries:	7th century; 8th century ; 9th century;
Decades:	770s; 780s; 790s ; 800s; 810s;
Years:	787; 788; 789; 790 ; 791; 792; 793;

Year 790 (DCCXC) was a common year starting on Friday (link will display the full calendar) of the Julian calendar, the 790th year of the Common Era (CE) and Anno Domini (AD) designations, the 790th year of the 1st millennium, the 90th year of the 8th century, and the 1st year of the 790s decade. The denomination 790 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

September – The Armeniac Theme, located in northeastern Asia Minor (modern Turkey), revolts against Empress Irene, and declares the 19-year-old Constantine VI sole ruler of the Byzantine Empire. Other themes follow its example, and imprison their strategoi. Constantine sends his iconoclast general Michael Lachanodrakon, to ensure that the Armeniacs (his closest supporters) take an oath. Irene is confined and imprisoned in her palace at Constantinople; all her eunuchs are exiled.

Alcuin, Anglo-Saxon missionary, returns (after an 8-year absence) to England. During his stay at the Carolingian court of King Charlemagne in Aachen, he has educated his sons Charles, Pepin and Louis. Alcuin revises the church liturgy and the Bible, and is responsible for an intellectual movement within the Frankish Kingdom.

King Æthelred I returns to Northumbria, and is restored to the throne after living in exile for 11 years. His rival Osred II is deposed, forcibly tonsured, and exiled to the Isle of Man. Æthelred then faces a rebellion by another rival, named Eardwulf. The latter is captured, and hanged outside the gates to Ripon Abbey. The body is taken into the abbey, where Eardwulf recovers and escapes to exile.
King Offa of Mercia takes control of East Anglia. King Æthelberht II mints his own coins, in defiance of his overlord (approximate date).

Cambodia begins to break away from the Sumatra-based kingdom Srivijaya, as a 20-year-old Cambodian prince, who claims descent from the rulers of Funan, is consecrated in eastern Cambodia with the title Jayavarman II. In the next 10 years he will extend his powers north into the Mekong Valley (modern Vietnam).

Irish monks (known as the Papar), possibly members of a Hiberno-Scottish mission, supposedly reach Iceland in hide-covered coracles, and begin settlements (approximate date). However, the evidence for this is scant.
Angilbert, Frankish diplomat (primicerius palatii) of King Charlemagne, is made abbot of Saint-Riquier (Northern France).
Joseph is consecrated Syriac Orthodox Patriarch of Antioch