784

784 in various calendars
Gregorian calendar	784; DCCLXXXIV
Ab urbe condita	1537
Armenian calendar	233; ԹՎ ՄԼԳ
Assyrian calendar	5534
Balinese saka calendar	705–706
Bengali calendar	191
Berber calendar	1734
Buddhist calendar	1328
Burmese calendar	146
Byzantine calendar	6292–6293
Chinese calendar	癸亥年 (Water Pig); 3481 or 3274; — to —; 甲子年 (Wood Rat); 3482 or 3275
Coptic calendar	500–501
Discordian calendar	1950
Ethiopian calendar	776–777
Hebrew calendar	4544–4545
Hindu calendars
- Vikram Samvat	840–841
- Shaka Samvat	705–706
- Kali Yuga	3884–3885
Holocene calendar	10784
Iranian calendar	162–163
Islamic calendar	167–168
Japanese calendar	Enryaku 3; (延暦３年)
Javanese calendar	679–680
Julian calendar	784; DCCLXXXIV
Korean calendar	3117
Minguo calendar	1128 before ROC; 民前1128年
Nanakshahi calendar	−684
Seleucid era	1095/1096 AG
Thai solar calendar	1326–1327
Tibetan calendar	阴水猪年; (female Water-Pig); 910 or 529 or −243; — to —; 阳木鼠年; (male Wood-Rat); 911 or 530 or −242

Millennium:	1st millennium
Centuries:	7th century; 8th century ; 9th century;
Decades:	760s; 770s; 780s ; 790s; 800s;
Years:	781; 782; 783; 784 ; 785; 786; 787;

Year 784 (DCCLXXXIV) was a leap year starting on Thursday (link will display the full calendar) of the Julian calendar, the 784th year of the Common Era (CE) and Anno Domini (AD) designations, the 784th year of the 1st millennium, the 84th year of the 8th century, and the 5th year of the 780s decade. The denomination 784 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

Saxon Wars: King Charlemagne begins a campaign in northern Saxony. He ravages Eastphalian territory as far as the Elbe River, while his son, Charles the Younger, defeats a Saxon force in the Lippe Valley. Bad weather hinders Charlemagne's winter campaign in southern Saxony.^[1]
Winter – Charlemagne returns to Eresburg and builds a church, probably on the site of the Irminsul (a pagan religious site). Frankish forces based at Eresburg attack rebel Saxon settlements, and take control of the roads. Charlemagne himself takes part in some of these raids.^[2]

Abd al-Rahman I, Muslim emir of Córdoba (Al-Andalus), begins the construction of the Prayer Hall of the Great Mosque of Córdoba. He uses the mosque (originally called Aljama Mosque) as an adjunct to his palace, and names it in honour of his wife.

The Japanese begin a war against the Ainu, in the north, on the main island of Honshu. Emperor Kanmu wishes to be free from the influence of the Buddhist monasteries around Nara (then called Heijō), and moves the capital to Nagaoka, ending the Nara period.
Nagaoka-kyō becomes the Japanese imperial capital.

February 4 – Itzamnaaj K'awiil, brother of Bat K'awiil (who reigned between 780 and 784) and the son of K'ahk' Ukalaw Chan Chaak (who ruled 755 to 780) becomes the new ruler of the Mayan city state of Naranjo in Guatemala and reigns until his death in 810.

Ibn Sa'd al-Baghdadi, Muslim historian (d. 845)
Li Jue, chancellor of the Tang Dynasty (approximate date)
Theodrada, Frankish princess and abbess, daughter of Charlemagne (approximate date)

Nicolle, David (2014). The Conquest of Saxony AD 782–785. Bloomsbury USA. ISBN 978-1-78200-825-5.