820

Year 820 (DCCCXX) was a leap year starting on Sunday of the Julian calendar.

820 in various calendars

Gregorian calendar	820 DCCCXX
Ab urbe condita	1573
Armenian calendar	269 ԹՎ ՄԿԹ
Assyrian calendar	5570
Balinese saka calendar	741–742
Bengali calendar	226–227
Berber calendar	1770
Buddhist calendar	1364
Burmese calendar	182
Byzantine calendar	6328–6329
Chinese calendar	己亥年 (Earth Pig) 3517 or 3310     — to — 庚子年 (Metal Rat) 3518 or 3311
Coptic calendar	536–537
Discordian calendar	1986
Ethiopian calendar	812–813
Hebrew calendar	4580–4581
Hindu calendars
- Vikram Samvat	876–877
- Shaka Samvat	741–742
- Kali Yuga	3920–3921
Holocene calendar	10820
Iranian calendar	198–199
Islamic calendar	204–205
Japanese calendar	Kōnin 11 (弘仁１１年)
Javanese calendar	716–717
Julian calendar	820 DCCCXX
Korean calendar	3153
Minguo calendar	1092 before ROC 民前1092年
Nanakshahi calendar	−648
Seleucid era	1131/1132 AG
Thai solar calendar	1362–1363
Tibetan calendar	ས་མོ་ཕག་ལོ་ (female Earth-Boar) 946 or 565 or −207     — to — ལྕགས་ཕོ་བྱི་བ་ལོ་ (male Iron-Rat) 947 or 566 or −206

Emperor Michael II and his son Theophilos

Events

By place

Abbasid Caliphate

• Abbasid caliph Al-Ma'mun appointed Isa ibn Yazid al-Juludi as Abbasid governor of Yemen for few months.
• Caliph Al-Ma'mun appointed Hisn ibn al-Minhal as Abbasid governor of Yemen for few months.
• Caliph Al-Ma'mun appointed Ibrahim al-Ifriqi as Abbasid governor of Yemen. He remained in office until 821.
• Caliph al-Ma'mun appointed Abu Nasr ibn al-Sari as Abbasid governor of Egypt.

Byzantine Empire

• December 25 – Emperor Leo V (the Armenian) is assassinated by conspirators in the Hagia Sophia, at Constantinople. Though unarmed, he fights back fiercely but dies of his wounds. He is succeeded by Michael II, the commander of the palace guard (excubitores). Leo's family (including his mother and his wife Theodosia) are exiled to monasteries in Princes' Islands.^[1]

Ireland

• Fedelmid mac Crimthainn assumes the kingship as ruler of Munster (modern Ireland).

China

• Emperor Xian Zong dies from poisoning (due to medicines), after a 14-year reign. He is succeeded by his son Mu Zong, as ruler of the Tang dynasty.

Births

• Adalbert I, Frankish margrave (approximate date)
• Adelaide of Tours, Frankish noblewoman (approximate date)
• Álmos, military leader (gyula) of the Hungarians (approximate date)
• Anandavardhana, Indian philosopher (d. 890)
• Ashot I ("the Great"), king of Armenia (approximate date)
• Buhturi, Syrian poet (d. 897)
• Godfrid Haraldsson, Danish Viking king (approximate date)
• Grimbald, Frankish Benedictine monk (d. 901)
• Hucbert, Frankish nobleman (d. 864)
• Ibn Khordadbeh, Persian geographer (approximate date)
• Qusta ibn Luqa, Syrian Melkite physician (d. 912)
• Ranulf I of Aquitaine, Frankish nobleman (d. 866)
• Rhodri the Great, king of Gwynedd (Wales) (approximate date)

Deaths

• September 14, Li Yong, chancellor of the Tang dynasty
• December 25, Leo V, emperor of the Byzantine Empire (b. 775)
• Adi Shankara, Indian philosopher and theologian (b. 788)
• Causantín mac Fergusa, king of the Picts^[2]
• Huangfu Bo, chancellor of the Tang dynasty
• Lupo III, duke of Gascony (approximate date)
• Muhammad ibn Idris al-Shafi‘i, Muslim imam (b. 767)
• Olcobhar mac Cummuscach, abbot of Clonfert
• Song Ruoxin, Chinese scholar and poet (b. 768)
• Tnúthgal mac Donngaile, king of Munster
• Tutu Chengcui, eunuch and advisor of the Tang dynasty
• Wang Chengzong, general of the Tang dynasty
• Xian Zong, emperor of the Tang dynasty (b. 778)