1020

Millennium:	2nd millennium
Centuries:	10th century 11th century 12th century
Decades:	1000s 1010s 1020s 1030s 1040s
Years:	1017 1018 1019 1020 1021 1022 1023

1020 in various calendars

Gregorian calendar	1020 MXX
Ab urbe condita	1773
Armenian calendar	469 ԹՎ ՆԿԹ
Assyrian calendar	5770
Balinese saka calendar	941–942
Bengali calendar	427
Berber calendar	1970
English Regnal year	N/A
Buddhist calendar	1564
Burmese calendar	382
Byzantine calendar	6528–6529
Chinese calendar	己未年 (Earth Goat) 3717 or 3510     — to — 庚申年 (Metal Monkey) 3718 or 3511
Coptic calendar	736–737
Discordian calendar	2186
Ethiopian calendar	1012–1013
Hebrew calendar	4780–4781
Hindu calendars
- Vikram Samvat	1076–1077
- Shaka Samvat	941–942
- Kali Yuga	4120–4121
Holocene calendar	11020
Igbo calendar	20–21
Iranian calendar	398–399
Islamic calendar	410–411
Japanese calendar	Kannin 4 (寛仁４年)
Javanese calendar	922–923
Julian calendar	1020 MXX
Korean calendar	3353
Minguo calendar	892 before ROC 民前892年
Nanakshahi calendar	−448
Seleucid era	1331/1332 AG
Thai solar calendar	1562–1563
Tibetan calendar	阴土羊年 (female Earth-Goat) 1146 or 765 or −7     — to — 阳金猴年 (male Iron-Monkey) 1147 or 766 or −6

Year 1020 (MXX) was a leap year starting on Friday (link will display the full calendar) of the Julian calendar.

Events

• Summer – Emperor Henry II conducts his third Italian military campaign. He makes plans to invade the south, but remains non-committal.
• June 15 – Byzantine troops under Catepan Basil Boioannes (supported by his ally Prince Pandulf IV) capture the fortress of Troia.
• The French city of Saint-Germain-en-Laye is founded by King Robert II (the Pious).
• King Canute the Great codifies the laws of England (approximate date).
• King Gagik I of Armenia is succeeded by Hovhannes-Smbat III.

Births

• Almodis de la Marche, French noblewoman (d. 1071)
• Beatrice of Bar, French duchess and regent (d. 1076)
• Benno II, German bishop and architect (approximate date)
• Bernard of Menthon, French priest and saint (d. 1081)
• Conrad I (or Cuno), duke of Bavaria (approximate date)
• Filarete of Calabria, Sicilian saint (approximate date)
• Gonzalo Sánchez, Spanish nobleman (approximate date)
• Gunhilda of Denmark, German queen (approximate date)
• Guo Xi, Chinese landscape painter (approximate date)
• Hallvard Vebjørnsson, Norwegian saint (approximate date)
• Kunigunde of Altdorf, German noblewoman (approximate date)
• Maria of Gaeta, Italian noblewoman (approximate date)
• Osbern Giffard, Norman nobleman (approximate date)
• Otto of Nordheim, duke of Bavaria (approximate date)
• Stephen IX, pope of the Catholic Church (approximate date)
• Su Song, Chinese statesman and scientist (d. 1101)
• Sweyn Godwinson, English nobleman (approximate date)
• Vladimir Yaroslavich, Grand Prince of Kiev (d. 1052)
• William I (the Great), count of Burgundy (d. 1087)
• William Busac, English nobleman (jure uxoris) (d. 1076)
• William FitzOsbern, 1st Earl of Hereford (approximate date)
• William of Poitiers, French priest and writer (d. 1090)
• Wulfhild of Norway, duchess consort of Saxony (d. 1071)
• Zhang Zai, Chinese philosopher and cosmologist (d. 1077)

Deaths

• June 12 – Lyfing, archbishop of Canterbury
• June 15 – Dattus (or Datto), Lombard rebel leader
• August 16 – Zhou Huaizheng, Chinese eunuch
• Al-Mu'ayyad Ahmad, Muslim imam (b. 944)
• Al-Sijzi, Persian mathematician (approximate date)
• Bernard I (Taillefer), Spanish nobleman
• Bouchard II (the Bearded), French nobleman (b. 975)
• Einar Sigurdsson, Norse Viking nobleman
• Ferdowsi, Persian poet and author (b. 940)
• Gagik I, king of Bagratid Armenia (approximate date)
• Gerald I (Tranche-Lion), French nobleman
• Gojslav, king of Croatia (approximate date)
• Leif Ericson, Norse Viking explorer (approximate date)
• Melus of Bari, Lombard nobleman and rebel leader
• Radim Gaudentius, Polish archbishop (b. 970)
• Stephen I of Vermandois, French nobleman
• Trdat the Architect, Armenian chief architect