1021

Years: 1018 1019 1020 - 1021 - 1022 1023 1024

Decades: 990s 1000s 1010s - 1020s - 1030s 1040s 1050s

Centuries: 10th century - 11th century - 12th century

1021 in various calendars

Gregorian calendar	1021 MXXI
Ab urbe condita	1774
Armenian calendar	470 ԹՎ ՆՀ
Assyrian calendar	5771
Balinese saka calendar	942–943
Bengali calendar	428
Berber calendar	1971
English Regnal year	N/A
Buddhist calendar	1565
Burmese calendar	383
Byzantine calendar	6529–6530
Chinese calendar	庚申年 (Metal Monkey) 3718 or 3511     — to — 辛酉年 (Metal Rooster) 3719 or 3512
Coptic calendar	737–738
Discordian calendar	2187
Ethiopian calendar	1013–1014
Hebrew calendar	4781–4782
Hindu calendars
- Vikram Samvat	1077–1078
- Shaka Samvat	942–943
- Kali Yuga	4121–4122
Holocene calendar	11021
Igbo calendar	21–22
Iranian calendar	399–400
Islamic calendar	411–412
Japanese calendar	Kannin 5 / Jian 1 (治安元年)
Javanese calendar	923–924
Julian calendar	1021 MXXI
Korean calendar	3354
Minguo calendar	891 before ROC 民前891年
Nanakshahi calendar	−447
Seleucid era	1332/1333 AG
Thai solar calendar	1563–1564
Tibetan calendar	阳金猴年 (male Iron-Monkey) 1147 or 766 or −6     — to — 阴金鸡年 (female Iron-Rooster) 1148 or 767 or −5

Events

• The Moorish state of Valencia becomes independent.

Births

• Eudocia Macrembolitissa, empress of Byzantine Emperor Constantine X (d. 1096)
• Wang Anshi, Chinese reformer (d. 1086)

Deaths

• • Tāriqu l-Ḥakīm, Sixth Fatimid Caliph of Egypt (called bi Amr al-Lāh "Ruler by God's Command"), disappears on a trip to the Muqattam Hills (411 A.H.). He is presumed deceased and succeeded by his son, ˤAlī az-Zāhir. However, the Druze, a reformist sect of Ismā'īlī ("Sevener") Shīˤa Muslims, believe him to have been hidden away by God until Judgment Day, when he will return as the Mahdi.

Heads of State

• England - Canute the Great (1016 to 1035)
• France - Robert II the Pious (996 to 1031)
• Byzantine Empire - Basil II (976 to 1025)
• Fātimid Caliphate - ˤAlī az-Zāhir, Seventh Caliph (1021 to 1036), with his father's elder cousin Sitt al-Mulk as the power behind the throne from 1021 to 1023