1021

1021 (MXXI) was a common year starting on Sunday of the Julian calendar, the 1021st year of the Common Era (CE) and Anno Domini (AD) designations, the 21st year of the 2nd millennium, the 21st year of the 11th century, and the 2nd year of the 1020s decade. As of the start of 1021, the Gregorian calendar was 6 days ahead of the Julian calendar, which was the dominant calendar of the time.

Millennium:	2nd millennium
Centuries:	10th century – 11th century – 12th century
Decades:	990s  1000s  1010s  – 1020s –  1030s  1040s  1050s
Years:	1018 1019 1020 – 1021 – 1022 1023 1024

1021 in other 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) 3717 or 3657     — to — 辛酉年 (Metal Rooster) 3718 or 3658
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 taifa (state) of Valencia (in modern Spain) becomes independent, after being ruled by Slavic soldiers for about ten years.
• Senekerim-Hovhannes Artsruni, king of Vaspurakan (Greater Armenia), surrenders his kingdom to the Byzantine Empire. He receives in return Sebasteia and becomes governor of Cappadocia.