Millennium:
3rd millennium
Centuries:
· 20th century
· 21st century
· 22nd century
Decades:
· 2000s
· 2010s
· 2020s
· 2030s
· 2040s
Years:
· 2018
· 2019
· 2020
· 2021
· 2022
· 2023
· 2024
2021 by topic:
Arts
Architecture – Comics – Film – Home video – Literature (Poetry) – Music (Country, Metal, UK) – Radio – Television – Video gaming
Politics
Elections – International leaders – Sovereign states Sovereign state leaders – Territorial governors
Science and technology
Archaeology – Aviation – Birding/Ornithology – Meteorology – Palaeontology – Rail transport – Spaceflight
Sports
Association football (soccer) – Athletics (track and field) – Badminton – Baseball – Basketball – Boxing– Cricket – Golf – Horse racing – Ice hockey – Motorsport – Road cycling – Rugby league – Rugby union – Table tennis – Tennis – Volleyball
By place
Afghanistan – Albania – Algeria – Antarctica – Argentina – Armenia – Australia – Austria – Azerbaijan – Bangladesh – Belgium – Bhutan – Bosnia and Herzegovina – Brazil – Canada – Cape Verde – Chile – China – Colombia – Costa Rica – Croatia – Cuba – Denmark – El Salvador – Egypt – Estonia – Ethiopia – European Union – Finland – France – Georgia – Germany – Ghana – Greece –Guatemala – Hungary – Iceland – India – Indonesia– Iraq – Iran – Ireland – Israel – Italy – Japan – Kazakhstan – Kenya – Kuwait – Laos – Latvia – Libya – Lithuania – Luxembourg – Macau – Malaysia – Mexico – Moldova – Myanmar – Nepal – Netherlands – New Zealand – Nigeria – North Korea– Norway – Oman – Pakistan – Palestine – Philippines – Poland – Romania – Russia – Rwanda– Serbia – Singapore – South Africa – South Korea– Spain – Sri Lanka – Sweden – Taiwan – Tanzania– Thailand – Turkey – Ukraine – United Arab Emirates – United Kingdom – United States – Venezuela – Vietnam – Yemen – Zimbabwe
Other topics
Awards – Law – Religious leaders
Birth and death categories
Births – Deaths
Establishments and disestablishments categories
Establishments – Disestablishments
Works and introductions categories
Works – Introductions Works entering the public domain
· v
· t
· e
2021 in various calendars
Gregorian calendar
2021 MMXXI
Ab urbe condita
2774
Armenian calendar
1470 ԹՎ ՌՆՀ
Assyrian calendar
6771
Bahá'í calendar
177–178
Balinese saka calendar
1942–1943
Bengali calendar
1428
Berber calendar
2971
British Regnal year
N/A
Buddhist calendar
2565
Burmese calendar
1383
Byzantine calendar
7529–7530
Chinese calendar
庚子年 (Metal Rat) 4717 or 4657 — to — 辛丑年 (Metal Ox) 4718 or 4658
Coptic calendar
1737–1738
Discordian calendar
3187
Ethiopian calendar
2013–2014
Hebrew calendar
5781–5782
Hindu calendars
- Vikram Samvat
2077–2078
- Shaka Samvat
- Kali Yuga
5121–5122
Holocene calendar
12021
Igbo calendar
1021–1022
Iranian calendar
1399–1400
Islamic calendar
1442–1443
Japanese calendar
Heisei 33 (平成33年)
Javanese calendar
1954–1955
Juche calendar
110
Julian calendar
Gregorian minus 13 days
Korean calendar
4354
Minguo calendar
ROC 110 民國110年
Nanakshahi calendar
553
Thai solar calendar
2564
Tibetan calendar
阳金鼠年 (male Iron-Rat) 2147 or 1766 or 994 — to — 阴金牛年 (female Iron-Ox) 2148 or 1767 or 995
Unix time
1609459200 – 1640995199