| Millennium: | 3rd millennium |
|---|---|
| Centuries: | 20th century – 21st century – 22nd century |
| Decades: | 1990s 2000s 2010s – 2020s – 2030s 2040s 2050s |
| Years: | 2018 2019 2020 – 2021 – 2022 2023 2024 |
| 2021 by topic: |
| News by month |
| Jan – Feb – Mar – Apr – May – Jun Jul – Aug – Sep – Oct – Nov – Dec |
| Arts |
| Architecture – Art – Comics – Film – Home video – Literature (Poetry) – Music (Country, Metal, UK) – Radio – Television |
| Politics |
| Elections – Int'l leaders – Politics – State leaders – Sovereign states |
| Science and technology |
| Archaeology – Aviation – Birding/Ornithology – Meteorology – Palaeontology – Rail transport – Science – Spaceflight |
| Sports |
| Sport – Athletics (Track and Field) – Australian Football League – Baseball – Football (soccer) – Cricket – Ice Hockey – Motorsport – Tennis – Rugby league |
| By place |
| Algeria – Argentina – Australia – Canada – People's Republic of China – Denmark – El Salvador – Egypt – European Union – France – Germany – India – Iraq – Iran – Ireland – Israel – Italy – Japan – Kenya – Luxembourg – Malaysia – Mexico – New Zealand – Norway – Pakistan – Palestinian territories – Philippines – Singapore – South Africa – South Korea – Spain – Sri Lanka – United Arab Emirates – United Kingdom – United States – Zimbabwe |
| Other topics |
| Awards – Games – Law – Religious leaders – Video gaming |
| Birth and death categories |
| Births – Deaths |
| Establishments and disestablishments categories |
| Establishments – Disestablishments |
| Works and introductions categories |
| Works – Introductions |
| Gregorian calendar | 2021 MMXXI |
| Ab urbe condita | 2774 |
| Armenian calendar | 1470 ԹՎ ՌՆՀ |
| Bahá'í calendar | 177 – 178 |
| Bengali calendar | 1428 |
| Berber calendar | 2971 |
| Buddhist calendar | 2565 |
| Burmese calendar | 1383 |
| Byzantine calendar | 7529 – 7530 |
| Chinese calendar | 庚子年十一月十八日 (4657/4717-11-18) — to —
辛丑年十一月廿八日(4658/4718-11-28) |
| Coptic calendar | 1737 – 1738 |
| Ethiopian calendar | 2013 – 2014 |
| Hebrew calendar | 5781 – 5782 |
| Hindu calendars | |
| - Bikram Samwat | 2077 – 2078 |
| - Shaka Samvat | 1943 – 1944 |
| - Kali Yuga | 5122 – 5123 |
| Holocene calendar | 12021 |
| Iranian calendar | 1399 – 1400 |
| Islamic calendar | 1442 – 1443 |
| Japanese calendar | Heisei 33 (平成33年) |
| Korean calendar | 4354 |
| Thai solar calendar | 2564 |
| Unix time | 1609459200 – 1640995199 |
2021 (MMXXI) will be a common year starting on a Friday in the Gregorian calendar.
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