2021
2021 (MMXXI) was a common year starting on Friday of the Gregorian calendar, the 2021st year of the Common Era (CE) and Anno Domini (AD) designations, the 21st year of the 3rd millennium and the 21st century, and the 2nd year of the 2020s decade.
| Millennium: | 3rd millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 2021 by topic |
|---|
| Gregorian calendar | 2021 MMXXI |
| Ab urbe condita | 2774 |
| Armenian calendar | 1470 ԹՎ ՌՆՀ |
| Assyrian calendar | 6771 |
| Baháʼí calendar | 177–178 |
| Balinese saka calendar | 1942–1943 |
| Bengali calendar | 1428 |
| Berber calendar | 2971 |
| British Regnal year | 69 Eliz. 2 – 70 Eliz. 2 |
| Buddhist calendar | 2565 |
| Burmese calendar | 1383 |
| Byzantine calendar | 7529–7530 |
| Chinese calendar | 庚子年 (Metal Rat) 4718 or 4511 — to — 辛丑年 (Metal Ox) 4719 or 4512 |
| Coptic calendar | 1737–1738 |
| Discordian calendar | 3187 |
| Ethiopian calendar | 2013–2014 |
| Hebrew calendar | 5781–5782 |
| Hindu calendars | |
| - Vikram Samvat | 2077–2078 |
| - Shaka Samvat | 1942–1943 |
| - Kali Yuga | 5121–5122 |
| Holocene calendar | 12021 |
| Igbo calendar | 1021–1022 |
| Iranian calendar | 1399–1400 |
| Islamic calendar | 1442–1443 |
| Japanese calendar | Reiwa 3 (令和３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 |
Similar to the year 2020, 2021 was also heavily defined by the COVID-19 pandemic, due to the emergence of multiple COVID-19 variants. The major global rollout of COVID-19 vaccines, which began at the end of 2020, continued in 2021. Most major events scheduled for 2020 that were postponed due to the pandemic were hosted in 2021, including the 26th United Nations Climate Change Conference, Expo 2020, and sporting events such as UEFA Euro 2020, the 2020 Summer Olympics and Paralympics, as well as the 2021 Copa América.
2021 additionally witnessed the rise of non-fungible tokens as a part of the global economy and numerous advancements in space exploration, particularly by the United Arab Emirates, NASA and SpaceX, including the launch of the James Webb Space Telescope. Civil unrest grew in 2021, with coups occurring in Sudan, Myanmar, Mali and Guinea, and insurrections occurring in Armenia and the United States.