2021 is the twenty-first year of the third millennium and the twenty-first and second centuries of the 2020s.
The United Nations has declared 2021 as the International Year of Peace and Trust, the International Year of Creative Economics for Sustainable Development, the International Year of Fruits and Vegetables, and the International Year for the Elimination of Child Labor.
January 1 - The African Free Trade Area is established.
A British judge barred Julian Assange from being extradited to the United States, while Mexico offered him political asylum.
The border between Qatar and Saudi Arabia reopened.
Attack on US Congress House: Pros - Donald Trump protesters surround the US Capitol building, disrupting the 2020 presidential election certificate and forcing Congress to evacuate Five people, including a police officer and A woman is shot dead inside the capital. The event is classified as a domestic terrorist attack and carries international condemnation.
Hong Kong Protests 2019-2020: Hong Kong police arrest more than 50 pro-democracy activists under Hong Kong National Security Act.
January 10 - Kim Jong Un is elected secretary general of Korea's ruling Labor Party, inheriting the title from Kim Jong Il's father, who died in 2011.
January 11 - Covid-19's birth disease: The number of COVID-19-confirmed cases exceeds 90 million worldwide.
In Lyon, France, the first hand-shoulder transplant is performed on an Icelandic patient at oudouard Herriot Hospital.
Donald Trump is the first US president to be impeached twice, a week before the invasion of Congress.
The Lao People's Revolutionary Party has elected Laos Tunglon Sisolit as the new Secretary-General to replace retired President Bonhang Wurachit. Siculite is elected as the Senior Leader in Laos for a five-year term.
The Ruthenian government in the Netherlands resigned over the welfare scandal.
COVID-19 pandemic: The global death toll from COVID-19 exceeds 2 million.
January 20 - Joe Biden is inaugurated as the 44th President of the United States.
January 24 - Portuguese Presidential Election: Incumbent President Marcelo Rebelo di Sosa is re-elected.
January 26 - COVID-19 pandemic: The number of COVID-19 confirmed cases exceeds 100 million worldwide.
January 27 - Polish Constitutional Court rules that abortion due to a fetal defect is unconstitutional.