1924January 1924 January 12 – Gopinath Saha shoots Ernest Day, whom he has mistaken for Sir Charles Tegart, the police commissioner of Calcutta, and is arrested soon after. January 20–30 – Kuomintang in China holds its first National Congress, initiating a policy of alliance with the Soviet Union and the Chinese Communist Party. January 21 – The Earl of Athlone is appointed Governor-General of the Union of South Africa, and High Commissioner for Southern Africa. January 22 – Ramsay MacDonald becomes the first Labour Prime Minister of the United Kingdom.
1933January 1933 January 11 – Sir Charles Kingsford Smith makes the first commercial flight between Australia and New Zealand. January 17 – The United States Congress votes in favour of Philippines independence, against the wishes of U.S. President Herbert Hoover. January 28 – "Pakistan Declaration": Choudhry Rahmat Ali publishes (in Cambridge, UK) a pamphlet entitled Now or Never; Are We to Live or Perish Forever?, in which he calls for the creation of a Muslim state in northwest India that he calls "Pakstan"; this influences the Pakistan Movement.
1926January 1926 January 3 – Theodoros Pangalos declares himself dictator in Greece. January 8 Abdul-Aziz ibn Saud is crowned King of Hejaz. Crown Prince Nguyễn Phúc Vĩnh Thuy ascends the throne, the last monarch of Vietnam. January 12 – Freeman Gosden and Charles Correll premiere their radio program Sam 'n' Henry, in which the two white performers portray two black characters from Harlem looking to strike it rich in the big city (it is a precursor to Gosden and Correll's more popular later program, Amos 'n' Andy).
1930January 1930 January 15 – The Moon moves into its nearest point to Earth, called perigee, at the same time as its fullest phase of the Lunar Cycle. This is the closest moon distance at in recent history, and the next one will be on January 1, 2257, at . January 26 – The Indian National Congress declares this date as Independence Day, or as the day for Poorna Swaraj (Complete Independence). January 28 – The first patent for a field-effect transistor is granted in the United States, to Julius Edgar Lilienfeld.
1931January 1931 January 2 – South Dakota native Ernest Lawrence invents the cyclotron, used to accelerate particles to study nuclear physics. January 4 – German pilot Elly Beinhorn begins her flight to Africa. January 22 – Sir Isaac Isaacs is sworn in as the first Australian-born Governor-General of Australia. January 25 – Mohandas Gandhi is again released from imprisonment in India. January 27 – Pierre Laval forms a government in France.
1941The Correlates of War project estimates this to be the deadliest year in human history in these terms of conflict deaths, placing the death toll at 3.49 million. However, the Uppsala Conflict Data Program estimates that the subsequent year, 1942, was the deadliest such year. Death toll estimates for both 1941 and 1942 range from 2.28 to 7.71 million each. Below, the events of World War II have the "WWII" prefix.
