This timeline of events preceding World War II covers the events (mostly during the interwar period [1918–1939] after World War I) that affected or led to World War II. 1910s: 1910·1918·1919 1920s: 1920·1921·1922· 1923·1924·1925·1926 ·1927·1928·1929 1930s: 1930·1931·1932· 1933·1934·1935·1936 ·1937·1938·1939 Leaders of major participating countries

1895

October 8

1905

September 5

1910

August 22–29

1917

November 7 [ O.S. October 25]

1918

October 28–31 October 28 November 11 November 13 December 27

1919

January 4–15 January 18 January 31 February February 13 March 2 March 12 March 21 May 15 June 21 June 28 July August 1 August 3 August 8 September 10 September 12 November 27

1920

January 21 February 24 March June 4 August 10 October November 2 November 15 December 24

1921

Spring March 7–17 March 18 April 24 August 25 August 29 October 5 November 9

1922

February 6 March April 16 October October 11 October 29 November 1

1923

January 11 January 26 June July 24 August 31 September 27 October 23–25 October 29 November 8

1924

January 21 February 1 March 16 April 1 April 6 June 10 August 16 August 18

1925

January 20 April 4 May 12 July 18 December 1

1926

January 3 January 31 April 24 September 8 December 25

1927

April 12 May 20 June 7 November 12 December 14

1928

May 3 May 28 June 4 August 2 August 27 October 1 November 6

1929

February 9 February 11 March 28 April 3 June 7 July 24 August 31 October 29

1930

April 22 June 30 September 14

1931

May 19 September 18 September 19

1932

January 7 January 28 February 27 March 1 April 10 May 4 May 30 July 25 August 30 November 4 November 8 November 21 December 3

1933

January 1 January 30 February 27 February 28 March 4 March 20 March 23 March 25 March 27 April 1 April 26 May 1 May 2 May 15 May 31 June 21 July 14 August 25 September 2 September 12 October 19 November 16 November 24

1934

January 26 February 9 February 12–16 March 20 May 5 June 30 July 20 July 25 August 2 August 8 September October 5 October 9 October 16 December 1 December 5 December 29

1935

January 7 June 18 August 31 September 15 October 3 November 14

1936

January 20 February 6 February 26 March 7 March 25 May 5 June 3 July 18 August 1 August 19 October October 18 November 3 November 14 November 15 November 25 December 1 December 12 December 23 December 24

1937

January 20 February 21 26 April May 7 May 28 June 21 July 7 August 8 August 13 October 5 October 13 November 5 November 6 November 26 December 1 December 8 December 11 December 12 December 13

1938

January 26 March 6 March 13 March 24 July 6–16 July 29 August September 27 September 30 October 5 November 7 November 9

1939

January 25 January 27 March 14 March 15 March 20 March 21 March 23 March 25 March 31 April 1 April 3 April 4 April 7–12 April 14 April 18 April 28 April 29 May 9 May 11 May 17 May 22 May 31 June 7 June 14 July 10 August 2 August 23 August 25 August 28 August 30 September 1

Notes and references