6th January » Thomas Edison submits his last patent application.
21st January » Sir Isaac Isaacs is sworn in as the first Australian-born Governor-General of Australia.
13th February » New Delhi becomes the capital of India.
20th February » The Congress of the United States approves the construction of the San Francisco – Oakland Bay Bridge by the state of California.
3rd March » The United States adopts 'The Star-Spangled Banner' as its national anthem.
5th March » The British Viceroy of British Raj called India, Governor-General Edward Frederick Lindley Wood and Mohandas Gandhi (Mahatma Gandhi) Gandhi–Irwin Pact or sign an agreement envisaging the release of political prisoners and allowing salt to be freely used b
11th March » 'Ready for Labour and Defence of the USSR', abbreviated as 'GTO', is introduced in the Soviet Union.
15th March » SS called Viking explodes off Newfoundland and Labrador named Newfoundland, killing 27 of the 147 on board.
23rd March » Bhagat Singh, Shivaram Rajguru and Sukhdev Thapar are hanged for murder during the Indian struggle for independence.
25th March » The Scottsboro Boys are arrested in Alabama and charged with rape.
26th March » SwissAir is founded as the national airline of Switzerland.
26th March » Ho Chi Minh Communist Youth Union is founded in Vietnam.
31st March » An 1931 Nicaragua earthquake named earthquake destroys Managua, Nicaragua, killing 2,000.
31st March » TWA Flight 599 crashes near Bazaar, Kansas, killing eight, including University of Notre Dame head football coach Knute Rockne.
14th April » The Cortes Generales known as Spanish Cortes deposes King Alfonso XIII of Spain called Alfonso XIII and proclaims the Second Spanish Republic.
14th April » First edition of the Highway Code published in Great Britain.
1st May » The Empire State Building is dedicated in New York City.
14th May » Ådalen shootings: Five people are killed in Ådalen, Sweden, as soldiers open fire on an unarmed trade union demonstration.
29th May » Michele Schirru, a citizen of the United States, is executed by Italian military firing squad for intent to kill Benito Mussolini.
23rd June » Wiley Post and Harold Gatty take off from Roosevelt Field, Long Island in an attempt to circumnavigate the world in a single-engine plane.
1st July » United Airlines begins service (as Boeing Air Transport).
16th July » Emperor of Ethiopia called Emperor Haile Selassie I signs the 1931 Constitution of Ethiopia called first constitution of Ethiopia.
24th July » A fire at a home for the elderly in Pittsburgh or Pittsburgh, Pennsylvania kills 48 people.
31st July » New York City e.g New York, New York experimental television station W2XAB (now known as WCBS-TV known as WCBS) begins broadcasts.
24th August » France and the Soviet Union sign a neutrality/no attack treaty.
28th August » France and the Soviet Union sign a treaty of non-aggression.
18th September » The Mukden Incident gives Japan the pretext to invade and occupy Manchuria.
30th September » Start of Voortrekkers (youth organisation) named "Die Voortrekkers" youth movement for Afrikaners in Bloemfontein, South Africa.
1st October » The George Washington Bridge linking New Jersey and New York opens.
17th October » Al Capone convicted of income tax tax evasion named evasion.
24th October » The George Washington Bridge opens to public traffic.
7th November » The Chinese Soviet Republic is proclaimed on the anniversary of the Bolshevik Revolution called October Revolution.
9th December » The Constituent Cortes approves a Spanish Constitution of 1931 e.g constitution which establishes the Second Spanish Republic.
11th December » Statute of Westminster 1931: The Parliament of the United Kingdom British Parliament establishes legislative equality between the United Kingdom UK and the Dominions of the Commonwealth of Nations Commonwealth—Australia, Canada, Dominion of Newfound