March 5

Custom Chief's Day (Vanuatu)
Learn from Lei Feng Day
(China)
National Tree Planting Day
(Iran)
St Piran's Day (Cornwall)

1836 – Samuel Colt makes the first production-model revolver, the .34-caliber.
1872 – George Westinghouse patents the air brake.
1931 – The British Viceroy of India, Governor-General Edward Frederick Lindley Wood and Mohandas Gandhi (Mahatma Gandhi) sign an agreement envisaging the release of political prisoners and allowing salt to be freely used by the poorest members of the population.
1933 – Great Depression: President Franklin D. Roosevelt declares a "bank holiday", closing all U.S. banks and freezing all financial transactions.
1940 – Members of Soviet politburo sign an order for the execution of 25,700 Polish intelligentsia, including 14,700 Polish POWs, known also as the Katyn massacre.
1943 – First flight of Gloster Meteor jet aircraft in the United Kingdom.
1946 – Winston Churchill uses the phrase "Iron Curtain" in his speech at Westminster College, Missouri.
1966 – BOAC Flight 911 crashes on Mount Fuji, Japan, killing 124.
1970 – The Nuclear Non-Proliferation Treaty goes into effect after ratification by 43 nations.
1981 – The ZX81, a pioneering British home computer, is launched by Sinclair Research and would go on to sell over 1.5 million units around the world.
1984 – 6,000 miners in the United Kingdom begin their strike at Cortonwood Colliery.
1988 – The Constitution of Turks and Caicos Islands is restored and revised.

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