Template:Selected anniversaries/June 4

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  1472: Aztec philosopher, warrior, architect, poet, and ruler Nezahualcoyotl dies. He had an experience of an "Unknown, Unknowable Lord of Everywhere" to whom he built an entirely empty temple in which no blood sacrifices of any kind were allowed.

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  1769: Astronomer Guillaume Le Gentil's hopes are dashed when, after years of struggle, overcast conditions prevent him from making a critical observation.

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  1782: Mathematician, physicist, and philosopher Sophie Germain publishes analysis of Fermat's Last Theorem will provides a foundation for mathematicians fighting crimes against mathematical constants for hundreds of years after.

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  1783: The Montgolfier brothers give first public demonstration of balloon flight.

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  1943: Inventor Herman Hollerith uses punched card computation to forecast the position of German submarine U-505 a year in advance, giving the U.S. Navy a strategic advantage in the Second World War.

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  1944: World War Two: A hunter-killer group of the United States Navy captures the German submarine U-505: The first time a U.S. Navy vessel had captured an enemy vessel at sea since the 19th century.

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  1992: Mathematician Melvin Dresher (Dreszer) dies. He contributed to game theory, co-developing the game theoretical model of cooperation and conflict known as the Prisoner's dilemma.