December 24, 1930
In London, Harry Grindell Matthews demonstrates his 'Sky Projector' device to project pictures of an angel, the message "Happy Christmas" and a reportedly "accurate" clock face onto clouds.
In Burdang, Java, Political activist and future first president of Indonesia, Sukarno (6 June 1901 – 21 June 1970) is jailed for four years in his country's struggle for independence from the Netherlands.
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