- Jan 5 Mao Zedong writes "A Single Spark Can Start a Prairie Fire"
- Mar 12 Mohandas Gandhi begins 200m (300km) march protesting British salt tax
- Mar 13 Clyde Tombaugh announces discovery of Pluto at Lowell Observatory
- Apr 2 Ras Tafari Makonnen becomes Emperor Haile Selassie of Abyssinia (Ethiopia)
- Jun 24 1st radar detection of planes, Anacostia, Washington, D.C.
- Jul 13 1st-ever football (soccer) World Cup competition begins in Uruguay
- Nov 2 Coronation of Ras Tafari Makonnen as Haile Selassie I, 225th Emperor of Ethopian Solmonic Dynasty
"Mickey Mouse" comic strip 1st appears
On January 13, 1930