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Earth Snake (己巳, 6) - Metal Horse (庚午, 7)
- 3.1 January
- 3.2 in February
- 3.3 March
- 3.4 April
- 3.5 May
- 3.6 in June
- 3.7 in July
- 3.8 August
- 3.9 September
- 3:10 October
- 3:11 November
- 3:12 December
- 3:13 Accurate birth unknown
- 4.1 First Quarter
- 4.2 Second Quarter
- 4.3 Third Quarter
- 4.4 Fourth Quarter
- 4.5 More death unknown
Politics and World Affairs
- August 22: The Peruvian President Augusto B. Leguía y Salcedo is deposed and imprisoned in a letter cited by General Luis Miguel Sánchez Cerro coup. The General accepts de facto president
- September 11: The Stromboli volcano erupts. It is, as far as known, the most violent eruption so far this constantly active volcano
- September 14: In the general election, 1930, the Nazi Party is the second largest party
- October 23: The President of the Republic of China, Chiang Kai- shek, occurs to the Methodist faith and was baptized on
- November 2: Haile Selassie ( Ras Tafari Makonnen Ethiopian ) is the Emperor or "King of Kings" crowned
- November 3: After a military coup in October Getúlio Dornelles Vargas takes over the then equipped with dictatorial powers Office of the President of Brazil. The selected candidate for president, Júlio Prestes, will never take it
- November 9: Parliamentary elections in Austria: The Social Democratic Workers Party of Austria will vote and mandate strongest party
- Signing of the Final Act of the Hague, with the reparations Germany are to be settled
- The gangster Al Capone and "Bugs " Moran Chicago share among themselves
Science and Technology
- Wolfgang Pauli postulated the existence of the neutrino.
- Kurt Gödel published his incompleteness theorem.
- Walther Bothe and Herbert Becker discover the neutron.
- Paul Dirac postulated the antimatter ( antiparticles ).
- George Gamow is to be liquid-drop model of the atomic nucleus.
- Philo Taylor Farnsworth describes and patented the idea of building a secondary electron multiplier ( PMT ).
- The Europe, built by Blohm & Voss new fast steamers of the North German Lloyd, his maiden voyage takes to New York and gaining thereby the Blue Riband
- First description of Grisel 's syndrome by the later named Grisel Pierre (1869-1959), a French surgeon.
Architecture and Fine Arts
- October 2: In Berlin, the collections in Alfred Messel's monumental three-wing of the second Pergamon Museum to be opened on the Museum Island.
- October 31: In Bielefeld, Rudolf- Oetker-Halle is dedicated to the Vienna Musikverein Large Pate has confessed.