Births on April 12

Michał Życzkowski, Polish technician and educator (d. 2006)

Michał Życzkowski (12 April 1930 – 24 May 2006) was a Polish mechanical engineer.

6 Apr

Salt Satyagraha
Gandhi raises a lump of mud and salt and declares, "With this, I am shaking the foundations of the British Empire," beginning the Salt Satyagraha.
7 Jul

Hoover Dam
Industrialist Henry J. Kaiser begins construction of Boulder Dam (now known as Hoover Dam).
30 Jul

1930 FIFA World Cup
In Montevideo, Uruguay wins the first FIFA World Cup.
6 Sep

Hipólito Yrigoyen
Democratically elected Argentine president Hipólito Yrigoyen is deposed in a military coup.
24 Oct

Getúlio Vargas
A bloodless coup d'état in Brazil ousts Washington Luís Pereira de Sousa, the last President of the First Republic. Getúlio Vargas is then installed as "provisional president".