Births on May 9

Kalifa Tillisi, Libyan historian and linguist (d. 2010)

Khalifa Mohammed Tillisi (Arabic: خليفة محمد التليسي ;9 May 1930 – 13 January 2010) was a well-known Libyan historian, translator, and linguist.

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".