Wikipedia:Selected anniversaries/October 30
- 1806 – War of the Fourth Coalition: Believing that they were massively outnumbered, the 5,300-man German garrison at Stettin, Prussia (now Szczecin, Poland), surrendered to a much smaller French force without a fight.
- 1888 – King Lobengula of Matabeleland granted the Rudd Concession to agents of Cecil Rhodes, setting in motion the creation of the British South Africa Company.
- 1950 – Blanca Canales led the Jayuya Uprising against the Puerto Rican government supported by the United States.
- 1965 – English model Jean Shrimpton wore a controversially short minidress (pictured) to Derby Day at Flemington Racecourse in Melbourne, Australia – a pivotal moment of the introduction of the miniskirt to women's fashion.