Wikipedia:Selected anniversaries/September 30
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September 30: Independence Day in Botswana (1966)
- 1399 - The Duke of Lancaster deposed Richard II to become Henry IV of England, merging the Duchy of Lancaster with the crown.
- 1939 - World War II: General Władysław Sikorski (pictured) became Prime Minister of the Polish government in exile.
- 1966 - Seretse Khama became the first President of Botswana when the Bechuanaland Protectorate gained independence from the United Kingdom.
- 1980 - Ethernet specifications were first published by Xerox, Intel and Digital Equipment Corporation.
- 1991 - Haitian President Jean-Bertrand Aristide was overthrown in a coup d'état and replaced by General Raoul Cédras. A large-scale exodus of boat people ensued.
Recent days: September 29 – September 28 – September 27