Wikipedia:Selected anniversaries/September 30

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