Wikipedia:Selected anniversaries/September 30
September 30: 800th Anniversary of the Birth of Jalal ad-Din Muhammad Rumi (b. 1207); 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.
- 1791 – The Magic Flute, the last opera composed by Wolfgang Amadeus Mozart, premiered at Theater an der Wien in Vienna, Austria.
- 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 – Xerox, Intel and Digital Equipment Corporation published the first Ethernet specifications, currently the most widespread wired local area network (LAN) technology.
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